Convert project to gradle

457 files changed, 48503 insertions, 0 deletions

diff --git a/src/main/java/org/traccar/protocol/AdmProtocol.java b/src/main/java/org/traccar/protocol/AdmProtocol.java
new file mode 100644
index 000000000..08f932ceb
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/AdmProtocol.java
@@ -0,0 +1,44 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LengthFieldBasedFrameDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+import org.traccar.model.Command;
+
+import java.nio.ByteOrder;
+
+public class AdmProtocol extends BaseProtocol {
+
+    public AdmProtocol() {
+        setSupportedDataCommands(
+                Command.TYPE_GET_DEVICE_STATUS,
+                Command.TYPE_CUSTOM);
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LengthFieldBasedFrameDecoder(ByteOrder.LITTLE_ENDIAN, 1024, 2, 1, -3, 0, true));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new AdmProtocolEncoder());
+                pipeline.addLast(new AdmProtocolDecoder(AdmProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/AdmProtocolDecoder.java b/src/main/java/org/traccar/protocol/AdmProtocolDecoder.java
new file mode 100644
index 000000000..52d1439ed
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/AdmProtocolDecoder.java
@@ -0,0 +1,198 @@
+/*
+ * Copyright 2012 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.Date;
+
+public class AdmProtocolDecoder extends BaseProtocolDecoder {
+
+    public AdmProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    public static final int CMD_RESPONSE_SIZE = 0x84;
+    public static final int MSG_IMEI = 0x03;
+    public static final int MSG_PHOTO = 0x0A;
+    public static final int MSG_ADM5 = 0x01;
+
+    private Position decodeData(Channel channel, SocketAddress remoteAddress, ByteBuf buf, int type) {
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        if (BitUtil.to(type, 2) == 0) {
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            position.set(Position.KEY_VERSION_FW, buf.readUnsignedByte());
+            position.set(Position.KEY_INDEX, buf.readUnsignedShortLE());
+
+            int status = buf.readUnsignedShortLE();
+            position.set(Position.KEY_STATUS, status);
+            position.setValid(!BitUtil.check(status, 5));
+            position.setLatitude(buf.readFloatLE());
+            position.setLongitude(buf.readFloatLE());
+            position.setCourse(buf.readUnsignedShortLE() * 0.1);
+            position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShortLE() * 0.1));
+
+            position.set(Position.KEY_ACCELERATION, buf.readUnsignedByte() * 0.1);
+            position.setAltitude(buf.readShortLE());
+            position.set(Position.KEY_HDOP, buf.readUnsignedByte() * 0.1);
+            position.set(Position.KEY_SATELLITES, buf.readUnsignedByte() & 0x0f);
+
+            position.setTime(new Date(buf.readUnsignedIntLE() * 1000));
+
+            position.set(Position.KEY_POWER, buf.readUnsignedShortLE() * 0.001);
+            position.set(Position.KEY_BATTERY, buf.readUnsignedShortLE() * 0.001);
+
+            if (BitUtil.check(type, 2)) {
+                buf.readUnsignedByte(); // vib
+                buf.readUnsignedByte(); // vib_count
+
+                int out = buf.readUnsignedByte();
+                for (int i = 0; i <= 3; i++) {
+                    position.set(Position.PREFIX_OUT + (i + 1), BitUtil.check(out, i) ? 1 : 0);
+                }
+
+                buf.readUnsignedByte(); // in_alarm
+            }
+
+            if (BitUtil.check(type, 3)) {
+                for (int i = 1; i <= 6; i++) {
+                    position.set(Position.PREFIX_ADC + i, buf.readUnsignedShortLE() * 0.001);
+                }
+            }
+
+            if (BitUtil.check(type, 4)) {
+                for (int i = 1; i <= 2; i++) {
+                    position.set(Position.PREFIX_COUNT + i, buf.readUnsignedIntLE());
+                }
+            }
+
+            if (BitUtil.check(type, 5)) {
+                for (int i = 1; i <= 3; i++) {
+                    buf.readUnsignedShortLE(); // fuel level
+                }
+                for (int i = 1; i <= 3; i++) {
+                    position.set(Position.PREFIX_TEMP + i, buf.readUnsignedByte());
+                }
+            }
+
+            if (BitUtil.check(type, 6)) {
+                int endIndex = buf.readerIndex() + buf.readUnsignedByte();
+                while (buf.readerIndex() < endIndex) {
+                    int mask = buf.readUnsignedByte();
+                    long value;
+                    switch (BitUtil.from(mask, 6)) {
+                        case 3:
+                            value = buf.readLongLE();
+                            break;
+                        case 2:
+                            value = buf.readUnsignedIntLE();
+                            break;
+                        case 1:
+                            value = buf.readUnsignedShortLE();
+                            break;
+                        default:
+                            value = buf.readUnsignedByte();
+                            break;
+                    }
+                    int index = BitUtil.to(mask, 6);
+                    switch (index) {
+                        case 1:
+                            position.set(Position.PREFIX_TEMP + 1, value);
+                            break;
+                        case 2:
+                            position.set("humidity", value);
+                            break;
+                        case 3:
+                            position.set("illumination", value);
+                            break;
+                        case 4:
+                            position.set(Position.KEY_BATTERY, value);
+                            break;
+                        default:
+                            position.set("can" + index, value);
+                            break;
+                    }
+                }
+            }
+
+            if (BitUtil.check(type, 7)) {
+                position.set(Position.KEY_ODOMETER, buf.readUnsignedIntLE());
+            }
+
+            return position;
+        }
+
+        return null;
+    }
+
+    private Position parseCommandResponse(Channel channel, SocketAddress remoteAddress, ByteBuf buf) {
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        getLastLocation(position, null);
+
+        int responseTextLength = buf.bytesBefore((byte) 0);
+        if (responseTextLength < 0) {
+            responseTextLength = CMD_RESPONSE_SIZE - 3;
+        }
+        position.set(Position.KEY_RESULT, buf.readSlice(responseTextLength).toString(StandardCharsets.UTF_8));
+
+        return position;
+    }
+
+    @Override
+    protected Object decode(Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+        ByteBuf buf = (ByteBuf) msg;
+
+        buf.readUnsignedShortLE(); // device id
+
+        int size = buf.readUnsignedByte();
+        if (size != CMD_RESPONSE_SIZE) {
+            int type = buf.readUnsignedByte();
+            if (type == MSG_IMEI) {
+                getDeviceSession(channel, remoteAddress, buf.readSlice(15).toString(StandardCharsets.UTF_8));
+            } else {
+                return decodeData(channel, remoteAddress, buf, type);
+            }
+        } else {
+            return parseCommandResponse(channel, remoteAddress, buf);
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/AdmProtocolEncoder.java b/src/main/java/org/traccar/protocol/AdmProtocolEncoder.java
new file mode 100644
index 000000000..e76bc2ddc
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/AdmProtocolEncoder.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2017 Anton Tananaev (anton@traccar.org)
+ * Copyright 2017 Anatoliy Golubev (darth.naihil@gmail.com)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.StringProtocolEncoder;
+import org.traccar.model.Command;
+
+public class AdmProtocolEncoder extends StringProtocolEncoder {
+
+    @Override
+    protected Object encodeCommand(Command command) {
+
+        switch (command.getType()) {
+            case Command.TYPE_GET_DEVICE_STATUS:
+                return formatCommand(command, "STATUS\r\n");
+
+            case Command.TYPE_CUSTOM:
+                return formatCommand(command, "{%s}\r\n", Command.KEY_DATA);
+
+            default:
+                return null;
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/AisProtocol.java b/src/main/java/org/traccar/protocol/AisProtocol.java
new file mode 100644
index 000000000..3b9cad7c8
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/AisProtocol.java
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class AisProtocol extends BaseProtocol {
+
+    public AisProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new AisProtocolDecoder(AisProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/AisProtocolDecoder.java b/src/main/java/org/traccar/protocol/AisProtocolDecoder.java
new file mode 100644
index 000000000..8970f3d4a
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/AisProtocolDecoder.java
@@ -0,0 +1,140 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.BitBuffer;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.regex.Pattern;
+
+public class AisProtocolDecoder extends BaseProtocolDecoder {
+
+    public AisProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("!AIVDM,")
+            .number("(d+),")                     // count
+            .number("(d+),")                     // index
+            .number("(d+)?,")                    // id
+            .expression(".,")                    // radio channel
+            .expression("([^,]+),")              // payload
+            .any()
+            .compile();
+
+    private Position decodePayload(Channel channel, SocketAddress remoteAddress, BitBuffer buf) {
+
+        int type = buf.readUnsigned(6);
+        if (type == 1 || type == 2 || type == 3 || type == 18) {
+
+            buf.readUnsigned(2);
+            int mmsi = buf.readUnsigned(30);
+
+            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, String.valueOf(mmsi));
+            if (deviceSession == null) {
+                return null;
+            }
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            position.setTime(new Date());
+
+            if (type == 18) {
+                buf.readUnsigned(8); // reserved
+            } else {
+                position.set(Position.KEY_STATUS, buf.readUnsigned(4));
+                position.set("turn", buf.readSigned(8));
+            }
+
+            position.setSpeed(buf.readUnsigned(10) * 0.1);
+            position.setValid(buf.readUnsigned(1) != 0);
+            position.setLongitude(buf.readSigned(28) * 0.0001 / 60.0);
+            position.setLatitude(buf.readSigned(27) * 0.0001 / 60.0);
+            position.setCourse(buf.readUnsigned(12) * 0.1);
+
+            position.set("heading", buf.readUnsigned(9));
+
+            return position;
+
+        }
+
+        return null;
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        String[] sentences = ((String) msg).split("\\r\\n");
+
+        List<Position> positions = new ArrayList<>();
+        Map<Integer, BitBuffer> buffers = new HashMap<>();
+
+        for (String sentence : sentences) {
+            if (!sentence.isEmpty()) {
+                Parser parser = new Parser(PATTERN, sentence);
+                if (parser.matches()) {
+
+                    int count = parser.nextInt(0);
+                    int index = parser.nextInt(0);
+                    int id = parser.nextInt(0);
+
+                    Position position = null;
+
+                    if (count == 1) {
+                        BitBuffer bits = new BitBuffer();
+                        bits.writeEncoded(parser.next().getBytes(StandardCharsets.US_ASCII));
+                        position = decodePayload(channel, remoteAddress, bits);
+                    } else {
+                        BitBuffer bits = buffers.get(id);
+                        if (bits == null) {
+                            bits = new BitBuffer();
+                            buffers.put(id, bits);
+                        }
+                        bits.writeEncoded(parser.next().getBytes(StandardCharsets.US_ASCII));
+                        if (count == index) {
+                            position = decodePayload(channel, remoteAddress, bits);
+                            buffers.remove(id);
+                        }
+                    }
+
+                    if (position != null) {
+                        positions.add(position);
+                    }
+
+                }
+            }
+        }
+
+        return positions;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/AlematicsFrameDecoder.java b/src/main/java/org/traccar/protocol/AlematicsFrameDecoder.java
new file mode 100644
index 000000000..be7666657
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/AlematicsFrameDecoder.java
@@ -0,0 +1,50 @@
+/*
+ * Copyright 2017 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.handler.codec.LineBasedFrameDecoder;
+import org.traccar.NetworkMessage;
+
+public class AlematicsFrameDecoder extends LineBasedFrameDecoder {
+
+    private static final int MESSAGE_MINIMUM_LENGTH = 2;
+
+    public AlematicsFrameDecoder(int maxFrameLength) {
+        super(maxFrameLength);
+    }
+
+    // example of heartbeat: FA F8 00 07 00 03 15 AD 4E 78 3A D2
+
+    @Override
+    protected Object decode(ChannelHandlerContext ctx, ByteBuf buf) throws Exception {
+
+        if (buf.readableBytes() < MESSAGE_MINIMUM_LENGTH) {
+            return null;
+        }
+
+        if (buf.getUnsignedShort(buf.readerIndex()) == 0xFAF8) {
+            ByteBuf heartbeat = buf.readRetainedSlice(12);
+            if (ctx != null && ctx.channel() != null) {
+                ctx.channel().writeAndFlush(new NetworkMessage(heartbeat, ctx.channel().remoteAddress()));
+            }
+        }
+
+        return super.decode(ctx, buf);
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/AlematicsProtocol.java b/src/main/java/org/traccar/protocol/AlematicsProtocol.java
new file mode 100644
index 000000000..8da2356b9
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/AlematicsProtocol.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class AlematicsProtocol extends BaseProtocol {
+
+    public AlematicsProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new AlematicsFrameDecoder(1024));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new AlematicsProtocolDecoder(AlematicsProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/AlematicsProtocolDecoder.java b/src/main/java/org/traccar/protocol/AlematicsProtocolDecoder.java
new file mode 100644
index 000000000..25ccf6856
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/AlematicsProtocolDecoder.java
@@ -0,0 +1,157 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class AlematicsProtocolDecoder extends BaseProtocolDecoder {
+
+    public AlematicsProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("$T,")
+            .number("(d+),")                     // type
+            .number("(d+),")                     // index
+            .number("(d+),")                     // id
+            .number("(dddd)(dd)(dd)")            // gps date
+            .number("(dd)(dd)(dd),")             // gps time
+            .number("(dddd)(dd)(dd)")            // device date
+            .number("(dd)(dd)(dd),")             // device time
+            .number("(-?d+.d+),")                // latitude
+            .number("(-?d+.d+),")                // longitude
+            .number("(d+),")                     // speed
+            .number("(d+),")                     // course
+            .number("(-?d+),")                   // altitude
+            .number("(d+.d),")                   // hdop
+            .number("(d+),")                     // satellites
+            .number("(d+),")                     // input
+            .number("(d+),")                     // output
+            .number("(d+.d+),")                  // adc
+            .number("(d+.d+),")                  // power
+            .number("(d+),")                     // odometer
+            .groupBegin()
+            .text("0,$S,")
+            .expression("(.*)")                  // text message
+            .or()
+            .number("(d+),")                     // extra mask
+            .expression("(.*)")                  // extra data
+            .or()
+            .any()
+            .groupEnd()
+            .compile();
+
+    private void decodeExtras(Position position, Parser parser) {
+
+        int mask = parser.nextInt();
+        String[] data = parser.next().split(",");
+
+        int index = 0;
+
+        if (BitUtil.check(mask, 0)) {
+            index++; // pulse counter 3
+        }
+
+        if (BitUtil.check(mask, 1)) {
+            position.set(Position.KEY_POWER, Integer.parseInt(data[index++]));
+        }
+
+        if (BitUtil.check(mask, 2)) {
+            position.set(Position.KEY_BATTERY, Integer.parseInt(data[index++]));
+        }
+
+        if (BitUtil.check(mask, 3)) {
+            position.set(Position.KEY_OBD_SPEED, Integer.parseInt(data[index++]));
+        }
+
+        if (BitUtil.check(mask, 4)) {
+            position.set(Position.KEY_RPM, Integer.parseInt(data[index++]));
+        }
+
+        if (BitUtil.check(mask, 5)) {
+            position.set(Position.KEY_RSSI, Integer.parseInt(data[index++]));
+        }
+
+        if (BitUtil.check(mask, 6)) {
+            index++; // pulse counter 2
+        }
+
+        if (BitUtil.check(mask, 7)) {
+            index++; // magnetic rotation sensor rpm
+        }
+
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+
+        position.set(Position.KEY_TYPE, parser.nextInt());
+        position.set(Position.KEY_INDEX, parser.nextInt());
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setFixTime(parser.nextDateTime());
+        position.setDeviceTime(parser.nextDateTime());
+
+        position.setValid(true);
+        position.setLatitude(parser.nextDouble(0));
+        position.setLongitude(parser.nextDouble(0));
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextInt(0)));
+        position.setCourse(parser.nextInt(0));
+        position.setAltitude(parser.nextInt(0));
+
+        position.set(Position.KEY_HDOP, parser.nextDouble());
+        position.set(Position.KEY_SATELLITES, parser.nextInt());
+        position.set(Position.KEY_INPUT, parser.nextInt());
+        position.set(Position.KEY_OUTPUT, parser.nextInt());
+        position.set(Position.PREFIX_ADC + 1, parser.nextDouble());
+        position.set(Position.KEY_POWER, parser.nextDouble());
+        position.set(Position.KEY_ODOMETER, parser.nextInt());
+
+        if (parser.hasNext()) {
+            position.set("text", parser.next());
+        } else if (parser.hasNext()) {
+            decodeExtras(position, parser);
+        }
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/AnytrekProtocol.java b/src/main/java/org/traccar/protocol/AnytrekProtocol.java
new file mode 100644
index 000000000..4ab5833f7
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/AnytrekProtocol.java
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LengthFieldBasedFrameDecoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class AnytrekProtocol extends BaseProtocol {
+
+    public AnytrekProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LengthFieldBasedFrameDecoder(1024, 2, 2, 2, 0));
+                pipeline.addLast(new AnytrekProtocolDecoder(AnytrekProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/AnytrekProtocolDecoder.java b/src/main/java/org/traccar/protocol/AnytrekProtocolDecoder.java
new file mode 100644
index 000000000..c48f59c90
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/AnytrekProtocolDecoder.java
@@ -0,0 +1,120 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.ByteBufUtil;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+
+public class AnytrekProtocolDecoder extends BaseProtocolDecoder {
+
+    public AnytrekProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private void sendResponse(Channel channel, SocketAddress remoteAddress, int type) {
+        if (channel != null) {
+            ByteBuf response = Unpooled.buffer();
+            response.writeShort(0x7878);
+            response.writeShortLE(1 + 1 + 2 + 1 + 2); // length
+            response.writeByte(type);
+            response.writeByte(0); // error
+            response.writeShortLE(0); // report interval
+            response.writeByte(0); // clear alarm
+            response.writeShortLE(0); // checksum
+            response.writeByte('\r');
+            response.writeByte('\n');
+            channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        buf.skipBytes(2); // header
+        buf.readUnsignedShortLE(); // size
+        int type = buf.readUnsignedByte();
+
+        String imei = ByteBufUtil.hexDump(buf.readSlice(8)).substring(2);
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.set(Position.KEY_VERSION_FW, buf.readUnsignedShortLE());
+        position.set(Position.KEY_BATTERY, buf.readUnsignedShortLE() * 0.01);
+        position.set(Position.KEY_RSSI, buf.readUnsignedByte());
+
+        DateBuilder dateBuilder = new DateBuilder()
+                .setDate(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte())
+                .setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte());
+        position.setTime(dateBuilder.getDate());
+
+        position.set(Position.KEY_SATELLITES, BitUtil.to(buf.readUnsignedByte(), 4));
+
+        double latitude = buf.readUnsignedIntLE() / 1800000.0;
+        double longitude = buf.readUnsignedIntLE() / 1800000.0;
+        position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte()));
+
+        int flags = buf.readUnsignedShortLE();
+        position.setCourse(BitUtil.to(flags, 10));
+        position.setValid(BitUtil.check(flags, 12));
+
+        if (!BitUtil.check(flags, 10)) {
+            latitude = -latitude;
+        }
+        if (BitUtil.check(flags, 11)) {
+            longitude = -longitude;
+        }
+
+        position.setLatitude(latitude);
+        position.setLongitude(longitude);
+
+        buf.readUnsignedIntLE(); // info index
+        buf.readUnsignedIntLE(); // setting index
+
+        flags = buf.readUnsignedByte();
+        position.set(Position.KEY_CHARGE, BitUtil.check(flags, 0));
+        position.set(Position.KEY_IGNITION, BitUtil.check(flags, 1));
+        position.set(Position.KEY_ALARM, BitUtil.check(flags, 4) ? Position.ALARM_GENERAL : null);
+
+        buf.readUnsignedShortLE(); // charge current
+
+        position.set(Position.KEY_ODOMETER, buf.readUnsignedIntLE());
+
+        sendResponse(channel, remoteAddress, type);
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/ApelProtocol.java b/src/main/java/org/traccar/protocol/ApelProtocol.java
new file mode 100644
index 000000000..382aa16af
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/ApelProtocol.java
@@ -0,0 +1,36 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LengthFieldBasedFrameDecoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+import java.nio.ByteOrder;
+public class ApelProtocol extends BaseProtocol {
+
+    public ApelProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LengthFieldBasedFrameDecoder(ByteOrder.LITTLE_ENDIAN, 1024, 2, 2, 4, 0, true));
+                pipeline.addLast(new ApelProtocolDecoder(ApelProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/ApelProtocolDecoder.java b/src/main/java/org/traccar/protocol/ApelProtocolDecoder.java
new file mode 100644
index 000000000..c95a0366a
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/ApelProtocolDecoder.java
@@ -0,0 +1,210 @@
+/*
+ * Copyright 2013 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.Checksum;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.Date;
+import java.util.LinkedList;
+import java.util.List;
+
+public class ApelProtocolDecoder extends BaseProtocolDecoder {
+
+    private long lastIndex;
+    private long newIndex;
+
+    public ApelProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    public static final short MSG_NULL = 0;
+    public static final short MSG_REQUEST_TRACKER_ID = 10;
+    public static final short MSG_TRACKER_ID = 11;
+    public static final short MSG_TRACKER_ID_EXT = 12;
+    public static final short MSG_DISCONNECT = 20;
+    public static final short MSG_REQUEST_PASSWORD = 30;
+    public static final short MSG_PASSWORD = 31;
+    public static final short MSG_REQUEST_STATE_FULL_INFO = 90;
+    public static final short MSG_STATE_FULL_INFO_T104 = 92;
+    public static final short MSG_REQUEST_CURRENT_GPS_DATA = 100;
+    public static final short MSG_CURRENT_GPS_DATA = 101;
+    public static final short MSG_REQUEST_SENSORS_STATE = 110;
+    public static final short MSG_SENSORS_STATE = 111;
+    public static final short MSG_SENSORS_STATE_T100 = 112;
+    public static final short MSG_SENSORS_STATE_T100_4 = 113;
+    public static final short MSG_REQUEST_LAST_LOG_INDEX = 120;
+    public static final short MSG_LAST_LOG_INDEX = 121;
+    public static final short MSG_REQUEST_LOG_RECORDS = 130;
+    public static final short MSG_LOG_RECORDS = 131;
+    public static final short MSG_EVENT = 141;
+    public static final short MSG_TEXT = 150;
+    public static final short MSG_ACK_ALARM = 160;
+    public static final short MSG_SET_TRACKER_MODE = 170;
+    public static final short MSG_GPRS_COMMAND = 180;
+
+    private void sendSimpleMessage(Channel channel, short type) {
+        ByteBuf request = Unpooled.buffer(8);
+        request.writeShortLE(type);
+        request.writeShortLE(0);
+        request.writeIntLE(Checksum.crc32(request.nioBuffer(0, 4)));
+        channel.writeAndFlush(new NetworkMessage(request, channel.remoteAddress()));
+    }
+
+    private void requestArchive(Channel channel) {
+        if (lastIndex == 0) {
+            lastIndex = newIndex;
+        } else if (newIndex > lastIndex) {
+            ByteBuf request = Unpooled.buffer(14);
+            request.writeShortLE(MSG_REQUEST_LOG_RECORDS);
+            request.writeShortLE(6);
+            request.writeIntLE((int) lastIndex);
+            request.writeShortLE(512);
+            request.writeIntLE(Checksum.crc32(request.nioBuffer(0, 10)));
+            channel.writeAndFlush(new NetworkMessage(request, channel.remoteAddress()));
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+        int type = buf.readUnsignedShortLE();
+        boolean alarm = (type & 0x8000) != 0;
+        type = type & 0x7FFF;
+        buf.readUnsignedShortLE(); // length
+
+        if (alarm) {
+            sendSimpleMessage(channel, MSG_ACK_ALARM);
+        }
+
+        if (type == MSG_TRACKER_ID) {
+            return null; // unsupported authentication type
+        }
+
+        if (type == MSG_TRACKER_ID_EXT) {
+
+            buf.readUnsignedIntLE(); // id
+            int length = buf.readUnsignedShortLE();
+            buf.skipBytes(length);
+            length = buf.readUnsignedShortLE();
+            getDeviceSession(channel, remoteAddress, buf.readSlice(length).toString(StandardCharsets.US_ASCII));
+
+        } else if (type == MSG_LAST_LOG_INDEX) {
+
+            long index = buf.readUnsignedIntLE();
+            if (index > 0) {
+                newIndex = index;
+                requestArchive(channel);
+            }
+
+        } else if (type == MSG_CURRENT_GPS_DATA || type == MSG_STATE_FULL_INFO_T104 || type == MSG_LOG_RECORDS) {
+
+            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+            if (deviceSession == null) {
+                return null;
+            }
+
+            List<Position> positions = new LinkedList<>();
+
+            int recordCount = 1;
+            if (type == MSG_LOG_RECORDS) {
+                recordCount = buf.readUnsignedShortLE();
+            }
+
+            for (int j = 0; j < recordCount; j++) {
+                Position position = new Position(getProtocolName());
+                position.setDeviceId(deviceSession.getDeviceId());
+
+                int subtype = type;
+                if (type == MSG_LOG_RECORDS) {
+                    position.set(Position.KEY_ARCHIVE, true);
+                    lastIndex = buf.readUnsignedIntLE() + 1;
+                    position.set(Position.KEY_INDEX, lastIndex);
+
+                    subtype = buf.readUnsignedShortLE();
+                    if (subtype != MSG_CURRENT_GPS_DATA && subtype != MSG_STATE_FULL_INFO_T104) {
+                        buf.skipBytes(buf.readUnsignedShortLE());
+                        continue;
+                    }
+                    buf.readUnsignedShortLE(); // length
+                }
+
+                position.setTime(new Date(buf.readUnsignedIntLE() * 1000));
+                position.setLatitude(buf.readIntLE() * 180.0 / 0x7FFFFFFF);
+                position.setLongitude(buf.readIntLE() * 180.0 / 0x7FFFFFFF);
+
+                if (subtype == MSG_STATE_FULL_INFO_T104) {
+                    int speed = buf.readUnsignedByte();
+                    position.setValid(speed != 255);
+                    position.setSpeed(UnitsConverter.knotsFromKph(speed));
+                    position.set(Position.KEY_HDOP, buf.readByte());
+                } else {
+                    int speed = buf.readShortLE();
+                    position.setValid(speed != -1);
+                    position.setSpeed(UnitsConverter.knotsFromKph(speed * 0.01));
+                }
+
+                position.setCourse(buf.readShortLE() * 0.01);
+                position.setAltitude(buf.readShortLE());
+
+                if (subtype == MSG_STATE_FULL_INFO_T104) {
+
+                    position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
+                    position.set(Position.KEY_RSSI, buf.readUnsignedByte());
+                    position.set(Position.KEY_EVENT, buf.readUnsignedShortLE());
+                    position.set(Position.KEY_ODOMETER, buf.readUnsignedIntLE());
+                    position.set(Position.KEY_INPUT, buf.readUnsignedByte());
+                    position.set(Position.KEY_OUTPUT, buf.readUnsignedByte());
+
+                    for (int i = 1; i <= 8; i++) {
+                        position.set(Position.PREFIX_ADC + i, buf.readUnsignedShortLE());
+                    }
+
+                    position.set(Position.PREFIX_COUNT + 1, buf.readUnsignedIntLE());
+                    position.set(Position.PREFIX_COUNT + 2, buf.readUnsignedIntLE());
+                    position.set(Position.PREFIX_COUNT + 3, buf.readUnsignedIntLE());
+                }
+
+                positions.add(position);
+            }
+
+            buf.readUnsignedIntLE(); // crc
+
+            if (type == MSG_LOG_RECORDS) {
+                requestArchive(channel);
+            } else {
+                sendSimpleMessage(channel, MSG_REQUEST_LAST_LOG_INDEX);
+            }
+
+            return positions;
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/AplicomFrameDecoder.java b/src/main/java/org/traccar/protocol/AplicomFrameDecoder.java
new file mode 100644
index 000000000..56fca27c7
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/AplicomFrameDecoder.java
@@ -0,0 +1,62 @@
+/*
+ * Copyright 2013 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+import org.traccar.BaseFrameDecoder;
+
+public class AplicomFrameDecoder extends BaseFrameDecoder {
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+        // Skip Alive message
+        while (buf.isReadable() && Character.isDigit(buf.getByte(buf.readerIndex()))) {
+            buf.readByte();
+        }
+
+        // Check minimum length
+        if (buf.readableBytes() < 11) {
+            return null;
+        }
+
+        // Read flags
+        int version = buf.getUnsignedByte(buf.readerIndex() + 1);
+        int offset = 1 + 1 + 3;
+        if ((version & 0x80) != 0) {
+            offset += 4;
+        }
+
+        // Get data length
+        int length = buf.getUnsignedShort(buf.readerIndex() + offset);
+        offset += 2;
+        if ((version & 0x40) != 0) {
+            offset += 3;
+        }
+        length += offset; // add header
+
+        // Return buffer
+        if (buf.readableBytes() >= length) {
+            return buf.readRetainedSlice(length);
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/AplicomProtocol.java b/src/main/java/org/traccar/protocol/AplicomProtocol.java
new file mode 100644
index 000000000..2b9dbf97c
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/AplicomProtocol.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class AplicomProtocol extends BaseProtocol {
+
+    public AplicomProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new AplicomFrameDecoder());
+                pipeline.addLast(new AplicomProtocolDecoder(AplicomProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/AplicomProtocolDecoder.java b/src/main/java/org/traccar/protocol/AplicomProtocolDecoder.java
new file mode 100644
index 000000000..215aa0211
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/AplicomProtocolDecoder.java
@@ -0,0 +1,702 @@
+/*
+ * Copyright 2013 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.ByteBufUtil;
+import io.netty.channel.Channel;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.Context;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.Checksum;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.ArrayList;
+import java.util.Date;
+
+public class AplicomProtocolDecoder extends BaseProtocolDecoder {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(AplicomProtocolDecoder.class);
+
+    public AplicomProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final long IMEI_BASE_TC65_V20 = 0x1437207000000L;
+    private static final long IMEI_BASE_TC65_V28 = 358244010000000L;
+    private static final long IMEI_BASE_TC65I_V11 = 0x14143B4000000L;
+
+    private static boolean validateImei(long imei) {
+        return Checksum.luhn(imei / 10) == imei % 10;
+    }
+
+    private static long imeiFromUnitId(long unitId) {
+
+        if (unitId == 0) {
+
+            return 0;
+
+        } else {
+
+            // Try TC65i
+            long imei = IMEI_BASE_TC65I_V11 + unitId;
+            if (validateImei(imei)) {
+                return imei;
+            }
+
+            // Try TC65 v2.8
+            imei = IMEI_BASE_TC65_V28 + ((unitId + 0xA8180) & 0xFFFFFF);
+            if (validateImei(imei)) {
+                return imei;
+            }
+
+            // Try TC65 v2.0
+            imei = IMEI_BASE_TC65_V20 + unitId;
+            if (validateImei(imei)) {
+                return imei;
+            }
+
+        }
+
+        return unitId;
+    }
+
+    private static final int DEFAULT_SELECTOR_D = 0x0002fC;
+    private static final int DEFAULT_SELECTOR_E = 0x007ffc;
+    private static final int DEFAULT_SELECTOR_F = 0x0007fd;
+
+    private static final int EVENT_DATA = 119;
+
+    private void decodeEventData(Position position, ByteBuf buf, int event) {
+        switch (event) {
+            case 2:
+            case 40:
+                buf.readUnsignedByte();
+                break;
+            case 9:
+                buf.readUnsignedMedium();
+                break;
+            case 31:
+            case 32:
+                buf.readUnsignedShort();
+                break;
+            case 38:
+                buf.skipBytes(4 * 9);
+                break;
+            case 113:
+                buf.readUnsignedInt();
+                buf.readUnsignedByte();
+                break;
+            case 119:
+                position.set("eventData", ByteBufUtil.hexDump(
+                        buf, buf.readerIndex(), Math.min(buf.readableBytes(), 1024)));
+                break;
+            case 121:
+            case 142:
+                buf.readLong();
+                break;
+            case 130:
+                buf.readUnsignedInt(); // incorrect
+                break;
+            case 188:
+                decodeEB(position, buf);
+                break;
+            default:
+                break;
+        }
+    }
+
+    private void decodeCanData(ByteBuf buf, Position position) {
+
+        buf.readUnsignedMedium(); // packet identifier
+        position.set(Position.KEY_VERSION_FW, buf.readUnsignedByte());
+        int count = buf.readUnsignedByte();
+        buf.readUnsignedByte(); // batch count
+        buf.readUnsignedShort(); // selector bit
+        buf.readUnsignedInt(); // timestamp
+
+        buf.skipBytes(8);
+
+        ArrayList<ByteBuf> values = new ArrayList<>(count);
+
+        for (int i = 0; i < count; i++) {
+            values.add(buf.readSlice(8));
+        }
+
+        for (int i = 0; i < count; i++) {
+            ByteBuf value = values.get(i);
+            switch (buf.readInt()) {
+                case 0x20D:
+                    position.set(Position.KEY_RPM, value.readShortLE());
+                    position.set("dieselTemperature", value.readShortLE() * 0.1);
+                    position.set("batteryVoltage", value.readShortLE() * 0.01);
+                    position.set("supplyAirTempDep1", value.readShortLE() * 0.1);
+                    break;
+                case 0x30D:
+                    position.set("activeAlarm", ByteBufUtil.hexDump(value));
+                    break;
+                case 0x40C:
+                    position.set("airTempDep1", value.readShortLE() * 0.1);
+                    position.set("airTempDep2", value.readShortLE() * 0.1);
+                    break;
+                case 0x40D:
+                    position.set("coldUnitState", ByteBufUtil.hexDump(value));
+                    break;
+                case 0x50C:
+                    position.set("defrostTempDep1", value.readShortLE() * 0.1);
+                    position.set("defrostTempDep2", value.readShortLE() * 0.1);
+                    break;
+                case 0x50D:
+                    position.set("condenserPressure", value.readShortLE() * 0.1);
+                    position.set("suctionPressure", value.readShortLE() * 0.1);
+                    break;
+                case 0x58C:
+                    value.readByte();
+                    value.readShort(); // index
+                    switch (value.readByte()) {
+                        case 0x01:
+                            position.set("setpointZone1", value.readIntLE() * 0.1);
+                            break;
+                        case 0x02:
+                            position.set("setpointZone2", value.readIntLE() * 0.1);
+                            break;
+                        case 0x05:
+                            position.set("unitType", value.readIntLE());
+                            break;
+                        case 0x13:
+                            position.set("dieselHours", value.readIntLE() / 60 / 60);
+                            break;
+                        case 0x14:
+                            position.set("electricHours", value.readIntLE() / 60 / 60);
+                            break;
+                        case 0x17:
+                            position.set("serviceIndicator", value.readIntLE());
+                            break;
+                        case 0x18:
+                            position.set("softwareVersion", value.readIntLE() * 0.01);
+                            break;
+                        default:
+                            break;
+                    }
+                    break;
+                default:
+                    LOGGER.warn("Aplicom CAN decoding error", new UnsupportedOperationException());
+                    break;
+            }
+        }
+    }
+
+    private void decodeD(Position position, ByteBuf buf, int selector, int event) {
+
+        if ((selector & 0x0008) != 0) {
+            position.setValid((buf.readUnsignedByte() & 0x40) != 0);
+        } else {
+            getLastLocation(position, null);
+        }
+
+        if ((selector & 0x0004) != 0) {
+            position.setDeviceTime(new Date(buf.readUnsignedInt() * 1000));
+        }
+
+        if ((selector & 0x0008) != 0) {
+            position.setFixTime(new Date(buf.readUnsignedInt() * 1000));
+            if (position.getDeviceTime() == null) {
+                position.setDeviceTime(position.getFixTime());
+            }
+            position.setLatitude(buf.readInt() / 1000000.0);
+            position.setLongitude(buf.readInt() / 1000000.0);
+            position.set(Position.KEY_SATELLITES_VISIBLE, buf.readUnsignedByte());
+        }
+
+        if ((selector & 0x0010) != 0) {
+            position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte()));
+            position.set("maximumSpeed", buf.readUnsignedByte());
+            position.setCourse(buf.readUnsignedByte() * 2.0);
+        }
+
+        if ((selector & 0x0040) != 0) {
+            position.set(Position.KEY_INPUT, buf.readUnsignedByte());
+        }
+
+        if ((selector & 0x0020) != 0) {
+            position.set(Position.PREFIX_ADC + 1, buf.readUnsignedShort());
+            position.set(Position.PREFIX_ADC + 2, buf.readUnsignedShort());
+            position.set(Position.PREFIX_ADC + 3, buf.readUnsignedShort());
+            position.set(Position.PREFIX_ADC + 4, buf.readUnsignedShort());
+        }
+
+        if ((selector & 0x8000) != 0) {
+            position.set(Position.KEY_POWER, buf.readUnsignedShort() * 0.001);
+            position.set(Position.KEY_BATTERY, buf.readUnsignedShort() * 0.001);
+        }
+
+        // Pulse rate 1
+        if ((selector & 0x10000) != 0) {
+            buf.readUnsignedShort();
+            buf.readUnsignedInt();
+        }
+
+        // Pulse rate 2
+        if ((selector & 0x20000) != 0) {
+            buf.readUnsignedShort();
+            buf.readUnsignedInt();
+        }
+
+        if ((selector & 0x0080) != 0) {
+            position.set("trip1", buf.readUnsignedInt());
+        }
+
+        if ((selector & 0x0100) != 0) {
+            position.set("trip2", buf.readUnsignedInt());
+        }
+
+        if ((selector & 0x0040) != 0) {
+            position.set(Position.KEY_OUTPUT, buf.readUnsignedByte());
+        }
+
+        if ((selector & 0x0200) != 0) {
+            position.set(Position.KEY_DRIVER_UNIQUE_ID,
+                    String.valueOf(((long) buf.readUnsignedShort()) << 32) + buf.readUnsignedInt());
+        }
+
+        if ((selector & 0x0400) != 0) {
+            buf.readUnsignedByte(); // Keypad
+        }
+
+        if ((selector & 0x0800) != 0) {
+            position.setAltitude(buf.readShort());
+        }
+
+        if ((selector & 0x2000) != 0) {
+            buf.readUnsignedShort(); // snapshot counter
+        }
+
+        if ((selector & 0x4000) != 0) {
+            buf.skipBytes(8); // state flags
+        }
+
+        if ((selector & 0x80000) != 0) {
+            buf.skipBytes(11); // cell info
+        }
+
+        if ((selector & 0x1000) != 0) {
+            decodeEventData(position, buf, event);
+        }
+
+        if (Context.getConfig().getBoolean(getProtocolName() + ".can")
+                && buf.isReadable() && (selector & 0x1000) != 0 && event == EVENT_DATA) {
+            decodeCanData(buf, position);
+        }
+    }
+
+    private void decodeE(Position position, ByteBuf buf, int selector) {
+
+        if ((selector & 0x0008) != 0) {
+            position.set("tachographEvent", buf.readUnsignedShort());
+        }
+
+        if ((selector & 0x0004) != 0) {
+            getLastLocation(position, new Date(buf.readUnsignedInt() * 1000));
+        } else {
+            getLastLocation(position, null);
+        }
+
+        if ((selector & 0x0010) != 0) {
+            String time = buf.readUnsignedByte() + "s " + buf.readUnsignedByte() + "m " + buf.readUnsignedByte() + "h "
+                    + buf.readUnsignedByte() + "M " + buf.readUnsignedByte() + "D " + buf.readUnsignedByte() + "Y "
+                    + buf.readByte() + "m " + buf.readByte() + "h";
+            position.set("tachographTime", time);
+        }
+
+        position.set("workState", buf.readUnsignedByte());
+        position.set("driver1State", buf.readUnsignedByte());
+        position.set("driver2State", buf.readUnsignedByte());
+
+        if ((selector & 0x0020) != 0) {
+            position.set("tachographStatus", buf.readUnsignedByte());
+        }
+
+        if ((selector & 0x0040) != 0) {
+            position.set(Position.KEY_OBD_SPEED, buf.readUnsignedShort() / 256.0);
+        }
+
+        if ((selector & 0x0080) != 0) {
+            position.set(Position.KEY_OBD_ODOMETER, buf.readUnsignedInt() * 5);
+        }
+
+        if ((selector & 0x0100) != 0) {
+            position.set(Position.KEY_ODOMETER_TRIP, buf.readUnsignedInt() * 5);
+        }
+
+        if ((selector & 0x8000) != 0) {
+            position.set("kFactor", buf.readUnsignedShort() * 0.001 + " pulses/m");
+        }
+
+        if ((selector & 0x0200) != 0) {
+            position.set(Position.KEY_RPM, buf.readUnsignedShort() * 0.125);
+        }
+
+        if ((selector & 0x0400) != 0) {
+            position.set("extraInfo", buf.readUnsignedShort());
+        }
+
+        if ((selector & 0x0800) != 0) {
+            position.set(Position.KEY_VIN, buf.readSlice(18).toString(StandardCharsets.US_ASCII).trim());
+        }
+
+        if ((selector & 0x2000) != 0) {
+            buf.readUnsignedByte(); // card 1 type
+            buf.readUnsignedByte(); // card 1 country code
+            String card = buf.readSlice(20).toString(StandardCharsets.US_ASCII).trim();
+            if (!card.isEmpty()) {
+                position.set("card1", card);
+            }
+        }
+
+        if ((selector & 0x4000) != 0) {
+            buf.readUnsignedByte(); // card 2 type
+            buf.readUnsignedByte(); // card 2 country code
+            String card = buf.readSlice(20).toString(StandardCharsets.US_ASCII).trim();
+            if (!card.isEmpty()) {
+                position.set("card2", card);
+            }
+        }
+
+        if ((selector & 0x10000) != 0) {
+            int count = buf.readUnsignedByte();
+            for (int i = 1; i <= count; i++) {
+                position.set("driver" + i, buf.readSlice(22).toString(StandardCharsets.US_ASCII).trim());
+                position.set("driverTime" + i, buf.readUnsignedInt());
+            }
+        }
+    }
+
+    private void decodeH(Position position, ByteBuf buf, int selector) {
+
+        if ((selector & 0x0004) != 0) {
+            getLastLocation(position, new Date(buf.readUnsignedInt() * 1000));
+        } else {
+            getLastLocation(position, null);
+        }
+
+        if ((selector & 0x0040) != 0) {
+            buf.readUnsignedInt(); // reset time
+        }
+
+        if ((selector & 0x2000) != 0) {
+            buf.readUnsignedShort(); // snapshot counter
+        }
+
+        int index = 1;
+        while (buf.readableBytes() > 0) {
+
+            position.set("h" + index + "Index", buf.readUnsignedByte());
+
+            buf.readUnsignedShort(); // length
+
+            int n = buf.readUnsignedByte();
+            int m = buf.readUnsignedByte();
+
+            position.set("h" + index + "XLength", n);
+            position.set("h" + index + "YLength", m);
+
+            if ((selector & 0x0008) != 0) {
+                position.set("h" + index + "XType", buf.readUnsignedByte());
+                position.set("h" + index + "YType", buf.readUnsignedByte());
+                position.set("h" + index + "Parameters", buf.readUnsignedByte());
+            }
+
+            boolean percentageFormat = (selector & 0x0020) != 0;
+
+            StringBuilder data = new StringBuilder();
+            for (int i = 0; i < n * m; i++) {
+                if (percentageFormat) {
+                    data.append(buf.readUnsignedByte() * 0.5).append("%").append(" ");
+                } else {
+                    data.append(buf.readUnsignedShort()).append(" ");
+                }
+            }
+
+            position.set("h" + index + "Data", data.toString().trim());
+
+            position.set("h" + index + "Total", buf.readUnsignedInt());
+
+            if ((selector & 0x0010) != 0) {
+                int k = buf.readUnsignedByte();
+
+                data = new StringBuilder();
+                for (int i = 1; i < n; i++) {
+                    if (k == 1) {
+                        data.append(buf.readByte()).append(" ");
+                    } else if (k == 2) {
+                        data.append(buf.readShort()).append(" ");
+                    }
+                }
+                position.set("h" + index + "XLimits", data.toString().trim());
+
+                data = new StringBuilder();
+                for (int i = 1; i < m; i++) {
+                    if (k == 1) {
+                        data.append(buf.readByte()).append(" ");
+                    } else if (k == 2) {
+                        data.append(buf.readShort()).append(" ");
+                    }
+                }
+                position.set("h" + index + "YLimits", data.toString().trim());
+            }
+
+            index += 1;
+        }
+    }
+
+    private void decodeEB(Position position, ByteBuf buf) {
+
+        if (buf.readByte() != (byte) 'E' || buf.readByte() != (byte) 'B') {
+            return;
+        }
+
+        position.set(Position.KEY_VERSION_FW, buf.readUnsignedByte());
+        position.set(Position.KEY_EVENT, buf.readUnsignedShort());
+        position.set("dataValidity", buf.readUnsignedByte());
+        position.set("towed", buf.readUnsignedByte());
+        buf.readUnsignedShort(); // length
+
+        while (buf.readableBytes() > 0) {
+            buf.readUnsignedByte(); // towed position
+            int type = buf.readUnsignedByte();
+            int length = buf.readUnsignedByte();
+            int end = buf.readerIndex() + length;
+
+            switch (type) {
+                case 0x01:
+                    position.set("brakeFlags", ByteBufUtil.hexDump(buf.readSlice(length)));
+                    break;
+                case 0x02:
+                    position.set("wheelSpeed", buf.readUnsignedShort() / 256.0);
+                    position.set("wheelSpeedDifference", buf.readUnsignedShort() / 256.0 - 125.0);
+                    position.set("lateralAcceleration", buf.readUnsignedByte() / 10.0 - 12.5);
+                    position.set("vehicleSpeed", buf.readUnsignedShort() / 256.0);
+                    break;
+                case 0x03:
+                    position.set(Position.KEY_AXLE_WEIGHT, buf.readUnsignedShort() * 2);
+                    break;
+                case 0x04:
+                    position.set("tyrePressure", buf.readUnsignedByte() * 10);
+                    position.set("pneumaticPressure", buf.readUnsignedByte() * 5);
+                    break;
+                case 0x05:
+                    position.set("brakeLining", buf.readUnsignedByte() * 0.4);
+                    position.set("brakeTemperature", buf.readUnsignedByte() * 10);
+                    break;
+                case 0x06:
+                    position.set(Position.KEY_ODOMETER, buf.readUnsignedInt() * 5L);
+                    position.set(Position.KEY_ODOMETER_TRIP, buf.readUnsignedInt() * 5L);
+                    position.set(Position.KEY_ODOMETER_SERVICE, (buf.readUnsignedInt() - 2105540607) * 5L);
+                    break;
+                case 0x0A:
+                    position.set("absStatusCounter", buf.readUnsignedShort());
+                    position.set("atvbStatusCounter", buf.readUnsignedShort());
+                    position.set("vdcActiveCounter", buf.readUnsignedShort());
+                    break;
+                case 0x0B:
+                    position.set("brakeMinMaxData", ByteBufUtil.hexDump(buf.readSlice(length)));
+                    break;
+                case 0x0C:
+                    position.set("missingPgn", ByteBufUtil.hexDump(buf.readSlice(length)));
+                    break;
+                case 0x0D:
+                    buf.readUnsignedByte();
+                    position.set("towedDetectionStatus", buf.readUnsignedInt());
+                    buf.skipBytes(17); // vin
+                    break;
+                case 0x0E:
+                default:
+                    break;
+            }
+
+            buf.readerIndex(end);
+        }
+    }
+
+    private void decodeF(Position position, ByteBuf buf, int selector) {
+
+        Date deviceTime = null;
+
+        if ((selector & 0x0004) != 0) {
+            deviceTime = new Date(buf.readUnsignedInt() * 1000);
+        }
+
+        getLastLocation(position, deviceTime);
+
+        buf.readUnsignedByte(); // data validity
+
+        if ((selector & 0x0008) != 0) {
+            position.set(Position.KEY_RPM, buf.readUnsignedShort());
+            position.set("rpmMax", buf.readUnsignedShort());
+            position.set("rpmMin", buf.readUnsignedShort());
+        }
+
+        if ((selector & 0x0010) != 0) {
+            position.set("engineTemp", buf.readShort());
+            position.set("engineTempMax", buf.readShort());
+            position.set("engineTempMin", buf.readShort());
+        }
+
+        if ((selector & 0x0020) != 0) {
+            position.set(Position.KEY_HOURS, UnitsConverter.msFromHours(buf.readUnsignedInt()));
+            position.set("serviceDistance", buf.readInt());
+            position.set("driverActivity", buf.readUnsignedByte());
+            position.set(Position.KEY_THROTTLE, buf.readUnsignedByte());
+            position.set(Position.KEY_FUEL_LEVEL, buf.readUnsignedByte());
+        }
+
+        if ((selector & 0x0040) != 0) {
+            position.set(Position.KEY_FUEL_USED, buf.readUnsignedInt());
+        }
+
+        if ((selector & 0x0080) != 0) {
+            position.set(Position.KEY_ODOMETER, buf.readUnsignedInt());
+        }
+
+        if ((selector & 0x0100) != 0) {
+            position.set(Position.KEY_OBD_SPEED, buf.readUnsignedByte());
+            position.set("speedMax", buf.readUnsignedByte());
+            position.set("speedMin", buf.readUnsignedByte());
+            position.set("hardBraking", buf.readUnsignedByte());
+        }
+
+        if ((selector & 0x0200) != 0) {
+            position.set("tachographSpeed", buf.readUnsignedByte());
+            position.set("driver1State", buf.readUnsignedByte());
+            position.set("driver2State", buf.readUnsignedByte());
+            position.set("tachographStatus", buf.readUnsignedByte());
+            position.set("overspeedCount", buf.readUnsignedByte());
+        }
+
+        if ((selector & 0x0800) != 0) {
+            position.set(Position.KEY_HOURS, buf.readUnsignedInt() * 0.05);
+            position.set(Position.KEY_RPM, buf.readUnsignedShort() * 0.125);
+            position.set(Position.KEY_OBD_SPEED, buf.readUnsignedShort() / 256.0);
+            position.set(Position.KEY_FUEL_USED, buf.readUnsignedInt() * 0.5);
+            position.set(Position.KEY_FUEL_LEVEL, buf.readUnsignedByte() * 0.4);
+        }
+
+        if ((selector & 0x1000) != 0) {
+            position.set("ambientTemperature", buf.readUnsignedShort() * 0.03125 - 273);
+            buf.readUnsignedShort(); // fuel rate
+            position.set("fuelEconomy", buf.readUnsignedShort() / 512.0);
+            position.set(Position.KEY_FUEL_CONSUMPTION, buf.readUnsignedInt() * 0.001);
+            buf.readUnsignedByte(); // pto drive engagement
+        }
+
+        if ((selector & 0x2000) != 0) {
+            buf.skipBytes(buf.readUnsignedByte()); // driver identification
+        }
+
+        if ((selector & 0x4000) != 0) {
+            position.set("torque", buf.readUnsignedByte());
+            position.set("brakePressure1", buf.readUnsignedByte() * 8);
+            position.set("brakePressure2", buf.readUnsignedByte() * 8);
+            position.set("grossWeight", buf.readUnsignedShort() * 10);
+            position.set("exhaustFluid", buf.readUnsignedByte() * 0.4);
+            buf.readUnsignedByte(); // retarder torque mode
+            position.set("retarderTorque", buf.readUnsignedByte());
+            position.set("retarderSelection", buf.readUnsignedByte() * 0.4);
+            buf.skipBytes(8); // tell tale status block 1
+            buf.skipBytes(8); // tell tale status block 2
+            buf.skipBytes(8); // tell tale status block 3
+            buf.skipBytes(8); // tell tale status block 4
+        }
+
+        if ((selector & 0x8000) != 0) {
+            position.set("parkingBrakeStatus", buf.readUnsignedByte());
+            position.set("doorStatus", buf.readUnsignedByte());
+            buf.skipBytes(8); // status per door
+            position.set("alternatorStatus", buf.readUnsignedByte());
+            position.set("selectedGear", buf.readUnsignedByte());
+            position.set("currentGear", buf.readUnsignedByte());
+            buf.skipBytes(4 * 2); // air suspension pressure
+        }
+
+        if ((selector & 0x0400) != 0) {
+            int count = buf.readUnsignedByte();
+            for (int i = 0; i < count; i++) {
+                position.set("axle" + i, buf.readUnsignedShort());
+            }
+        }
+
+    }
+
+    @Override
+    protected Object decode(Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        char protocol = (char) buf.readByte();
+        int version = buf.readUnsignedByte();
+
+        String imei;
+        if ((version & 0x80) != 0) {
+            imei = String.valueOf((buf.readUnsignedInt() << (3 * 8)) | buf.readUnsignedMedium());
+        } else {
+            imei = String.valueOf(imeiFromUnitId(buf.readUnsignedMedium()));
+        }
+
+        buf.readUnsignedShort(); // length
+
+        int selector = DEFAULT_SELECTOR_D;
+        if (protocol == 'E') {
+            selector = DEFAULT_SELECTOR_E;
+        } else if (protocol == 'F') {
+            selector = DEFAULT_SELECTOR_F;
+        }
+        if ((version & 0x40) != 0) {
+            selector = buf.readUnsignedMedium();
+        }
+
+        Position position = new Position(getProtocolName());
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        int event = buf.readUnsignedByte();
+        position.set(Position.KEY_EVENT, event);
+        position.set("eventInfo", buf.readUnsignedByte());
+
+        if (protocol == 'D') {
+            decodeD(position, buf, selector, event);
+        } else if (protocol == 'E') {
+            decodeE(position, buf, selector);
+        } else if (protocol == 'H') {
+            decodeH(position, buf, selector);
+        } else if (protocol == 'F') {
+            decodeF(position, buf, selector);
+        } else {
+            return null;
+        }
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/AppelloProtocol.java b/src/main/java/org/traccar/protocol/AppelloProtocol.java
new file mode 100644
index 000000000..1ca4168e4
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/AppelloProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LineBasedFrameDecoder;
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class AppelloProtocol extends BaseProtocol {
+
+    public AppelloProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LineBasedFrameDecoder(1024));
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new AppelloProtocolDecoder(AppelloProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/AppelloProtocolDecoder.java b/src/main/java/org/traccar/protocol/AppelloProtocolDecoder.java
new file mode 100644
index 000000000..47e329234
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/AppelloProtocolDecoder.java
@@ -0,0 +1,92 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class AppelloProtocolDecoder extends BaseProtocolDecoder {
+
+    public AppelloProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("FOLLOWIT,")                   // brand
+            .number("(d+),")                     // imei
+            .groupBegin()
+            .number("(dd)(dd)(dd)")              // date (yymmdd)
+            .number("(dd)(dd)(dd).?d*,")         // time (hhmmss)
+            .or()
+            .text("UTCTIME,")
+            .groupEnd()
+            .number("(-?d+.d+),")                // latitude
+            .number("(-?d+.d+),")                // longitude
+            .number("(d+),")                     // speed
+            .number("(d+),")                     // course
+            .number("(d+),")                     // satellites
+            .number("(-?d+),")                   // altitude
+            .expression("([FL]),")               // gps state
+            .any()
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        String imei = parser.next();
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        if (parser.hasNext(6)) {
+            position.setTime(parser.nextDateTime());
+        } else {
+            getLastLocation(position, null);
+        }
+
+        position.setLatitude(parser.nextDouble(0));
+        position.setLongitude(parser.nextDouble(0));
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
+
+        position.set(Position.KEY_SATELLITES, parser.nextInt(0));
+
+        position.setAltitude(parser.nextDouble(0));
+
+        position.setValid(parser.next().equals("F"));
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/AppletProtocol.java b/src/main/java/org/traccar/protocol/AppletProtocol.java
new file mode 100644
index 000000000..2297dca03
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/AppletProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.http.HttpObjectAggregator;
+import io.netty.handler.codec.http.HttpRequestDecoder;
+import io.netty.handler.codec.http.HttpResponseEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class AppletProtocol extends BaseProtocol {
+
+    public AppletProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new HttpResponseEncoder());
+                pipeline.addLast(new HttpRequestDecoder());
+                pipeline.addLast(new HttpObjectAggregator(16384));
+                pipeline.addLast(new AppletProtocolDecoder(AppletProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/AppletProtocolDecoder.java b/src/main/java/org/traccar/protocol/AppletProtocolDecoder.java
new file mode 100644
index 000000000..7a995cc24
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/AppletProtocolDecoder.java
@@ -0,0 +1,48 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import io.netty.handler.codec.http.FullHttpRequest;
+import io.netty.handler.codec.http.HttpResponseStatus;
+import org.traccar.BaseHttpProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+
+import java.net.SocketAddress;
+
+public class AppletProtocolDecoder extends BaseHttpProtocolDecoder {
+
+    public AppletProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    @Override
+    protected Object decode(Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        FullHttpRequest request = (FullHttpRequest) msg;
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, request.headers().get("From"));
+        if (deviceSession != null) {
+            sendResponse(channel, HttpResponseStatus.OK);
+        } else {
+            sendResponse(channel, HttpResponseStatus.BAD_REQUEST);
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/AquilaProtocol.java b/src/main/java/org/traccar/protocol/AquilaProtocol.java
new file mode 100644
index 000000000..5ca1ec091
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/AquilaProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LineBasedFrameDecoder;
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class AquilaProtocol extends BaseProtocol {
+
+    public AquilaProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LineBasedFrameDecoder(1024));
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new AquilaProtocolDecoder(AquilaProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/AquilaProtocolDecoder.java b/src/main/java/org/traccar/protocol/AquilaProtocolDecoder.java
new file mode 100644
index 000000000..57af5e366
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/AquilaProtocolDecoder.java
@@ -0,0 +1,403 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.Context;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.CellTower;
+import org.traccar.model.Network;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class AquilaProtocolDecoder extends BaseProtocolDecoder {
+
+    public AquilaProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN_A = new PatternBuilder()
+            .text("$$")
+            .expression("[^,]*,")                // client
+            .number("(d+),")                     // device serial number
+            .number("(d+),")                     // event
+            .number("(-?d+.d+),")                // latitude
+            .number("(-?d+.d+),")                // longitude
+            .number("(dd)(dd)(dd)")              // date (yymmdd)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .expression("([AV]),")               // validity
+            .groupBegin()
+            .number("(d+),")                     // gsm
+            .number("(d+),")                     // speed
+            .number("(d+),")                     // distance
+            .groupBegin()
+            .number("d+,")                       // driver code
+            .number("(d+),")                     // fuel
+            .number("([01]),")                   // io 1
+            .number("[01],")                     // case open switch
+            .number("[01],")                     // over speed start
+            .number("[01],")                     // over speed end
+            .number("(?:d+,){3}")                // reserved
+            .number("([01]),")                   // power status
+            .number("([01]),")                   // io 2
+            .number("d+,")                       // reserved
+            .number("([01]),")                   // ignition
+            .number("[01],")                     // ignition off event
+            .number("(?:d+,){7}")                // reserved
+            .number("[01],")                     // corner packet
+            .number("(?:d+,){8}")                // reserved
+            .number("([01]),")                   // course bit 0
+            .number("([01]),")                   // course bit 1
+            .number("([01]),")                   // course bit 2
+            .number("([01]),")                   // course bit 3
+            .or()
+            .number("(d+),")                     // course
+            .number("(?:d+,){3}")                // reserved
+            .number("[01],")                     // over speed start
+            .number("[01],")                     // over speed end
+            .number("(?:d+,){3}")                // reserved
+            .number("([01]),")                   // power status
+            .number("(?:d+,){2}")                // reserved
+            .number("[01],")                     // ignition on event
+            .number("([01]),")                   // ignition
+            .number("[01],")                     // ignition off event
+            .number("(?:d+,){5}")                // reserved
+            .number("[01],")                     // low battery
+            .number("[01],")                     // corner packet
+            .number("(?:d+,){6}")                // reserved
+            .number("[01],")                     // hard acceleration
+            .number("[01],")                     // hard braking
+            .number("[01],[01],[01],[01],")      // course bits
+            .number("(d+),")                     // external voltage
+            .number("(d+),")                     // internal voltage
+            .number("(?:d+,){6}")                // reserved
+            .expression("P([^,]+),")             // obd
+            .expression("D([^,]+),")             // dtcs
+            .number("-?d+,")                     // accelerometer x
+            .number("-?d+,")                     // accelerometer y
+            .number("-?d+,")                     // accelerometer z
+            .number("d+,")                       // delta distance
+            .or()
+            .number("(d+),")                     // course
+            .number("(d+),")                     // satellites
+            .number("(d+.d+),")                  // hdop
+            .number("(?:d+,){2}")                // reserved
+            .number("(d+),")                     // adc 1
+            .number("([01]),")                   // di 1
+            .number("[01],")                     // case open
+            .number("[01],")                     // over speed start
+            .number("[01],")                     // over speed end
+            .number("(?:[01],){2}")              // reserved
+            .number("[01],")                     // immobilizer
+            .number("([01]),")                   // power status
+            .number("([01]),")                   // di 2
+            .number("(?:[01],){2}")              // reserved
+            .number("([01]),")                   // ignition
+            .number("(?:[01],){6}")              // reserved
+            .number("[01],")                     // low battery
+            .number("[01],")                     // corner packet
+            .number("(?:[01],){4}")              // reserved
+            .number("[01],")                     // do 1
+            .number("[01],")                     // reserved
+            .number("[01],")                     // hard acceleration
+            .number("[01],")                     // hard braking
+            .number("(?:[01],){4}")              // reserved
+            .number("(d+),")                     // external voltage
+            .number("(d+),")                     // internal voltage
+            .groupEnd()
+            .or()
+            .number("(d+),")                     // sensor id
+            .expression("([^,]+),")              // sensor data
+            .groupEnd()
+            .text("*")
+            .number("xx")                        // checksum
+            .compile();
+
+    private Position decodeA(Channel channel, SocketAddress remoteAddress, String sentence) {
+
+        Parser parser = new Parser(PATTERN_A, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.set(Position.KEY_EVENT, parser.nextInt(0));
+
+        position.setLatitude(parser.nextDouble(0));
+        position.setLongitude(parser.nextDouble(0));
+
+        position.setTime(parser.nextDateTime());
+
+        position.setValid(parser.next().equals("A"));
+
+        if (parser.hasNext(3)) {
+            position.set(Position.KEY_RSSI, parser.nextInt(0));
+            position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
+            position.set(Position.KEY_ODOMETER, parser.nextInt(0));
+        }
+
+        if (parser.hasNext(9)) {
+
+            position.set(Position.KEY_FUEL_LEVEL, parser.nextInt());
+            position.set(Position.PREFIX_IN + 1, parser.next());
+            position.set(Position.KEY_CHARGE, parser.next().equals("1"));
+            position.set(Position.PREFIX_IN + 2, parser.next());
+
+            position.set(Position.KEY_IGNITION, parser.nextInt(0) == 1);
+
+            int course = (parser.nextInt(0) << 3) + (parser.nextInt(0) << 2)
+                    + (parser.nextInt(0) << 1) + parser.nextInt(0);
+            if (course > 0 && course <= 8) {
+                position.setCourse((course - 1) * 45);
+            }
+
+        } else if (parser.hasNext(7)) {
+
+            position.setCourse(parser.nextInt(0));
+
+            position.set(Position.KEY_CHARGE, parser.next().equals("1"));
+            position.set(Position.KEY_IGNITION, parser.nextInt(0) == 1);
+            position.set(Position.KEY_POWER, parser.nextInt(0));
+            position.set(Position.KEY_BATTERY, parser.nextInt(0));
+
+            String obd = parser.next();
+            position.set("obd", obd.substring(1, obd.length() - 1));
+
+            String dtcs = parser.next();
+            position.set(Position.KEY_DTCS, dtcs.substring(1, dtcs.length() - 1).replace('|', ' '));
+
+        } else if (parser.hasNext(10)) {
+
+            position.setCourse(parser.nextInt(0));
+
+            position.set(Position.KEY_SATELLITES, parser.nextInt(0));
+            position.set(Position.KEY_HDOP, parser.nextDouble(0));
+            position.set(Position.PREFIX_ADC + 1, parser.nextInt(0));
+            position.set(Position.PREFIX_IN + 1, parser.nextInt(0));
+            position.set(Position.KEY_CHARGE, parser.next().equals("1"));
+            position.set(Position.PREFIX_IN + 2, parser.nextInt(0));
+            position.set(Position.KEY_IGNITION, parser.nextInt(0) == 1);
+            position.set(Position.KEY_POWER, parser.nextInt(0));
+            position.set(Position.KEY_BATTERY, parser.nextInt(0));
+
+        } else if (parser.hasNext(2)) {
+
+            position.set("sensorId", parser.nextInt());
+            position.set("sensorData", parser.next());
+
+        }
+
+        return position;
+    }
+
+    private static final Pattern PATTERN_B_1 = new PatternBuilder()
+            .text("$")
+            .expression("[^,]+,")                // header
+            .expression("[^,]+,")                // client
+            .expression("[^,]+,")                // firmware version
+            .expression(".{2},")                 // packet type
+            .number("d+,")                       // message id
+            .expression("[LH],")                 // status
+            .number("(d+),")                     // imei
+            .expression("[^,]+,")                // registration number
+            .number("([01]),")                   // validity
+            .number("(dd)(dd)(dddd),")           // date (ddmmyyyy)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .number("(-?d+.d+),")                // latitude
+            .expression("([NS]),")
+            .number("(-?d+.d+),")                // longitude
+            .expression("([EW]),")
+            .number("(d+.d+),")                  // speed
+            .number("(d+),")                     // course
+            .number("(d+),")                     // satellites
+            .number("(-?d+.d+),")                // altitude
+            .number("(d+.d+),")                  // pdop
+            .number("(d+.d+),")                  // hdop
+            .expression("[^,]+,")                // operator
+            .number("([01]),")                   // ignition
+            .number("([01]),")                   // charge
+            .number("(d+.d+),")                  // power
+            .number("(d+.d+),")                  // battery
+            .number("([01]),")                   // emergency
+            .expression("[CO],")                 // tamper
+            .number("(d+),")                     // rssi
+            .number("(d+),")                     // mcc
+            .number("(d+),")                     // mnc
+            .number("(x+),")                     // lac
+            .number("(x+),")                     // cid
+            .number("(d+),(x+),(x+),")           // cell 1
+            .number("(d+),(x+),(x+),")           // cell 2
+            .number("(d+),(x+),(x+),")           // cell 3
+            .number("(d+),(x+),(x+),")           // cell 4
+            .number("([01])+,")                  // inputs
+            .number("([01])+,")                  // outputs
+            .number("d+,")                       // frame number
+            .number("(d+.d+),")                  // adc1
+            .number("(d+.d+),")                  // adc2
+            .number("d+,")                       // delta distance
+            .any()
+            .compile();
+
+    private static final Pattern PATTERN_B_2 = new PatternBuilder()
+            .text("$")
+            .expression("[^,]+,")                // header
+            .expression("[^,]+,")                // client
+            .expression("(.{3}),")               // message type
+            .number("(d+),")                     // imei
+            .expression(".{2},")                 // packet type
+            .number("(dd)(dd)(dddd)")            // date (ddmmyyyy)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .expression("([AV]),")               // validity
+            .number("(-?d+.d+),")                // latitude
+            .expression("([NS]),")
+            .number("(-?d+.d+),")                // longitude
+            .expression("([EW]),")
+            .number("(-?d+.d+),")                // altitude
+            .number("(d+.d+),")                  // speed
+            .any()
+            .compile();
+
+    private Position decodeB2(Channel channel, SocketAddress remoteAddress, String sentence) {
+
+        Parser parser = new Parser(PATTERN_B_2, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        String type = parser.next();
+        String id = parser.next();
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, id);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
+        position.setValid(parser.next().equals("A"));
+        position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM));
+        position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM));
+        position.setAltitude(parser.nextDouble());
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble()));
+
+        if (type.equals("EMR") && channel != null) {
+            String password = Context.getIdentityManager().lookupAttributeString(
+                    deviceSession.getDeviceId(), getProtocolName() + ".password", "aquila123", true);
+            channel.writeAndFlush(new NetworkMessage(
+                    "#set$" + id + "@" + password + "#EMR_MODE:0*", remoteAddress));
+        }
+
+        return position;
+    }
+
+    private Position decodeB1(Channel channel, SocketAddress remoteAddress, String sentence) {
+
+        Parser parser = new Parser(PATTERN_B_1, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        String id = parser.next();
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, id);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setValid(parser.nextInt() == 1);
+        position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
+        position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM));
+        position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM));
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble()));
+        position.setCourse(parser.nextInt());
+
+        position.set(Position.KEY_SATELLITES, parser.nextInt());
+
+        position.setAltitude(parser.nextDouble());
+
+        position.set(Position.KEY_PDOP, parser.nextDouble());
+        position.set(Position.KEY_HDOP, parser.nextDouble());
+        position.set(Position.KEY_IGNITION, parser.nextInt() == 1);
+        position.set(Position.KEY_CHARGE, parser.nextInt() == 1);
+        position.set(Position.KEY_POWER, parser.nextDouble());
+        position.set(Position.KEY_BATTERY, parser.nextDouble());
+
+        if (parser.nextInt() == 1) {
+            position.set(Position.KEY_ALARM, Position.ALARM_SOS);
+        }
+
+        Network network = new Network();
+
+        int rssi = parser.nextInt();
+        int mcc = parser.nextInt();
+        int mnc = parser.nextInt();
+
+        network.addCellTower(CellTower.from(mcc, mnc, parser.nextHexInt(), parser.nextHexInt(), rssi));
+        for (int i = 0; i < 4; i++) {
+            rssi = parser.nextInt();
+            network.addCellTower(CellTower.from(mcc, mnc, parser.nextHexInt(), parser.nextHexInt(), rssi));
+        }
+
+        position.setNetwork(network);
+
+        position.set(Position.KEY_INPUT, parser.nextBinInt());
+        position.set(Position.KEY_OUTPUT, parser.nextBinInt());
+        position.set(Position.PREFIX_ADC + 1, parser.nextDouble());
+        position.set(Position.PREFIX_ADC + 2, parser.nextDouble());
+
+        return position;
+    }
+
+    private Position decodeB(Channel channel, SocketAddress remoteAddress, String sentence) {
+        if (sentence.contains("EMR") || sentence.contains("SEM")) {
+            return decodeB2(channel, remoteAddress, sentence);
+        } else {
+            return decodeB1(channel, remoteAddress, sentence);
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        String sentence = (String) msg;
+
+        if (sentence.startsWith("$$")) {
+            return decodeA(channel, remoteAddress, sentence);
+        } else {
+            return decodeB(channel, remoteAddress, sentence);
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Ardi01Protocol.java b/src/main/java/org/traccar/protocol/Ardi01Protocol.java
new file mode 100644
index 000000000..f7826430f
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Ardi01Protocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LineBasedFrameDecoder;
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class Ardi01Protocol extends BaseProtocol {
+
+    public Ardi01Protocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LineBasedFrameDecoder(1024));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new Ardi01ProtocolDecoder(Ardi01Protocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Ardi01ProtocolDecoder.java b/src/main/java/org/traccar/protocol/Ardi01ProtocolDecoder.java
new file mode 100644
index 000000000..85e9ecfde
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Ardi01ProtocolDecoder.java
@@ -0,0 +1,87 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class Ardi01ProtocolDecoder extends BaseProtocolDecoder {
+
+    public Ardi01ProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .number("(d+),")                     // imei
+            .number("(dddd)(dd)(dd)")            // date (yyyymmdd)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .number("(-?d+.d+),")                // longitude
+            .number("(-?d+.d+),")                // latitude
+            .number("(d+.?d*),")                 // speed
+            .number("(d+.?d*),")                 // course
+            .number("(-?d+.?d*),")               // altitude
+            .number("(d+),")                     // satellites
+            .number("(d+),")                     // event
+            .number("(d+),")                     // battery
+            .number("(-?d+)")                    // temperature
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setTime(parser.nextDateTime());
+
+        position.setLongitude(parser.nextDouble(0));
+        position.setLatitude(parser.nextDouble(0));
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
+        position.setCourse(parser.nextDouble(0));
+        position.setAltitude(parser.nextDouble(0));
+
+        int satellites = parser.nextInt(0);
+        position.setValid(satellites >= 3);
+        position.set(Position.KEY_SATELLITES, satellites);
+
+        position.set(Position.KEY_EVENT, parser.next());
+        position.set(Position.KEY_BATTERY_LEVEL, parser.nextInt(0));
+        position.set(Position.PREFIX_TEMP + 1, parser.next());
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/ArknavProtocol.java b/src/main/java/org/traccar/protocol/ArknavProtocol.java
new file mode 100644
index 000000000..3b485e4a5
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/ArknavProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.CharacterDelimiterFrameDecoder;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class ArknavProtocol extends BaseProtocol {
+
+    public ArknavProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, '\r'));
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new ArknavProtocolDecoder(ArknavProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/ArknavProtocolDecoder.java b/src/main/java/org/traccar/protocol/ArknavProtocolDecoder.java
new file mode 100644
index 000000000..4982e02fc
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/ArknavProtocolDecoder.java
@@ -0,0 +1,83 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class ArknavProtocolDecoder extends BaseProtocolDecoder {
+
+    public ArknavProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .number("(d+),")                     // imei
+            .expression(".{6},")                 // id code
+            .number("ddd,")                      // status
+            .number("Lddd,")                     // version
+            .expression("([AV]),")               // validity
+            .number("(dd)(dd.d+),")              // latitude
+            .expression("([NS]),")
+            .number("(ddd)(dd.d+),")             // longitude
+            .expression("([EW]),")
+            .number("(d+.?d*),")                 // speed
+            .number("(d+.?d*),")                 // course
+            .number("(d+.?d*),")                 // hdop
+            .number("(dd):(dd):(dd) ")           // time (hh:mm:ss)
+            .number("(dd)-(dd)-(dd),")           // date (dd-mm-yy)
+            .any()
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setValid(parser.next().equals("A"));
+        position.setLatitude(parser.nextCoordinate());
+        position.setLongitude(parser.nextCoordinate());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
+
+        position.set(Position.KEY_HDOP, parser.nextDouble(0));
+
+        position.setTime(parser.nextDateTime(Parser.DateTimeFormat.HMS_DMY));
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/ArknavX8Protocol.java b/src/main/java/org/traccar/protocol/ArknavX8Protocol.java
new file mode 100644
index 000000000..a29bc1ad3
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/ArknavX8Protocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.CharacterDelimiterFrameDecoder;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class ArknavX8Protocol extends BaseProtocol {
+
+    public ArknavX8Protocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, ';'));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new ArknavX8ProtocolDecoder(ArknavX8Protocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/ArknavX8ProtocolDecoder.java b/src/main/java/org/traccar/protocol/ArknavX8ProtocolDecoder.java
new file mode 100644
index 000000000..b570f5423
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/ArknavX8ProtocolDecoder.java
@@ -0,0 +1,139 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class ArknavX8ProtocolDecoder extends BaseProtocolDecoder {
+
+    public ArknavX8ProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN_1G = new PatternBuilder()
+            .expression("(..),")                 // type
+            .number("(dd)(dd)(dd)")              // date (yymmdd)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .expression("([AV]),")               // validity
+            .number("(d+)(dd.d+)([NS]),")        // latitude
+            .number("(d+)(dd.d+)([EW]),")        // longitude
+            .number("(d+.d+),")                  // speed
+            .number("(d+),")                     // course
+            .number("(d+.d+),")                  // hdop
+            .number("(d+)")                      // status
+            .compile();
+
+    private static final Pattern PATTERN_2G = new PatternBuilder()
+            .expression("..,")                   // type
+            .number("(dd)(dd)(dd)")              // date (yymmdd)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .number("(d+),")                     // satellites
+            .number("(d+.d+),")                  // altitude
+            .number("(d+.d+),")                  // power
+            .number("(d+.d+),")                  // battery
+            .number("(d+.d+)")                   // odometer
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        String sentence = (String) msg;
+
+        if (sentence.charAt(2) != ',') {
+            getDeviceSession(channel, remoteAddress, sentence.substring(0, 15));
+            return null;
+        }
+
+        switch (sentence.substring(0, 2)) {
+            case "1G":
+            case "1R":
+            case "1M":
+                return decode1G(channel, remoteAddress, sentence);
+            case "2G":
+                return decode2G(channel, remoteAddress, sentence);
+            default:
+                return null;
+        }
+    }
+
+    private Position decode1G(Channel channel, SocketAddress remoteAddress, String sentence) {
+
+        Parser parser = new Parser(PATTERN_1G, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.set(Position.KEY_TYPE, parser.next());
+
+        position.setTime(parser.nextDateTime());
+
+        position.setValid(parser.next().equals("A"));
+        position.setLatitude(parser.nextCoordinate());
+        position.setLongitude(parser.nextCoordinate());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
+
+        position.set(Position.KEY_HDOP, parser.nextDouble(0));
+        position.set(Position.KEY_STATUS, parser.next());
+
+        return position;
+    }
+
+    private Position decode2G(Channel channel, SocketAddress remoteAddress, String sentence) {
+
+        Parser parser = new Parser(PATTERN_2G, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        getLastLocation(position, parser.nextDateTime());
+
+        position.set(Position.KEY_SATELLITES, parser.nextInt());
+        position.setAltitude(parser.nextDouble());
+        position.set(Position.KEY_POWER, parser.nextDouble());
+        position.set(Position.KEY_BATTERY, parser.nextDouble());
+        position.set(Position.KEY_ODOMETER, parser.nextDouble() * 1852 / 3600);
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/ArnaviProtocol.java b/src/main/java/org/traccar/protocol/ArnaviProtocol.java
new file mode 100644
index 000000000..afe491865
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/ArnaviProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LineBasedFrameDecoder;
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class ArnaviProtocol extends BaseProtocol {
+
+    public ArnaviProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LineBasedFrameDecoder(1024));
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new ArnaviProtocolDecoder(ArnaviProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/ArnaviProtocolDecoder.java b/src/main/java/org/traccar/protocol/ArnaviProtocolDecoder.java
new file mode 100644
index 000000000..7996cf429
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/ArnaviProtocolDecoder.java
@@ -0,0 +1,105 @@
+/*
+ * Copyright 2015 - 2019 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class ArnaviProtocolDecoder extends BaseProtocolDecoder {
+
+    public ArnaviProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("$AV,")
+            .number("Vd,")                       // type
+            .number("(d+),")                     // device id
+            .number("(d+),")                     // index
+            .number("(d+),")                     // power
+            .number("(d+),")                     // battery
+            .number("-?d+,")
+            .expression("[01],")                 // movement
+            .expression("([01]),")               // ignition
+            .number("(d+),")                     // input
+            .number("d+,d+,")                    // input 1
+            .number("d+,d+,").optional()         // input 2
+            .expression("[01],")                 // fix type
+            .number("(d+),")                     // satellites
+            .groupBegin()
+            .number("(d+.d+)?,")                 // altitude
+            .number("(?:d+.d+)?,")               // geoid height
+            .groupEnd("?")
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .number("(dd)(dd.d+)([NS]),")        // latitude
+            .number("(ddd)(dd.d+)([EW]),")       // longitude
+            .number("(d+.d+),")                  // speed
+            .number("(d+.d+),")                  // course
+            .number("(dd)(dd)(dd)")              // date (ddmmyy)
+            .any()
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.set(Position.KEY_INDEX, parser.nextInt());
+        position.set(Position.KEY_POWER, parser.nextInt() * 0.01);
+        position.set(Position.KEY_BATTERY, parser.nextInt() * 0.01);
+        position.set(Position.KEY_IGNITION, parser.nextInt() == 1);
+        position.set(Position.KEY_INPUT, parser.nextInt());
+        position.set(Position.KEY_SATELLITES, parser.nextInt());
+
+        position.setAltitude(parser.nextDouble(0));
+
+        DateBuilder dateBuilder = new DateBuilder()
+                .setTime(parser.nextInt(), parser.nextInt(), parser.nextInt());
+
+        position.setValid(true);
+        position.setLatitude(parser.nextCoordinate());
+        position.setLongitude(parser.nextCoordinate());
+        position.setSpeed(parser.nextDouble());
+        position.setCourse(parser.nextDouble());
+
+        dateBuilder.setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt());
+        position.setTime(dateBuilder.getDate());
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/AstraProtocol.java b/src/main/java/org/traccar/protocol/AstraProtocol.java
new file mode 100644
index 000000000..12b0dfb68
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/AstraProtocol.java
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LengthFieldBasedFrameDecoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class AstraProtocol extends BaseProtocol {
+
+    public AstraProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LengthFieldBasedFrameDecoder(1024, 1, 2, -3, 0));
+                pipeline.addLast(new AstraProtocolDecoder(AstraProtocol.this));
+            }
+        });
+        addServer(new TrackerServer(true, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new AstraProtocolDecoder(AstraProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/AstraProtocolDecoder.java b/src/main/java/org/traccar/protocol/AstraProtocolDecoder.java
new file mode 100644
index 000000000..e6f546b9f
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/AstraProtocolDecoder.java
@@ -0,0 +1,129 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.LinkedList;
+import java.util.List;
+
+public class AstraProtocolDecoder extends BaseProtocolDecoder {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(AstraProtocolDecoder.class);
+
+    public AstraProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    public static final int MSG_HEARTBEAT = 0x1A;
+    public static final int MSG_DATA = 0x10;
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        if (channel != null) {
+            channel.writeAndFlush(new NetworkMessage(Unpooled.wrappedBuffer(new byte[] {0x06}), remoteAddress));
+        }
+
+        buf.readUnsignedByte(); // protocol
+        buf.readUnsignedShort(); // length
+
+        String imei = String.format("%08d", buf.readUnsignedInt()) + String.format("%07d", buf.readUnsignedMedium());
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        List<Position> positions = new LinkedList<>();
+
+        while (buf.readableBytes() > 2) {
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            buf.readUnsignedByte(); // index
+
+            position.setValid(true);
+            position.setLatitude(buf.readInt() * 0.000001);
+            position.setLongitude(buf.readInt() * 0.000001);
+
+            DateBuilder dateBuilder = new DateBuilder()
+                    .setDate(1980, 1, 6).addMillis(buf.readUnsignedInt() * 1000L);
+            position.setTime(dateBuilder.getDate());
+
+            position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte() * 2));
+            position.setCourse(buf.readUnsignedByte() * 2);
+
+            int reason = buf.readUnsignedMedium();
+            position.set(Position.KEY_EVENT, reason);
+
+            int status = buf.readUnsignedShort();
+            position.set(Position.KEY_STATUS, status);
+
+            position.set(Position.PREFIX_IO + 1, buf.readUnsignedByte());
+            position.set(Position.PREFIX_ADC + 1, buf.readUnsignedByte());
+            position.set(Position.KEY_BATTERY, buf.readUnsignedByte());
+            position.set(Position.KEY_POWER, buf.readUnsignedByte());
+
+            buf.readUnsignedByte(); // max journey speed
+            buf.skipBytes(6); // accelerometer
+            position.set(Position.KEY_ODOMETER_TRIP, buf.readUnsignedShort());
+            buf.readUnsignedShort(); // journey idle time
+
+            position.setAltitude(buf.readUnsignedByte() * 20);
+
+            int quality = buf.readUnsignedByte();
+            position.set(Position.KEY_SATELLITES, quality & 0xf);
+            position.set(Position.KEY_RSSI, quality >> 4);
+
+            buf.readUnsignedByte(); // geofence events
+
+            if (BitUtil.check(status, 8)) {
+                position.set(Position.KEY_DRIVER_UNIQUE_ID, buf.readSlice(7).toString(StandardCharsets.US_ASCII));
+                position.set(Position.KEY_ODOMETER, buf.readUnsignedMedium() * 1000);
+                position.set(Position.KEY_HOURS, UnitsConverter.msFromHours(buf.readUnsignedShort()));
+            }
+
+            if (BitUtil.check(status, 6)) {
+                LOGGER.warn("Extension data is not supported");
+                return position;
+            }
+
+            positions.add(position);
+
+        }
+
+        return positions;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/At2000FrameDecoder.java b/src/main/java/org/traccar/protocol/At2000FrameDecoder.java
new file mode 100644
index 000000000..5fa82a5f7
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/At2000FrameDecoder.java
@@ -0,0 +1,81 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+import org.traccar.BaseFrameDecoder;
+import org.traccar.NetworkMessage;
+
+public class At2000FrameDecoder extends BaseFrameDecoder {
+
+    private static final int BLOCK_LENGTH = 16;
+    private static final int ACK_LENGTH = 496;
+
+    private boolean firstPacket = true;
+
+    private ByteBuf currentBuffer;
+    private int acknowledgedBytes;
+
+    private void sendResponse(Channel channel) {
+        if (channel != null) {
+            ByteBuf response = Unpooled.buffer(2 * BLOCK_LENGTH);
+            response.writeByte(At2000ProtocolDecoder.MSG_ACKNOWLEDGEMENT);
+            response.writeMedium(1);
+            response.writeByte(0x00); // success
+            response.writerIndex(2 * BLOCK_LENGTH);
+            channel.writeAndFlush(new NetworkMessage(response, channel.remoteAddress()));
+        }
+    }
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+        if (buf.readableBytes() < 5) {
+            return null;
+        }
+
+        int length;
+        if (firstPacket) {
+            firstPacket = false;
+            length = buf.getUnsignedMediumLE(buf.readerIndex() + 2);
+        } else {
+            length = buf.getUnsignedMediumLE(buf.readerIndex() + 1);
+        }
+
+        length += BLOCK_LENGTH;
+        if (length % BLOCK_LENGTH != 0) {
+            length = (length / BLOCK_LENGTH + 1) * BLOCK_LENGTH;
+        }
+
+        if ((buf.readableBytes() >= length || buf.readableBytes() % ACK_LENGTH == 0)
+                && (buf != currentBuffer || buf.readableBytes() > acknowledgedBytes)) {
+            sendResponse(channel);
+            currentBuffer = buf;
+            acknowledgedBytes = buf.readableBytes();
+        }
+
+        if (buf.readableBytes() >= length) {
+            return buf.readRetainedSlice(length);
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/At2000Protocol.java b/src/main/java/org/traccar/protocol/At2000Protocol.java
new file mode 100644
index 000000000..5894f3eab
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/At2000Protocol.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class At2000Protocol extends BaseProtocol {
+
+    public At2000Protocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new At2000FrameDecoder());
+                pipeline.addLast(new At2000ProtocolDecoder(At2000Protocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/At2000ProtocolDecoder.java b/src/main/java/org/traccar/protocol/At2000ProtocolDecoder.java
new file mode 100644
index 000000000..43798eb67
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/At2000ProtocolDecoder.java
@@ -0,0 +1,171 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.DataConverter;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import javax.crypto.Cipher;
+import javax.crypto.spec.IvParameterSpec;
+import javax.crypto.spec.SecretKeySpec;
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.Date;
+import java.util.LinkedList;
+import java.util.List;
+
+public class At2000ProtocolDecoder extends BaseProtocolDecoder {
+
+    private static final int BLOCK_LENGTH = 16;
+
+    public At2000ProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    public static final int MSG_ACKNOWLEDGEMENT = 0x00;
+    public static final int MSG_DEVICE_ID = 0x01;
+    public static final int MSG_TRACK_REQUEST = 0x88;
+    public static final int MSG_TRACK_RESPONSE = 0x89;
+    public static final int MSG_SESSION_END = 0x0c;
+
+    private Cipher cipher;
+
+    private static void sendRequest(Channel channel) {
+        if (channel != null) {
+            ByteBuf response = Unpooled.buffer(BLOCK_LENGTH);
+            response.writeByte(MSG_TRACK_REQUEST);
+            response.writeMedium(0);
+            response.writerIndex(BLOCK_LENGTH);
+            channel.writeAndFlush(new NetworkMessage(response, channel.remoteAddress()));
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        if (buf.getUnsignedByte(buf.readerIndex()) == 0x01) {
+            buf.readUnsignedByte(); // codec id
+        }
+
+        int type = buf.readUnsignedByte();
+        buf.readUnsignedMediumLE(); // length
+        buf.skipBytes(BLOCK_LENGTH - 1 - 3);
+
+        if (type == MSG_DEVICE_ID) {
+
+            String imei = buf.readSlice(15).toString(StandardCharsets.US_ASCII);
+            if (getDeviceSession(channel, remoteAddress, imei) != null) {
+
+                byte[] iv = new byte[BLOCK_LENGTH];
+                buf.readBytes(iv);
+                IvParameterSpec ivSpec = new IvParameterSpec(iv);
+
+                SecretKeySpec keySpec = new SecretKeySpec(
+                        DataConverter.parseHex("000102030405060708090a0b0c0d0e0f"), "AES");
+
+                cipher = Cipher.getInstance("AES/CBC/NoPadding");
+                cipher.init(Cipher.DECRYPT_MODE, keySpec, ivSpec);
+
+                byte[] data = new byte[BLOCK_LENGTH];
+                buf.readBytes(data);
+                cipher.update(data);
+
+            }
+
+        } else if (type == MSG_TRACK_RESPONSE) {
+
+            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+            if (deviceSession == null) {
+                return null;
+            }
+
+            if (buf.capacity() <= BLOCK_LENGTH) {
+                return null; // empty message
+            }
+
+            List<Position> positions = new LinkedList<>();
+
+            byte[] data = new byte[buf.capacity() - BLOCK_LENGTH];
+            buf.readBytes(data);
+            buf = Unpooled.wrappedBuffer(cipher.update(data));
+            try {
+                while (buf.readableBytes() >= 63) {
+
+                    Position position = new Position(getProtocolName());
+                    position.setDeviceId(deviceSession.getDeviceId());
+
+                    buf.readUnsignedShortLE(); // index
+                    buf.readUnsignedShortLE(); // reserved
+
+                    position.setValid(true);
+
+                    position.setTime(new Date(buf.readLongLE() * 1000));
+
+                    position.setLatitude(buf.readFloatLE());
+                    position.setLongitude(buf.readFloatLE());
+                    position.setAltitude(buf.readFloatLE());
+                    position.setSpeed(UnitsConverter.knotsFromKph(buf.readFloatLE()));
+                    position.setCourse(buf.readFloatLE());
+
+                    buf.readUnsignedIntLE(); // geozone event
+                    buf.readUnsignedIntLE(); // io events
+                    buf.readUnsignedIntLE(); // geozone value
+                    buf.readUnsignedIntLE(); // io values
+                    buf.readUnsignedShortLE(); // operator
+
+                    position.set(Position.PREFIX_ADC + 1, buf.readUnsignedShortLE());
+                    position.set(Position.PREFIX_ADC + 1, buf.readUnsignedShortLE());
+
+                    position.set(Position.KEY_POWER, buf.readUnsignedShortLE() * 0.001);
+
+                    buf.readUnsignedShortLE(); // cid
+                    position.set(Position.KEY_RSSI, buf.readUnsignedByte());
+                    buf.readUnsignedByte(); // current profile
+
+                    position.set(Position.KEY_BATTERY, buf.readUnsignedByte());
+                    position.set(Position.PREFIX_TEMP + 1, buf.readUnsignedByte());
+                    position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
+
+                    positions.add(position);
+
+                }
+            } finally {
+                buf.release();
+            }
+
+            return positions;
+
+        }
+
+        if (type == MSG_DEVICE_ID) {
+            sendRequest(channel);
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/AtrackFrameDecoder.java b/src/main/java/org/traccar/protocol/AtrackFrameDecoder.java
new file mode 100644
index 000000000..f071e2d97
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/AtrackFrameDecoder.java
@@ -0,0 +1,80 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+import org.traccar.BaseFrameDecoder;
+import org.traccar.helper.BufferUtil;
+
+import java.nio.charset.StandardCharsets;
+
+public class AtrackFrameDecoder extends BaseFrameDecoder {
+
+    private static final int KEEPALIVE_LENGTH = 12;
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+        if (buf.readableBytes() >= 2) {
+
+            if (buf.getUnsignedShort(buf.readerIndex()) == 0xfe02) {
+
+                if (buf.readableBytes() >= KEEPALIVE_LENGTH) {
+                    return buf.readRetainedSlice(KEEPALIVE_LENGTH);
+                }
+
+            } else if (buf.getUnsignedShort(buf.readerIndex()) == 0x4050 && buf.getByte(buf.readerIndex() + 2) != ',') {
+
+                if (buf.readableBytes() > 6) {
+                    int length = buf.getUnsignedShort(buf.readerIndex() + 4) + 4 + 2;
+                    if (buf.readableBytes() >= length) {
+                        return buf.readRetainedSlice(length);
+                    }
+                }
+
+            } else {
+
+                int lengthStart = buf.indexOf(buf.readerIndex() + 3, buf.writerIndex(), (byte) ',') + 1;
+                if (lengthStart > 0) {
+                    int lengthEnd = buf.indexOf(lengthStart, buf.writerIndex(), (byte) ',');
+                    if (lengthEnd > 0) {
+                        int length = lengthEnd + Integer.parseInt(buf.toString(
+                                lengthStart, lengthEnd - lengthStart, StandardCharsets.US_ASCII));
+                        if (buf.readableBytes() > length && buf.getByte(buf.readerIndex() + length) == '\n') {
+                            length += 1;
+                        }
+                        if (buf.readableBytes() >= length) {
+                            return buf.readRetainedSlice(length);
+                        }
+                    }
+                } else {
+                    int endIndex = BufferUtil.indexOf("\r\n", buf);
+                    if (endIndex > 0) {
+                        return buf.readRetainedSlice(endIndex - buf.readerIndex() + 2);
+                    }
+                }
+
+            }
+
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/AtrackProtocol.java b/src/main/java/org/traccar/protocol/AtrackProtocol.java
new file mode 100644
index 000000000..8e5cfe9ff
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/AtrackProtocol.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+import org.traccar.model.Command;
+
+public class AtrackProtocol extends BaseProtocol {
+
+    public AtrackProtocol() {
+        setSupportedDataCommands(
+                Command.TYPE_CUSTOM);
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new AtrackFrameDecoder());
+                pipeline.addLast(new AtrackProtocolEncoder());
+                pipeline.addLast(new AtrackProtocolDecoder(AtrackProtocol.this));
+            }
+        });
+        addServer(new TrackerServer(true, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new AtrackProtocolEncoder());
+                pipeline.addLast(new AtrackProtocolDecoder(AtrackProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/AtrackProtocolDecoder.java b/src/main/java/org/traccar/protocol/AtrackProtocolDecoder.java
new file mode 100644
index 000000000..71bb6791c
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/AtrackProtocolDecoder.java
@@ -0,0 +1,586 @@
+/*
+ * Copyright 2013 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.Context;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.CellTower;
+import org.traccar.model.Network;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.text.DateFormat;
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.HashMap;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
+import java.util.TimeZone;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class AtrackProtocolDecoder extends BaseProtocolDecoder {
+
+    private static final int MIN_DATA_LENGTH = 40;
+
+    private boolean longDate;
+    private boolean decimalFuel;
+    private boolean custom;
+    private String form;
+
+    private final Map<Integer, String> alarmMap = new HashMap<>();
+
+    public AtrackProtocolDecoder(Protocol protocol) {
+        super(protocol);
+
+        longDate = Context.getConfig().getBoolean(getProtocolName() + ".longDate");
+        decimalFuel = Context.getConfig().getBoolean(getProtocolName() + ".decimalFuel");
+
+        custom = Context.getConfig().getBoolean(getProtocolName() + ".custom");
+        form = Context.getConfig().getString(getProtocolName() + ".form");
+        if (form != null) {
+            custom = true;
+        }
+
+        for (String pair : Context.getConfig().getString(getProtocolName() + ".alarmMap", "").split(",")) {
+            if (!pair.isEmpty()) {
+                alarmMap.put(
+                        Integer.parseInt(pair.substring(0, pair.indexOf('='))), pair.substring(pair.indexOf('=') + 1));
+            }
+        }
+    }
+
+    public void setLongDate(boolean longDate) {
+        this.longDate = longDate;
+    }
+
+    public void setCustom(boolean custom) {
+        this.custom = custom;
+    }
+
+    private static void sendResponse(Channel channel, SocketAddress remoteAddress, long rawId, int index) {
+        if (channel != null) {
+            ByteBuf response = Unpooled.buffer(12);
+            response.writeShort(0xfe02);
+            response.writeLong(rawId);
+            response.writeShort(index);
+            channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
+        }
+    }
+
+    private static String readString(ByteBuf buf) {
+        String result = null;
+        int index = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) 0);
+        if (index > buf.readerIndex()) {
+            result = buf.readSlice(index - buf.readerIndex()).toString(StandardCharsets.US_ASCII);
+        }
+        buf.readByte();
+        return result;
+    }
+
+    private void readTextCustomData(Position position, String data, String form) {
+        CellTower cellTower = new CellTower();
+        String[] keys = form.substring(1).split("%");
+        String[] values = data.split(",|\r\n");
+        for (int i = 0; i < Math.min(keys.length, values.length); i++) {
+            switch (keys[i]) {
+                case "SA":
+                    position.set(Position.KEY_SATELLITES, Integer.parseInt(values[i]));
+                    break;
+                case "MV":
+                    position.set(Position.KEY_POWER, Integer.parseInt(values[i]) * 0.1);
+                    break;
+                case "BV":
+                    position.set(Position.KEY_BATTERY, Integer.parseInt(values[i]) * 0.1);
+                    break;
+                case "GQ":
+                    cellTower.setSignalStrength(Integer.parseInt(values[i]));
+                    break;
+                case "CE":
+                    cellTower.setCellId(Long.parseLong(values[i]));
+                    break;
+                case "LC":
+                    cellTower.setLocationAreaCode(Integer.parseInt(values[i]));
+                    break;
+                case "CN":
+                    if (values[i].length() > 3) {
+                        cellTower.setMobileCountryCode(Integer.parseInt(values[i].substring(0, 3)));
+                        cellTower.setMobileNetworkCode(Integer.parseInt(values[i].substring(3)));
+                    }
+                    break;
+                case "PC":
+                    position.set(Position.PREFIX_COUNT + 1, Integer.parseInt(values[i]));
+                    break;
+                case "AT":
+                    position.setAltitude(Integer.parseInt(values[i]));
+                    break;
+                case "RP":
+                    position.set(Position.KEY_RPM, Integer.parseInt(values[i]));
+                    break;
+                case "GS":
+                    position.set(Position.KEY_RSSI, Integer.parseInt(values[i]));
+                    break;
+                case "DT":
+                    position.set(Position.KEY_ARCHIVE, Integer.parseInt(values[i]) == 1);
+                    break;
+                case "VN":
+                    position.set(Position.KEY_VIN, values[i]);
+                    break;
+                case "TR":
+                    position.set(Position.KEY_THROTTLE, Integer.parseInt(values[i]));
+                    break;
+                case "ET":
+                    position.set(Position.PREFIX_TEMP + 1, Integer.parseInt(values[i]));
+                    break;
+                case "FL":
+                    position.set(Position.KEY_FUEL_LEVEL, Integer.parseInt(values[i]));
+                    break;
+                case "FC":
+                    position.set(Position.KEY_FUEL_CONSUMPTION, Integer.parseInt(values[i]));
+                    break;
+                case "AV1":
+                    position.set(Position.PREFIX_ADC + 1, Integer.parseInt(values[i]));
+                    break;
+                default:
+                    break;
+            }
+        }
+
+        if (cellTower.getMobileCountryCode() != null
+                && cellTower.getMobileNetworkCode() != null
+                && cellTower.getCellId() != null
+                && cellTower.getLocationAreaCode() != null) {
+            position.setNetwork(new Network(cellTower));
+        } else if (cellTower.getSignalStrength() != null) {
+            position.set(Position.KEY_RSSI, cellTower.getSignalStrength());
+        }
+    }
+
+    private void readBinaryCustomData(Position position, ByteBuf buf, String form) {
+        CellTower cellTower = new CellTower();
+        String[] keys = form.substring(1).split("%");
+        for (String key : keys) {
+            switch (key) {
+                case "SA":
+                    position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
+                    break;
+                case "MV":
+                    position.set(Position.KEY_POWER, buf.readUnsignedShort() * 0.1);
+                    break;
+                case "BV":
+                    position.set(Position.KEY_BATTERY, buf.readUnsignedShort() * 0.1);
+                    break;
+                case "GQ":
+                    cellTower.setSignalStrength((int) buf.readUnsignedByte());
+                    break;
+                case "CE":
+                    cellTower.setCellId(buf.readUnsignedInt());
+                    break;
+                case "LC":
+                    cellTower.setLocationAreaCode(buf.readUnsignedShort());
+                    break;
+                case "CN":
+                    int combinedMobileCodes = (int) (buf.readUnsignedInt() % 100000); // cccnn
+                    cellTower.setMobileCountryCode(combinedMobileCodes / 100);
+                    cellTower.setMobileNetworkCode(combinedMobileCodes % 100);
+                    break;
+                case "RL":
+                    buf.readUnsignedByte(); // rxlev
+                    break;
+                case "PC":
+                    position.set(Position.PREFIX_COUNT + 1, buf.readUnsignedInt());
+                    break;
+                case "AT":
+                    position.setAltitude(buf.readUnsignedInt());
+                    break;
+                case "RP":
+                    position.set(Position.KEY_RPM, buf.readUnsignedShort());
+                    break;
+                case "GS":
+                    position.set(Position.KEY_RSSI, buf.readUnsignedByte());
+                    break;
+                case "DT":
+                    position.set(Position.KEY_ARCHIVE, buf.readUnsignedByte() == 1);
+                    break;
+                case "VN":
+                    position.set(Position.KEY_VIN, readString(buf));
+                    break;
+                case "MF":
+                    buf.readUnsignedShort(); // mass air flow rate
+                    break;
+                case "EL":
+                    buf.readUnsignedByte(); // engine load
+                    break;
+                case "TR":
+                    position.set(Position.KEY_THROTTLE, buf.readUnsignedByte());
+                    break;
+                case "ET":
+                    position.set(Position.PREFIX_TEMP + 1, buf.readUnsignedShort());
+                    break;
+                case "FL":
+                    position.set(Position.KEY_FUEL_LEVEL, buf.readUnsignedByte());
+                    break;
+                case "ML":
+                    buf.readUnsignedByte(); // mil status
+                    break;
+                case "FC":
+                    position.set(Position.KEY_FUEL_CONSUMPTION, buf.readUnsignedInt());
+                    break;
+                case "CI":
+                    readString(buf); // format string
+                    break;
+                case "AV1":
+                    position.set(Position.PREFIX_ADC + 1, buf.readUnsignedShort());
+                    break;
+                case "NC":
+                    readString(buf); // gsm neighbor cell info
+                    break;
+                case "SM":
+                    buf.readUnsignedShort(); // max speed between reports
+                    break;
+                case "GL":
+                    readString(buf); // google link
+                    break;
+                case "MA":
+                    readString(buf); // mac address
+                    break;
+                case "PD":
+                    buf.readUnsignedByte(); // pending code status
+                    break;
+                case "CD":
+                    readString(buf); // sim cid
+                    break;
+                case "CM":
+                    buf.readLong(); // imsi
+                    break;
+                case "GN":
+                    buf.skipBytes(60); // g sensor data
+                    break;
+                case "GV":
+                    buf.skipBytes(6); // maximum g force
+                    break;
+                case "ME":
+                    buf.readLong(); // imei
+                    break;
+                case "IA":
+                    buf.readUnsignedByte(); // intake air temperature
+                    break;
+                case "MP":
+                    buf.readUnsignedByte(); // manifold absolute pressure
+                    break;
+                default:
+                    break;
+            }
+        }
+
+        if (cellTower.getMobileCountryCode() != null
+            && cellTower.getMobileNetworkCode() != null
+            && cellTower.getCellId() != null && cellTower.getCellId() != 0
+            && cellTower.getLocationAreaCode() != null) {
+            position.setNetwork(new Network(cellTower));
+        } else if (cellTower.getSignalStrength() != null) {
+            position.set(Position.KEY_RSSI, cellTower.getSignalStrength());
+        }
+    }
+
+    private static final Pattern PATTERN_INFO = new PatternBuilder()
+            .text("$INFO=")
+            .number("(d+),")                     // unit id
+            .expression("([^,]+),")              // model
+            .expression("([^,]+),")              // firmware version
+            .number("d+,")                       // imei
+            .number("d+,")                       // imsi
+            .number("d+,")                       // sim card id
+            .number("(d+),")                     // power
+            .number("(d+),")                     // battery
+            .number("(d+),")                     // satellites
+            .number("d+,")                       // gsm status
+            .number("(d+),")                     // rssi
+            .number("d+,")                       // connection status
+            .number("d+")                        // antenna status
+            .any()
+            .compile();
+
+    private Position decodeInfo(Channel channel, SocketAddress remoteAddress, String sentence) {
+
+        Position position = new Position(getProtocolName());
+
+        getLastLocation(position, null);
+
+        DeviceSession deviceSession;
+
+        if (sentence.startsWith("$INFO")) {
+
+            Parser parser = new Parser(PATTERN_INFO, sentence);
+            if (!parser.matches()) {
+                return null;
+            }
+
+            deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+
+            position.set("model", parser.next());
+            position.set(Position.KEY_VERSION_FW, parser.next());
+            position.set(Position.KEY_POWER, parser.nextInt() * 0.1);
+            position.set(Position.KEY_BATTERY, parser.nextInt() * 0.1);
+            position.set(Position.KEY_SATELLITES, parser.nextInt());
+            position.set(Position.KEY_RSSI, parser.nextInt());
+
+        } else {
+
+            deviceSession = getDeviceSession(channel, remoteAddress);
+
+            position.set(Position.KEY_RESULT, sentence);
+
+        }
+
+        if (deviceSession == null) {
+            return null;
+        } else {
+            position.setDeviceId(deviceSession.getDeviceId());
+            return position;
+        }
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .number("(d+),")                     // date and time
+            .number("d+,")                       // rtc date and time
+            .number("d+,")                       // device date and time
+            .number("(-?d+),")                   // longitude
+            .number("(-?d+),")                   // latitude
+            .number("(d+),")                     // course
+            .number("(d+),")                     // report id
+            .number("(d+.?d*),")                 // odometer
+            .number("(d+),")                     // hdop
+            .number("(d+),")                     // inputs
+            .number("(d+),")                     // speed
+            .number("(d+),")                     // outputs
+            .number("(d+),")                     // adc
+            .number("([^,]+)?,")                 // driver
+            .number("(d+),")                     // temp1
+            .number("(d+),")                     // temp2
+            .expression("[^,]*,")                // text message
+            .expression("(.*)")                  // custom data
+            .optional(2)
+            .compile();
+
+    private List<Position> decodeText(Channel channel, SocketAddress remoteAddress, String sentence) {
+
+        int startIndex = 0;
+        for (int i = 0; i < 4; i++) {
+            startIndex = sentence.indexOf(',', startIndex + 1);
+        }
+        int endIndex = sentence.indexOf(',', startIndex + 1);
+
+        String imei = sentence.substring(startIndex + 1, endIndex);
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        List<Position> positions = new LinkedList<>();
+        String[] lines = sentence.substring(endIndex + 1).split("\r\n");
+
+        for (String line : lines) {
+            Position position = decodeTextLine(deviceSession, line);
+            if (position != null) {
+                positions.add(position);
+            }
+        }
+
+        return positions;
+    }
+
+
+    private Position decodeTextLine(DeviceSession deviceSession, String sentence) {
+
+        Parser parser = new Parser(PATTERN, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setValid(true);
+
+        String time = parser.next();
+        if (time.length() >= 14) {
+            try {
+                DateFormat dateFormat = new SimpleDateFormat("yyyyMMddHHmmss");
+                dateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
+                position.setTime(dateFormat.parse(time));
+            } catch (ParseException e) {
+                throw new RuntimeException(e);
+            }
+        } else {
+            position.setTime(new Date(Long.parseLong(time) * 1000));
+        }
+
+        position.setLongitude(parser.nextInt() * 0.000001);
+        position.setLatitude(parser.nextInt() * 0.000001);
+        position.setCourse(parser.nextInt());
+
+        position.set(Position.KEY_EVENT, parser.nextInt());
+        position.set(Position.KEY_ODOMETER, parser.nextDouble() * 100);
+        position.set(Position.KEY_HDOP, parser.nextInt() * 0.1);
+        position.set(Position.KEY_INPUT, parser.nextInt());
+
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextInt()));
+
+        position.set(Position.KEY_OUTPUT, parser.nextInt());
+        position.set(Position.PREFIX_ADC + 1, parser.nextInt());
+
+        if (parser.hasNext()) {
+            position.set(Position.KEY_DRIVER_UNIQUE_ID, parser.next());
+        }
+
+        position.set(Position.PREFIX_TEMP + 1, parser.nextInt());
+        position.set(Position.PREFIX_TEMP + 2, parser.nextInt());
+
+        if (custom) {
+            String data = parser.next();
+            String form = this.form;
+            if (form == null) {
+                form = data.substring(0, data.indexOf(',')).substring("%CI".length());
+                data = data.substring(data.indexOf(',') + 1);
+            }
+            readTextCustomData(position, data, form);
+        }
+
+        return position;
+    }
+
+    private List<Position> decodeBinary(Channel channel, SocketAddress remoteAddress, ByteBuf buf) {
+
+        buf.skipBytes(2); // prefix
+        buf.readUnsignedShort(); // checksum
+        buf.readUnsignedShort(); // length
+        int index = buf.readUnsignedShort();
+
+        long id = buf.readLong();
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, String.valueOf(id));
+        if (deviceSession == null) {
+            return null;
+        }
+
+        sendResponse(channel, remoteAddress, id, index);
+
+        List<Position> positions = new LinkedList<>();
+
+        while (buf.readableBytes() >= MIN_DATA_LENGTH) {
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            if (longDate) {
+
+                DateBuilder dateBuilder = new DateBuilder()
+                        .setDate(buf.readUnsignedShort(), buf.readUnsignedByte(), buf.readUnsignedByte())
+                        .setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte());
+                position.setTime(dateBuilder.getDate());
+
+                buf.skipBytes(7 + 7);
+
+            } else {
+                position.setFixTime(new Date(buf.readUnsignedInt() * 1000));
+                position.setDeviceTime(new Date(buf.readUnsignedInt() * 1000));
+                buf.readUnsignedInt(); // send time
+            }
+
+            position.setValid(true);
+            position.setLongitude(buf.readInt() * 0.000001);
+            position.setLatitude(buf.readInt() * 0.000001);
+            position.setCourse(buf.readUnsignedShort());
+
+            int type = buf.readUnsignedByte();
+            position.set(Position.KEY_TYPE, type);
+            position.set(Position.KEY_ALARM, alarmMap.get(type));
+
+            position.set(Position.KEY_ODOMETER, buf.readUnsignedInt() * 100);
+            position.set(Position.KEY_HDOP, buf.readUnsignedShort() * 0.1);
+            position.set(Position.KEY_INPUT, buf.readUnsignedByte());
+
+            position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShort()));
+
+            position.set(Position.KEY_OUTPUT, buf.readUnsignedByte());
+            position.set(Position.PREFIX_ADC + 1, buf.readUnsignedShort() * 0.001);
+
+            position.set(Position.KEY_DRIVER_UNIQUE_ID, readString(buf));
+
+            position.set(Position.PREFIX_TEMP + 1, buf.readShort() * 0.1);
+            position.set(Position.PREFIX_TEMP + 2, buf.readShort() * 0.1);
+
+            String message = readString(buf);
+            if (message != null && !message.isEmpty()) {
+                Pattern pattern = Pattern.compile("FULS:F=(\\p{XDigit}+) t=(\\p{XDigit}+) N=(\\p{XDigit}+)");
+                Matcher matcher = pattern.matcher(message);
+                if (matcher.find()) {
+                    int value = Integer.parseInt(matcher.group(3), decimalFuel ? 10 : 16);
+                    position.set(Position.KEY_FUEL_LEVEL, value * 0.1);
+                } else {
+                    position.set("message", message);
+                }
+            }
+
+            if (custom) {
+                String form = this.form;
+                if (form == null) {
+                    form = readString(buf).trim().substring("%CI".length());
+                }
+                readBinaryCustomData(position, buf, form);
+            }
+
+            positions.add(position);
+
+        }
+
+        return positions;
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        if (buf.getUnsignedShort(buf.readerIndex()) == 0xfe02) {
+            if (channel != null) {
+                channel.writeAndFlush(new NetworkMessage(buf.retain(), remoteAddress)); // keep-alive message
+            }
+            return null;
+        } else if (buf.getByte(buf.readerIndex()) == '$') {
+            return decodeInfo(channel, remoteAddress, buf.toString(StandardCharsets.US_ASCII).trim());
+        } else if (buf.getByte(buf.readerIndex() + 2) == ',') {
+            return decodeText(channel, remoteAddress, buf.toString(StandardCharsets.US_ASCII).trim());
+        } else {
+            return decodeBinary(channel, remoteAddress, buf);
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/AtrackProtocolEncoder.java b/src/main/java/org/traccar/protocol/AtrackProtocolEncoder.java
new file mode 100644
index 000000000..1e085cb26
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/AtrackProtocolEncoder.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.Unpooled;
+import org.traccar.BaseProtocolEncoder;
+import org.traccar.model.Command;
+
+import java.nio.charset.StandardCharsets;
+
+public class AtrackProtocolEncoder extends BaseProtocolEncoder {
+
+    @Override
+    protected Object encodeCommand(Command command) {
+
+        switch (command.getType()) {
+            case Command.TYPE_CUSTOM:
+                return Unpooled.copiedBuffer(
+                        command.getString(Command.KEY_DATA) + "\r\n", StandardCharsets.US_ASCII);
+            default:
+                return null;
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/AuroProtocol.java b/src/main/java/org/traccar/protocol/AuroProtocol.java
new file mode 100644
index 000000000..b8ebdaa75
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/AuroProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LineBasedFrameDecoder;
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class AuroProtocol extends BaseProtocol {
+
+    public AuroProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LineBasedFrameDecoder(1024));
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new AuroProtocolDecoder(AuroProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/AuroProtocolDecoder.java b/src/main/java/org/traccar/protocol/AuroProtocolDecoder.java
new file mode 100644
index 000000000..d7916147b
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/AuroProtocolDecoder.java
@@ -0,0 +1,91 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class AuroProtocolDecoder extends BaseProtocolDecoder {
+
+    public AuroProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .number("M(dddd)")                   // index
+            .number("Td+")                       // phone
+            .number("I(d+)")                     // imei
+            .number("Ed+W")
+            .text("*****")
+            .number("d{8}d{4}")                  // local time
+            .expression(".{8}#.{8}")
+            .number("d{10}")                     // status
+            .number("([-+])(ddd)(dd)(dddd)")     // longitude
+            .number("([-+])(ddd)(dd)(dddd)")     // latitude
+            .number("(dd)(dd)(dddd)")            // date (ddmmyyyy)
+            .number("(dd)(dd)(dd)")              // time (hhmmss)
+            .number("(ddd)")                     // course
+            .number("d{6}")
+            .number("(ddd)")                     // speed
+            .number("d")
+            .number("(dd)")                      // battery
+            .expression("([01])")                // charging
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+
+        position.set(Position.KEY_INDEX, parser.nextInt(0));
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setValid(true);
+        position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN_MIN));
+        position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN_MIN));
+
+        position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
+
+        position.setCourse(parser.nextDouble(0));
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
+
+        position.set(Position.KEY_BATTERY, parser.nextInt(0));
+        position.set(Position.KEY_CHARGE, parser.nextInt(0) == 1);
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/AustinNbProtocol.java b/src/main/java/org/traccar/protocol/AustinNbProtocol.java
new file mode 100644
index 000000000..32bfc0aae
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/AustinNbProtocol.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class AustinNbProtocol extends BaseProtocol {
+
+    public AustinNbProtocol() {
+        addServer(new TrackerServer(true, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new AustinNbProtocolDecoder(AustinNbProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/AustinNbProtocolDecoder.java b/src/main/java/org/traccar/protocol/AustinNbProtocolDecoder.java
new file mode 100644
index 000000000..dc6f3d280
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/AustinNbProtocolDecoder.java
@@ -0,0 +1,81 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.TimeZone;
+import java.util.regex.Pattern;
+
+public class AustinNbProtocolDecoder extends BaseProtocolDecoder {
+
+    public AustinNbProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .number("(d+);")                     // imei
+            .number("(dddd)-(dd)-(dd) ")         // date
+            .number("(dd):(dd):(dd);")           // time
+            .number("(-?d+,d+);")                // latitude
+            .number("(-?d+,d+);")                // longitude
+            .number("(d+);")                     // azimuth
+            .number("(d+);")                     // angle
+            .number("(d+);")                     // range
+            .number("(d+);")                     // out of range
+            .expression("(.*)")                  // operator
+            .any()
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setTime(parser.nextDateTime(Parser.DateTimeFormat.YMD_HMS, TimeZone.getDefault().getID()));
+
+        position.setValid(true);
+        position.setLatitude(Double.parseDouble(parser.next().replace(',', '.')));
+        position.setLongitude(Double.parseDouble(parser.next().replace(',', '.')));
+        position.setCourse(parser.nextInt());
+        position.set("angle", parser.nextInt());
+        position.set("range", parser.nextInt());
+        position.set("outOfRange", parser.nextInt());
+        position.set("carrier", parser.next());
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/AutoFonFrameDecoder.java b/src/main/java/org/traccar/protocol/AutoFonFrameDecoder.java
new file mode 100644
index 000000000..69f28133f
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/AutoFonFrameDecoder.java
@@ -0,0 +1,65 @@
+/*
+ * Copyright 2015 - 2016 Anton Tananaev (anton@traccar.org)
+ * Copyright 2015 Vitaly Litvak (vitavaque@gmail.com)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+import org.traccar.BaseFrameDecoder;
+
+public class AutoFonFrameDecoder extends BaseFrameDecoder {
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+        // Check minimum length
+        if (buf.readableBytes() < 12) {
+            return null;
+        }
+
+        int length;
+        switch (buf.getUnsignedByte(buf.readerIndex())) {
+            case AutoFonProtocolDecoder.MSG_LOGIN:
+                length = 12;
+                break;
+            case AutoFonProtocolDecoder.MSG_LOCATION:
+                length = 78;
+                break;
+            case AutoFonProtocolDecoder.MSG_HISTORY:
+                length = 257;
+                break;
+            case AutoFonProtocolDecoder.MSG_45_LOGIN:
+                length = 19;
+                break;
+            case AutoFonProtocolDecoder.MSG_45_LOCATION:
+                length = 34;
+                break;
+            default:
+                length = 0;
+                break;
+        }
+
+        // Check length and return buffer
+        if (length != 0 && buf.readableBytes() >= length) {
+            return buf.readRetainedSlice(length);
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/AutoFonProtocol.java b/src/main/java/org/traccar/protocol/AutoFonProtocol.java
new file mode 100644
index 000000000..08b5edc7d
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/AutoFonProtocol.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class AutoFonProtocol extends BaseProtocol {
+
+    public AutoFonProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new AutoFonFrameDecoder());
+                pipeline.addLast(new AutoFonProtocolDecoder(AutoFonProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/AutoFonProtocolDecoder.java b/src/main/java/org/traccar/protocol/AutoFonProtocolDecoder.java
new file mode 100644
index 000000000..aa05ca2d7
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/AutoFonProtocolDecoder.java
@@ -0,0 +1,215 @@
+/*
+ * Copyright 2015 - 2016 Anton Tananaev (anton@traccar.org)
+ * Copyright 2015 Vitaly Litvak (vitavaque@gmail.com)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.ByteBufUtil;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.DateBuilder;
+import org.traccar.model.CellTower;
+import org.traccar.model.Network;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.LinkedList;
+import java.util.List;
+
+public class AutoFonProtocolDecoder extends BaseProtocolDecoder {
+
+    public AutoFonProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    public static final int MSG_LOGIN = 0x10;
+    public static final int MSG_LOCATION = 0x11;
+    public static final int MSG_HISTORY = 0x12;
+
+    public static final int MSG_45_LOGIN = 0x41;
+    public static final int MSG_45_LOCATION = 0x02;
+
+    private static double convertCoordinate(int raw) {
+        int degrees = raw / 1000000;
+        double minutes = (raw % 1000000) / 10000.0;
+        return degrees + minutes / 60;
+    }
+
+    private static double convertCoordinate(short degrees, int minutes) {
+        double value = degrees + BitUtil.from(minutes, 4) / 600000.0;
+        if (BitUtil.check(minutes, 0)) {
+            return value;
+        } else {
+            return -value;
+        }
+    }
+
+    private Position decodePosition(DeviceSession deviceSession, ByteBuf buf, boolean history) {
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        if (!history) {
+            buf.readUnsignedByte(); // interval
+            buf.skipBytes(8); // settings
+        }
+        position.set(Position.KEY_STATUS, buf.readUnsignedByte());
+        if (!history) {
+            buf.readUnsignedShort();
+        }
+        position.set(Position.KEY_BATTERY, buf.readUnsignedByte());
+        buf.skipBytes(6); // time
+
+        if (!history) {
+            for (int i = 0; i < 2; i++) {
+                buf.skipBytes(5); // time
+                buf.readUnsignedShort(); // interval
+                buf.skipBytes(5); // mode
+            }
+        }
+
+        position.set(Position.PREFIX_TEMP + 1, buf.readByte());
+
+        int rssi = buf.readUnsignedByte();
+        CellTower cellTower = CellTower.from(
+                buf.readUnsignedShort(), buf.readUnsignedShort(),
+                buf.readUnsignedShort(), buf.readUnsignedShort(), rssi);
+        position.setNetwork(new Network(cellTower));
+
+        int valid = buf.readUnsignedByte();
+        position.setValid((valid & 0xc0) != 0);
+        position.set(Position.KEY_SATELLITES, valid & 0x3f);
+
+        DateBuilder dateBuilder = new DateBuilder()
+                .setDateReverse(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte())
+                .setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte());
+        position.setTime(dateBuilder.getDate());
+
+        position.setLatitude(convertCoordinate(buf.readInt()));
+        position.setLongitude(convertCoordinate(buf.readInt()));
+        position.setAltitude(buf.readShort());
+        position.setSpeed(buf.readUnsignedByte());
+        position.setCourse(buf.readUnsignedByte() * 2.0);
+
+        position.set(Position.KEY_HDOP, buf.readUnsignedShort());
+
+        buf.readUnsignedShort(); // reserved
+        buf.readUnsignedByte(); // checksum
+        return position;
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        int type = buf.readUnsignedByte();
+
+        if (type == MSG_LOGIN || type == MSG_45_LOGIN) {
+
+            if (type == MSG_LOGIN) {
+                buf.readUnsignedByte(); // hardware version
+                buf.readUnsignedByte(); // software version
+            }
+
+            String imei = ByteBufUtil.hexDump(buf.readSlice(8)).substring(1);
+            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
+
+            if (deviceSession != null && channel != null) {
+                ByteBuf response = Unpooled.buffer();
+                response.writeBytes("resp_crc=".getBytes(StandardCharsets.US_ASCII));
+                response.writeByte(buf.getByte(buf.writerIndex() - 1));
+                channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
+            }
+
+            return null;
+
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        if (type == MSG_LOCATION) {
+
+            return decodePosition(deviceSession, buf, false);
+
+        } else if (type == MSG_HISTORY) {
+
+            int count = buf.readUnsignedByte() & 0x0f;
+            buf.readUnsignedShort(); // total count
+            List<Position> positions = new LinkedList<>();
+
+            for (int i = 0; i < count; i++) {
+                positions.add(decodePosition(deviceSession, buf, true));
+            }
+
+            return positions;
+
+        } else if (type == MSG_45_LOCATION) {
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            short status = buf.readUnsignedByte();
+            if (BitUtil.check(status, 7)) {
+                position.set(Position.KEY_ALARM, Position.ALARM_GENERAL);
+            }
+            position.set(Position.KEY_BATTERY, BitUtil.to(status, 7));
+
+            buf.skipBytes(2); // remaining time
+
+            position.set(Position.PREFIX_TEMP + 1, buf.readByte());
+
+            buf.skipBytes(2); // timer (interval and units)
+            buf.readByte(); // mode
+            buf.readByte(); // gprs sending interval
+
+            buf.skipBytes(6); // mcc, mnc, lac, cid
+
+            int valid = buf.readUnsignedByte();
+            position.setValid(BitUtil.from(valid, 6) != 0);
+            position.set(Position.KEY_SATELLITES, BitUtil.from(valid, 6));
+
+            int time = buf.readUnsignedMedium();
+            int date = buf.readUnsignedMedium();
+
+            DateBuilder dateBuilder = new DateBuilder()
+                    .setTime(time / 10000, time / 100 % 100, time % 100)
+                    .setDateReverse(date / 10000, date / 100 % 100, date % 100);
+            position.setTime(dateBuilder.getDate());
+
+            position.setLatitude(convertCoordinate(buf.readUnsignedByte(), buf.readUnsignedMedium()));
+            position.setLongitude(convertCoordinate(buf.readUnsignedByte(), buf.readUnsignedMedium()));
+            position.setSpeed(buf.readUnsignedByte());
+            position.setCourse(buf.readUnsignedShort());
+
+            return position;
+
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/AutoGradeProtocol.java b/src/main/java/org/traccar/protocol/AutoGradeProtocol.java
new file mode 100644
index 000000000..c6dbb681e
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/AutoGradeProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.CharacterDelimiterFrameDecoder;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class AutoGradeProtocol extends BaseProtocol {
+
+    public AutoGradeProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, ')'));
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new AutoGradeProtocolDecoder(AutoGradeProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/AutoGradeProtocolDecoder.java b/src/main/java/org/traccar/protocol/AutoGradeProtocolDecoder.java
new file mode 100644
index 000000000..5052450b5
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/AutoGradeProtocolDecoder.java
@@ -0,0 +1,107 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class AutoGradeProtocolDecoder extends BaseProtocolDecoder {
+
+    public AutoGradeProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("(")
+            .number("d{12}")                     // index
+            .number("(d{15})")                   // imei
+            .number("(dd)(dd)(dd)")              // date (ddmmyy)
+            .expression("([AV])")                // validity
+            .number("(d+)(dd.d+)([NS])")         // latitude
+            .number("(d+)(dd.d+)([EW])")         // longitude
+            .number("([d.]{5})")                 // speed
+            .number("(dd)(dd)(dd)")              // time (hhmmss)
+            .number("([d.]{6})")                 // course
+            .expression("(.)")                   // status
+            .number("A(xxxx)")
+            .number("B(xxxx)")
+            .number("C(xxxx)")
+            .number("D(xxxx)")
+            .number("E(xxxx)")
+            .number("K(xxxx)")
+            .number("L(xxxx)")
+            .number("M(xxxx)")
+            .number("N(xxxx)")
+            .number("O(xxxx)")
+            .any()
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        DateBuilder dateBuilder = new DateBuilder()
+                .setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+
+        position.setValid(parser.next().equals("A"));
+        position.setLatitude(parser.nextCoordinate());
+        position.setLongitude(parser.nextCoordinate());
+        position.setSpeed(parser.nextDouble(0));
+
+        dateBuilder.setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+        position.setTime(dateBuilder.getDate());
+
+        position.setCourse(parser.nextDouble(0));
+
+        int status = parser.next().charAt(0);
+        position.set(Position.KEY_STATUS, status);
+        position.set(Position.KEY_IGNITION, BitUtil.check(status, 0));
+
+        for (int i = 1; i <= 5; i++) {
+            position.set(Position.PREFIX_ADC + i, parser.next());
+        }
+
+        for (int i = 1; i <= 5; i++) {
+            position.set("can" + i, parser.next());
+        }
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/AutoTrackProtocol.java b/src/main/java/org/traccar/protocol/AutoTrackProtocol.java
new file mode 100644
index 000000000..6aa7558bf
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/AutoTrackProtocol.java
@@ -0,0 +1,36 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LengthFieldBasedFrameDecoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+import java.nio.ByteOrder;
+public class AutoTrackProtocol extends BaseProtocol {
+
+    public AutoTrackProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LengthFieldBasedFrameDecoder(ByteOrder.LITTLE_ENDIAN, 1024, 5, 2, 2, 0, true));
+                pipeline.addLast(new AutoTrackProtocolDecoder(AutoTrackProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/AutoTrackProtocolDecoder.java b/src/main/java/org/traccar/protocol/AutoTrackProtocolDecoder.java
new file mode 100644
index 000000000..3c1fd256b
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/AutoTrackProtocolDecoder.java
@@ -0,0 +1,138 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.ByteBufUtil;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.Checksum;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.Date;
+
+public class AutoTrackProtocolDecoder extends BaseProtocolDecoder {
+
+    public AutoTrackProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    public static final int MSG_LOGIN_REQUEST = 51;
+    public static final int MSG_LOGIN_CONFIRM = 101;
+    public static final int MSG_TELEMETRY_1 = 52;
+    public static final int MSG_TELEMETRY_2 = 66;
+    public static final int MSG_TELEMETRY_3 = 67;
+    public static final int MSG_KEEP_ALIVE = 114;
+    public static final int MSG_TELEMETRY_CONFIRM = 123;
+
+    private Position decodeTelemetry(
+            Channel channel, SocketAddress remoteAddress, DeviceSession deviceSession, ByteBuf buf) {
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setTime(new Date(1009843200000L + buf.readUnsignedIntLE() * 1000)); // seconds since 2002
+        position.setLatitude(buf.readIntLE() * 0.0000001);
+        position.setLongitude(buf.readIntLE() * 0.0000001);
+
+        position.set(Position.KEY_ODOMETER, buf.readUnsignedIntLE());
+        position.set(Position.KEY_FUEL_USED, buf.readUnsignedIntLE());
+
+        position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShortLE()));
+        buf.readUnsignedShortLE(); // max speed
+
+        position.set(Position.KEY_INPUT, buf.readUnsignedShortLE());
+        buf.readUnsignedIntLE(); // di 3 count
+        buf.readUnsignedIntLE(); // di 4 count
+
+        for (int i = 0; i < 5; i++) {
+            position.set(Position.PREFIX_ADC + (i + 1), buf.readUnsignedShortLE());
+        }
+
+        position.setCourse(buf.readUnsignedShortLE());
+
+        position.set(Position.KEY_STATUS, buf.readUnsignedShortLE());
+        position.set(Position.KEY_EVENT, buf.readUnsignedShortLE());
+        position.set(Position.KEY_DRIVER_UNIQUE_ID, buf.readLongLE());
+
+        int index = buf.readUnsignedShortLE();
+
+        buf.readUnsignedShortLE(); // checksum
+
+        if (channel != null) {
+            ByteBuf response = Unpooled.buffer();
+            response.writeInt(0xF1F1F1F1); // sync
+            response.writeByte(MSG_TELEMETRY_CONFIRM);
+            response.writeShortLE(2); // length
+            response.writeShortLE(index);
+            response.writeShort(Checksum.crc16(Checksum.CRC16_XMODEM, response.nioBuffer()));
+            channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
+        }
+
+        return position;
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        buf.skipBytes(4); // sync
+        int type = buf.readUnsignedByte();
+        buf.readUnsignedShortLE(); // length
+
+        switch (type) {
+            case MSG_LOGIN_REQUEST:
+                String imei = ByteBufUtil.hexDump(buf.readBytes(8));
+                DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
+                if (deviceSession == null) {
+                    return null;
+                }
+                int fuelConst = buf.readUnsignedShortLE();
+                int tripConst = buf.readUnsignedShortLE();
+                if (channel != null) {
+                    ByteBuf response = Unpooled.buffer();
+                    response.writeInt(0xF1F1F1F1); // sync
+                    response.writeByte(MSG_LOGIN_CONFIRM);
+                    response.writeShortLE(12); // length
+                    response.writeBytes(ByteBufUtil.decodeHexDump(imei));
+                    response.writeShortLE(fuelConst);
+                    response.writeShortLE(tripConst);
+                    response.writeShort(Checksum.crc16(Checksum.CRC16_XMODEM, response.nioBuffer()));
+                    channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
+                }
+                return null;
+            case MSG_TELEMETRY_1:
+            case MSG_TELEMETRY_2:
+            case MSG_TELEMETRY_3:
+                deviceSession = getDeviceSession(channel, remoteAddress);
+                if (deviceSession == null) {
+                    return null;
+                }
+                return decodeTelemetry(channel, remoteAddress, deviceSession, buf);
+            default:
+                return null;
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/AvemaProtocol.java b/src/main/java/org/traccar/protocol/AvemaProtocol.java
new file mode 100644
index 000000000..dbfab4dea
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/AvemaProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LineBasedFrameDecoder;
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class AvemaProtocol extends BaseProtocol {
+
+    public AvemaProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LineBasedFrameDecoder(1024));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new AvemaProtocolDecoder(AvemaProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/AvemaProtocolDecoder.java b/src/main/java/org/traccar/protocol/AvemaProtocolDecoder.java
new file mode 100644
index 000000000..16a31162a
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/AvemaProtocolDecoder.java
@@ -0,0 +1,107 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.CellTower;
+import org.traccar.model.Network;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class AvemaProtocolDecoder extends BaseProtocolDecoder {
+
+    public AvemaProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .number("(d+),")                     // device id
+            .number("(dddd)(dd)(dd)")            // date (yyyymmdd)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .number("(-?d+.d+),")                // longitude
+            .number("(-?d+.d+),")                // latitude
+            .number("(d+),")                     // speed
+            .number("(d+),")                     // course
+            .number("(-?d+),")                   // altitude
+            .number("(d+),")                     // satellites
+            .number("(d+),")                     // event
+            .number("(d+.d+),")                  // odometer
+            .number("(d+),")                     // input
+            .number("(d+.d+)V,")                 // adc 1
+            .number("(d+.d+)V,")                 // adc 2
+            .number("(d+),")                     // output
+            .number("(d),")                      // roaming
+            .number("(d+),")                     // rssi
+            .number("d,")                        // communication system
+            .number("(ddd)")                     // mcc
+            .number("(dd),")                     // mnc
+            .number("(x+),")                     // lac
+            .number("(x+),")                     // cid
+            .number("([^,]+)?")                  // rfid
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setValid(true);
+        position.setTime(parser.nextDateTime());
+        position.setLongitude(parser.nextDouble());
+        position.setLatitude(parser.nextDouble());
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextInt()));
+        position.setCourse(parser.nextInt());
+        position.setAltitude(parser.nextInt());
+
+        position.set(Position.KEY_SATELLITES, parser.nextInt());
+        position.set(Position.KEY_EVENT, parser.nextInt());
+        position.set(Position.KEY_ODOMETER, parser.nextDouble() * 1000);
+        position.set(Position.KEY_INPUT, parser.nextInt());
+        position.set(Position.PREFIX_ADC + 1, parser.nextDouble());
+        position.set(Position.PREFIX_ADC + 2, parser.nextDouble());
+        position.set(Position.KEY_OUTPUT, parser.nextInt());
+        position.set(Position.KEY_ROAMING, parser.nextInt() == 1);
+
+        int rssi = parser.nextInt();
+        position.setNetwork(new Network(CellTower.from(
+                parser.nextInt(), parser.nextInt(), parser.nextHexInt(), parser.nextHexInt(), rssi)));
+
+        position.set(Position.KEY_DRIVER_UNIQUE_ID, parser.next());
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Avl301Protocol.java b/src/main/java/org/traccar/protocol/Avl301Protocol.java
new file mode 100644
index 000000000..71fc7cb26
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Avl301Protocol.java
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LengthFieldBasedFrameDecoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class Avl301Protocol extends BaseProtocol {
+
+    public Avl301Protocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LengthFieldBasedFrameDecoder(256, 2, 1, -3, 0));
+                pipeline.addLast(new Avl301ProtocolDecoder(Avl301Protocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Avl301ProtocolDecoder.java b/src/main/java/org/traccar/protocol/Avl301ProtocolDecoder.java
new file mode 100644
index 000000000..f6b7db2d6
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Avl301ProtocolDecoder.java
@@ -0,0 +1,145 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.DateBuilder;
+import org.traccar.model.CellTower;
+import org.traccar.model.Network;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+
+public class Avl301ProtocolDecoder extends BaseProtocolDecoder {
+
+    public Avl301ProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private String readImei(ByteBuf buf) {
+        int b = buf.readUnsignedByte();
+        StringBuilder imei = new StringBuilder();
+        imei.append(b & 0x0F);
+        for (int i = 0; i < 7; i++) {
+            b = buf.readUnsignedByte();
+            imei.append((b & 0xF0) >> 4);
+            imei.append(b & 0x0F);
+        }
+        return imei.toString();
+    }
+
+    public static final int MSG_LOGIN = 'L';
+    public static final int MSG_STATUS = 'H';
+    public static final int MSG_GPS_LBS_STATUS = '$';
+
+    private void sendResponse(Channel channel, int type) {
+        if (channel != null) {
+            ByteBuf response = Unpooled.buffer(5);
+            response.writeByte('$');
+            response.writeByte(type);
+            response.writeByte('#');
+            response.writeByte('\r'); response.writeByte('\n');
+            channel.writeAndFlush(new NetworkMessage(response, channel.remoteAddress()));
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        buf.skipBytes(1); // header
+        int type = buf.readUnsignedByte();
+        buf.readUnsignedByte(); // length
+
+        if (type == MSG_LOGIN) {
+
+            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, readImei(buf));
+            if (deviceSession == null) {
+                sendResponse(channel, type);
+            }
+
+        } else if (type == MSG_STATUS) {
+
+            sendResponse(channel, type);
+
+        } else if (type == MSG_GPS_LBS_STATUS) {
+
+            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+            if (deviceSession == null) {
+                return null;
+            }
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            DateBuilder dateBuilder = new DateBuilder()
+                    .setDate(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte())
+                    .setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte());
+            position.setTime(dateBuilder.getDate());
+
+            int gpsLength = buf.readUnsignedByte(); // gps len and sat
+            position.set(Position.KEY_SATELLITES, gpsLength & 0xf);
+
+            position.set(Position.KEY_SATELLITES_VISIBLE, buf.readUnsignedByte()); // satellites
+
+            double latitude = buf.readUnsignedInt() / 600000.0;
+            double longitude = buf.readUnsignedInt() / 600000.0;
+            position.setSpeed(buf.readUnsignedByte());
+
+            int union = buf.readUnsignedShort(); // course and flags
+            position.setCourse(union & 0x03FF);
+            position.setValid((union & 0x1000) != 0);
+            if ((union & 0x0400) != 0) {
+                latitude = -latitude;
+            }
+            if ((union & 0x0800) != 0) {
+                longitude = -longitude;
+            }
+
+            position.setLatitude(latitude);
+            position.setLongitude(longitude);
+
+            if ((union & 0x4000) != 0) {
+                position.set("acc", (union & 0x8000) != 0);
+            }
+
+            position.setNetwork(new Network(
+                    CellTower.fromLacCid(buf.readUnsignedShort(), buf.readUnsignedMedium())));
+
+            position.set(Position.KEY_ALARM, Position.ALARM_GENERAL);
+            int flags = buf.readUnsignedByte();
+            position.set("acc", (flags & 0x2) != 0);
+
+            // parse other flags
+
+            position.set(Position.KEY_POWER, buf.readUnsignedByte());
+            position.set(Position.KEY_RSSI, buf.readUnsignedByte());
+
+            return position;
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/BceFrameDecoder.java b/src/main/java/org/traccar/protocol/BceFrameDecoder.java
new file mode 100644
index 000000000..381a97696
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/BceFrameDecoder.java
@@ -0,0 +1,59 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+import org.traccar.BaseFrameDecoder;
+
+public class BceFrameDecoder extends BaseFrameDecoder {
+
+    private static final int HANDSHAKE_LENGTH = 7; // "#BCE#\r\n"
+
+    private boolean header = true;
+
+    private static byte checksum(ByteBuf buf, int end) {
+        byte result = 0;
+        for (int i = 0; i < end; i++) {
+            result += buf.getByte(buf.readerIndex() + i);
+        }
+        return result;
+    }
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+        if (header && buf.readableBytes() >= HANDSHAKE_LENGTH) {
+            buf.skipBytes(HANDSHAKE_LENGTH);
+            header = false;
+        }
+
+        int end = 8; // IMEI
+
+        while (buf.readableBytes() >= end + 2 + 1 + 1 + 1) {
+            end += buf.getUnsignedShortLE(buf.readerIndex() + end) + 2;
+
+            if (buf.readableBytes() > end && checksum(buf, end) == buf.getByte(buf.readerIndex() + end)) {
+                return buf.readRetainedSlice(end + 1);
+            }
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/BceProtocol.java b/src/main/java/org/traccar/protocol/BceProtocol.java
new file mode 100644
index 000000000..6453a05a9
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/BceProtocol.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+import org.traccar.model.Command;
+
+public class BceProtocol extends BaseProtocol {
+
+    public BceProtocol() {
+        setSupportedDataCommands(
+                Command.TYPE_OUTPUT_CONTROL);
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new BceFrameDecoder());
+                pipeline.addLast(new BceProtocolEncoder());
+                pipeline.addLast(new BceProtocolDecoder(BceProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/BceProtocolDecoder.java b/src/main/java/org/traccar/protocol/BceProtocolDecoder.java
new file mode 100644
index 000000000..ed810bebb
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/BceProtocolDecoder.java
@@ -0,0 +1,175 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.CellTower;
+import org.traccar.model.Network;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.Date;
+import java.util.LinkedList;
+import java.util.List;
+
+public class BceProtocolDecoder extends BaseProtocolDecoder {
+
+    public BceProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final int DATA_TYPE = 7;
+
+    public static final int MSG_ASYNC_STACK = 0xA5;
+    public static final int MSG_STACK_COFIRM = 0x19;
+    public static final int MSG_TIME_TRIGGERED = 0xA0;
+    public static final int MSG_OUTPUT_CONTROL = 0x41;
+    public static final int MSG_OUTPUT_CONTROL_ACK = 0xC1;
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        String imei = String.format("%015d", buf.readLongLE());
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        List<Position> positions = new LinkedList<>();
+
+        while (buf.readableBytes() > 1) {
+
+            int dataEnd = buf.readUnsignedShortLE() + buf.readerIndex();
+            int type = buf.readUnsignedByte();
+
+            if (type != MSG_ASYNC_STACK && type != MSG_TIME_TRIGGERED) {
+                return null;
+            }
+
+            int confirmKey = buf.readUnsignedByte() & 0x7F;
+
+            while (buf.readerIndex() < dataEnd) {
+
+                Position position = new Position(getProtocolName());
+                position.setDeviceId(deviceSession.getDeviceId());
+
+                int structEnd = buf.readUnsignedByte() + buf.readerIndex();
+
+                long time = buf.readUnsignedIntLE();
+                if ((time & 0x0f) == DATA_TYPE) {
+
+                    time = time >> 4 << 1;
+                    time += 0x47798280; // 01/01/2008
+                    position.setTime(new Date(time * 1000));
+
+                    // Read masks
+                    int mask;
+                    List<Integer> masks = new LinkedList<>();
+                    do {
+                        mask = buf.readUnsignedShortLE();
+                        masks.add(mask);
+                    } while (BitUtil.check(mask, 15));
+
+                    mask = masks.get(0);
+
+                    if (BitUtil.check(mask, 0)) {
+                        position.setValid(true);
+                        position.setLongitude(buf.readFloatLE());
+                        position.setLatitude(buf.readFloatLE());
+                        position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte()));
+
+                        int status = buf.readUnsignedByte();
+                        position.set(Position.KEY_SATELLITES, BitUtil.to(status, 4));
+                        position.set(Position.KEY_HDOP, BitUtil.from(status, 4));
+
+                        position.setCourse(buf.readUnsignedByte() * 2);
+                        position.setAltitude(buf.readUnsignedShortLE());
+
+                        position.set(Position.KEY_ODOMETER, buf.readUnsignedIntLE());
+                    }
+
+                    if (BitUtil.check(mask, 1)) {
+                        position.set(Position.KEY_INPUT, buf.readUnsignedShortLE());
+                    }
+
+                    for (int i = 1; i <= 8; i++) {
+                        if (BitUtil.check(mask, i + 1)) {
+                            position.set(Position.PREFIX_ADC + i, buf.readUnsignedShortLE());
+                        }
+                    }
+
+                    if (BitUtil.check(mask, 10)) {
+                        buf.skipBytes(4);
+                    }
+                    if (BitUtil.check(mask, 11)) {
+                        buf.skipBytes(4);
+                    }
+                    if (BitUtil.check(mask, 12)) {
+                        buf.skipBytes(2);
+                    }
+                    if (BitUtil.check(mask, 13)) {
+                        buf.skipBytes(2);
+                    }
+
+                    if (BitUtil.check(mask, 14)) {
+                        position.setNetwork(new Network(CellTower.from(
+                                buf.readUnsignedShortLE(), buf.readUnsignedByte(),
+                                buf.readUnsignedShortLE(), buf.readUnsignedShortLE(),
+                                buf.readUnsignedByte())));
+                        buf.readUnsignedByte();
+                    }
+
+                    if (BitUtil.check(mask, 0)) {
+                        positions.add(position);
+                    }
+                }
+
+                buf.readerIndex(structEnd);
+            }
+
+            // Send response
+            if (type == MSG_ASYNC_STACK && channel != null) {
+                ByteBuf response = Unpooled.buffer(8 + 2 + 2 + 1);
+                response.writeLongLE(Long.parseLong(imei));
+                response.writeShortLE(2);
+                response.writeByte(MSG_STACK_COFIRM);
+                response.writeByte(confirmKey);
+
+                int checksum = 0;
+                for (int i = 0; i < response.writerIndex(); i++) {
+                    checksum += response.getUnsignedByte(i);
+                }
+                response.writeByte(checksum);
+
+                channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
+            }
+        }
+
+        return positions;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/BceProtocolEncoder.java b/src/main/java/org/traccar/protocol/BceProtocolEncoder.java
new file mode 100644
index 000000000..1bbf3db12
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/BceProtocolEncoder.java
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import org.traccar.BaseProtocolEncoder;
+import org.traccar.helper.Checksum;
+import org.traccar.model.Command;
+
+public class BceProtocolEncoder extends BaseProtocolEncoder {
+
+    @Override
+    protected Object encodeCommand(Command command) {
+
+        if (command.getType().equals(Command.TYPE_OUTPUT_CONTROL)) {
+            ByteBuf buf = Unpooled.buffer();
+
+            buf.writeLongLE(Long.parseLong(getUniqueId(command.getDeviceId())));
+            buf.writeShortLE(1 + 1 + 3 + 1); // length
+            buf.writeByte(BceProtocolDecoder.MSG_OUTPUT_CONTROL);
+            buf.writeByte(command.getInteger(Command.KEY_INDEX) == 1 ? 0x0A : 0x0B);
+            buf.writeByte(0xFF); // index
+            buf.writeByte(0x00); // form id
+            buf.writeShortLE(Integer.parseInt(command.getString(Command.KEY_DATA)) > 0 ? 0x0055 : 0x0000);
+            buf.writeByte(Checksum.sum(buf.nioBuffer()));
+
+            return buf;
+        } else {
+            return null;
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/BlackKiteProtocol.java b/src/main/java/org/traccar/protocol/BlackKiteProtocol.java
new file mode 100644
index 000000000..617a24d7a
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/BlackKiteProtocol.java
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2015 Vijay Kumar (vijaykumar@zilogic.com)
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class BlackKiteProtocol extends BaseProtocol {
+
+    public BlackKiteProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new GalileoFrameDecoder());
+                pipeline.addLast(new BlackKiteProtocolDecoder(BlackKiteProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/BlackKiteProtocolDecoder.java b/src/main/java/org/traccar/protocol/BlackKiteProtocolDecoder.java
new file mode 100644
index 000000000..dca4b908a
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/BlackKiteProtocolDecoder.java
@@ -0,0 +1,195 @@
+/*
+ * Copyright 2013 - 2018 Anton Tananaev (anton@traccar.org)
+ * Copyright 2015 Vijay Kumar (vijaykumar@zilogic.com)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.Date;
+import java.util.HashSet;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Set;
+
+public class BlackKiteProtocolDecoder extends BaseProtocolDecoder {
+
+    public BlackKiteProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final int TAG_IMEI = 0x03;
+    private static final int TAG_DATE = 0x20;
+    private static final int TAG_COORDINATES = 0x30;
+    private static final int TAG_SPEED_COURSE = 0x33;
+    private static final int TAG_ALTITUDE = 0x34;
+    private static final int TAG_STATUS = 0x40;
+    private static final int TAG_DIGITAL_OUTPUTS = 0x45;
+    private static final int TAG_DIGITAL_INPUTS = 0x46;
+    private static final int TAG_INPUT_VOLTAGE1 = 0x50;
+    private static final int TAG_INPUT_VOLTAGE2 = 0x51;
+    private static final int TAG_INPUT_VOLTAGE3 = 0x52;
+    private static final int TAG_INPUT_VOLTAGE4 = 0x53;
+    private static final int TAG_XT1 = 0x60;
+    private static final int TAG_XT2 = 0x61;
+    private static final int TAG_XT3 = 0x62;
+
+    private void sendReply(Channel channel, int checksum) {
+        if (channel != null) {
+            ByteBuf reply = Unpooled.buffer(3);
+            reply.writeByte(0x02);
+            reply.writeShortLE((short) checksum);
+            channel.writeAndFlush(new NetworkMessage(reply, channel.remoteAddress()));
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        buf.readUnsignedByte(); // header
+        int length = (buf.readUnsignedShortLE() & 0x7fff) + 3;
+
+        List<Position> positions = new LinkedList<>();
+        Set<Integer> tags = new HashSet<>();
+        boolean hasLocation = false;
+        Position position = new Position(getProtocolName());
+
+        while (buf.readerIndex() < length) {
+
+            // Check if new message started
+            int tag = buf.readUnsignedByte();
+            if (tags.contains(tag)) {
+                if (hasLocation && position.getFixTime() != null) {
+                    positions.add(position);
+                }
+                tags.clear();
+                hasLocation = false;
+                position = new Position(getProtocolName());
+            }
+            tags.add(tag);
+
+            switch (tag) {
+
+                case TAG_IMEI:
+                    getDeviceSession(channel, remoteAddress, buf.readSlice(15).toString(StandardCharsets.US_ASCII));
+                    break;
+
+                case TAG_DATE:
+                    position.setTime(new Date(buf.readUnsignedIntLE() * 1000));
+                    break;
+
+                case TAG_COORDINATES:
+                    hasLocation = true;
+                    position.setValid((buf.readUnsignedByte() & 0xf0) == 0x00);
+                    position.setLatitude(buf.readIntLE() / 1000000.0);
+                    position.setLongitude(buf.readIntLE() / 1000000.0);
+                    break;
+
+                case TAG_SPEED_COURSE:
+                    position.setSpeed(buf.readUnsignedShortLE() * 0.0539957);
+                    position.setCourse(buf.readUnsignedShortLE() * 0.1);
+                    break;
+
+                case TAG_ALTITUDE:
+                    position.setAltitude(buf.readShortLE());
+                    break;
+
+                case TAG_STATUS:
+                    int status = buf.readUnsignedShortLE();
+                    position.set(Position.KEY_IGNITION, BitUtil.check(status, 9));
+                    if (BitUtil.check(status, 15)) {
+                        position.set(Position.KEY_ALARM, Position.ALARM_GENERAL);
+                    }
+                    position.set(Position.KEY_CHARGE, BitUtil.check(status, 2));
+                    break;
+
+                case TAG_DIGITAL_INPUTS:
+                    int input = buf.readUnsignedShortLE();
+                    for (int i = 0; i < 16; i++) {
+                        position.set(Position.PREFIX_IO + (i + 1), BitUtil.check(input, i));
+                    }
+                    break;
+
+                case TAG_DIGITAL_OUTPUTS:
+                    int output = buf.readUnsignedShortLE();
+                    for (int i = 0; i < 16; i++) {
+                        position.set(Position.PREFIX_IO + (i + 17), BitUtil.check(output, i));
+                    }
+                    break;
+
+                case TAG_INPUT_VOLTAGE1:
+                    position.set(Position.PREFIX_ADC + 1, buf.readUnsignedShortLE() / 1000.0);
+                    break;
+
+                case TAG_INPUT_VOLTAGE2:
+                    position.set(Position.PREFIX_ADC + 2, buf.readUnsignedShortLE() / 1000.0);
+                    break;
+
+                case TAG_INPUT_VOLTAGE3:
+                    position.set(Position.PREFIX_ADC + 3, buf.readUnsignedShortLE() / 1000.0);
+                    break;
+
+                case TAG_INPUT_VOLTAGE4:
+                    position.set(Position.PREFIX_ADC + 4, buf.readUnsignedShortLE() / 1000.0);
+                    break;
+
+                case TAG_XT1:
+                case TAG_XT2:
+                case TAG_XT3:
+                    buf.skipBytes(16);
+                    break;
+
+                default:
+                    break;
+
+            }
+        }
+
+        if (hasLocation && position.getFixTime() != null) {
+            positions.add(position);
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        sendReply(channel, buf.readUnsignedShortLE());
+
+        for (Position p : positions) {
+            p.setDeviceId(deviceSession.getDeviceId());
+        }
+
+        if (positions.isEmpty()) {
+            return null;
+        }
+
+        return positions;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/BoxProtocol.java b/src/main/java/org/traccar/protocol/BoxProtocol.java
new file mode 100644
index 000000000..dfea15938
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/BoxProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.CharacterDelimiterFrameDecoder;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class BoxProtocol extends BaseProtocol {
+
+    public BoxProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, '\r'));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new BoxProtocolDecoder(BoxProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/BoxProtocolDecoder.java b/src/main/java/org/traccar/protocol/BoxProtocolDecoder.java
new file mode 100644
index 000000000..3635c29e5
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/BoxProtocolDecoder.java
@@ -0,0 +1,108 @@
+/*
+ * Copyright 2014 - 2019 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class BoxProtocolDecoder extends BaseProtocolDecoder {
+
+    public BoxProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("L,")
+            .number("(dd)(dd)(dd)")              // date (yymmdd)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .text("G,")
+            .number("(-?d+.d+),")                // latitude
+            .number("(-?d+.d+),")                // longitude
+            .number("(d+.?d*),")                 // speed
+            .number("(d+.?d*),")                 // course
+            .number("(d+.?d*),")                 // distance
+            .number("(d+),")                     // event
+            .number("(d+)")                      // status
+            .any()
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        String sentence = (String) msg;
+
+        if (sentence.startsWith("H,")) {
+
+            int index = sentence.indexOf(',', 2) + 1;
+            String id = sentence.substring(index, sentence.indexOf(',', index));
+            getDeviceSession(channel, remoteAddress, id);
+
+        } else if (sentence.startsWith("E,")) {
+
+            if (channel != null) {
+                channel.writeAndFlush(new NetworkMessage("A," + sentence.substring(2) + "\r", remoteAddress));
+            }
+
+        } else if (sentence.startsWith("L,")) {
+
+            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+            if (deviceSession == null) {
+                return null;
+            }
+
+            Parser parser = new Parser(PATTERN, sentence);
+            if (!parser.matches()) {
+                return null;
+            }
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            position.setTime(parser.nextDateTime());
+
+            position.setLatitude(parser.nextDouble());
+            position.setLongitude(parser.nextDouble());
+            position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble()));
+            position.setCourse(parser.nextDouble());
+
+            position.set(Position.KEY_ODOMETER_TRIP, parser.nextDouble() * 1000);
+            position.set(Position.KEY_EVENT, parser.next());
+
+            int status = parser.nextInt();
+            position.set(Position.KEY_IGNITION, BitUtil.check(status, 0));
+            position.set(Position.KEY_MOTION, BitUtil.check(status, 1));
+            position.setValid(!BitUtil.check(status, 2));
+            position.set(Position.KEY_STATUS, status);
+
+            return position;
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/C2stekProtocol.java b/src/main/java/org/traccar/protocol/C2stekProtocol.java
new file mode 100644
index 000000000..804621fd3
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/C2stekProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.CharacterDelimiterFrameDecoder;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class C2stekProtocol extends BaseProtocol {
+
+    public C2stekProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, false, "$AP"));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new C2stekProtocolDecoder(C2stekProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/C2stekProtocolDecoder.java b/src/main/java/org/traccar/protocol/C2stekProtocolDecoder.java
new file mode 100644
index 000000000..6a31cb2f4
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/C2stekProtocolDecoder.java
@@ -0,0 +1,121 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class C2stekProtocolDecoder extends BaseProtocolDecoder {
+
+    public C2stekProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("PA$")
+            .number("(d+)")                      // imei
+            .text("$")
+            .expression(".#")                    // data type
+            .number("(dd)(dd)(dd)#")             // date (yymmdd)
+            .number("(dd)(dd)(dd)#")             // time (hhmmss)
+            .number("([01])#")                   // valid
+            .number("([+-]?d+.d+)#")             // latitude
+            .number("([+-]?d+.d+)#")             // longitude
+            .number("(d+.d+)#")                  // speed
+            .number("(d+.d+)#")                  // course
+            .number("(-?d+.d+)#")                // altitude
+            .number("(d+)#")                     // battery
+            .number("d+#")                       // geo area alarm
+            .number("(x+)#")                     // alarm
+            .number("([01])")                    // armed
+            .number("([01])")                    // door
+            .number("([01])#")                   // ignition
+            .any()
+            .text("$AP")
+            .compile();
+
+    private String decodeAlarm(int alarm) {
+        switch (alarm) {
+            case 0x2:
+                return Position.ALARM_SHOCK;
+            case 0x3:
+                return Position.ALARM_POWER_CUT;
+            case 0x4:
+                return Position.ALARM_OVERSPEED;
+            case 0x5:
+                return Position.ALARM_SOS;
+            case 0x6:
+                return Position.ALARM_DOOR;
+            case 0xA:
+                return Position.ALARM_LOW_BATTERY;
+            case 0xB:
+                return Position.ALARM_FAULT;
+            default:
+                return null;
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        String sentence = (String) msg;
+        if (sentence.contains("$20$") && channel != null) {
+            channel.writeAndFlush(new NetworkMessage(sentence, remoteAddress));
+        }
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setTime(parser.nextDateTime());
+        position.setValid(parser.nextInt() > 0);
+        position.setLatitude(parser.nextDouble());
+        position.setLongitude(parser.nextDouble());
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble()));
+        position.setCourse(parser.nextDouble());
+        position.setAltitude(parser.nextDouble());
+
+        position.set(Position.KEY_BATTERY, parser.nextInt() * 0.001);
+        position.set(Position.KEY_ALARM, decodeAlarm(parser.nextHexInt()));
+
+        position.set(Position.KEY_ARMED, parser.nextInt() > 0);
+        position.set(Position.KEY_DOOR, parser.nextInt() > 0);
+        position.set(Position.KEY_IGNITION, parser.nextInt() > 0);
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/CalAmpProtocol.java b/src/main/java/org/traccar/protocol/CalAmpProtocol.java
new file mode 100644
index 000000000..232e72a8c
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/CalAmpProtocol.java
@@ -0,0 +1,33 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class CalAmpProtocol extends BaseProtocol {
+
+    public CalAmpProtocol() {
+        addServer(new TrackerServer(true, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CalAmpProtocolDecoder(CalAmpProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/CalAmpProtocolDecoder.java b/src/main/java/org/traccar/protocol/CalAmpProtocolDecoder.java
new file mode 100644
index 000000000..31416d7f1
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/CalAmpProtocolDecoder.java
@@ -0,0 +1,202 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.ByteBufUtil;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.Date;
+
+public class CalAmpProtocolDecoder extends BaseProtocolDecoder {
+
+    public CalAmpProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    public static final int MSG_NULL = 0;
+    public static final int MSG_ACK = 1;
+    public static final int MSG_EVENT_REPORT = 2;
+    public static final int MSG_ID_REPORT = 3;
+    public static final int MSG_USER_DATA = 4;
+    public static final int MSG_APP_DATA = 5;
+    public static final int MSG_CONFIG = 6;
+    public static final int MSG_UNIT_REQUEST = 7;
+    public static final int MSG_LOCATE_REPORT = 8;
+    public static final int MSG_USER_DATA_ACC = 9;
+    public static final int MSG_MINI_EVENT_REPORT = 10;
+    public static final int MSG_MINI_USER_DATA = 11;
+
+    public static final int SERVICE_UNACKNOWLEDGED = 0;
+    public static final int SERVICE_ACKNOWLEDGED = 1;
+    public static final int SERVICE_RESPONSE = 2;
+
+    private void sendResponse(Channel channel, SocketAddress remoteAddress, int type, int index, int result) {
+        if (channel != null) {
+            ByteBuf response = Unpooled.buffer(10);
+            response.writeByte(SERVICE_RESPONSE);
+            response.writeByte(MSG_ACK);
+            response.writeShort(index);
+            response.writeByte(type);
+            response.writeByte(result);
+            response.writeByte(0);
+            response.writeMedium(0);
+            channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
+        }
+    }
+
+    private Position decodePosition(DeviceSession deviceSession, int type, ByteBuf buf) {
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setTime(new Date(buf.readUnsignedInt() * 1000));
+        if (type != MSG_MINI_EVENT_REPORT) {
+            buf.readUnsignedInt(); // fix time
+        }
+        position.setLatitude(buf.readInt() * 0.0000001);
+        position.setLongitude(buf.readInt() * 0.0000001);
+        if (type != MSG_MINI_EVENT_REPORT) {
+            position.setAltitude(buf.readInt() * 0.01);
+            position.setSpeed(UnitsConverter.knotsFromCps(buf.readUnsignedInt()));
+        }
+        position.setCourse(buf.readShort());
+        if (type == MSG_MINI_EVENT_REPORT) {
+            position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte()));
+        }
+
+        if (type == MSG_MINI_EVENT_REPORT) {
+            position.set(Position.KEY_SATELLITES, buf.getUnsignedByte(buf.readerIndex()) & 0xf);
+            position.setValid((buf.readUnsignedByte() & 0x20) == 0);
+        } else {
+            position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
+            position.setValid((buf.readUnsignedByte() & 0x08) == 0);
+        }
+
+        if (type != MSG_MINI_EVENT_REPORT) {
+            position.set("carrier", buf.readUnsignedShort());
+            position.set(Position.KEY_RSSI, buf.readShort());
+        }
+
+        position.set("modem", buf.readUnsignedByte());
+
+        if (type != MSG_MINI_EVENT_REPORT) {
+            position.set(Position.KEY_HDOP, buf.readUnsignedByte());
+        }
+
+        int input = buf.readUnsignedByte();
+        position.set(Position.KEY_INPUT, input);
+        position.set(Position.KEY_IGNITION, BitUtil.check(input, 0));
+
+        if (type != MSG_MINI_EVENT_REPORT) {
+            position.set(Position.KEY_STATUS, buf.readUnsignedByte());
+        }
+
+        if (type == MSG_EVENT_REPORT || type == MSG_MINI_EVENT_REPORT) {
+            if (type != MSG_MINI_EVENT_REPORT) {
+                buf.readUnsignedByte(); // event index
+            }
+            position.set(Position.KEY_EVENT, buf.readUnsignedByte());
+        }
+
+        int accType = BitUtil.from(buf.getUnsignedByte(buf.readerIndex()), 6);
+        int accCount = BitUtil.to(buf.readUnsignedByte(), 6);
+
+        if (type != MSG_MINI_EVENT_REPORT) {
+            position.set("append", buf.readUnsignedByte());
+        }
+
+        if (accType == 1) {
+            buf.readUnsignedInt(); // threshold
+            buf.readUnsignedInt(); // mask
+        }
+
+        for (int i = 0; i < accCount; i++) {
+            if (buf.readableBytes() >= 4) {
+                position.set("acc" + i, buf.readUnsignedInt());
+            }
+        }
+
+        return position;
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        if (BitUtil.check(buf.getByte(buf.readerIndex()), 7)) {
+
+            int content = buf.readUnsignedByte();
+
+            if (BitUtil.check(content, 0)) {
+                String id = ByteBufUtil.hexDump(buf.readSlice(buf.readUnsignedByte()));
+                getDeviceSession(channel, remoteAddress, id);
+            }
+
+            if (BitUtil.check(content, 1)) {
+                buf.skipBytes(buf.readUnsignedByte()); // identifier type
+            }
+
+            if (BitUtil.check(content, 2)) {
+                buf.skipBytes(buf.readUnsignedByte()); // authentication
+            }
+
+            if (BitUtil.check(content, 3)) {
+                buf.skipBytes(buf.readUnsignedByte()); // routing
+            }
+
+            if (BitUtil.check(content, 4)) {
+                buf.skipBytes(buf.readUnsignedByte()); // forwarding
+            }
+
+            if (BitUtil.check(content, 5)) {
+                buf.skipBytes(buf.readUnsignedByte()); // response redirection
+            }
+
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        int service = buf.readUnsignedByte();
+        int type = buf.readUnsignedByte();
+        int index = buf.readUnsignedShort();
+
+        if (service == SERVICE_ACKNOWLEDGED) {
+            sendResponse(channel, remoteAddress, type, index, 0);
+        }
+
+        if (type == MSG_EVENT_REPORT || type == MSG_LOCATE_REPORT || type == MSG_MINI_EVENT_REPORT) {
+            return decodePosition(deviceSession, type, buf);
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/CarTrackProtocol.java b/src/main/java/org/traccar/protocol/CarTrackProtocol.java
new file mode 100644
index 000000000..e340fba25
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/CarTrackProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.CharacterDelimiterFrameDecoder;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class CarTrackProtocol extends BaseProtocol {
+
+    public CarTrackProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, "##"));
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new CarTrackProtocolDecoder(CarTrackProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/CarTrackProtocolDecoder.java b/src/main/java/org/traccar/protocol/CarTrackProtocolDecoder.java
new file mode 100644
index 000000000..ce3345826
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/CarTrackProtocolDecoder.java
@@ -0,0 +1,108 @@
+/*
+ * Copyright 2014 - 2018 Anton Tananaev (anton@traccar.org)
+ * Copyright 2014 Rohit
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class CarTrackProtocolDecoder extends BaseProtocolDecoder {
+
+    public CarTrackProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("$$")                          // header
+            .number("(d+)")                      // device id
+            .text("?").expression("*")
+            .text("&A")
+            .number("(dddd)")                    // command
+            .text("&B")
+            .number("(dd)(dd)(dd).(ddd),")       // time (hhmmss.sss)
+            .expression("([AV]),")               // validity
+            .number("(dd)(dd.dddd),")            // latitude
+            .expression("([NS]),")
+            .number("(ddd)(dd.dddd),")           // longitude
+            .expression("([EW]),")
+            .number("(d+.d*)?,")                 // speed
+            .number("(d+.d*)?,")                 // course
+            .number("(dd)(dd)(dd)")              // date (ddmmyy)
+            .any()
+            .expression("&C([^&]*)")             // io
+            .expression("&D([^&]*)")             // odometer
+            .expression("&E([^&]*)")             // alarm
+            .expression("&Y([^&]*)").optional()  // adc
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.set(Position.KEY_COMMAND, parser.next());
+
+        DateBuilder dateBuilder = new DateBuilder()
+                .setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+
+        position.setValid(parser.next().equals("A"));
+        position.setLatitude(parser.nextCoordinate());
+        position.setLongitude(parser.nextCoordinate());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
+
+        dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+        position.setTime(dateBuilder.getDate());
+
+        position.set(Position.PREFIX_IO + 1, parser.next());
+
+        String odometer = parser.next();
+        odometer = odometer.replace(":", "A");
+        odometer = odometer.replace(";", "B");
+        odometer = odometer.replace("<", "C");
+        odometer = odometer.replace("=", "D");
+        odometer = odometer.replace(">", "E");
+        odometer = odometer.replace("?", "F");
+        position.set(Position.KEY_ODOMETER, Integer.parseInt(odometer, 16));
+
+        parser.next(); // there is no meaningful alarms
+        position.set(Position.PREFIX_ADC + 1, parser.next());
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/CarcellProtocol.java b/src/main/java/org/traccar/protocol/CarcellProtocol.java
new file mode 100644
index 000000000..0c305efcb
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/CarcellProtocol.java
@@ -0,0 +1,44 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.CharacterDelimiterFrameDecoder;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+import org.traccar.model.Command;
+
+public class CarcellProtocol extends BaseProtocol {
+
+    public CarcellProtocol() {
+        setSupportedDataCommands(
+                Command.TYPE_ENGINE_STOP,
+                Command.TYPE_ENGINE_RESUME);
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, '\r'));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new CarcellProtocolEncoder());
+                pipeline.addLast(new CarcellProtocolDecoder(CarcellProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/CarcellProtocolDecoder.java b/src/main/java/org/traccar/protocol/CarcellProtocolDecoder.java
new file mode 100644
index 000000000..344b2f1ea
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/CarcellProtocolDecoder.java
@@ -0,0 +1,164 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.Parser.CoordinateFormat;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+public class CarcellProtocolDecoder extends BaseProtocolDecoder {
+
+    public CarcellProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .expression("([$%])")                // memory flag
+            .number("(d+),")                     // imei
+            .groupBegin()
+            .number("([NS])(dd)(dd).(dddd),")    // latitude
+            .number("([EW])(ddd)(dd).(dddd),")   // longitude
+            .or()
+            .text("CEL,")
+            .number("([NS])(d+.d+),")            // latitude
+            .number("([EW])(d+.d+),")            // longitude
+            .groupEnd()
+            .number("(d+),")                     // speed
+            .number("(d+),")                     // course
+            .groupBegin()
+            .number("([-+]ddd)([-+]ddd)([-+]ddd),") // x,y,z
+            .or()
+            .number("(d+),")                     // accel
+            .groupEnd()
+            .number("(d+),")                     // battery
+            .number("(d+),")                     // csq
+            .number("(d),")                      // jamming
+            .number("(d+),")                     // hdop
+            .expression("([CG]),?")              // clock type
+            .number("(dd)(dd)(dd),")             // date (ddmmyy)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .number("(d),")                      // block
+            .number("(d),")                      // ignition
+            .groupBegin()
+            .number("(d),")                      // cloned
+            .expression("([AF])")                // panic
+            .number("(d),")                      // painel
+            .number("(d+),")                     // battery voltage
+            .or()
+            .number("(dd),")                     // time until delivery
+            .expression("([AF])")                // panic
+            .number("(d),")                      // aux
+            .number("(d{2,4}),")                 // battery voltage
+            .number("(d{20}),")                  // ccid
+            .groupEnd()
+            .number("(xx)")                      // crc
+            .any()                               // full format
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.set(Position.KEY_ARCHIVE, parser.next().equals("%"));
+        position.setValid(true);
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        if (parser.hasNext(8)) {
+            position.setLatitude(parser.nextCoordinate(CoordinateFormat.HEM_DEG_MIN_MIN));
+            position.setLongitude(parser.nextCoordinate(CoordinateFormat.HEM_DEG_MIN_MIN));
+        }
+
+        if (parser.hasNext(4)) {
+            position.setLatitude(parser.nextCoordinate(CoordinateFormat.HEM_DEG));
+            position.setLongitude(parser.nextCoordinate(CoordinateFormat.HEM_DEG));
+        }
+
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextInt(0)));
+        position.setCourse(parser.nextInt(0));
+
+        if (parser.hasNext(3)) {
+            position.set("x", parser.nextInt(0));
+            position.set("y", parser.nextInt(0));
+            position.set("z", parser.nextInt(0));
+        }
+
+        if (parser.hasNext(1)) {
+            position.set(Position.KEY_ACCELERATION, parser.nextInt(0));
+        }
+
+        Double internalBattery = (parser.nextDouble(0) + 100d) * 0.0294d;
+        position.set(Position.KEY_BATTERY, internalBattery);
+        position.set(Position.KEY_RSSI, parser.nextInt(0));
+        position.set("jamming", parser.next().equals("1"));
+        position.set(Position.KEY_GPS, parser.nextInt(0));
+
+        position.set("clockType", parser.next());
+
+        position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
+
+        position.set("blocked", parser.next().equals("1"));
+        position.set(Position.KEY_IGNITION, parser.next().equals("1"));
+
+        if (parser.hasNext(4)) {
+            position.set("cloned", parser.next().equals("1"));
+
+            parser.next(); // panic button status
+
+            String painelStatus = parser.next();
+            if (painelStatus.equals("1")) {
+                position.set(Position.KEY_ALARM, Position.ALARM_GENERAL);
+            }
+            position.set("painel", painelStatus.equals("2"));
+
+            Double mainVoltage = parser.nextDouble(0) / 100d;
+            position.set(Position.KEY_POWER, mainVoltage);
+        }
+
+        if (parser.hasNext(5)) {
+            position.set("timeUntilDelivery", parser.nextInt(0));
+            parser.next(); // panic button status
+            position.set(Position.KEY_INPUT, parser.next());
+
+            Double mainVoltage = parser.nextDouble(0) / 100d;
+            position.set(Position.KEY_POWER, mainVoltage);
+
+            position.set("iccid", parser.next());
+        }
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/CarcellProtocolEncoder.java b/src/main/java/org/traccar/protocol/CarcellProtocolEncoder.java
new file mode 100644
index 000000000..e8f0081a0
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/CarcellProtocolEncoder.java
@@ -0,0 +1,36 @@
+/*
+ * Copyright 2016 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.StringProtocolEncoder;
+import org.traccar.model.Command;
+
+public class CarcellProtocolEncoder extends StringProtocolEncoder {
+
+    @Override
+    protected Object encodeCommand(Command command) {
+
+        switch (command.getType()) {
+            case Command.TYPE_ENGINE_STOP:
+                return formatCommand(command, "$SRVCMD,{%s},BA#\r\n", Command.KEY_UNIQUE_ID);
+            case Command.TYPE_ENGINE_RESUME:
+                return formatCommand(command, "$SRVCMD,{%s},BD#\r\n", Command.KEY_UNIQUE_ID);
+            default:
+                return null;
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/CarscopProtocol.java b/src/main/java/org/traccar/protocol/CarscopProtocol.java
new file mode 100644
index 000000000..2c754a97f
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/CarscopProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.CharacterDelimiterFrameDecoder;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class CarscopProtocol extends BaseProtocol {
+
+    public CarscopProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, '^'));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new CarscopProtocolDecoder(CarscopProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/CarscopProtocolDecoder.java b/src/main/java/org/traccar/protocol/CarscopProtocolDecoder.java
new file mode 100644
index 000000000..161666adc
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/CarscopProtocolDecoder.java
@@ -0,0 +1,101 @@
+/*
+ * Copyright 2013 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class CarscopProtocolDecoder extends BaseProtocolDecoder {
+
+    public CarscopProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("*")
+            .any()
+            .number("(dd)(dd)(dd)")              // time (hhmmss)
+            .expression("([AV])")                // validity
+            .number("(dd)(dd.dddd)")             // latitude
+            .expression("([NS])")
+            .number("(ddd)(dd.dddd)")            // longitude
+            .expression("([EW])")
+            .number("(ddd.d)")                   // speed
+            .number("(dd)(dd)(dd)")              // date (yymmdd)
+            .number("(ddd.dd)")                  // course
+            .groupBegin()
+            .number("(d{8})")                    // state
+            .number("L(d{6})")                   // odometer
+            .groupEnd("?")
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        String sentence = (String) msg;
+
+        DeviceSession deviceSession;
+        int index = sentence.indexOf("UB05");
+        if (index != -1) {
+            String imei = sentence.substring(index + 4, index + 4 + 15);
+            deviceSession = getDeviceSession(channel, remoteAddress, imei);
+        } else {
+            deviceSession = getDeviceSession(channel, remoteAddress);
+        }
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Parser parser = new Parser(PATTERN, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        DateBuilder dateBuilder = new DateBuilder()
+                .setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+
+        position.setValid(parser.next().equals("A"));
+        position.setLatitude(parser.nextCoordinate());
+        position.setLongitude(parser.nextCoordinate());
+        position.setSpeed(parser.nextDouble(0));
+
+        dateBuilder.setDate(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+        position.setTime(dateBuilder.getDate());
+
+        position.setCourse(parser.nextDouble(0));
+
+        if (parser.hasNext(2)) {
+            position.set(Position.KEY_STATUS, parser.next());
+            position.set(Position.KEY_ODOMETER, parser.nextInt(0));
+        }
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/CastelProtocol.java b/src/main/java/org/traccar/protocol/CastelProtocol.java
new file mode 100644
index 000000000..9b854afc3
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/CastelProtocol.java
@@ -0,0 +1,48 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LengthFieldBasedFrameDecoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+import org.traccar.model.Command;
+
+import java.nio.ByteOrder;
+public class CastelProtocol extends BaseProtocol {
+
+    public CastelProtocol() {
+        setSupportedDataCommands(
+                Command.TYPE_ENGINE_STOP,
+                Command.TYPE_ENGINE_RESUME);
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LengthFieldBasedFrameDecoder(ByteOrder.LITTLE_ENDIAN, 1024, 2, 2, -4, 0, true));
+                pipeline.addLast(new CastelProtocolEncoder());
+                pipeline.addLast(new CastelProtocolDecoder(CastelProtocol.this));
+            }
+        });
+        addServer(new TrackerServer(true, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CastelProtocolEncoder());
+                pipeline.addLast(new CastelProtocolDecoder(CastelProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/CastelProtocolDecoder.java b/src/main/java/org/traccar/protocol/CastelProtocolDecoder.java
new file mode 100644
index 000000000..0541adf6f
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/CastelProtocolDecoder.java
@@ -0,0 +1,573 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.ByteBufUtil;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.Checksum;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.ObdDecoder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.CellTower;
+import org.traccar.model.Network;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.HashMap;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
+
+public class CastelProtocolDecoder extends BaseProtocolDecoder {
+
+    private static final Map<Integer, Integer> PID_LENGTH_MAP = new HashMap<>();
+
+    static {
+        int[] l1 = {
+            0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0b, 0x0d,
+            0x0e, 0x0f, 0x11, 0x12, 0x13, 0x1c, 0x1d, 0x1e, 0x2c,
+            0x2d, 0x2e, 0x2f, 0x30, 0x33, 0x43, 0x45, 0x46,
+            0x47, 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x51, 0x52,
+            0x5a
+        };
+        int[] l2 = {
+            0x02, 0x03, 0x0a, 0x0c, 0x10, 0x14, 0x15, 0x16,
+            0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1f, 0x21, 0x22,
+            0x23, 0x31, 0x32, 0x3c, 0x3d, 0x3e, 0x3f, 0x42,
+            0x44, 0x4d, 0x4e, 0x50, 0x53, 0x54, 0x55, 0x56,
+            0x57, 0x58, 0x59
+        };
+        int[] l4 = {
+            0x00, 0x01, 0x20, 0x24, 0x25, 0x26, 0x27, 0x28,
+            0x29, 0x2a, 0x2b, 0x34, 0x35, 0x36, 0x37, 0x38,
+            0x39, 0x3a, 0x3b, 0x40, 0x41, 0x4f
+        };
+        for (int i : l1) {
+            PID_LENGTH_MAP.put(i, 1);
+        }
+        for (int i : l2) {
+            PID_LENGTH_MAP.put(i, 2);
+        }
+        for (int i : l4) {
+            PID_LENGTH_MAP.put(i, 4);
+        }
+    }
+
+    public CastelProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    public static final short MSG_SC_LOGIN = 0x1001;
+    public static final short MSG_SC_LOGIN_RESPONSE = (short) 0x9001;
+    public static final short MSG_SC_LOGOUT = 0x1002;
+    public static final short MSG_SC_HEARTBEAT = 0x1003;
+    public static final short MSG_SC_HEARTBEAT_RESPONSE = (short) 0x9003;
+    public static final short MSG_SC_GPS = 0x4001;
+    public static final short MSG_SC_PID_DATA = 0x4002;
+    public static final short MSG_SC_SUPPORTED_PID = 0x4004;
+    public static final short MSG_SC_OBD_DATA = 0x4005;
+    public static final short MSG_SC_DTCS_PASSENGER = 0x4006;
+    public static final short MSG_SC_DTCS_COMMERCIAL = 0x400B;
+    public static final short MSG_SC_ALARM = 0x4007;
+    public static final short MSG_SC_CELL = 0x4008;
+    public static final short MSG_SC_GPS_SLEEP = 0x4009;
+    public static final short MSG_SC_FUEL = 0x400E;
+    public static final short MSG_SC_AGPS_REQUEST = 0x5101;
+    public static final short MSG_SC_QUERY_RESPONSE = (short) 0xA002;
+    public static final short MSG_SC_CURRENT_LOCATION = (short) 0xB001;
+
+    public static final short MSG_CC_LOGIN = 0x4001;
+    public static final short MSG_CC_LOGIN_RESPONSE = (short) 0x8001;
+    public static final short MSG_CC_HEARTBEAT = 0x4206;
+    public static final short MSG_CC_PETROL_CONTROL = 0x4583;
+    public static final short MSG_CC_HEARTBEAT_RESPONSE = (short) 0x8206;
+
+    private Position readPosition(DeviceSession deviceSession, ByteBuf buf) {
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        DateBuilder dateBuilder = new DateBuilder()
+                .setDateReverse(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte())
+                .setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte());
+        position.setTime(dateBuilder.getDate());
+
+        double lat = buf.readUnsignedIntLE() / 3600000.0;
+        double lon = buf.readUnsignedIntLE() / 3600000.0;
+        position.setSpeed(UnitsConverter.knotsFromCps(buf.readUnsignedShortLE()));
+        position.setCourse(buf.readUnsignedShortLE() * 0.1);
+
+        int flags = buf.readUnsignedByte();
+        if ((flags & 0x02) == 0) {
+            lat = -lat;
+        }
+        if ((flags & 0x01) == 0) {
+            lon = -lon;
+        }
+        position.setLatitude(lat);
+        position.setLongitude(lon);
+        position.setValid((flags & 0x0C) > 0);
+        position.set(Position.KEY_SATELLITES, flags >> 4);
+
+        return position;
+    }
+
+    private Position createPosition(DeviceSession deviceSession) {
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        getLastLocation(position, null);
+
+        return position;
+    }
+
+    private void decodeObd(Position position, ByteBuf buf, boolean groups) {
+
+        int count = buf.readUnsignedByte();
+
+        int[] pids = new int[count];
+        for (int i = 0; i < count; i++) {
+            pids[i] = buf.readUnsignedShortLE() & 0xff;
+        }
+
+        if (groups) {
+            buf.readUnsignedByte(); // group count
+            buf.readUnsignedByte(); // group size
+        }
+
+        for (int i = 0; i < count; i++) {
+            int value;
+            switch (PID_LENGTH_MAP.get(pids[i])) {
+                case 1:
+                    value = buf.readUnsignedByte();
+                    break;
+                case 2:
+                    value = buf.readUnsignedShortLE();
+                    break;
+                case 4:
+                    value = buf.readIntLE();
+                    break;
+                default:
+                    value = 0;
+                    break;
+            }
+            position.add(ObdDecoder.decodeData(pids[i], value, false));
+        }
+    }
+
+    private void decodeStat(Position position, ByteBuf buf) {
+
+        buf.readUnsignedIntLE(); // ACC ON time
+        buf.readUnsignedIntLE(); // UTC time
+        position.set(Position.KEY_ODOMETER, buf.readUnsignedIntLE());
+        position.set(Position.KEY_ODOMETER_TRIP, buf.readUnsignedIntLE());
+        position.set(Position.KEY_FUEL_CONSUMPTION, buf.readUnsignedIntLE());
+        buf.readUnsignedShortLE(); // current fuel consumption
+        position.set(Position.KEY_STATUS, buf.readUnsignedIntLE());
+        buf.skipBytes(8);
+    }
+
+    private void sendResponse(
+            Channel channel, SocketAddress remoteAddress,
+            int version, ByteBuf id, short type, ByteBuf content) {
+
+        if (channel != null) {
+            int length = 2 + 2 + 1 + id.readableBytes() + 2 + 2 + 2;
+            if (content != null) {
+                length += content.readableBytes();
+            }
+
+            ByteBuf response = Unpooled.buffer(length);
+            response.writeByte('@'); response.writeByte('@');
+            response.writeShortLE(length);
+            response.writeByte(version);
+            response.writeBytes(id);
+            response.writeShort(type);
+            if (content != null) {
+                response.writeBytes(content);
+                content.release();
+            }
+            response.writeShortLE(
+                    Checksum.crc16(Checksum.CRC16_X25, response.nioBuffer(0, response.writerIndex())));
+            response.writeByte(0x0D); response.writeByte(0x0A);
+            channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
+        }
+    }
+
+    private void sendResponse(
+            Channel channel, SocketAddress remoteAddress, ByteBuf id, short type) {
+
+        if (channel != null) {
+            int length = 2 + 2 + id.readableBytes() + 2 + 4 + 8 + 2 + 2;
+
+            ByteBuf response = Unpooled.buffer(length);
+            response.writeByte('@'); response.writeByte('@');
+            response.writeShortLE(length);
+            response.writeBytes(id);
+            response.writeShort(type);
+            response.writeIntLE(0);
+            for (int i = 0; i < 8; i++) {
+                response.writeByte(0xff);
+            }
+            response.writeShortLE(
+                    Checksum.crc16(Checksum.CRC16_X25, response.nioBuffer(0, response.writerIndex())));
+            response.writeByte(0x0D); response.writeByte(0x0A);
+            channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
+        }
+    }
+
+    private void decodeAlarm(Position position, int alarm) {
+        switch (alarm) {
+            case 0x01:
+                position.set(Position.KEY_ALARM, Position.ALARM_OVERSPEED);
+                break;
+            case 0x02:
+                position.set(Position.KEY_ALARM, Position.ALARM_LOW_POWER);
+                break;
+            case 0x03:
+                position.set(Position.KEY_ALARM, Position.ALARM_TEMPERATURE);
+                break;
+            case 0x04:
+                position.set(Position.KEY_ALARM, Position.ALARM_ACCELERATION);
+                break;
+            case 0x05:
+                position.set(Position.KEY_ALARM, Position.ALARM_BRAKING);
+                break;
+            case 0x06:
+                position.set(Position.KEY_ALARM, Position.ALARM_IDLE);
+                break;
+            case 0x07:
+                position.set(Position.KEY_ALARM, Position.ALARM_TOW);
+                break;
+            case 0x08:
+                position.set(Position.KEY_ALARM, Position.ALARM_HIGH_RPM);
+                break;
+            case 0x09:
+                position.set(Position.KEY_ALARM, Position.ALARM_POWER_ON);
+                break;
+            case 0x0B:
+                position.set(Position.KEY_ALARM, Position.ALARM_LANE_CHANGE);
+                break;
+            case 0x0C:
+                position.set(Position.KEY_ALARM, Position.ALARM_CORNERING);
+                break;
+            case 0x0E:
+                position.set(Position.KEY_ALARM, Position.ALARM_POWER_OFF);
+                break;
+            case 0x16:
+                position.set(Position.KEY_IGNITION, true);
+                break;
+            case 0x17:
+                position.set(Position.KEY_IGNITION, false);
+                break;
+            default:
+                break;
+        }
+    }
+
+    private Object decodeSc(
+            Channel channel, SocketAddress remoteAddress, ByteBuf buf,
+            int version, ByteBuf id, short type, DeviceSession deviceSession) {
+
+        if (type == MSG_SC_HEARTBEAT) {
+
+            sendResponse(channel, remoteAddress, version, id, MSG_SC_HEARTBEAT_RESPONSE, null);
+
+        } else if (type == MSG_SC_LOGIN || type == MSG_SC_LOGOUT || type == MSG_SC_GPS
+                || type == MSG_SC_ALARM || type == MSG_SC_CURRENT_LOCATION || type == MSG_SC_FUEL) {
+
+            if (type == MSG_SC_LOGIN) {
+                ByteBuf response = Unpooled.buffer(10);
+                response.writeIntLE(0xFFFFFFFF);
+                response.writeShortLE(0);
+                response.writeIntLE((int) (System.currentTimeMillis() / 1000));
+                sendResponse(channel, remoteAddress, version, id, MSG_SC_LOGIN_RESPONSE, response);
+            }
+
+            if (type == MSG_SC_GPS) {
+                buf.readUnsignedByte(); // historical
+            } else if (type == MSG_SC_ALARM) {
+                buf.readUnsignedIntLE(); // alarm
+            } else if (type == MSG_SC_CURRENT_LOCATION) {
+                buf.readUnsignedShortLE();
+            }
+
+            buf.readUnsignedIntLE(); // ACC ON time
+            buf.readUnsignedIntLE(); // UTC time
+            long odometer = buf.readUnsignedIntLE();
+            long tripOdometer = buf.readUnsignedIntLE();
+            long fuelConsumption = buf.readUnsignedIntLE();
+            buf.readUnsignedShortLE(); // current fuel consumption
+            long status = buf.readUnsignedIntLE();
+            buf.skipBytes(8);
+
+            int count = buf.readUnsignedByte();
+
+            List<Position> positions = new LinkedList<>();
+
+            for (int i = 0; i < count; i++) {
+                Position position = readPosition(deviceSession, buf);
+                position.set(Position.KEY_ODOMETER, odometer);
+                position.set(Position.KEY_ODOMETER_TRIP, tripOdometer);
+                position.set(Position.KEY_FUEL_CONSUMPTION, fuelConsumption);
+                position.set(Position.KEY_STATUS, status);
+                positions.add(position);
+            }
+
+            if (type == MSG_SC_ALARM) {
+                int alarmCount = buf.readUnsignedByte();
+                for (int i = 0; i < alarmCount; i++) {
+                    if (buf.readUnsignedByte() != 0) {
+                        int alarm = buf.readUnsignedByte();
+                        for (Position position : positions) {
+                            decodeAlarm(position, alarm);
+                        }
+                        buf.readUnsignedShortLE(); // description
+                        buf.readUnsignedShortLE(); // threshold
+                    }
+                }
+            } else if (type == MSG_SC_FUEL) {
+                for (Position position : positions) {
+                    position.set(Position.PREFIX_ADC + 1, buf.readUnsignedShortLE());
+                }
+            }
+
+            if (!positions.isEmpty()) {
+                return positions;
+            }
+
+        } else if (type == MSG_SC_GPS_SLEEP) {
+
+            buf.readUnsignedIntLE(); // device time
+
+            return readPosition(deviceSession, buf);
+
+        } else if (type == MSG_SC_AGPS_REQUEST) {
+
+            return readPosition(deviceSession, buf);
+
+        } else if (type == MSG_SC_PID_DATA) {
+
+            Position position = createPosition(deviceSession);
+
+            decodeStat(position, buf);
+
+            buf.readUnsignedShortLE(); // sample rate
+            decodeObd(position, buf, true);
+
+            return position;
+
+        } else if (type == MSG_SC_DTCS_PASSENGER) {
+
+            Position position = createPosition(deviceSession);
+
+            decodeStat(position, buf);
+
+            buf.readUnsignedByte(); // flag
+            position.add(ObdDecoder.decodeCodes(ByteBufUtil.hexDump(buf.readSlice(buf.readUnsignedByte()))));
+
+            return position;
+
+        } else if (type == MSG_SC_OBD_DATA) {
+
+            Position position = createPosition(deviceSession);
+
+            decodeStat(position, buf);
+
+            buf.readUnsignedByte(); // flag
+            decodeObd(position, buf, false);
+
+            return position;
+
+        } else if (type == MSG_SC_CELL) {
+
+            Position position = createPosition(deviceSession);
+
+            decodeStat(position, buf);
+
+            position.setNetwork(new Network(
+                    CellTower.fromLacCid(buf.readUnsignedShortLE(), buf.readUnsignedShortLE())));
+
+            return position;
+
+        } else if (type == MSG_SC_QUERY_RESPONSE) {
+
+            Position position = createPosition(deviceSession);
+
+            buf.readUnsignedShortLE(); // index
+            buf.readUnsignedByte(); // response count
+            buf.readUnsignedByte(); // response index
+
+            int failureCount = buf.readUnsignedByte();
+            for (int i = 0; i < failureCount; i++) {
+                buf.readUnsignedShortLE(); // tag
+            }
+
+            int successCount = buf.readUnsignedByte();
+            for (int i = 0; i < successCount; i++) {
+                buf.readUnsignedShortLE(); // tag
+                position.set(Position.KEY_RESULT,
+                        buf.readSlice(buf.readUnsignedShortLE()).toString(StandardCharsets.US_ASCII));
+            }
+
+            return position;
+
+        }
+
+        return null;
+    }
+
+    private Object decodeCc(
+            Channel channel, SocketAddress remoteAddress, ByteBuf buf,
+            int version, ByteBuf id, short type, DeviceSession deviceSession) {
+
+        if (type == MSG_CC_HEARTBEAT) {
+
+            sendResponse(channel, remoteAddress, version, id, MSG_CC_HEARTBEAT_RESPONSE, null);
+
+            buf.readUnsignedByte(); // 0x01 for history
+            int count = buf.readUnsignedByte();
+
+            List<Position> positions = new LinkedList<>();
+
+            for (int i = 0; i < count; i++) {
+                Position position = readPosition(deviceSession, buf);
+
+                position.set(Position.KEY_STATUS, buf.readUnsignedIntLE());
+                position.set(Position.KEY_BATTERY, buf.readUnsignedByte());
+                position.set(Position.KEY_ODOMETER, buf.readUnsignedIntLE());
+
+                buf.readUnsignedByte(); // geo-fencing id
+                buf.readUnsignedByte(); // geo-fencing flags
+                buf.readUnsignedByte(); // additional flags
+
+                position.setNetwork(new Network(
+                        CellTower.fromLacCid(buf.readUnsignedShortLE(), buf.readUnsignedShortLE())));
+
+                positions.add(position);
+            }
+
+            return positions;
+
+        } else if (type == MSG_CC_LOGIN) {
+
+            sendResponse(channel, remoteAddress, version, id, MSG_CC_LOGIN_RESPONSE, null);
+
+            Position position = readPosition(deviceSession, buf);
+
+            position.set(Position.KEY_STATUS, buf.readUnsignedIntLE());
+            position.set(Position.KEY_BATTERY, buf.readUnsignedByte());
+            position.set(Position.KEY_ODOMETER, buf.readUnsignedIntLE());
+
+            buf.readUnsignedByte(); // geo-fencing id
+            buf.readUnsignedByte(); // geo-fencing flags
+            buf.readUnsignedByte(); // additional flags
+
+            // GSM_CELL_CODE
+            // STR_Z - firmware version
+            // STR_Z - hardware version
+
+            return position;
+
+        }
+
+        return null;
+    }
+
+    private Object decodeMpip(
+            Channel channel, SocketAddress remoteAddress, ByteBuf buf,
+            int version, ByteBuf id, short type, DeviceSession deviceSession) {
+
+        if (type == 0x4001) {
+
+            sendResponse(channel, remoteAddress, version, id, (short) type, null);
+
+            return readPosition(deviceSession, buf);
+
+        } else if (type == 0x2001) {
+
+            sendResponse(channel, remoteAddress, id, (short) 0x1001);
+
+            buf.readUnsignedIntLE(); // index
+            buf.readUnsignedIntLE(); // unix time
+            buf.readUnsignedByte();
+
+            return readPosition(deviceSession, buf);
+
+        } else if (type == 0x4201 || type == 0x4202 || type == 0x4206) {
+
+            return readPosition(deviceSession, buf);
+
+        } else if (type == 0x4204) {
+
+            List<Position> positions = new LinkedList<>();
+
+            for (int i = 0; i < 8; i++) {
+                Position position = readPosition(deviceSession, buf);
+                buf.skipBytes(31);
+                positions.add(position);
+            }
+
+            return positions;
+
+        }
+
+        return null;
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        int header = buf.readUnsignedShortLE();
+        buf.readUnsignedShortLE(); // length
+
+        int version = -1;
+        if (header == 0x4040) {
+            version = buf.readUnsignedByte();
+        }
+
+        ByteBuf id = buf.readSlice(20);
+        short type = buf.readShort();
+
+        DeviceSession deviceSession = getDeviceSession(
+                channel, remoteAddress, id.toString(StandardCharsets.US_ASCII).trim());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        switch (version) {
+            case -1:
+                return decodeMpip(channel, remoteAddress, buf, version, id, type, deviceSession);
+            case 3:
+            case 4:
+                return decodeSc(channel, remoteAddress, buf, version, id, type, deviceSession);
+            default:
+                return decodeCc(channel, remoteAddress, buf, version, id, type, deviceSession);
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/CastelProtocolEncoder.java b/src/main/java/org/traccar/protocol/CastelProtocolEncoder.java
new file mode 100644
index 000000000..e1f78e7c1
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/CastelProtocolEncoder.java
@@ -0,0 +1,70 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import org.traccar.BaseProtocolEncoder;
+import org.traccar.Context;
+import org.traccar.helper.Checksum;
+import org.traccar.model.Command;
+
+import java.nio.charset.StandardCharsets;
+
+public class CastelProtocolEncoder extends BaseProtocolEncoder {
+
+    private ByteBuf encodeContent(long deviceId, short type, ByteBuf content) {
+
+        ByteBuf buf = Unpooled.buffer(0);
+        String uniqueId = Context.getIdentityManager().getById(deviceId).getUniqueId();
+
+        buf.writeByte('@');
+        buf.writeByte('@');
+
+        buf.writeShortLE(2 + 2 + 1 + 20 + 2 + content.readableBytes() + 2 + 2); // length
+
+        buf.writeByte(1); // protocol version
+
+        buf.writeBytes(uniqueId.getBytes(StandardCharsets.US_ASCII));
+        buf.writeZero(20 - uniqueId.length());
+
+        buf.writeShort(type);
+        buf.writeBytes(content);
+
+        buf.writeShortLE(Checksum.crc16(Checksum.CRC16_X25, buf.nioBuffer()));
+
+        buf.writeByte('\r');
+        buf.writeByte('\n');
+
+        return buf;
+    }
+
+    @Override
+    protected Object encodeCommand(Command command) {
+        ByteBuf content = Unpooled.buffer(0);
+        switch (command.getType()) {
+            case Command.TYPE_ENGINE_STOP:
+                content.writeByte(1);
+                return encodeContent(command.getDeviceId(), CastelProtocolDecoder.MSG_CC_PETROL_CONTROL, content);
+            case Command.TYPE_ENGINE_RESUME:
+                content.writeByte(0);
+                return encodeContent(command.getDeviceId(), CastelProtocolDecoder.MSG_CC_PETROL_CONTROL, content);
+            default:
+                return null;
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/CautelaProtocol.java b/src/main/java/org/traccar/protocol/CautelaProtocol.java
new file mode 100644
index 000000000..452bdf8d4
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/CautelaProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LineBasedFrameDecoder;
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class CautelaProtocol extends BaseProtocol {
+
+    public CautelaProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LineBasedFrameDecoder(1024));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new CautelaProtocolDecoder(CautelaProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/CautelaProtocolDecoder.java b/src/main/java/org/traccar/protocol/CautelaProtocolDecoder.java
new file mode 100644
index 000000000..bddf19b41
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/CautelaProtocolDecoder.java
@@ -0,0 +1,78 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class CautelaProtocolDecoder extends BaseProtocolDecoder {
+
+    public CautelaProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .number("(d+),")                     // type
+            .number("(d+),")                     // imei
+            .number("(dd),(dd),(dd),")           // date (ddmmyy)
+            .number("(-?d+.d+),")                // latitude
+            .number("(-?d+.d+),")                // longitude
+            .number("(dd)(dd),")                 // time (hhmm)
+            .any()
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        parser.next(); // type
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        DateBuilder dateBuilder = new DateBuilder();
+        dateBuilder.setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt());
+
+        position.setValid(true);
+        position.setLatitude(parser.nextDouble());
+        position.setLongitude(parser.nextDouble());
+
+        dateBuilder.setHour(parser.nextInt()).setMinute(parser.nextInt());
+        position.setTime(dateBuilder.getDate());
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/CellocatorFrameDecoder.java b/src/main/java/org/traccar/protocol/CellocatorFrameDecoder.java
new file mode 100644
index 000000000..7d5499d92
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/CellocatorFrameDecoder.java
@@ -0,0 +1,66 @@
+/*
+ * Copyright 2013 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+import org.traccar.BaseFrameDecoder;
+
+public class CellocatorFrameDecoder extends BaseFrameDecoder {
+
+    private static final int MESSAGE_MINIMUM_LENGTH = 15;
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+        if (buf.readableBytes() < MESSAGE_MINIMUM_LENGTH) {
+            return null;
+        }
+
+        int length = 0;
+        int type = buf.getUnsignedByte(4);
+        switch (type) {
+            case CellocatorProtocolDecoder.MSG_CLIENT_STATUS:
+                length = 70;
+                break;
+            case CellocatorProtocolDecoder.MSG_CLIENT_PROGRAMMING:
+                length = 31;
+                break;
+            case CellocatorProtocolDecoder.MSG_CLIENT_SERIAL_LOG:
+                length = 70;
+                break;
+            case CellocatorProtocolDecoder.MSG_CLIENT_SERIAL:
+                if (buf.readableBytes() >= 19) {
+                    length = 19 + buf.getUnsignedShortLE(16);
+                }
+                break;
+            case CellocatorProtocolDecoder.MSG_CLIENT_MODULAR:
+                length = 15 + buf.getUnsignedByte(13);
+                break;
+            default:
+                break;
+        }
+
+        if (length > 0 && buf.readableBytes() >= length) {
+            return buf.readRetainedSlice(length);
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/CellocatorProtocol.java b/src/main/java/org/traccar/protocol/CellocatorProtocol.java
new file mode 100644
index 000000000..a52170dc9
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/CellocatorProtocol.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+import org.traccar.model.Command;
+
+public class CellocatorProtocol extends BaseProtocol {
+
+    public CellocatorProtocol() {
+        setSupportedDataCommands(
+                Command.TYPE_OUTPUT_CONTROL);
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CellocatorFrameDecoder());
+                pipeline.addLast(new CellocatorProtocolEncoder());
+                pipeline.addLast(new CellocatorProtocolDecoder(CellocatorProtocol.this));
+            }
+        });
+        addServer(new TrackerServer(true, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CellocatorProtocolEncoder());
+                pipeline.addLast(new CellocatorProtocolDecoder(CellocatorProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/CellocatorProtocolDecoder.java b/src/main/java/org/traccar/protocol/CellocatorProtocolDecoder.java
new file mode 100644
index 000000000..d23f76a93
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/CellocatorProtocolDecoder.java
@@ -0,0 +1,177 @@
+/*
+ * Copyright 2013 - 2019 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+
+public class CellocatorProtocolDecoder extends BaseProtocolDecoder {
+
+    public CellocatorProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    static final int MSG_CLIENT_STATUS = 0;
+    static final int MSG_CLIENT_PROGRAMMING = 3;
+    static final int MSG_CLIENT_SERIAL_LOG = 7;
+    static final int MSG_CLIENT_SERIAL = 8;
+    static final int MSG_CLIENT_MODULAR = 9;
+
+    public static final int MSG_SERVER_ACKNOWLEDGE = 4;
+
+    private byte commandCount;
+
+    private void sendReply(Channel channel, SocketAddress remoteAddress, long deviceId, byte packetNumber) {
+        if (channel != null) {
+            ByteBuf reply = Unpooled.buffer(28);
+            reply.writeByte('M');
+            reply.writeByte('C');
+            reply.writeByte('G');
+            reply.writeByte('P');
+            reply.writeByte(MSG_SERVER_ACKNOWLEDGE);
+            reply.writeIntLE((int) deviceId);
+            reply.writeByte(commandCount++);
+            reply.writeIntLE(0); // authentication code
+            reply.writeByte(0);
+            reply.writeByte(packetNumber);
+            reply.writeZero(11);
+
+            byte checksum = 0;
+            for (int i = 4; i < 27; i++) {
+                checksum += reply.getByte(i);
+            }
+            reply.writeByte(checksum);
+
+            channel.writeAndFlush(new NetworkMessage(reply, remoteAddress));
+        }
+    }
+
+    private String decodeAlarm(short reason) {
+        switch (reason) {
+            case 70:
+                return Position.ALARM_SOS;
+            case 80:
+                return Position.ALARM_POWER_CUT;
+            case 81:
+                return Position.ALARM_LOW_POWER;
+            default:
+                return null;
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        boolean alternative = buf.getByte(buf.readerIndex() + 3) != 'P';
+
+        buf.skipBytes(4); // system code
+        int type = buf.readUnsignedByte();
+        long deviceUniqueId = buf.readUnsignedIntLE();
+
+        if (type != MSG_CLIENT_SERIAL) {
+            buf.readUnsignedShortLE(); // communication control
+        }
+        byte packetNumber = buf.readByte();
+
+        sendReply(channel, remoteAddress, deviceUniqueId, packetNumber);
+
+        if (type == MSG_CLIENT_STATUS) {
+
+            Position position = new Position(getProtocolName());
+
+            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, String.valueOf(deviceUniqueId));
+            if (deviceSession == null) {
+                return null;
+            }
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            position.set(Position.KEY_VERSION_HW, buf.readUnsignedByte());
+            position.set(Position.KEY_VERSION_FW, buf.readUnsignedByte());
+            buf.readUnsignedByte(); // protocol version
+
+            position.set(Position.KEY_STATUS, buf.readUnsignedByte() & 0x0f);
+
+            buf.readUnsignedByte(); // operator / configuration flags
+            buf.readUnsignedByte(); // reason data
+            position.set(Position.KEY_ALARM, decodeAlarm(buf.readUnsignedByte()));
+
+            position.set("mode", buf.readUnsignedByte());
+            position.set(Position.KEY_INPUT, buf.readUnsignedIntLE());
+
+            if (alternative) {
+                buf.readUnsignedByte(); // input
+                position.set(Position.PREFIX_ADC + 1, buf.readUnsignedShortLE());
+                position.set(Position.PREFIX_ADC + 2, buf.readUnsignedShortLE());
+            } else {
+                buf.readUnsignedByte(); // operator
+                position.set(Position.PREFIX_ADC + 1, buf.readUnsignedIntLE());
+            }
+
+            position.set(Position.KEY_ODOMETER, buf.readUnsignedMediumLE());
+
+            buf.skipBytes(6); // multi-purpose data
+            buf.readUnsignedShortLE(); // fix time
+            buf.readUnsignedByte(); // location status
+            buf.readUnsignedByte(); // mode 1
+            buf.readUnsignedByte(); // mode 2
+
+            position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
+
+            position.setValid(true);
+
+            if (alternative) {
+                position.setLongitude(buf.readIntLE() / 10000000.0);
+                position.setLatitude(buf.readIntLE() / 10000000.0);
+            } else {
+                position.setLongitude(buf.readIntLE() / Math.PI * 180 / 100000000);
+                position.setLatitude(buf.readIntLE() / Math.PI * 180 / 100000000);
+            }
+
+            position.setAltitude(buf.readIntLE() * 0.01);
+
+            if (alternative) {
+                position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedIntLE()));
+                position.setCourse(buf.readUnsignedShortLE() / 1000.0);
+            } else {
+                position.setSpeed(UnitsConverter.knotsFromMps(buf.readUnsignedIntLE() * 0.01));
+                position.setCourse(buf.readUnsignedShortLE() / Math.PI * 180.0 / 1000.0);
+            }
+
+            DateBuilder dateBuilder = new DateBuilder()
+                    .setTimeReverse(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte())
+                    .setDateReverse(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedShortLE());
+            position.setTime(dateBuilder.getDate());
+
+            return position;
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/CellocatorProtocolEncoder.java b/src/main/java/org/traccar/protocol/CellocatorProtocolEncoder.java
new file mode 100644
index 000000000..0382dbbc7
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/CellocatorProtocolEncoder.java
@@ -0,0 +1,66 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import org.traccar.BaseProtocolEncoder;
+import org.traccar.model.Command;
+
+public class CellocatorProtocolEncoder extends BaseProtocolEncoder {
+
+    private ByteBuf encodeContent(long deviceId, int command, int data1, int data2) {
+
+        ByteBuf buf = Unpooled.buffer(0);
+        buf.writeByte('M');
+        buf.writeByte('C');
+        buf.writeByte('G');
+        buf.writeByte('P');
+        buf.writeByte(0);
+        buf.writeIntLE(Integer.parseInt(getUniqueId(deviceId)));
+        buf.writeByte(0); // command numerator
+        buf.writeIntLE(0); // authentication code
+        buf.writeByte(command);
+        buf.writeByte(command);
+        buf.writeByte(data1);
+        buf.writeByte(data1);
+        buf.writeByte(data2);
+        buf.writeByte(data2);
+        buf.writeIntLE(0); // command specific data
+
+        byte checksum = 0;
+        for (int i = 4; i < buf.writerIndex(); i++) {
+            checksum += buf.getByte(i);
+        }
+        buf.writeByte(checksum);
+
+        return buf;
+    }
+
+    @Override
+    protected Object encodeCommand(Command command) {
+
+        switch (command.getType()) {
+            case Command.TYPE_OUTPUT_CONTROL:
+                int data = Integer.parseInt(command.getString(Command.KEY_DATA)) << 4
+                        + command.getInteger(Command.KEY_INDEX);
+                return encodeContent(command.getDeviceId(), 0x03, data, 0);
+            default:
+                return null;
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/CguardProtocol.java b/src/main/java/org/traccar/protocol/CguardProtocol.java
new file mode 100644
index 000000000..9157ca35c
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/CguardProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LineBasedFrameDecoder;
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class CguardProtocol extends BaseProtocol {
+
+    public CguardProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LineBasedFrameDecoder(1024));
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new CguardProtocolDecoder(CguardProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/CguardProtocolDecoder.java b/src/main/java/org/traccar/protocol/CguardProtocolDecoder.java
new file mode 100644
index 000000000..d934921f1
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/CguardProtocolDecoder.java
@@ -0,0 +1,147 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class CguardProtocolDecoder extends BaseProtocolDecoder {
+
+    public CguardProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN_NV = new PatternBuilder()
+            .text("NV:")
+            .number("(dd)(dd)(dd) ")             // date (yymmdd)
+            .number("(dd)(dd)(dd)")              // time (hhmmss)
+            .number(":(-?d+.d+)")                // longitude
+            .number(":(-?d+.d+)")                // latitude
+            .number(":(d+.?d*)")                 // speed
+            .number(":(?:NAN|(d+.?d*))")         // accuracy
+            .number(":(?:NAN|(d+.?d*))")         // course
+            .number(":(?:NAN|(d+.?d*))").optional() // altitude
+            .compile();
+
+    private static final Pattern PATTERN_BC = new PatternBuilder()
+            .text("BC:")
+            .number("(dd)(dd)(dd) ")             // date (yymmdd)
+            .number("(dd)(dd)(dd):")             // time (hhmmss)
+            .expression("(.+)")                  // data
+            .compile();
+
+    private Position decodePosition(DeviceSession deviceSession, String sentence) {
+
+        Parser parser = new Parser(PATTERN_NV, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setTime(parser.nextDateTime());
+
+        position.setValid(true);
+        position.setLatitude(parser.nextDouble(0));
+        position.setLongitude(parser.nextDouble(0));
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
+
+        position.setAccuracy(parser.nextDouble(0));
+
+        position.setCourse(parser.nextDouble(0));
+        position.setAltitude(parser.nextDouble(0));
+
+        return position;
+    }
+
+    private Position decodeStatus(DeviceSession deviceSession, String sentence) {
+
+        Parser parser = new Parser(PATTERN_BC, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        getLastLocation(position, parser.nextDateTime());
+
+        String[] data = parser.next().split(":");
+        for (int i = 0; i < data.length / 2; i++) {
+            String key = data[i * 2];
+            String value = data[i * 2 + 1];
+            switch (key) {
+                case "CSQ1":
+                    position.set(Position.KEY_RSSI, Integer.parseInt(value));
+                    break;
+                case "NSQ1":
+                    position.set(Position.KEY_SATELLITES, Integer.parseInt(value));
+                    break;
+                case "BAT1":
+                    if (value.contains(".")) {
+                        position.set(Position.KEY_BATTERY, Double.parseDouble(value));
+                    } else {
+                        position.set(Position.KEY_BATTERY_LEVEL, Integer.parseInt(value));
+                    }
+                    break;
+                case "PWR1":
+                    position.set(Position.KEY_POWER, Double.parseDouble(value));
+                    break;
+                default:
+                    position.set(key.toLowerCase(), value);
+                    break;
+            }
+        }
+
+        return position;
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        String sentence = (String) msg;
+
+        if (sentence.startsWith("ID:") || sentence.startsWith("IDRO:")) {
+            getDeviceSession(channel, remoteAddress, sentence.substring(sentence.indexOf(':') + 1));
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        if (sentence.startsWith("NV:")) {
+            return decodePosition(deviceSession, sentence);
+        } else if (sentence.startsWith("BC:")) {
+            return decodeStatus(deviceSession, sentence);
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/CityeasyProtocol.java b/src/main/java/org/traccar/protocol/CityeasyProtocol.java
new file mode 100644
index 000000000..f4b49c9ff
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/CityeasyProtocol.java
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LengthFieldBasedFrameDecoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+import org.traccar.model.Command;
+
+public class CityeasyProtocol extends BaseProtocol {
+
+    public CityeasyProtocol() {
+        setSupportedDataCommands(
+                Command.TYPE_POSITION_SINGLE,
+                Command.TYPE_POSITION_PERIODIC,
+                Command.TYPE_POSITION_STOP,
+                Command.TYPE_SET_TIMEZONE);
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LengthFieldBasedFrameDecoder(1024, 2, 2, -4, 0));
+                pipeline.addLast(new CityeasyProtocolEncoder());
+                pipeline.addLast(new CityeasyProtocolDecoder(CityeasyProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/CityeasyProtocolDecoder.java b/src/main/java/org/traccar/protocol/CityeasyProtocolDecoder.java
new file mode 100644
index 000000000..9c4c7e11d
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/CityeasyProtocolDecoder.java
@@ -0,0 +1,127 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.ByteBufUtil;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.Checksum;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.CellTower;
+import org.traccar.model.Network;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.regex.Pattern;
+
+public class CityeasyProtocolDecoder extends BaseProtocolDecoder {
+
+    public CityeasyProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .groupBegin()
+            .number("(dddd)(dd)(dd)")            // date (yyyymmdd)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .number("([AV]),")                   // validity
+            .number("(d+),")                     // satellites
+            .number("([NS]),(d+.d+),")           // latitude
+            .number("([EW]),(d+.d+),")           // longitude
+            .number("(d+.d),")                   // speed
+            .number("(d+.d),")                   // hdop
+            .number("(d+.d)")                    // altitude
+            .groupEnd("?").text(";")
+            .number("(d+),")                     // mcc
+            .number("(d+),")                     // mnc
+            .number("(d+),")                     // lac
+            .number("(d+)")                      // cell
+            .any()
+            .compile();
+
+    public static final int MSG_ADDRESS_REQUEST = 0x0001;
+    public static final int MSG_STATUS = 0x0002;
+    public static final int MSG_LOCATION_REPORT = 0x0003;
+    public static final int MSG_LOCATION_REQUEST = 0x0004;
+    public static final int MSG_LOCATION_INTERVAL = 0x0005;
+    public static final int MSG_PHONE_NUMBER = 0x0006;
+    public static final int MSG_MONITORING = 0x0007;
+    public static final int MSG_TIMEZONE = 0x0008;
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        buf.skipBytes(2); // header
+        buf.readUnsignedShort(); // length
+
+        String imei = ByteBufUtil.hexDump(buf.readSlice(7));
+        DeviceSession deviceSession = getDeviceSession(
+                channel, remoteAddress, imei, imei + Checksum.luhn(Long.parseLong(imei)));
+        if (deviceSession == null) {
+            return null;
+        }
+
+        int type = buf.readUnsignedShort();
+
+        if (type == MSG_LOCATION_REPORT || type == MSG_LOCATION_REQUEST) {
+
+            String sentence = buf.toString(buf.readerIndex(), buf.readableBytes() - 8, StandardCharsets.US_ASCII);
+            Parser parser = new Parser(PATTERN, sentence);
+            if (!parser.matches()) {
+                return null;
+            }
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            if (parser.hasNext(15)) {
+
+                position.setTime(parser.nextDateTime());
+
+                position.setValid(parser.next().equals("A"));
+                position.set(Position.KEY_SATELLITES, parser.nextInt());
+
+                position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG));
+                position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG));
+
+                position.setSpeed(parser.nextDouble(0));
+                position.set(Position.KEY_HDOP, parser.nextDouble(0));
+                position.setAltitude(parser.nextDouble(0));
+
+            } else {
+
+                getLastLocation(position, null);
+
+            }
+
+            position.setNetwork(new Network(CellTower.from(
+                    parser.nextInt(0), parser.nextInt(0), parser.nextInt(0), parser.nextInt(0))));
+
+            return position;
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/CityeasyProtocolEncoder.java b/src/main/java/org/traccar/protocol/CityeasyProtocolEncoder.java
new file mode 100644
index 000000000..350fdf0ab
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/CityeasyProtocolEncoder.java
@@ -0,0 +1,73 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import java.util.TimeZone;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import org.traccar.BaseProtocolEncoder;
+import org.traccar.helper.Checksum;
+import org.traccar.model.Command;
+
+public class CityeasyProtocolEncoder extends BaseProtocolEncoder {
+
+    private ByteBuf encodeContent(int type, ByteBuf content) {
+
+        ByteBuf buf = Unpooled.buffer();
+
+        buf.writeByte('S');
+        buf.writeByte('S');
+        buf.writeShort(2 + 2 + 2 + content.readableBytes() + 4 + 2 + 2);
+        buf.writeShort(type);
+        buf.writeBytes(content);
+        buf.writeInt(0x0B);
+        buf.writeShort(Checksum.crc16(Checksum.CRC16_KERMIT, buf.nioBuffer()));
+        buf.writeByte('\r');
+        buf.writeByte('\n');
+
+        return buf;
+    }
+
+    @Override
+    protected Object encodeCommand(Command command) {
+
+        ByteBuf content = Unpooled.buffer();
+
+        switch (command.getType()) {
+            case Command.TYPE_POSITION_SINGLE:
+                return encodeContent(CityeasyProtocolDecoder.MSG_LOCATION_REQUEST, content);
+            case Command.TYPE_POSITION_PERIODIC:
+                content.writeShort(command.getInteger(Command.KEY_FREQUENCY));
+                return encodeContent(CityeasyProtocolDecoder.MSG_LOCATION_INTERVAL, content);
+            case Command.TYPE_POSITION_STOP:
+                content.writeShort(0);
+                return encodeContent(CityeasyProtocolDecoder.MSG_LOCATION_INTERVAL, content);
+            case Command.TYPE_SET_TIMEZONE:
+                int timezone = TimeZone.getTimeZone(command.getString(Command.KEY_TIMEZONE)).getRawOffset() / 60000;
+                if (timezone < 0) {
+                    content.writeByte(1);
+                } else {
+                    content.writeByte(0);
+                }
+                content.writeShort(Math.abs(timezone));
+                return encodeContent(CityeasyProtocolDecoder.MSG_TIMEZONE, content);
+            default:
+                return null;
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/ContinentalProtocol.java b/src/main/java/org/traccar/protocol/ContinentalProtocol.java
new file mode 100644
index 000000000..bc7928fba
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/ContinentalProtocol.java
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LengthFieldBasedFrameDecoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class ContinentalProtocol extends BaseProtocol {
+
+    public ContinentalProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LengthFieldBasedFrameDecoder(1024, 2, 2, -4, 0));
+                pipeline.addLast(new ContinentalProtocolDecoder(ContinentalProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/ContinentalProtocolDecoder.java b/src/main/java/org/traccar/protocol/ContinentalProtocolDecoder.java
new file mode 100644
index 000000000..471afa0d6
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/ContinentalProtocolDecoder.java
@@ -0,0 +1,114 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.Date;
+
+public class ContinentalProtocolDecoder extends BaseProtocolDecoder {
+
+    public ContinentalProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    public static final int MSG_KEEPALIVE = 0x00;
+    public static final int MSG_STATUS = 0x02;
+    public static final int MSG_ACK = 0x06;
+    public static final int MSG_NACK = 0x15;
+
+    private double readCoordinate(ByteBuf buf, boolean extended) {
+        long value = buf.readUnsignedInt();
+        if (extended ? (value & 0x08000000) != 0 : (value & 0x00800000) != 0) {
+            value |= extended ? 0xF0000000 : 0xFF000000;
+        }
+        return (int) value / (extended ? 360000.0 : 3600.0);
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        buf.skipBytes(2); // header
+        buf.readUnsignedShort(); // length
+        buf.readUnsignedByte(); // software version
+
+        long serialNumber = buf.readUnsignedInt();
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, String.valueOf(serialNumber));
+        if (deviceSession == null) {
+            return null;
+        }
+
+        buf.readUnsignedByte(); // product
+
+        int type = buf.readUnsignedByte();
+
+        if (type == MSG_STATUS) {
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            position.setFixTime(new Date(buf.readUnsignedInt() * 1000L));
+
+            boolean extended = buf.getUnsignedByte(buf.readerIndex()) != 0;
+            position.setLatitude(readCoordinate(buf, extended));
+            position.setLongitude(readCoordinate(buf, extended));
+
+            position.setCourse(buf.readUnsignedShort());
+            position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShort()));
+
+            position.setValid(buf.readUnsignedByte() > 0);
+
+            position.setDeviceTime(new Date(buf.readUnsignedInt() * 1000L));
+
+            position.set(Position.KEY_EVENT, buf.readUnsignedShort());
+
+            int input = buf.readUnsignedShort();
+            position.set(Position.KEY_IGNITION, BitUtil.check(input, 0));
+            position.set(Position.KEY_INPUT, input);
+
+            position.set(Position.KEY_OUTPUT, buf.readUnsignedShort());
+            position.set(Position.KEY_BATTERY, buf.readUnsignedByte());
+            position.set(Position.KEY_DEVICE_TEMP, buf.readByte());
+
+            buf.readUnsignedShort(); // reserved
+
+            if (buf.readableBytes() > 4) {
+                position.set(Position.KEY_ODOMETER, buf.readUnsignedInt());
+            }
+
+            if (buf.readableBytes() > 4) {
+                position.set(Position.KEY_HOURS, UnitsConverter.msFromHours(buf.readUnsignedInt()));
+            }
+
+            return position;
+
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/CradlepointProtocol.java b/src/main/java/org/traccar/protocol/CradlepointProtocol.java
new file mode 100644
index 000000000..4a09e0311
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/CradlepointProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LineBasedFrameDecoder;
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class CradlepointProtocol extends BaseProtocol {
+
+    public CradlepointProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LineBasedFrameDecoder(1024));
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new CradlepointProtocolDecoder(CradlepointProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/CradlepointProtocolDecoder.java b/src/main/java/org/traccar/protocol/CradlepointProtocolDecoder.java
new file mode 100644
index 000000000..a282131ce
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/CradlepointProtocolDecoder.java
@@ -0,0 +1,95 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.Date;
+import java.util.regex.Pattern;
+
+public class CradlepointProtocolDecoder extends BaseProtocolDecoder {
+
+    public CradlepointProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .expression("([^,]+),")              // id
+            .number("(d{1,6}),")                 // time (hhmmss)
+            .number("(d+)(dd.d+),")              // latitude
+            .expression("([NS]),")
+            .number("(d+)(dd.d+),")              // longitude
+            .expression("([EW]),")
+            .number("(d+.d+)?,")                 // speed
+            .number("(d+.d+)?,")                 // course
+            .expression("([^,]+)?,")             // carrier
+            .expression("([^,]+)?,")             // serdis
+            .number("(-?d+)?,")                  // rsrp
+            .number("(-?d+)?,")                  // rssi
+            .number("(-?d+)?,")                  // rsrq
+            .expression("([^,]+)?,")             // ecio
+            .expression("([^,]+)?")              // wan ip
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        int time = parser.nextInt();
+        DateBuilder dateBuilder = new DateBuilder(new Date());
+        dateBuilder.setHour(time / 100 / 100);
+        dateBuilder.setMinute(time / 100 % 100);
+        dateBuilder.setSecond(time % 100);
+        position.setTime(dateBuilder.getDate());
+
+        position.setValid(true);
+        position.setLatitude(parser.nextCoordinate());
+        position.setLongitude(parser.nextCoordinate());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
+
+        position.set("carrid", parser.next());
+        position.set("serdis", parser.next());
+        position.set("rsrp", parser.nextInt());
+        position.set(Position.KEY_RSSI, parser.nextInt());
+        position.set("rsrq", parser.nextInt());
+        position.set("ecio", parser.next());
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/DishaProtocol.java b/src/main/java/org/traccar/protocol/DishaProtocol.java
new file mode 100644
index 000000000..38f49cc05
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/DishaProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LineBasedFrameDecoder;
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class DishaProtocol extends BaseProtocol {
+
+    public DishaProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LineBasedFrameDecoder(1024));
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new DishaProtocolDecoder(DishaProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/DishaProtocolDecoder.java b/src/main/java/org/traccar/protocol/DishaProtocolDecoder.java
new file mode 100644
index 000000000..3223988ab
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/DishaProtocolDecoder.java
@@ -0,0 +1,102 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class DishaProtocolDecoder extends BaseProtocolDecoder {
+
+    public DishaProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("$A#A#")
+            .number("(d+)#")                     // imei
+            .expression("([AVMX])#")             // validity
+            .number("(dd)(dd)(dd)#")             // time (hhmmss)
+            .number("(dd)(dd)(dd)#")             // date (ddmmyy)
+            .number("(dd)(dd.d+)#")              // latitude
+            .expression("([NS])#")
+            .number("(ddd)(dd.d+)#")             // longitude
+            .expression("([EW])#")
+            .number("(d+.d+)#")                  // speed
+            .number("(d+.d+)#")                  // course
+            .number("(d+)#")                     // satellites
+            .number("(d+.d+)#")                  // hdop
+            .number("(d+)#")                     // gsm
+            .expression("([012])#")              // power mode
+            .number("(d+)#")                     // battery
+            .number("(d+)#")                     // adc 1
+            .number("(d+)#")                     // adc 2
+            .number("d+.d+#")                    // day distance
+            .number("(d+.d+)#")                  // odometer
+            .expression("([01]+)")               // digital inputs
+            .text("*")
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setValid(parser.next().equals("A"));
+
+        position.setTime(parser.nextDateTime(Parser.DateTimeFormat.HMS_DMY));
+
+        position.setLatitude(parser.nextCoordinate());
+        position.setLongitude(parser.nextCoordinate());
+
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
+
+        position.set(Position.KEY_SATELLITES, parser.nextInt());
+        position.set(Position.KEY_HDOP, parser.nextDouble());
+        position.set(Position.KEY_RSSI, parser.nextDouble());
+        position.set(Position.KEY_CHARGE, parser.nextInt(0) == 2);
+        position.set(Position.KEY_BATTERY_LEVEL, parser.nextInt(0));
+
+        position.set(Position.PREFIX_ADC + 1, parser.nextInt(0));
+        position.set(Position.PREFIX_ADC + 2, parser.nextInt(0));
+
+        position.set(Position.KEY_ODOMETER, parser.nextDouble(0) * 1000);
+        position.set(Position.KEY_INPUT, parser.next());
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/DmtHttpProtocol.java b/src/main/java/org/traccar/protocol/DmtHttpProtocol.java
new file mode 100644
index 000000000..34568128f
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/DmtHttpProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.http.HttpObjectAggregator;
+import io.netty.handler.codec.http.HttpRequestDecoder;
+import io.netty.handler.codec.http.HttpResponseEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class DmtHttpProtocol extends BaseProtocol {
+
+    public DmtHttpProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new HttpResponseEncoder());
+                pipeline.addLast(new HttpRequestDecoder());
+                pipeline.addLast(new HttpObjectAggregator(65535));
+                pipeline.addLast(new DmtHttpProtocolDecoder(DmtHttpProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/DmtHttpProtocolDecoder.java b/src/main/java/org/traccar/protocol/DmtHttpProtocolDecoder.java
new file mode 100644
index 000000000..987361baf
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/DmtHttpProtocolDecoder.java
@@ -0,0 +1,133 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import io.netty.handler.codec.http.FullHttpRequest;
+import io.netty.handler.codec.http.HttpResponseStatus;
+import org.traccar.BaseHttpProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import javax.json.Json;
+import javax.json.JsonArray;
+import javax.json.JsonObject;
+import java.io.StringReader;
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.text.DateFormat;
+import java.text.SimpleDateFormat;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.TimeZone;
+
+public class DmtHttpProtocolDecoder extends BaseHttpProtocolDecoder {
+
+    public DmtHttpProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        FullHttpRequest request = (FullHttpRequest) msg;
+        JsonObject root = Json.createReader(
+                new StringReader(request.content().toString(StandardCharsets.US_ASCII))).readObject();
+
+        DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
+        dateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, root.getString("IMEI"));
+        if (deviceSession == null) {
+            sendResponse(channel, HttpResponseStatus.BAD_REQUEST);
+            return null;
+        }
+
+        List<Position> positions = new LinkedList<>();
+
+        JsonArray records = root.getJsonArray("Records");
+
+        for (int i = 0; i < records.size(); i++) {
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            JsonObject record = records.getJsonObject(i);
+
+            position.set(Position.KEY_INDEX, record.getInt("SeqNo"));
+            position.set(Position.KEY_EVENT, record.getInt("Reason"));
+
+            position.setDeviceTime(dateFormat.parse(record.getString("DateUTC")));
+
+            JsonArray fields = record.getJsonArray("Fields");
+
+            for (int j = 0; j < fields.size(); j++) {
+                JsonObject field = fields.getJsonObject(j);
+                switch (field.getInt("FType")) {
+                    case 0:
+                        position.setFixTime(dateFormat.parse(field.getString("GpsUTC")));
+                        position.setLatitude(field.getJsonNumber("Lat").doubleValue());
+                        position.setLongitude(field.getJsonNumber("Long").doubleValue());
+                        position.setAltitude(field.getInt("Alt"));
+                        position.setSpeed(UnitsConverter.knotsFromCps(field.getInt("Spd")));
+                        position.setCourse(field.getInt("Head"));
+                        position.setAccuracy(field.getInt("PosAcc"));
+                        position.setValid(field.getInt("GpsStat") > 0);
+                        break;
+                    case 2:
+                        int input = field.getInt("DIn");
+                        int output = field.getInt("DOut");
+
+                        position.set(Position.KEY_IGNITION, BitUtil.check(input, 0));
+
+                        position.set(Position.KEY_INPUT, input);
+                        position.set(Position.KEY_OUTPUT, output);
+                        position.set(Position.KEY_STATUS, field.getInt("DevStat"));
+                        break;
+                    case 6:
+                        JsonObject adc = field.getJsonObject("AnalogueData");
+                        if (adc.containsKey("1")) {
+                            position.set(Position.KEY_BATTERY, adc.getInt("1") * 0.001);
+                        }
+                        if (adc.containsKey("2")) {
+                            position.set(Position.KEY_POWER, adc.getInt("2") * 0.01);
+                        }
+                        if (adc.containsKey("3")) {
+                            position.set(Position.KEY_DEVICE_TEMP, adc.getInt("3") * 0.01);
+                        }
+                        if (adc.containsKey("4")) {
+                            position.set(Position.KEY_RSSI, adc.getInt("4"));
+                        }
+                        if (adc.containsKey("5")) {
+                            position.set("solarPower", adc.getInt("5") * 0.001);
+                        }
+                        break;
+                    default:
+                        break;
+                }
+            }
+
+            positions.add(position);
+        }
+
+        sendResponse(channel, HttpResponseStatus.OK);
+        return positions;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/DmtProtocol.java b/src/main/java/org/traccar/protocol/DmtProtocol.java
new file mode 100644
index 000000000..78a5243c0
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/DmtProtocol.java
@@ -0,0 +1,36 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LengthFieldBasedFrameDecoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+import java.nio.ByteOrder;
+public class DmtProtocol extends BaseProtocol {
+
+    public DmtProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LengthFieldBasedFrameDecoder(ByteOrder.LITTLE_ENDIAN, 1024, 3, 2, 0, 0, true));
+                pipeline.addLast(new DmtProtocolDecoder(DmtProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/DmtProtocolDecoder.java b/src/main/java/org/traccar/protocol/DmtProtocolDecoder.java
new file mode 100644
index 000000000..c04e90f1d
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/DmtProtocolDecoder.java
@@ -0,0 +1,289 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.Date;
+import java.util.LinkedList;
+import java.util.List;
+
+public class DmtProtocolDecoder extends BaseProtocolDecoder {
+
+    public DmtProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    public static final int MSG_HELLO = 0x00;
+    public static final int MSG_HELLO_RESPONSE = 0x01;
+    public static final int MSG_DATA_RECORD = 0x04;
+    public static final int MSG_COMMIT = 0x05;
+    public static final int MSG_COMMIT_RESPONSE = 0x06;
+    public static final int MSG_DATA_RECORD_64 = 0x10;
+
+    public static final int MSG_CANNED_REQUEST_1 = 0x14;
+    public static final int MSG_CANNED_RESPONSE_1 = 0x15;
+    public static final int MSG_CANNED_REQUEST_2 = 0x22;
+    public static final int MSG_CANNED_RESPONSE_2 = 0x23;
+
+    private void sendResponse(Channel channel, int type, ByteBuf content) {
+        if (channel != null) {
+            ByteBuf response = Unpooled.buffer();
+            response.writeByte(0x02); response.writeByte(0x55); // header
+            response.writeByte(type);
+            response.writeShortLE(content != null ? content.readableBytes() : 0);
+            if (content != null) {
+                response.writeBytes(content);
+                content.release();
+            }
+            channel.writeAndFlush(new NetworkMessage(response, channel.remoteAddress()));
+        }
+    }
+
+    private List<Position> decodeFixed64(Channel channel, SocketAddress remoteAddress, ByteBuf buf) {
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        List<Position> positions = new LinkedList<>();
+
+        while (buf.readableBytes() >= 64) {
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            buf.readByte(); // type
+
+            position.set(Position.KEY_INDEX, buf.readUnsignedIntLE());
+
+            long time = buf.readUnsignedIntLE();
+            position.setTime(new DateBuilder()
+                    .setYear((int) (2000 + (time & 0x3F)))
+                    .setMonth((int) (time >> 6) & 0xF)
+                    .setDay((int) (time >> 10) & 0x1F)
+                    .setHour((int) (time >> 15) & 0x1F)
+                    .setMinute((int) (time >> 20) & 0x3F)
+                    .setSecond((int) (time >> 26) & 0x3F)
+                    .getDate());
+
+            position.setLongitude(buf.readIntLE() * 0.0000001);
+            position.setLatitude(buf.readIntLE() * 0.0000001);
+            position.setSpeed(UnitsConverter.knotsFromCps(buf.readUnsignedShortLE()));
+            position.setCourse(buf.readUnsignedByte() * 2);
+            position.setAltitude(buf.readShortLE());
+
+            buf.readUnsignedShortLE(); // position accuracy
+            buf.readUnsignedByte(); // speed accuracy
+
+            position.set(Position.KEY_EVENT, buf.readUnsignedByte());
+
+            position.setValid(BitUtil.check(buf.readByte(), 0));
+
+            position.set(Position.KEY_INPUT, buf.readUnsignedIntLE());
+            position.set(Position.KEY_OUTPUT, buf.readUnsignedShortLE());
+
+            for (int i = 1; i <= 5; i++) {
+                position.set(Position.PREFIX_ADC + i, buf.readShortLE());
+            }
+
+            position.set(Position.KEY_DEVICE_TEMP, buf.readByte());
+
+            buf.readShortLE(); // accelerometer x
+            buf.readShortLE(); // accelerometer y
+            buf.readShortLE(); // accelerometer z
+
+            buf.skipBytes(8); // device id
+
+            position.set(Position.KEY_PDOP, buf.readUnsignedShortLE() * 0.01);
+
+            buf.skipBytes(2); // reserved
+
+            buf.readUnsignedShortLE(); // checksum
+
+            positions.add(position);
+        }
+
+        return positions;
+    }
+
+    private List<Position> decodeStandard(Channel channel, SocketAddress remoteAddress, ByteBuf buf) {
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        List<Position> positions = new LinkedList<>();
+
+        while (buf.isReadable()) {
+            int recordEnd = buf.readerIndex() + buf.readUnsignedShortLE();
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            position.set(Position.KEY_INDEX, buf.readUnsignedIntLE());
+
+            position.setDeviceTime(new Date(1356998400000L + buf.readUnsignedIntLE() * 1000)); // since 1 Jan 2013
+
+            position.set(Position.KEY_EVENT, buf.readUnsignedByte());
+
+            while (buf.readerIndex() < recordEnd) {
+
+                int fieldId = buf.readUnsignedByte();
+                int fieldLength = buf.readUnsignedByte();
+                int fieldEnd = buf.readerIndex() + (fieldLength == 255 ? buf.readUnsignedShortLE() : fieldLength);
+
+                if (fieldId == 0) {
+
+                    position.setFixTime(new Date(1356998400000L + buf.readUnsignedIntLE() * 1000));
+                    position.setLatitude(buf.readIntLE() * 0.0000001);
+                    position.setLongitude(buf.readIntLE() * 0.0000001);
+                    position.setAltitude(buf.readShortLE());
+                    position.setSpeed(UnitsConverter.knotsFromCps(buf.readUnsignedShortLE()));
+
+                    buf.readUnsignedByte(); // speed accuracy
+
+                    position.setCourse(buf.readUnsignedByte() * 2);
+
+                    position.set(Position.KEY_PDOP, buf.readUnsignedByte() * 0.1);
+
+                    position.setAccuracy(buf.readUnsignedByte());
+                    position.setValid(buf.readUnsignedByte() != 0);
+
+                } else if (fieldId == 2) {
+
+                    int input = buf.readIntLE();
+                    int output = buf.readUnsignedShortLE();
+                    int status = buf.readUnsignedShortLE();
+
+                    position.set(Position.KEY_IGNITION, BitUtil.check(input, 0));
+
+                    position.set(Position.KEY_INPUT, input);
+                    position.set(Position.KEY_OUTPUT, output);
+                    position.set(Position.KEY_STATUS, status);
+
+                } else if (fieldId == 6) {
+
+                    while (buf.readerIndex() < fieldEnd) {
+                        switch (buf.readUnsignedByte()) {
+                            case 1:
+                                position.set(Position.KEY_BATTERY, buf.readUnsignedShortLE() * 0.001);
+                                break;
+                            case 2:
+                                position.set(Position.KEY_POWER, buf.readUnsignedShortLE() * 0.01);
+                                break;
+                            case 3:
+                                position.set(Position.KEY_DEVICE_TEMP, buf.readShortLE() * 0.01);
+                                break;
+                            case 4:
+                                position.set(Position.KEY_RSSI, buf.readUnsignedShortLE());
+                                break;
+                            case 5:
+                                position.set("solarPower", buf.readUnsignedShortLE() * 0.001);
+                                break;
+                            default:
+                                break;
+                        }
+                    }
+
+                }
+
+                buf.readerIndex(fieldEnd);
+
+            }
+
+            if (position.getFixTime() == null) {
+                getLastLocation(position, position.getDeviceTime());
+            }
+
+            positions.add(position);
+        }
+
+        return positions;
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        buf.skipBytes(2); // header
+
+        int type = buf.readUnsignedByte();
+        int length = buf.readUnsignedShortLE();
+
+        if (type == MSG_HELLO) {
+
+            buf.readUnsignedIntLE(); // device serial number
+
+            DeviceSession deviceSession = getDeviceSession(
+                    channel, remoteAddress, buf.readSlice(15).toString(StandardCharsets.US_ASCII));
+
+            ByteBuf response = Unpooled.buffer();
+            if (length == 51) {
+                response.writeByte(0); // reserved
+                response.writeIntLE(0); // reserved
+            } else {
+                response.writeIntLE((int) ((System.currentTimeMillis() - 1356998400000L) / 1000));
+                response.writeIntLE(deviceSession != null ? 0 : 1); // flags
+            }
+
+            sendResponse(channel, MSG_HELLO_RESPONSE, response);
+
+        } else if (type == MSG_COMMIT) {
+
+            ByteBuf response = Unpooled.buffer(0);
+            response.writeByte(1); // flags (success)
+            sendResponse(channel, MSG_COMMIT_RESPONSE, response);
+
+        } else if (type == MSG_CANNED_REQUEST_1) {
+
+            ByteBuf response = Unpooled.buffer(0);
+            response.writeBytes(new byte[12]);
+            sendResponse(channel, MSG_CANNED_RESPONSE_1, response);
+
+        } else if (type == MSG_CANNED_REQUEST_2) {
+
+            sendResponse(channel, MSG_CANNED_RESPONSE_2, null);
+
+        } else if (type == MSG_DATA_RECORD_64) {
+
+            return decodeFixed64(channel, remoteAddress, buf);
+
+        } else if (type == MSG_DATA_RECORD) {
+
+            return decodeStandard(channel, remoteAddress, buf);
+
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/DwayProtocol.java b/src/main/java/org/traccar/protocol/DwayProtocol.java
new file mode 100644
index 000000000..05fd8b6e7
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/DwayProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LineBasedFrameDecoder;
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class DwayProtocol extends BaseProtocol {
+
+    public DwayProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LineBasedFrameDecoder(1024));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new DwayProtocolDecoder(DwayProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/DwayProtocolDecoder.java b/src/main/java/org/traccar/protocol/DwayProtocolDecoder.java
new file mode 100644
index 000000000..9b02c898e
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/DwayProtocolDecoder.java
@@ -0,0 +1,103 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class DwayProtocolDecoder extends BaseProtocolDecoder {
+
+    public DwayProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("AA55,")
+            .number("d+,")                       // index
+            .number("(d+),")                     // imei
+            .number("d+,")                       // type
+            .number("(dd)(dd)(dd),")             // date (yymmdd)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .number("(-?d+.d+),")                // latitude
+            .number("(-?d+.d+),")                // longitude
+            .number("(-?d+),")                   // altitude
+            .number(" ?(d+.d+),")                // speed
+            .number("(d+),")                     // course
+            .number("([01]{4}),")                // input
+            .number("([01]{4}),")                // output
+            .number("([01]+),")                  // flags
+            .number("(d+),")                     // battery
+            .number("(d+),")                     // adc1
+            .number("(d+),")                     // adc2
+            .number("(d+)")                      // driver
+            .any()
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        String sentence = (String) msg;
+        if (sentence.equals("AA55,HB")) {
+            if (channel != null) {
+                channel.writeAndFlush(new NetworkMessage("55AA,HB,OK\r\n", remoteAddress));
+            }
+            return null;
+        }
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setValid(true);
+        position.setTime(parser.nextDateTime());
+        position.setLatitude(parser.nextDouble());
+        position.setLongitude(parser.nextDouble());
+        position.setAltitude(parser.nextDouble(0));
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
+        position.setCourse(parser.nextDouble(0));
+
+        position.set(Position.KEY_INPUT, parser.nextBinInt());
+        position.set(Position.KEY_OUTPUT, parser.nextBinInt());
+
+        position.set(Position.KEY_BATTERY, parser.nextInt() * 0.001);
+        position.set(Position.PREFIX_ADC + 1, parser.nextInt() * 0.001);
+        position.set(Position.PREFIX_ADC + 2, parser.nextInt() * 0.001);
+        position.set(Position.KEY_DRIVER_UNIQUE_ID, parser.next());
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/EasyTrackProtocol.java b/src/main/java/org/traccar/protocol/EasyTrackProtocol.java
new file mode 100644
index 000000000..74c636d06
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/EasyTrackProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.CharacterDelimiterFrameDecoder;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class EasyTrackProtocol extends BaseProtocol {
+
+    public EasyTrackProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, "#", "\r\n"));
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new EasyTrackProtocolDecoder(EasyTrackProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/EasyTrackProtocolDecoder.java b/src/main/java/org/traccar/protocol/EasyTrackProtocolDecoder.java
new file mode 100644
index 000000000..2ddb24f5c
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/EasyTrackProtocolDecoder.java
@@ -0,0 +1,138 @@
+/*
+ * Copyright 2013 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class EasyTrackProtocolDecoder extends BaseProtocolDecoder {
+
+    public EasyTrackProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("*").expression("..,")         // manufacturer
+            .number("(d+),")                     // imei
+            .expression("([^,]{2}),")            // command
+            .expression("([AV]),")               // validity
+            .number("(xx)(xx)(xx),")             // date (yymmdd)
+            .number("(xx)(xx)(xx),")             // time (hhmmss)
+            .number("(x)(x{7}),")                // latitude
+            .number("(x)(x{7}),")                // longitude
+            .number("(x{4}),")                   // speed
+            .number("(x{4}),")                   // course
+            .number("(x{8}),")                   // status
+            .number("(x+),")                     // signal
+            .number("(d+),")                     // power
+            .number("(x{4}),")                   // oil
+            .number("(x+),?")                    // odometer
+            .number("(d+)?")                     // altitude
+            .any()
+            .compile();
+
+    private String decodeAlarm(long status) {
+        if ((status & 0x02000000) != 0) {
+            return Position.ALARM_GEOFENCE_ENTER;
+        }
+        if ((status & 0x04000000) != 0) {
+            return Position.ALARM_GEOFENCE_EXIT;
+        }
+        if ((status & 0x08000000) != 0) {
+            return Position.ALARM_LOW_BATTERY;
+        }
+        if ((status & 0x20000000) != 0) {
+            return Position.ALARM_VIBRATION;
+        }
+        if ((status & 0x80000000) != 0) {
+            return Position.ALARM_OVERSPEED;
+        }
+        if ((status & 0x00010000) != 0) {
+            return Position.ALARM_SOS;
+        }
+        if ((status & 0x00040000) != 0) {
+            return Position.ALARM_POWER_CUT;
+        }
+        return null;
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.set(Position.KEY_COMMAND, parser.next());
+
+        position.setValid(parser.next().equals("A"));
+
+        DateBuilder dateBuilder = new DateBuilder()
+                .setDate(parser.nextHexInt(0), parser.nextHexInt(0), parser.nextHexInt(0))
+                .setTime(parser.nextHexInt(0), parser.nextHexInt(0), parser.nextHexInt(0));
+        position.setTime(dateBuilder.getDate());
+
+        if (BitUtil.check(parser.nextHexInt(0), 3)) {
+            position.setLatitude(-parser.nextHexInt(0) / 600000.0);
+        } else {
+            position.setLatitude(parser.nextHexInt(0) / 600000.0);
+        }
+
+        if (BitUtil.check(parser.nextHexInt(0), 3)) {
+            position.setLongitude(-parser.nextHexInt(0) / 600000.0);
+        } else {
+            position.setLongitude(parser.nextHexInt(0) / 600000.0);
+        }
+
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextHexInt(0) / 100.0));
+        position.setCourse(parser.nextHexInt(0) / 100.0);
+
+        long status = parser.nextHexLong();
+        position.set(Position.KEY_STATUS, status);
+        position.set(Position.KEY_ALARM, decodeAlarm(status));
+
+        position.set("signal", parser.next());
+        position.set(Position.KEY_POWER, parser.nextDouble(0));
+        position.set("oil", parser.nextHexInt(0));
+        position.set(Position.KEY_ODOMETER, parser.nextHexInt(0) * 100);
+
+        position.setAltitude(parser.nextDouble(0));
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/EelinkProtocol.java b/src/main/java/org/traccar/protocol/EelinkProtocol.java
new file mode 100644
index 000000000..de4ea971b
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/EelinkProtocol.java
@@ -0,0 +1,50 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LengthFieldBasedFrameDecoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+import org.traccar.model.Command;
+
+public class EelinkProtocol extends BaseProtocol {
+
+    public EelinkProtocol() {
+        setSupportedDataCommands(
+                Command.TYPE_CUSTOM,
+                Command.TYPE_POSITION_SINGLE,
+                Command.TYPE_ENGINE_STOP,
+                Command.TYPE_ENGINE_RESUME,
+                Command.TYPE_REBOOT_DEVICE);
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LengthFieldBasedFrameDecoder(1024, 3, 2));
+                pipeline.addLast(new EelinkProtocolEncoder(false));
+                pipeline.addLast(new EelinkProtocolDecoder(EelinkProtocol.this));
+            }
+        });
+        addServer(new TrackerServer(true, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new EelinkProtocolEncoder(true));
+                pipeline.addLast(new EelinkProtocolDecoder(EelinkProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/EelinkProtocolDecoder.java b/src/main/java/org/traccar/protocol/EelinkProtocolDecoder.java
new file mode 100644
index 000000000..2a1db2e32
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/EelinkProtocolDecoder.java
@@ -0,0 +1,441 @@
+/*
+ * Copyright 2014 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.ByteBufUtil;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import io.netty.channel.socket.DatagramChannel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.CellTower;
+import org.traccar.model.Network;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.Date;
+import java.util.regex.Pattern;
+
+public class EelinkProtocolDecoder extends BaseProtocolDecoder {
+
+    public EelinkProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    public static final int MSG_LOGIN = 0x01;
+    public static final int MSG_GPS = 0x02;
+    public static final int MSG_HEARTBEAT = 0x03;
+    public static final int MSG_ALARM = 0x04;
+    public static final int MSG_STATE = 0x05;
+    public static final int MSG_SMS = 0x06;
+    public static final int MSG_OBD = 0x07;
+    public static final int MSG_DOWNLINK = 0x80;
+    public static final int MSG_DATA = 0x81;
+
+    public static final int MSG_NORMAL = 0x12;
+    public static final int MSG_WARNING = 0x14;
+    public static final int MSG_REPORT = 0x15;
+    public static final int MSG_COMMAND = 0x16;
+    public static final int MSG_OBD_DATA = 0x17;
+    public static final int MSG_OBD_BODY = 0x18;
+    public static final int MSG_OBD_CODE = 0x19;
+    public static final int MSG_CAMERA_INFO = 0x1E;
+    public static final int MSG_CAMERA_DATA = 0x1F;
+
+    private String decodeAlarm(Short value) {
+        switch (value) {
+            case 0x01:
+                return Position.ALARM_POWER_OFF;
+            case 0x02:
+                return Position.ALARM_SOS;
+            case 0x03:
+                return Position.ALARM_LOW_BATTERY;
+            case 0x04:
+                return Position.ALARM_VIBRATION;
+            case 0x08:
+            case 0x09:
+                return Position.ALARM_GPS_ANTENNA_CUT;
+            case 0x81:
+                return Position.ALARM_LOW_SPEED;
+            case 0x82:
+                return Position.ALARM_OVERSPEED;
+            case 0x83:
+                return Position.ALARM_GEOFENCE_ENTER;
+            case 0x84:
+                return Position.ALARM_GEOFENCE_EXIT;
+            case 0x85:
+                return Position.ALARM_ACCIDENT;
+            case 0x86:
+                return Position.ALARM_FALL_DOWN;
+            default:
+                return null;
+        }
+    }
+
+    private void decodeStatus(Position position, int status) {
+        if (BitUtil.check(status, 1)) {
+            position.set(Position.KEY_IGNITION, BitUtil.check(status, 2));
+        }
+        if (BitUtil.check(status, 3)) {
+            position.set(Position.KEY_ARMED, BitUtil.check(status, 4));
+        }
+        if (BitUtil.check(status, 5)) {
+            position.set(Position.KEY_BLOCKED, !BitUtil.check(status, 6));
+        }
+        if (BitUtil.check(status, 7)) {
+            position.set(Position.KEY_CHARGE, BitUtil.check(status, 8));
+        }
+        position.set(Position.KEY_STATUS, status);
+    }
+
+    private Position decodeOld(DeviceSession deviceSession, ByteBuf buf, int type, int index) {
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.set(Position.KEY_INDEX, index);
+
+        position.setTime(new Date(buf.readUnsignedInt() * 1000));
+        position.setLatitude(buf.readInt() / 1800000.0);
+        position.setLongitude(buf.readInt() / 1800000.0);
+        position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte()));
+        position.setCourse(buf.readUnsignedShort());
+
+        position.setNetwork(new Network(CellTower.from(
+                buf.readUnsignedShort(), buf.readUnsignedShort(), buf.readUnsignedShort(), buf.readUnsignedMedium())));
+
+        position.setValid((buf.readUnsignedByte() & 0x01) != 0);
+
+        if (type == MSG_GPS) {
+
+            if (buf.readableBytes() >= 2) {
+                decodeStatus(position, buf.readUnsignedShort());
+            }
+
+            if (buf.readableBytes() >= 2 * 4) {
+
+                position.set(Position.KEY_BATTERY, buf.readUnsignedShort() * 0.001);
+
+                position.set(Position.KEY_RSSI, buf.readUnsignedShort());
+
+                position.set(Position.PREFIX_ADC + 1, buf.readUnsignedShort());
+                position.set(Position.PREFIX_ADC + 2, buf.readUnsignedShort());
+
+            }
+
+        } else if (type == MSG_ALARM) {
+
+            position.set(Position.KEY_ALARM, decodeAlarm(buf.readUnsignedByte()));
+
+        } else if (type == MSG_STATE) {
+
+            int statusType = buf.readUnsignedByte();
+
+            position.set(Position.KEY_EVENT, statusType);
+
+            if (statusType == 0x01 || statusType == 0x02 || statusType == 0x03) {
+                buf.readUnsignedInt(); // device time
+                if (buf.readableBytes() >= 2) {
+                    decodeStatus(position, buf.readUnsignedShort());
+                }
+            }
+
+        }
+
+        return position;
+    }
+
+    private Position decodeNew(DeviceSession deviceSession, ByteBuf buf, int type, int index) {
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.set(Position.KEY_INDEX, index);
+
+        position.setTime(new Date(buf.readUnsignedInt() * 1000));
+
+        int flags = buf.readUnsignedByte();
+
+        if (BitUtil.check(flags, 0)) {
+            position.setLatitude(buf.readInt() / 1800000.0);
+            position.setLongitude(buf.readInt() / 1800000.0);
+            position.setAltitude(buf.readShort());
+            position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShort()));
+            position.setCourse(buf.readUnsignedShort());
+            position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
+        } else {
+            getLastLocation(position, position.getDeviceTime());
+        }
+
+        if (BitUtil.check(flags, 1)) {
+            position.setNetwork(new Network(CellTower.from(
+                    buf.readUnsignedShort(), buf.readUnsignedShort(),
+                    buf.readUnsignedShort(), buf.readUnsignedInt(), buf.readUnsignedByte())));
+        }
+
+        if (BitUtil.check(flags, 2)) {
+            buf.skipBytes(7); // bsid1
+        }
+
+        if (BitUtil.check(flags, 3)) {
+            buf.skipBytes(7); // bsid2
+        }
+
+        if (BitUtil.check(flags, 4)) {
+            buf.skipBytes(7); // bss0
+        }
+
+        if (BitUtil.check(flags, 5)) {
+            buf.skipBytes(7); // bss1
+        }
+
+        if (BitUtil.check(flags, 6)) {
+            buf.skipBytes(7); // bss2
+        }
+
+        if (type == MSG_WARNING) {
+
+            position.set(Position.KEY_ALARM, decodeAlarm(buf.readUnsignedByte()));
+
+        } else if (type == MSG_REPORT) {
+
+            buf.readUnsignedByte(); // report type
+
+        }
+
+        if (type == MSG_NORMAL || type == MSG_WARNING || type == MSG_REPORT) {
+
+            int status = buf.readUnsignedShort();
+            position.setValid(BitUtil.check(status, 0));
+            if (BitUtil.check(status, 1)) {
+                position.set(Position.KEY_IGNITION, BitUtil.check(status, 2));
+            }
+            position.set(Position.KEY_STATUS, status);
+
+        }
+
+        if (type == MSG_NORMAL) {
+
+            if (buf.readableBytes() >= 2) {
+                position.set(Position.KEY_BATTERY, buf.readUnsignedShort() * 0.001);
+            }
+
+            if (buf.readableBytes() >= 4) {
+                position.set(Position.PREFIX_ADC + 0, buf.readUnsignedShort());
+                position.set(Position.PREFIX_ADC + 1, buf.readUnsignedShort());
+            }
+
+            if (buf.readableBytes() >= 4) {
+                position.set(Position.KEY_ODOMETER, buf.readUnsignedInt());
+            }
+
+            if (buf.readableBytes() >= 4) {
+                buf.readUnsignedShort(); // gsm counter
+                buf.readUnsignedShort(); // gps counter
+            }
+
+            if (buf.readableBytes() >= 4) {
+                position.set(Position.KEY_STEPS, buf.readUnsignedShort());
+                buf.readUnsignedShort(); // walking time
+            }
+
+            if (buf.readableBytes() >= 12) {
+                position.set(Position.PREFIX_TEMP + 1, buf.readUnsignedShort() / 256.0);
+                position.set("humidity", buf.readUnsignedShort() * 0.1);
+                position.set("illuminance", buf.readUnsignedInt() / 256.0);
+                position.set("co2", buf.readUnsignedInt());
+            }
+
+            if (buf.readableBytes() >= 2) {
+                position.set(Position.PREFIX_TEMP + 2, buf.readShort() / 16.0);
+            }
+
+        }
+
+        return position;
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("Lat:")
+            .number("([NS])(d+.d+)")             // latitude
+            .any()
+            .text("Lon:")
+            .number("([EW])(d+.d+)")             // longitude
+            .any()
+            .text("Course:")
+            .number("(d+.d+)")                   // course
+            .any()
+            .text("Speed:")
+            .number("(d+.d+)")                   // speed
+            .any()
+            .expression("Date ?Time:")
+            .number("(dddd)-(dd)-(dd) ")         // date
+            .number("(dd):(dd):(dd)")            // time
+            .compile();
+
+    private Position decodeResult(DeviceSession deviceSession, ByteBuf buf, int index) {
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.set(Position.KEY_INDEX, index);
+
+        buf.readUnsignedByte(); // type
+        buf.readUnsignedInt(); // uid
+
+        String sentence = buf.toString(StandardCharsets.UTF_8);
+
+        Parser parser = new Parser(PATTERN, sentence);
+        if (parser.matches()) {
+
+            position.setValid(true);
+            position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG));
+            position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG));
+            position.setCourse(parser.nextDouble());
+            position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble()));
+            position.setTime(parser.nextDateTime());
+
+        } else {
+
+            getLastLocation(position, null);
+
+            position.set(Position.KEY_RESULT, sentence);
+
+        }
+
+        return position;
+    }
+
+    private Position decodeObd(DeviceSession deviceSession, ByteBuf buf, int index) {
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        getLastLocation(position, new Date(buf.readUnsignedInt() * 1000));
+
+        while (buf.readableBytes() > 0) {
+            int pid = buf.readUnsignedByte();
+            int value = buf.readInt();
+            switch (pid) {
+                case 0x89:
+                    position.set(Position.KEY_FUEL_CONSUMPTION, value);
+                    break;
+                case 0x8a:
+                    position.set(Position.KEY_ODOMETER, value * 1000L);
+                    break;
+                case 0x8b:
+                    position.set(Position.KEY_FUEL_LEVEL, value / 10);
+                    break;
+                default:
+                    break;
+            }
+        }
+
+        return position;
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        String uniqueId = null;
+        DeviceSession deviceSession;
+
+        if (buf.getByte(0) == 'E' && buf.getByte(1) == 'L') {
+            buf.skipBytes(2 + 2 + 2); // udp header
+            uniqueId = ByteBufUtil.hexDump(buf.readSlice(8)).substring(1);
+            deviceSession = getDeviceSession(channel, remoteAddress, uniqueId);
+        } else {
+            deviceSession = getDeviceSession(channel, remoteAddress);
+        }
+
+        buf.skipBytes(2); // header
+        int type = buf.readUnsignedByte();
+        buf.readShort(); // length
+        int index = buf.readUnsignedShort();
+
+        if (type != MSG_GPS && type != MSG_DATA) {
+            ByteBuf content = Unpooled.buffer();
+            if (type == MSG_LOGIN) {
+                content.writeInt((int) (System.currentTimeMillis() / 1000));
+                content.writeByte(1); // protocol version
+                content.writeByte(0); // action mask
+            }
+            ByteBuf response = EelinkProtocolEncoder.encodeContent(
+                    channel instanceof DatagramChannel, uniqueId, type, index, content);
+            content.release();
+            if (channel != null) {
+                channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
+            }
+        }
+
+        if (type == MSG_LOGIN) {
+
+            if (deviceSession == null) {
+                getDeviceSession(channel, remoteAddress, ByteBufUtil.hexDump(buf.readSlice(8)).substring(1));
+            }
+
+        } else {
+
+            if (deviceSession == null) {
+                return null;
+            }
+
+            if (type == MSG_GPS || type == MSG_ALARM || type == MSG_STATE || type == MSG_SMS) {
+
+                return decodeOld(deviceSession, buf, type, index);
+
+            } else if (type >= MSG_NORMAL && type <= MSG_OBD_CODE) {
+
+                return decodeNew(deviceSession, buf, type, index);
+
+            } else if (type == MSG_HEARTBEAT && buf.readableBytes() >= 2) {
+
+                Position position = new Position(getProtocolName());
+                position.setDeviceId(deviceSession.getDeviceId());
+
+                getLastLocation(position, null);
+
+                decodeStatus(position, buf.readUnsignedShort());
+
+                return position;
+
+            } else if (type == MSG_OBD) {
+
+                return decodeObd(deviceSession, buf, index);
+
+            } else if (type == MSG_DOWNLINK) {
+
+                return decodeResult(deviceSession, buf, index);
+
+            }
+
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/EelinkProtocolEncoder.java b/src/main/java/org/traccar/protocol/EelinkProtocolEncoder.java
new file mode 100644
index 000000000..8f33441fb
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/EelinkProtocolEncoder.java
@@ -0,0 +1,107 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import org.traccar.BaseProtocolEncoder;
+import org.traccar.helper.DataConverter;
+import org.traccar.model.Command;
+
+import java.nio.ByteBuffer;
+import java.nio.charset.StandardCharsets;
+
+public class EelinkProtocolEncoder extends BaseProtocolEncoder {
+
+    private boolean connectionless;
+
+    public EelinkProtocolEncoder(boolean connectionless) {
+        this.connectionless = connectionless;
+    }
+
+    public static int checksum(ByteBuffer buf) {
+        int sum = 0;
+        while (buf.hasRemaining()) {
+            sum = (((sum << 1) | (sum >> 15)) + (buf.get() & 0xFF)) & 0xFFFF;
+        }
+        return sum;
+    }
+
+    public static ByteBuf encodeContent(
+            boolean connectionless, String uniqueId, int type, int index, ByteBuf content) {
+
+        ByteBuf buf = Unpooled.buffer();
+
+        if (connectionless) {
+            buf.writeBytes(DataConverter.parseHex('0' + uniqueId));
+        }
+
+        buf.writeByte(0x67);
+        buf.writeByte(0x67);
+        buf.writeByte(type);
+        buf.writeShort(2 + (content != null ? content.readableBytes() : 0)); // length
+        buf.writeShort(index);
+
+        if (content != null) {
+            buf.writeBytes(content);
+        }
+
+        ByteBuf result = Unpooled.buffer();
+
+        if (connectionless) {
+            result.writeByte('E');
+            result.writeByte('L');
+            result.writeShort(2 + buf.readableBytes()); // length
+            result.writeShort(checksum(buf.nioBuffer()));
+        }
+
+        result.writeBytes(buf);
+        buf.release();
+
+        return result;
+    }
+
+    private ByteBuf encodeContent(long deviceId, String content) {
+
+        ByteBuf buf = Unpooled.buffer();
+
+        buf.writeByte(0x01); // command
+        buf.writeInt(0); // server id
+        buf.writeBytes(content.getBytes(StandardCharsets.UTF_8));
+
+        return encodeContent(connectionless, getUniqueId(deviceId), EelinkProtocolDecoder.MSG_DOWNLINK, 0, buf);
+    }
+
+    @Override
+    protected Object encodeCommand(Command command) {
+
+        switch (command.getType()) {
+            case Command.TYPE_CUSTOM:
+                return encodeContent(command.getDeviceId(), command.getString(Command.KEY_DATA));
+            case Command.TYPE_POSITION_SINGLE:
+                return encodeContent(command.getDeviceId(), "WHERE#");
+            case Command.TYPE_ENGINE_STOP:
+                return encodeContent(command.getDeviceId(), "RELAY,1#");
+            case Command.TYPE_ENGINE_RESUME:
+                return encodeContent(command.getDeviceId(), "RELAY,0#");
+            case Command.TYPE_REBOOT_DEVICE:
+                return encodeContent(command.getDeviceId(), "RESET#");
+            default:
+                return null;
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/EgtsFrameDecoder.java b/src/main/java/org/traccar/protocol/EgtsFrameDecoder.java
new file mode 100644
index 000000000..84f1f11a7
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/EgtsFrameDecoder.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+import org.traccar.BaseFrameDecoder;
+
+public class EgtsFrameDecoder extends BaseFrameDecoder {
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+        if (buf.readableBytes() < 10) {
+            return null;
+        }
+
+        int headerLength = buf.getUnsignedByte(buf.readerIndex() + 3);
+        int frameLength = buf.getUnsignedShortLE(buf.readerIndex() + 5);
+
+        int length = headerLength + frameLength + (frameLength > 0 ? 2 : 0);
+
+        if (buf.readableBytes() >= length) {
+            return buf.readRetainedSlice(length);
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/EgtsProtocol.java b/src/main/java/org/traccar/protocol/EgtsProtocol.java
new file mode 100644
index 000000000..5d4638f37
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/EgtsProtocol.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class EgtsProtocol extends BaseProtocol {
+
+    public EgtsProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new EgtsFrameDecoder());
+                pipeline.addLast(new EgtsProtocolDecoder(EgtsProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/EgtsProtocolDecoder.java b/src/main/java/org/traccar/protocol/EgtsProtocolDecoder.java
new file mode 100644
index 000000000..b9fcb2f44
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/EgtsProtocolDecoder.java
@@ -0,0 +1,265 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.Checksum;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.Date;
+import java.util.LinkedList;
+import java.util.List;
+
+public class EgtsProtocolDecoder extends BaseProtocolDecoder {
+
+    public EgtsProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    public static final int PT_RESPONSE = 0;
+    public static final int PT_APPDATA = 1;
+    public static final int PT_SIGNED_APPDATA = 2;
+
+    public static final int SERVICE_AUTH = 1;
+    public static final int SERVICE_TELEDATA = 2;
+    public static final int SERVICE_COMMANDS = 4;
+    public static final int SERVICE_FIRMWARE = 9;
+    public static final int SERVICE_ECALL = 10;
+
+    public static final int MSG_RECORD_RESPONSE = 0;
+    public static final int MSG_TERM_IDENTITY = 1;
+    public static final int MSG_MODULE_DATA = 2;
+    public static final int MSG_VEHICLE_DATA = 3;
+    public static final int MSG_AUTH_PARAMS = 4;
+    public static final int MSG_AUTH_INFO = 5;
+    public static final int MSG_SERVICE_INFO = 6;
+    public static final int MSG_RESULT_CODE = 7;
+    public static final int MSG_POS_DATA = 16;
+    public static final int MSG_EXT_POS_DATA = 17;
+    public static final int MSG_AD_SENSORS_DATA = 18;
+    public static final int MSG_COUNTERS_DATA = 19;
+    public static final int MSG_STATE_DATA = 20;
+    public static final int MSG_LOOPIN_DATA = 22;
+    public static final int MSG_ABS_DIG_SENS_DATA = 23;
+    public static final int MSG_ABS_AN_SENS_DATA = 24;
+    public static final int MSG_ABS_CNTR_DATA = 25;
+    public static final int MSG_ABS_LOOPIN_DATA = 26;
+    public static final int MSG_LIQUID_LEVEL_SENSOR = 27;
+    public static final int MSG_PASSENGERS_COUNTERS  = 28;
+
+    private int packetId;
+
+    private void sendResponse(
+            Channel channel, int packetType, int index, int serviceType, int type, ByteBuf content) {
+        if (channel != null) {
+
+            ByteBuf data = Unpooled.buffer();
+            data.writeByte(type);
+            data.writeShortLE(content.readableBytes());
+            data.writeBytes(content);
+            content.release();
+
+            ByteBuf record = Unpooled.buffer();
+            if (packetType == PT_RESPONSE) {
+                record.writeShortLE(index);
+                record.writeByte(0); // success
+            }
+            record.writeShortLE(data.readableBytes());
+            record.writeShortLE(0);
+            record.writeByte(0); // flags (possibly 1 << 6)
+            record.writeByte(serviceType);
+            record.writeByte(serviceType);
+            record.writeBytes(data);
+            data.release();
+            int recordChecksum = Checksum.crc16(Checksum.CRC16_CCITT_FALSE, record.nioBuffer());
+
+            ByteBuf response = Unpooled.buffer();
+            response.writeByte(1); // protocol version
+            response.writeByte(0); // security key id
+            response.writeByte(0); // flags
+            response.writeByte(5 + 2 + 2 + 2); // header length
+            response.writeByte(0); // encoding
+            response.writeShortLE(record.readableBytes());
+            response.writeShortLE(packetId++);
+            response.writeByte(packetType);
+            response.writeByte(Checksum.crc8(Checksum.CRC8_EGTS, response.nioBuffer()));
+            response.writeBytes(record);
+            record.release();
+            response.writeShortLE(recordChecksum);
+
+            channel.writeAndFlush(new NetworkMessage(response, channel.remoteAddress()));
+
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        int index = buf.getUnsignedShort(buf.readerIndex() + 5 + 2);
+        buf.skipBytes(buf.getUnsignedByte(buf.readerIndex() + 3));
+
+        List<Position> positions = new LinkedList<>();
+
+        while (buf.readableBytes() > 2) {
+
+            int length = buf.readUnsignedShortLE();
+            int recordIndex = buf.readUnsignedShortLE();
+            int recordFlags = buf.readUnsignedByte();
+
+            if (BitUtil.check(recordFlags, 0)) {
+                buf.readUnsignedIntLE(); // object id
+            }
+
+            if (BitUtil.check(recordFlags, 1)) {
+                buf.readUnsignedIntLE(); // event id
+            }
+            if (BitUtil.check(recordFlags, 2)) {
+                buf.readUnsignedIntLE(); // time
+            }
+
+            int serviceType = buf.readUnsignedByte();
+            buf.readUnsignedByte(); // recipient service type
+
+            int recordEnd = buf.readerIndex() + length;
+
+            Position position = new Position(getProtocolName());
+            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+            if (deviceSession != null) {
+                position.setDeviceId(deviceSession.getDeviceId());
+            }
+
+            ByteBuf response = Unpooled.buffer();
+            response.writeShortLE(recordIndex);
+            response.writeByte(0); // success
+            sendResponse(channel, PT_RESPONSE, index, serviceType, MSG_RECORD_RESPONSE, response);
+
+            while (buf.readerIndex() < recordEnd) {
+                int type = buf.readUnsignedByte();
+                int end = buf.readUnsignedShortLE() + buf.readerIndex();
+
+                if (type == MSG_TERM_IDENTITY) {
+
+                    buf.readUnsignedIntLE(); // object id
+                    int flags = buf.readUnsignedByte();
+
+                    if (BitUtil.check(flags, 0)) {
+                        buf.readUnsignedShortLE(); // home dispatcher identifier
+                    }
+                    if (BitUtil.check(flags, 1)) {
+                        getDeviceSession(
+                                channel, remoteAddress, buf.readSlice(15).toString(StandardCharsets.US_ASCII).trim());
+                    }
+                    if (BitUtil.check(flags, 2)) {
+                        getDeviceSession(
+                                channel, remoteAddress, buf.readSlice(16).toString(StandardCharsets.US_ASCII).trim());
+                    }
+                    if (BitUtil.check(flags, 3)) {
+                        buf.skipBytes(3); // language identifier
+                    }
+                    if (BitUtil.check(flags, 5)) {
+                        buf.skipBytes(3); // network identifier
+                    }
+                    if (BitUtil.check(flags, 6)) {
+                        buf.readUnsignedShortLE(); // buffer size
+                    }
+                    if (BitUtil.check(flags, 7)) {
+                        getDeviceSession(
+                                channel, remoteAddress, buf.readSlice(15).toString(StandardCharsets.US_ASCII).trim());
+                    }
+
+                    response = Unpooled.buffer();
+                    response.writeByte(0); // success
+                    sendResponse(channel, PT_APPDATA, 0, serviceType, MSG_RESULT_CODE, response);
+
+                } else if (type == MSG_POS_DATA) {
+
+                    position.setTime(new Date((buf.readUnsignedIntLE() + 1262304000) * 1000)); // since 2010-01-01
+                    position.setLatitude(buf.readUnsignedIntLE() * 90.0 / 0xFFFFFFFFL);
+                    position.setLongitude(buf.readUnsignedIntLE() * 180.0 / 0xFFFFFFFFL);
+
+                    int flags = buf.readUnsignedByte();
+                    position.setValid(BitUtil.check(flags, 0));
+                    if (BitUtil.check(flags, 5)) {
+                        position.setLatitude(-position.getLatitude());
+                    }
+                    if (BitUtil.check(flags, 6)) {
+                        position.setLongitude(-position.getLongitude());
+                    }
+
+                    int speed = buf.readUnsignedShortLE();
+                    position.setSpeed(UnitsConverter.knotsFromKph(BitUtil.to(speed, 14) * 0.1));
+                    position.setCourse(buf.readUnsignedByte() + (BitUtil.check(speed, 15) ? 0x100 : 0));
+
+                    position.set(Position.KEY_ODOMETER, buf.readUnsignedMediumLE() * 100);
+                    position.set(Position.KEY_INPUT, buf.readUnsignedByte());
+                    position.set(Position.KEY_EVENT, buf.readUnsignedByte());
+
+                    if (BitUtil.check(flags, 7)) {
+                        position.setAltitude(buf.readMediumLE());
+                    }
+
+                } else if (type == MSG_EXT_POS_DATA) {
+
+                    int flags = buf.readUnsignedByte();
+
+                    if (BitUtil.check(flags, 0)) {
+                        position.set(Position.KEY_VDOP, buf.readUnsignedShortLE());
+                    }
+                    if (BitUtil.check(flags, 1)) {
+                        position.set(Position.KEY_HDOP, buf.readUnsignedShortLE());
+                    }
+                    if (BitUtil.check(flags, 2)) {
+                        position.set(Position.KEY_PDOP, buf.readUnsignedShortLE());
+                    }
+                    if (BitUtil.check(flags, 3)) {
+                        position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
+                    }
+
+                } else if (type == MSG_AD_SENSORS_DATA) {
+
+                    buf.readUnsignedByte(); // inputs flags
+
+                    position.set(Position.KEY_OUTPUT, buf.readUnsignedByte());
+
+                    buf.readUnsignedByte(); // adc flags
+
+                }
+
+                buf.readerIndex(end);
+            }
+
+            if (serviceType == SERVICE_TELEDATA && deviceSession != null) {
+                positions.add(position);
+            }
+        }
+
+        return positions.isEmpty() ? null : positions;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/EnforaProtocol.java b/src/main/java/org/traccar/protocol/EnforaProtocol.java
new file mode 100644
index 000000000..f78e4b377
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/EnforaProtocol.java
@@ -0,0 +1,48 @@
+/*
+ * Copyright 2015 - 2019 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LengthFieldBasedFrameDecoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+import org.traccar.model.Command;
+
+public class EnforaProtocol extends BaseProtocol {
+
+    public EnforaProtocol() {
+        setSupportedDataCommands(
+                Command.TYPE_CUSTOM,
+                Command.TYPE_ENGINE_STOP,
+                Command.TYPE_ENGINE_RESUME);
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LengthFieldBasedFrameDecoder(1024, 0, 2, -2, 2));
+                pipeline.addLast(new EnforaProtocolEncoder());
+                pipeline.addLast(new EnforaProtocolDecoder(EnforaProtocol.this));
+            }
+        });
+        addServer(new TrackerServer(true, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new EnforaProtocolEncoder());
+                pipeline.addLast(new EnforaProtocolDecoder(EnforaProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/EnforaProtocolDecoder.java b/src/main/java/org/traccar/protocol/EnforaProtocolDecoder.java
new file mode 100644
index 000000000..bfa7a116b
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/EnforaProtocolDecoder.java
@@ -0,0 +1,115 @@
+/*
+ * Copyright 2012 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.BufferUtil;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.regex.Pattern;
+
+public class EnforaProtocolDecoder extends BaseProtocolDecoder {
+
+    public EnforaProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("GPRMC,")
+            .number("(dd)(dd)(dd).?d*,")         // time (hhmmss)
+            .expression("([AV]),")               // validity
+            .number("(dd)(dd.d+),")              // latitude
+            .expression("([NS]),")
+            .number("(ddd)(dd.d+),")             // longitude
+            .expression("([EW]),")
+            .number("(d+.d+)?,")                 // speed
+            .number("(d+.d+)?,")                 // course
+            .number("(dd)(dd)(dd),")             // date (ddmmyy)
+            .any()
+            .compile();
+
+    public static final int IMEI_LENGTH = 15;
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        // Find IMEI number
+        int index = -1;
+        for (int i = buf.readerIndex(); i < buf.writerIndex() - IMEI_LENGTH; i++) {
+            index = i;
+            for (int j = i; j < i + IMEI_LENGTH; j++) {
+                if (!Character.isDigit((char) buf.getByte(j))) {
+                    index = -1;
+                    break;
+                }
+            }
+            if (index > 0) {
+                break;
+            }
+        }
+        if (index == -1) {
+            return null;
+        }
+
+        String imei = buf.toString(index, IMEI_LENGTH, StandardCharsets.US_ASCII);
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        // Find NMEA sentence
+        int start = BufferUtil.indexOf("GPRMC", buf);
+        if (start == -1) {
+            return null;
+        }
+
+        String sentence = buf.toString(start, buf.readableBytes() - start, StandardCharsets.US_ASCII);
+        Parser parser = new Parser(PATTERN, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        DateBuilder dateBuilder = new DateBuilder()
+                .setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+
+        position.setValid(parser.next().equals("A"));
+        position.setLatitude(parser.nextCoordinate());
+        position.setLongitude(parser.nextCoordinate());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
+
+        dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+        position.setTime(dateBuilder.getDate());
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/EnforaProtocolEncoder.java b/src/main/java/org/traccar/protocol/EnforaProtocolEncoder.java
new file mode 100644
index 000000000..a46e6367d
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/EnforaProtocolEncoder.java
@@ -0,0 +1,55 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ * Copyright 2017 Jose Castellanos
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import org.traccar.StringProtocolEncoder;
+import org.traccar.model.Command;
+
+import java.nio.charset.StandardCharsets;
+
+public class EnforaProtocolEncoder extends StringProtocolEncoder {
+
+    private ByteBuf encodeContent(String content) {
+
+        ByteBuf buf = Unpooled.buffer();
+
+        buf.writeShort(content.length() + 6);
+        buf.writeShort(0); // index
+        buf.writeByte(0x04); // command type
+        buf.writeByte(0); // optional header
+        buf.writeBytes(content.getBytes(StandardCharsets.US_ASCII));
+
+        return buf;
+    }
+
+    @Override
+    protected Object encodeCommand(Command command) {
+        switch (command.getType()) {
+            case Command.TYPE_CUSTOM:
+                return encodeContent(command.getString(Command.KEY_DATA));
+            case Command.TYPE_ENGINE_STOP:
+                return encodeContent("AT$IOGP3=1");
+            case Command.TYPE_ENGINE_RESUME:
+                return encodeContent("AT$IOGP3=0");
+            default:
+                return null;
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/EsealProtocol.java b/src/main/java/org/traccar/protocol/EsealProtocol.java
new file mode 100644
index 000000000..7a27c617d
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/EsealProtocol.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LineBasedFrameDecoder;
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+import org.traccar.model.Command;
+
+public class EsealProtocol extends BaseProtocol {
+
+    public EsealProtocol() {
+        setSupportedDataCommands(
+                Command.TYPE_CUSTOM,
+                Command.TYPE_ALARM_ARM,
+                Command.TYPE_ALARM_DISARM);
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LineBasedFrameDecoder(1024));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new EsealProtocolEncoder());
+                pipeline.addLast(new EsealProtocolDecoder(EsealProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/EsealProtocolDecoder.java b/src/main/java/org/traccar/protocol/EsealProtocolDecoder.java
new file mode 100644
index 000000000..7a1fd7022
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/EsealProtocolDecoder.java
@@ -0,0 +1,158 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.Context;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class EsealProtocolDecoder extends BaseProtocolDecoder {
+
+    private String config;
+
+    public EsealProtocolDecoder(Protocol protocol) {
+        super(protocol);
+        config = Context.getConfig().getString(getProtocolName() + ".config");
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("##S,")
+            .expression("[^,]+,")                // device type
+            .number("(d+),")                     // device id
+            .number("d+,")                       // customer id
+            .expression("[^,]+,")                // firmware version
+            .expression("([^,]+),")              // type
+            .number("(d+),")                     // index
+            .number("(dddd)-(dd)-(dd),")         // date
+            .number("(dd):(dd):(dd),")           // time
+            .number("d+,")                       // interval
+            .expression("([AV]),")               // validity
+            .number("(d+.d+)([NS]) ")            // latitude
+            .number("(d+.d+)([EW]),")            // longitude
+            .number("(d+),")                     // course
+            .number("(d+),")                     // speed
+            .expression("([^,]+),")              // door
+            .number("(d+.d+),")                  // acceleration
+            .expression("([^,]+),")              // nfc
+            .number("(d+.d+),")                  // battery
+            .number("(-?d+),")                   // rssi
+            .text("E##")
+            .compile();
+
+    private void sendResponse(Channel channel, String prefix, String type, String payload) {
+        if (channel != null) {
+            channel.writeAndFlush(new NetworkMessage(
+                    prefix + type + "," + payload + ",E##\r\n", channel.remoteAddress()));
+        }
+    }
+
+    private String decodeAlarm(String type) {
+        switch (type) {
+            case "Event-Door":
+                return Position.ALARM_DOOR;
+            case "Event-Shock":
+                return Position.ALARM_SHOCK;
+            case "Event-Drop":
+                return Position.ALARM_FALL_DOWN;
+            case "Event-Lock":
+                return Position.ALARM_LOCK;
+            case "Event-RC-Unlock":
+                return Position.ALARM_UNLOCK;
+            default:
+                return null;
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        String sentence = (String) msg;
+        Parser parser = new Parser(PATTERN, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        String type = parser.next();
+        String prefix = sentence.substring(0, sentence.indexOf(type));
+        int index = parser.nextInt();
+
+        position.set(Position.KEY_INDEX, index);
+        position.set(Position.KEY_ALARM, decodeAlarm(type));
+
+        switch (type) {
+            case "Startup":
+                sendResponse(channel, prefix, type + " ACK", index + "," + config);
+                break;
+            case "Normal":
+            case "Button-Normal":
+            case "Termination":
+            case "Event-Door":
+            case "Event-Shock":
+            case "Event-Drop":
+            case "Event-Lock":
+            case "Event-RC-Unlock":
+                sendResponse(channel, prefix, type + " ACK", String.valueOf(index));
+                break;
+            default:
+                break;
+        }
+
+        position.setTime(parser.nextDateTime());
+        position.setValid(parser.next().equals("A"));
+        position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM));
+        position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM));
+        position.setCourse(parser.nextInt());
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextInt()));
+
+        switch (parser.next()) {
+            case "Open":
+                position.set(Position.KEY_DOOR, true);
+                break;
+            case "Close":
+                position.set(Position.KEY_DOOR, false);
+                break;
+            default:
+                break;
+        }
+
+        position.set(Position.KEY_ACCELERATION, parser.nextDouble());
+        position.set("nfc", parser.next());
+        position.set(Position.KEY_BATTERY, parser.nextDouble());
+        position.set(Position.KEY_RSSI, parser.nextInt());
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/EsealProtocolEncoder.java b/src/main/java/org/traccar/protocol/EsealProtocolEncoder.java
new file mode 100644
index 000000000..b9bcc5b0a
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/EsealProtocolEncoder.java
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.StringProtocolEncoder;
+import org.traccar.model.Command;
+
+public class EsealProtocolEncoder extends StringProtocolEncoder {
+
+    @Override
+    protected Object encodeCommand(Command command) {
+
+        switch (command.getType()) {
+            case Command.TYPE_CUSTOM:
+                return formatCommand(
+                        command, "##S,eSeal,{%s},256,3.0.8,{%s},E##", Command.KEY_UNIQUE_ID, Command.KEY_DATA);
+            case Command.TYPE_ALARM_ARM:
+                return formatCommand(
+                        command, "##S,eSeal,{%s},256,3.0.8,RC-Power Control,Power OFF,E##", Command.KEY_UNIQUE_ID);
+            case Command.TYPE_ALARM_DISARM:
+                return formatCommand(
+                        command, "##S,eSeal,{%s},256,3.0.8,RC-Unlock,E##", Command.KEY_UNIQUE_ID);
+            default:
+                return null;
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/EskyFrameDecoder.java b/src/main/java/org/traccar/protocol/EskyFrameDecoder.java
new file mode 100644
index 000000000..da24c1273
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/EskyFrameDecoder.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+import org.traccar.BaseFrameDecoder;
+
+public class EskyFrameDecoder extends BaseFrameDecoder {
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+        buf.readerIndex(buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) 'E'));
+
+        int endIndex = buf.indexOf(buf.readerIndex() + 1, buf.writerIndex(), (byte) 'E');
+        if (endIndex > 0) {
+            return buf.readRetainedSlice(endIndex - buf.readerIndex());
+        } else {
+            return buf.readRetainedSlice(buf.readableBytes()); // assume full frame
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/EskyProtocol.java b/src/main/java/org/traccar/protocol/EskyProtocol.java
new file mode 100644
index 000000000..aaa92da58
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/EskyProtocol.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class EskyProtocol extends BaseProtocol {
+
+    public EskyProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new EskyFrameDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new EskyProtocolDecoder(EskyProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/EskyProtocolDecoder.java b/src/main/java/org/traccar/protocol/EskyProtocolDecoder.java
new file mode 100644
index 000000000..641b2e28f
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/EskyProtocolDecoder.java
@@ -0,0 +1,94 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class EskyProtocolDecoder extends BaseProtocolDecoder {
+
+    public EskyProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .expression("..;")                   // header
+            .number("d+;")                       // index
+            .number("(d+);")                     // imei
+            .text("R;")                          // data type
+            .number("(d+)[+;]")                  // satellites
+            .number("(dd)(dd)(dd)")              // date
+            .number("(dd)(dd)(dd)[+;]")          // time
+            .number("(-?d+.d+)[+;]")             // latitude
+            .number("(-?d+.d+)[+;]")             // longitude
+            .number("(d+.d+)[+;]")               // speed
+            .number("(d+)[+;]")                  // course
+            .groupBegin()
+            .text("0x").number("(d+)[+;]")       // input
+            .number("(d+)[+;]")                  // message type
+            .number("(d+)[+;]")                  // odometer
+            .groupEnd("?")
+            .number("(d+)")                      // voltage
+            .any()
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.set(Position.KEY_SATELLITES, parser.nextInt());
+
+        position.setValid(true);
+        position.setTime(parser.nextDateTime());
+        position.setLatitude(parser.nextDouble());
+        position.setLongitude(parser.nextDouble());
+        position.setSpeed(UnitsConverter.knotsFromMps(parser.nextDouble()));
+        position.setCourse(parser.nextDouble());
+
+        if (parser.hasNext(3)) {
+            position.set(Position.KEY_INPUT, parser.nextHexInt());
+            position.set(Position.KEY_EVENT, parser.nextInt());
+            position.set(Position.KEY_ODOMETER, parser.nextInt());
+        }
+
+        position.set(Position.KEY_BATTERY, parser.nextInt() * 0.001);
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/ExtremTracProtocol.java b/src/main/java/org/traccar/protocol/ExtremTracProtocol.java
new file mode 100644
index 000000000..692fd4e99
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/ExtremTracProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LineBasedFrameDecoder;
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class ExtremTracProtocol extends BaseProtocol {
+
+    public ExtremTracProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LineBasedFrameDecoder(1024));
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new ExtremTracProtocolDecoder(ExtremTracProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/ExtremTracProtocolDecoder.java b/src/main/java/org/traccar/protocol/ExtremTracProtocolDecoder.java
new file mode 100644
index 000000000..9fde6f0a0
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/ExtremTracProtocolDecoder.java
@@ -0,0 +1,83 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class ExtremTracProtocolDecoder extends BaseProtocolDecoder {
+
+    public ExtremTracProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("$GPRMC,")
+            .number("(d+),")                     // device id
+            .number("(dd)(dd)(dd).(ddd),")       // time (hhmmss.sss)
+            .expression("([AV]),")               // validity
+            .number("(d+)(dd.d+),")              // latitude
+            .expression("([NS]),")
+            .number("(d+)(dd.d+),")              // longitude
+            .expression("([EW]),")
+            .number("(d+.?d*),")                 // speed
+            .number("(d+.?d*),")                 // course
+            .number("(dd)(dd)(dd),")             // date (ddmmyy)
+            .any()
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        DateBuilder dateBuilder = new DateBuilder()
+                .setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+
+        position.setValid(parser.next().equals("A"));
+        position.setLatitude(parser.nextCoordinate());
+        position.setLongitude(parser.nextCoordinate());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
+
+        dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+        position.setTime(dateBuilder.getDate());
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/FifotrackProtocol.java b/src/main/java/org/traccar/protocol/FifotrackProtocol.java
new file mode 100644
index 000000000..371e01e55
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/FifotrackProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LineBasedFrameDecoder;
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class FifotrackProtocol extends BaseProtocol {
+
+    public FifotrackProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LineBasedFrameDecoder(1024));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new FifotrackProtocolDecoder(FifotrackProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/FifotrackProtocolDecoder.java b/src/main/java/org/traccar/protocol/FifotrackProtocolDecoder.java
new file mode 100644
index 000000000..beaa34125
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/FifotrackProtocolDecoder.java
@@ -0,0 +1,198 @@
+/*
+ * Copyright 2016 - 2019 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.Checksum;
+import org.traccar.helper.DataConverter;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.CellTower;
+import org.traccar.model.Network;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class FifotrackProtocolDecoder extends BaseProtocolDecoder {
+
+    private ByteBuf photo;
+
+    public FifotrackProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("$$")
+            .number("d+,")                       // length
+            .number("(d+),")                     // imei
+            .number("x+,")                       // index
+            .expression("[^,]+,")                // type
+            .number("(d+)?,")                    // alarm
+            .number("(dd)(dd)(dd)")              // date (yymmdd)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .number("([AV]),")                   // validity
+            .number("(-?d+.d+),")                // latitude
+            .number("(-?d+.d+),")                // longitude
+            .number("(d+),")                     // speed
+            .number("(d+),")                     // course
+            .number("(-?d+),")                   // altitude
+            .number("(d+),")                     // odometer
+            .number("d+,")                       // runtime
+            .number("(xxxx),")                   // status
+            .number("(x+)?,")                    // input
+            .number("(x+)?,")                    // output
+            .number("(d+)|")                     // mcc
+            .number("(d+)|")                     // mnc
+            .number("(x+)|")                     // lac
+            .number("(x+),")                     // cid
+            .number("([x|]+)")                   // adc
+            .expression(",([^,]+)")              // rfid
+            .expression(",([^*]+)").optional(2)  // sensors
+            .any()
+            .compile();
+
+    private static final Pattern PATTERN_PHOTO = new PatternBuilder()
+            .text("$$")
+            .number("d+,")                       // length
+            .number("(d+),")                     // imei
+            .any()
+            .number(",(d+),")                    // length
+            .expression("([^*]+)")               // photo id
+            .text("*")
+            .number("xx")
+            .compile();
+
+    private static final Pattern PATTERN_PHOTO_DATA = new PatternBuilder()
+            .text("$$")
+            .number("d+,")                       // length
+            .number("(d+),")                     // imei
+            .expression("([^*]+),")              // photo id
+            .number("(d+),")                     // offset
+            .number("(d+),")                     // size
+            .number("(x+)")                      // data
+            .text("*")
+            .number("xx")
+            .compile();
+
+    private void requestPhoto(Channel channel, SocketAddress socketAddress, String imei, String file) {
+        if (channel != null) {
+            String content = "D06," + file + "," + photo.writerIndex() + "," + Math.min(1024, photo.writableBytes());
+            int length = 1 + imei.length() + 1 + content.length() + 5;
+            String response = String.format("@@%02d,%s,%s*", length, imei, content);
+            response += Checksum.sum(response) + "\r\n";
+            channel.writeAndFlush(new NetworkMessage(response, socketAddress));
+        }
+    }
+
+    private Object decodeLocation(
+            Channel channel, SocketAddress remoteAddress, String sentence) {
+
+        Parser parser = new Parser(PATTERN, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.set(Position.KEY_ALARM, parser.next());
+
+        position.setTime(parser.nextDateTime());
+
+        position.setValid(parser.next().equals("A"));
+        position.setLatitude(parser.nextDouble(0));
+        position.setLongitude(parser.nextDouble(0));
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextInt(0)));
+        position.setCourse(parser.nextInt(0));
+        position.setAltitude(parser.nextInt(0));
+
+        position.set(Position.KEY_ODOMETER, parser.nextLong(0));
+        position.set(Position.KEY_STATUS, parser.nextHexInt(0));
+        if (parser.hasNext()) {
+            position.set(Position.KEY_INPUT, parser.nextHexInt(0));
+        }
+        if (parser.hasNext()) {
+            position.set(Position.KEY_OUTPUT, parser.nextHexInt(0));
+        }
+
+        position.setNetwork(new Network(CellTower.from(
+                parser.nextInt(0), parser.nextInt(0), parser.nextHexInt(0), parser.nextHexInt(0))));
+
+        String[] adc = parser.next().split("\\|");
+        for (int i = 0; i < adc.length; i++) {
+            position.set(Position.PREFIX_ADC + (i + 1), Integer.parseInt(adc[i], 16));
+        }
+
+        position.set(Position.KEY_DRIVER_UNIQUE_ID, parser.next());
+
+        if (parser.hasNext()) {
+            String[] sensors = parser.next().split("\\|");
+            for (int i = 0; i < sensors.length; i++) {
+                position.set(Position.PREFIX_IO + (i + 1), sensors[i]);
+            }
+        }
+
+        return position;
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        String sentence = (String) msg;
+        int typeIndex = sentence.indexOf(',', sentence.indexOf(',', sentence.indexOf(',') + 1) + 1) + 1;
+        String type = sentence.substring(typeIndex, typeIndex + 3);
+
+        if (type.equals("D05")) {
+            Parser parser = new Parser(PATTERN_PHOTO, sentence);
+            if (parser.matches()) {
+                String imei = parser.next();
+                int length = parser.nextInt();
+                String photoId = parser.next();
+                photo = Unpooled.buffer(length);
+                requestPhoto(channel, remoteAddress, imei, photoId);
+            }
+        } else if (type.equals("D06")) {
+            Parser parser = new Parser(PATTERN_PHOTO_DATA, sentence);
+            if (parser.matches()) {
+                String imei = parser.next();
+                String photoId = parser.next();
+                parser.nextInt(); // offset
+                parser.nextInt(); // size
+                photo.writeBytes(DataConverter.parseHex(parser.next()));
+                requestPhoto(channel, remoteAddress, imei, photoId);
+            }
+        } else {
+            return decodeLocation(channel, remoteAddress, sentence);
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/FlespiProtocol.java b/src/main/java/org/traccar/protocol/FlespiProtocol.java
new file mode 100644
index 000000000..2c0729b76
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/FlespiProtocol.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.http.HttpObjectAggregator;
+import io.netty.handler.codec.http.HttpRequestDecoder;
+import io.netty.handler.codec.http.HttpResponseEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class FlespiProtocol extends BaseProtocol {
+
+    public FlespiProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new HttpResponseEncoder());
+                pipeline.addLast(new HttpRequestDecoder());
+                pipeline.addLast(new HttpObjectAggregator(Integer.MAX_VALUE));
+                pipeline.addLast(new FlespiProtocolDecoder(FlespiProtocol.this));
+            }
+        });
+    }
+}
diff --git a/src/main/java/org/traccar/protocol/FlespiProtocolDecoder.java b/src/main/java/org/traccar/protocol/FlespiProtocolDecoder.java
new file mode 100644
index 000000000..86da3943e
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/FlespiProtocolDecoder.java
@@ -0,0 +1,246 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import io.netty.handler.codec.http.FullHttpRequest;
+import io.netty.handler.codec.http.HttpResponseStatus;
+import org.traccar.BaseHttpProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.model.Position;
+
+import javax.json.Json;
+import javax.json.JsonArray;
+import javax.json.JsonNumber;
+import javax.json.JsonObject;
+import javax.json.JsonString;
+import javax.json.JsonValue;
+import java.io.StringReader;
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.Date;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
+
+public class FlespiProtocolDecoder extends BaseHttpProtocolDecoder {
+
+    public FlespiProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        FullHttpRequest request = (FullHttpRequest) msg;
+        JsonArray result = Json.createReader(new StringReader(request.content().toString(StandardCharsets.UTF_8)))
+                .readArray();
+        List<Position> positions = new LinkedList<>();
+        for (int i = 0; i < result.size(); i++) {
+            JsonObject message = result.getJsonObject(i);
+            JsonString ident = message.getJsonString("ident");
+            if (ident == null) {
+                continue;
+            }
+            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, ident.getString());
+            if (deviceSession == null) {
+                continue;
+            }
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+            decodePosition(message, position);
+            positions.add(position);
+        }
+
+        sendResponse(channel, HttpResponseStatus.OK);
+        return positions;
+    }
+
+    private void decodePosition(JsonObject object, Position position) {
+        for (Map.Entry<String, JsonValue> param : object.entrySet()) {
+            String paramName = param.getKey();
+            JsonValue paramValue = param.getValue();
+            int index = -1;
+            if (paramName.contains("#")) {
+                String[] parts = paramName.split("#");
+                paramName = parts[0];
+                index = Integer.parseInt(parts[1]);
+            }
+            if (!decodeParam(paramName, index, paramValue, position)) {
+                decodeUnknownParam(param.getKey(), param.getValue(), position);
+            }
+        }
+        if (position.getLatitude() == 0 && position.getLongitude() == 0) {
+            getLastLocation(position, position.getDeviceTime());
+        }
+    }
+
+    private boolean decodeParam(String name, int index, JsonValue value, Position position) {
+        switch (name) {
+            case "timestamp":
+                position.setTime(new Date(((JsonNumber) value).longValue() * 1000));
+                return true;
+            case "position.latitude":
+                position.setLatitude(((JsonNumber) value).doubleValue());
+                return true;
+            case "position.longitude":
+                position.setLongitude(((JsonNumber) value).doubleValue());
+                return true;
+            case "position.speed":
+                position.setSpeed(((JsonNumber) value).doubleValue());
+                return true;
+            case "position.direction":
+                position.setCourse(((JsonNumber) value).doubleValue());
+                return true;
+            case "position.altitude":
+                position.setAltitude(((JsonNumber) value).doubleValue());
+                return true;
+            case "position.satellites":
+                position.set(Position.KEY_SATELLITES, ((JsonNumber) value).intValue());
+                return true;
+            case "position.valid":
+                position.setValid(value == JsonValue.TRUE);
+                return true;
+            case "position.hdop":
+                position.set(Position.KEY_HDOP, ((JsonNumber) value).doubleValue());
+                return true;
+            case "position.pdop":
+                position.set(Position.KEY_PDOP, ((JsonNumber) value).doubleValue());
+                return true;
+            case "din":
+            case "dout":
+                position.set(name.equals("din") ? Position.KEY_INPUT : Position.KEY_OUTPUT,
+                        ((JsonNumber) value).intValue());
+                return true;
+            case "gps.vehicle.mileage":
+                position.set(Position.KEY_ODOMETER, ((JsonNumber) value).doubleValue());
+                return true;
+            case "external.powersource.voltage":
+                position.set(Position.KEY_POWER, ((JsonNumber) value).doubleValue());
+                return true;
+            case "battery.voltage":
+                position.set(Position.KEY_BATTERY, ((JsonNumber) value).doubleValue());
+                return true;
+            case "fuel.level":
+            case "can.fuel.level":
+                position.set(Position.KEY_FUEL_LEVEL, ((JsonNumber) value).doubleValue());
+                return true;
+            case "engine.rpm":
+            case "can.engine.rpm":
+                position.set(Position.KEY_RPM, ((JsonNumber) value).doubleValue());
+                return true;
+            case "can.engine.temperature":
+                position.set(Position.PREFIX_TEMP + (index > 0 ? index : 0), ((JsonNumber) value).doubleValue());
+                return true;
+            case "engine.ignition.status":
+                position.set(Position.KEY_IGNITION, value == JsonValue.TRUE);
+                return true;
+            case "movement.status":
+                position.set(Position.KEY_MOTION, value == JsonValue.TRUE);
+                return true;
+            case "device.temperature":
+                position.set(Position.KEY_DEVICE_TEMP, ((JsonNumber) value).doubleValue());
+                return true;
+            case "ibutton.code":
+                position.set(Position.KEY_DRIVER_UNIQUE_ID, ((JsonString) value).getString());
+                return true;
+            case "vehicle.vin":
+                position.set(Position.KEY_VIN, ((JsonString) value).getString());
+                return true;
+            case "alarm.event.trigger":
+                if (value == JsonValue.TRUE) {
+                    position.set(Position.KEY_ALARM, Position.ALARM_GENERAL);
+                }
+                return true;
+            case "towing.event.trigger":
+            case "towing.alarm.status":
+                if (value == JsonValue.TRUE) {
+                    position.set(Position.KEY_ALARM, Position.ALARM_TOW);
+                }
+                return true;
+            case "geofence.event.enter":
+                if (value == JsonValue.TRUE) {
+                    position.set(Position.KEY_ALARM, Position.ALARM_GEOFENCE_ENTER);
+                }
+                return true;
+            case "geofence.event.exit":
+                if (value == JsonValue.TRUE) {
+                    position.set(Position.KEY_ALARM, Position.ALARM_GEOFENCE_EXIT);
+                }
+                return true;
+            case "shock.event.trigger":
+                if (value == JsonValue.TRUE) {
+                    position.set(Position.KEY_ALARM, Position.ALARM_SHOCK);
+                }
+                return true;
+            case "overspeeding.event.trigger":
+                if (value == JsonValue.TRUE) {
+                    position.set(Position.KEY_ALARM, Position.ALARM_OVERSPEED);
+                }
+                return true;
+            case "harsh.acceleration.event.trigger":
+                if (value == JsonValue.TRUE) {
+                    position.set(Position.KEY_ALARM, Position.ALARM_ACCELERATION);
+                }
+                return true;
+            case "harsh.braking.event.trigger":
+                if (value == JsonValue.TRUE) {
+                    position.set(Position.KEY_ALARM, Position.ALARM_BRAKING);
+                }
+                return true;
+            case "harsh.cornering.event.trigger":
+                if (value == JsonValue.TRUE) {
+                    position.set(Position.KEY_ALARM, Position.ALARM_CORNERING);
+                }
+                return true;
+            case "gnss.antenna.cut.status":
+                if (value == JsonValue.TRUE) {
+                    position.set(Position.KEY_ALARM, Position.ALARM_GPS_ANTENNA_CUT);
+                }
+                return true;
+            case "gsm.jamming.event.trigger":
+                if (value == JsonValue.TRUE) {
+                    position.set(Position.KEY_ALARM, Position.ALARM_JAMMING);
+                }
+                return true;
+            case "hood.open.status":
+                if (value == JsonValue.TRUE) {
+                    position.set(Position.KEY_ALARM, Position.ALARM_BONNET);
+                }
+                return true;
+            default:
+                return false;
+        }
+    }
+
+    private void decodeUnknownParam(String name, JsonValue value, Position position) {
+        if (value instanceof JsonNumber) {
+            if (((JsonNumber) value).isIntegral()) {
+                position.set(name, ((JsonNumber) value).longValue());
+            } else {
+                position.set(name, ((JsonNumber) value).doubleValue());
+            }
+            position.set(name, ((JsonNumber) value).doubleValue());
+        } else if (value instanceof JsonString) {
+            position.set(name, ((JsonString) value).getString());
+        } else if (value == JsonValue.TRUE || value == JsonValue.FALSE) {
+            position.set(name, value == JsonValue.TRUE);
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/FlexCommProtocol.java b/src/main/java/org/traccar/protocol/FlexCommProtocol.java
new file mode 100644
index 000000000..9343ebeb8
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/FlexCommProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.FixedLengthFrameDecoder;
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class FlexCommProtocol extends BaseProtocol {
+
+    public FlexCommProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new FixedLengthFrameDecoder(2 + 2 + 101 + 5));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new FlexCommProtocolDecoder(FlexCommProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/FlexCommProtocolDecoder.java b/src/main/java/org/traccar/protocol/FlexCommProtocolDecoder.java
new file mode 100644
index 000000000..068c0a05c
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/FlexCommProtocolDecoder.java
@@ -0,0 +1,128 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.CellTower;
+import org.traccar.model.Network;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class FlexCommProtocolDecoder extends BaseProtocolDecoder {
+
+    public FlexCommProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("7E")
+            .number("(dd)")                      // status
+            .number("(d{15})")                   // imei
+            .number("(dddd)(dd)(dd)")            // date (yyyymmdd)
+            .number("(dd)(dd)(dd)")              // time (hhmmss)
+            .expression("([01])")                // valid
+            .number("(d{9})")                    // latitude
+            .number("(d{10})")                   // longitude
+            .number("(d{4})")                    // altitude
+            .number("(ddd)")                     // speed
+            .number("(ddd)")                     // course
+            .number("(dd)")                      // satellites view
+            .number("(dd)")                      // satellites used
+            .number("(dd)")                      // rssi
+            .number("(ddd)")                     // mcc
+            .number("(ddd)")                     // mnc
+            .number("(x{6})")                    // lac
+            .number("(x{6})")                    // cid
+            .expression("([01])([01])([01])")    // input
+            .expression("([01])([01])")          // output
+            .number("(ddd)")                     // fuel
+            .number("(d{4})")                    // temperature
+            .number("(ddd)")                     // battery
+            .number("(ddd)")                     // power
+            .any()
+            .compile();
+
+    private static double parseSignedValue(Parser parser, int decimalPoints) {
+        String stringValue = parser.next();
+        boolean negative = stringValue.charAt(0) == '1';
+        double value = Integer.parseInt(stringValue.substring(1)) * Math.pow(10, -decimalPoints);
+        return negative ? -value : value;
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+
+        position.set(Position.KEY_STATUS, parser.nextInt());
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setTime(parser.nextDateTime());
+        position.setValid(parser.next().equals("1"));
+        position.setLatitude(parseSignedValue(parser, 6));
+        position.setLongitude(parseSignedValue(parser, 6));
+        position.setAltitude(parseSignedValue(parser, 0));
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextInt()));
+        position.setCourse(parser.nextDouble(0));
+
+        position.set(Position.KEY_SATELLITES_VISIBLE, parser.nextInt());
+        position.set(Position.KEY_SATELLITES, parser.nextInt());
+        position.set(Position.KEY_RSSI, parser.nextInt());
+
+        position.setNetwork(new Network(CellTower.from(
+                parser.nextInt(), parser.nextInt(), parser.nextHexInt(), parser.nextHexInt())));
+
+        for (int i = 1; i <= 3; i++) {
+            position.set(Position.PREFIX_IN + i, parser.nextInt());
+        }
+
+        for (int i = 1; i <= 2; i++) {
+            position.set(Position.PREFIX_OUT + i, parser.nextInt());
+        }
+
+        position.set(Position.KEY_FUEL_LEVEL, parser.nextInt());
+        position.set(Position.PREFIX_TEMP + 1, parseSignedValue(parser, 0));
+        position.set(Position.KEY_BATTERY_LEVEL, parser.nextInt());
+        position.set(Position.KEY_POWER, parser.nextInt() * 0.1);
+
+        if (channel != null) {
+            channel.writeAndFlush(new NetworkMessage("{01}", remoteAddress));
+        }
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/FlextrackProtocol.java b/src/main/java/org/traccar/protocol/FlextrackProtocol.java
new file mode 100644
index 000000000..ddd1d58f0
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/FlextrackProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.CharacterDelimiterFrameDecoder;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class FlextrackProtocol extends BaseProtocol {
+
+    public FlextrackProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, "\r"));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new FlextrackProtocolDecoder(FlextrackProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/FlextrackProtocolDecoder.java b/src/main/java/org/traccar/protocol/FlextrackProtocolDecoder.java
new file mode 100644
index 000000000..9dce22ede
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/FlextrackProtocolDecoder.java
@@ -0,0 +1,144 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.CellTower;
+import org.traccar.model.Network;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class FlextrackProtocolDecoder extends BaseProtocolDecoder {
+
+    public FlextrackProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN_LOGON = new PatternBuilder()
+            .number("(-?d+),")                   // index
+            .text("LOGON,")
+            .number("(d+),")                     // node id
+            .number("(d+)")                      // iccid
+            .compile();
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .number("(-?d+),")                   // index
+            .text("UNITSTAT,")
+            .number("(dddd)(dd)(dd),")           // date (yyyymmdd)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .number("d+,")                       // node id
+            .number("([NS])(d+).(d+.d+),")       // latitude
+            .number("([EW])(d+).(d+.d+),")       // longitude
+            .number("(d+),")                     // speed
+            .number("(d+),")                     // course
+            .number("(d+),")                     // satellites
+            .number("(d+),")                     // battery
+            .number("(-?d+),")                   // gsm
+            .number("(x+),")                     // state
+            .number("(ddd)")                     // mcc
+            .number("(dd),")                     // mnc
+            .number("(-?d+),")                   // altitude
+            .number("(d+),")                     // hdop
+            .number("(x+),")                     // cell
+            .number("d+,")                       // gps fix time
+            .number("(x+),")                     // lac
+            .number("(d+)")                      // odometer
+            .compile();
+
+    private void sendAcknowledgement(Channel channel, SocketAddress remoteAddress, String index) {
+        if (channel != null) {
+            channel.writeAndFlush(new NetworkMessage(index + ",ACK\r", remoteAddress));
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        String sentence = (String) msg;
+
+        if (sentence.contains("LOGON")) {
+
+            Parser parser = new Parser(PATTERN_LOGON, sentence);
+            if (!parser.matches()) {
+                return null;
+            }
+
+            sendAcknowledgement(channel, remoteAddress, parser.next());
+
+            String id = parser.next();
+            String iccid = parser.next();
+
+            getDeviceSession(channel, remoteAddress, iccid, id);
+
+        } else if (sentence.contains("UNITSTAT")) {
+
+            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+            if (deviceSession == null) {
+                return null;
+            }
+
+            Parser parser = new Parser(PATTERN, sentence);
+            if (!parser.matches()) {
+                return null;
+            }
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            sendAcknowledgement(channel, remoteAddress, parser.next());
+
+            position.setTime(parser.nextDateTime());
+
+            position.setValid(true);
+            position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN));
+            position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN));
+            position.setSpeed(UnitsConverter.knotsFromKph(parser.nextInt(0)));
+            position.setCourse(parser.nextInt(0));
+
+            position.set(Position.KEY_SATELLITES, parser.nextInt(0));
+            position.set(Position.KEY_BATTERY, parser.nextInt(0));
+            int rssi = parser.nextInt(0);
+            position.set(Position.KEY_STATUS, parser.nextHexInt(0));
+
+            int mcc = parser.nextInt(0);
+            int mnc = parser.nextInt(0);
+
+            position.setAltitude(parser.nextInt(0));
+
+            position.set(Position.KEY_HDOP, parser.nextInt(0) * 0.1);
+
+            position.setNetwork(new Network(CellTower.from(
+                    mcc, mnc, parser.nextHexInt(0), parser.nextHexInt(0), rssi)));
+
+            position.set(Position.KEY_ODOMETER, parser.nextInt(0));
+
+            return position;
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/FoxProtocol.java b/src/main/java/org/traccar/protocol/FoxProtocol.java
new file mode 100644
index 000000000..9bac773b5
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/FoxProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.CharacterDelimiterFrameDecoder;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class FoxProtocol extends BaseProtocol {
+
+    public FoxProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, "</fox>"));
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new FoxProtocolDecoder(FoxProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/FoxProtocolDecoder.java b/src/main/java/org/traccar/protocol/FoxProtocolDecoder.java
new file mode 100644
index 000000000..449f00022
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/FoxProtocolDecoder.java
@@ -0,0 +1,124 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class FoxProtocolDecoder extends BaseProtocolDecoder {
+
+    public FoxProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .number("(d+),")                     // status id
+            .expression("([AV]),")               // validity
+            .number("(dd)(dd)(dd),")             // date (ddmmyy)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .number("(dd)(dd.d+),")              // latitude
+            .expression("([NS]),")
+            .number("(ddd)(dd.d+),")             // longitude
+            .expression("([EW]),")
+            .number("(d+.?d*)?,")                // speed
+            .number("(d+.?d*)?,")                // course
+            .expression("[^,]*,")                // cell info
+            .number("([01]+) ")                  // input
+            .number("(d+) ")                     // power
+            .number("(d+) ")                     // temperature
+            .number("(d+) ")                     // rpm
+            .number("(d+) ")                     // fuel
+            .number("(d+) ")                     // adc 1
+            .number("(d+) ")                     // adc 2
+            .number("([01]+) ")                  // output
+            .number("(d+),")                     // odometer
+            .expression("(.+)")                  // status info
+            .compile();
+
+    private String getAttribute(String xml, String key) {
+        int start = xml.indexOf(key + "=\"");
+        if (start != -1) {
+            start += key.length() + 2;
+            int end = xml.indexOf("\"", start);
+            if (end != -1) {
+                return xml.substring(start, end);
+            }
+        }
+        return null;
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        String xml = (String) msg;
+        String id = getAttribute(xml, "id");
+        String data = getAttribute(xml, "data");
+
+        if (id != null && data != null) {
+
+            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, id);
+            if (deviceSession == null) {
+                return null;
+            }
+
+            Parser parser = new Parser(PATTERN, data);
+            if (!parser.matches()) {
+                return null;
+            }
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            position.set(Position.KEY_STATUS, parser.nextInt(0));
+
+            position.setValid(parser.next().equals("A"));
+
+            position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
+            position.setLatitude(parser.nextCoordinate());
+            position.setLongitude(parser.nextCoordinate());
+            position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
+            position.setCourse(parser.nextDouble(0));
+
+            position.set(Position.KEY_INPUT, parser.nextBinInt(0));
+            position.set(Position.KEY_POWER, parser.nextDouble(0) * 0.1);
+            position.set(Position.PREFIX_TEMP + 1, parser.nextInt(0));
+            position.set(Position.KEY_RPM, parser.nextInt(0));
+            position.set(Position.KEY_FUEL_LEVEL, parser.nextInt(0));
+            position.set(Position.PREFIX_ADC + 1, parser.nextInt(0));
+            position.set(Position.PREFIX_ADC + 2, parser.nextInt(0));
+            position.set(Position.KEY_OUTPUT, parser.nextBinInt(0));
+            position.set(Position.KEY_ODOMETER, parser.nextInt(0));
+
+            position.set("statusData", parser.next());
+
+            return position;
+
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/FreedomProtocol.java b/src/main/java/org/traccar/protocol/FreedomProtocol.java
new file mode 100644
index 000000000..bc6b92d5f
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/FreedomProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LineBasedFrameDecoder;
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class FreedomProtocol extends BaseProtocol {
+
+    public FreedomProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LineBasedFrameDecoder(1024));
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new FreedomProtocolDecoder(FreedomProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/FreedomProtocolDecoder.java b/src/main/java/org/traccar/protocol/FreedomProtocolDecoder.java
new file mode 100644
index 000000000..1d2dd3133
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/FreedomProtocolDecoder.java
@@ -0,0 +1,77 @@
+/*
+ * Copyright 2014 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class FreedomProtocolDecoder extends BaseProtocolDecoder {
+
+    public FreedomProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("IMEI,")
+            .number("(d+),")                     // imei
+            .number("(dddd)/(dd)/(dd), ")        // date (yyyy/dd/mm)
+            .number("(dd):(dd):(dd), ")          // time (hh:mm:ss)
+            .expression("([NS]), ")
+            .number("Lat:(dd)(d+.d+), ")         // latitude
+            .expression("([EW]), ")
+            .number("Lon:(ddd)(d+.d+), ")        // longitude
+            .text("Spd:").number("(d+.d+)")      // speed
+            .any()
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setValid(true);
+
+        position.setTime(parser.nextDateTime());
+
+        position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN));
+        position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN));
+
+        position.setSpeed(parser.nextDouble(0));
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/FreematicsProtocol.java b/src/main/java/org/traccar/protocol/FreematicsProtocol.java
new file mode 100644
index 000000000..999b075a1
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/FreematicsProtocol.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class FreematicsProtocol extends BaseProtocol {
+
+    public FreematicsProtocol() {
+        addServer(new TrackerServer(true, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new FreematicsProtocolDecoder(FreematicsProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/FreematicsProtocolDecoder.java b/src/main/java/org/traccar/protocol/FreematicsProtocolDecoder.java
new file mode 100644
index 000000000..ba47699c3
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/FreematicsProtocolDecoder.java
@@ -0,0 +1,184 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.Checksum;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.Date;
+import java.util.LinkedList;
+import java.util.List;
+
+public class FreematicsProtocolDecoder extends BaseProtocolDecoder {
+
+    public FreematicsProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private Object decodeEvent(
+            Channel channel, SocketAddress remoteAddress, String sentence) {
+
+        DeviceSession deviceSession = null;
+        String event = null;
+        String time = null;
+
+        for (String pair : sentence.split(",")) {
+            String[] data = pair.split("=");
+            String key = data[0];
+            String value = data[1];
+            switch (key) {
+                case "ID":
+                case "VIN":
+                    if (deviceSession == null) {
+                        deviceSession = getDeviceSession(channel, remoteAddress, value);
+                    }
+                    break;
+                case "EV":
+                    event = value;
+                    break;
+                case "TS":
+                    time = value;
+                    break;
+                default:
+                    break;
+            }
+        }
+
+        if (channel != null && deviceSession != null && event != null && time != null) {
+            String message = String.format("1#EV=%s,RX=1,TS=%s", event, time);
+            message += '*' + Checksum.sum(message);
+            channel.writeAndFlush(new NetworkMessage(message, remoteAddress));
+        }
+
+        return null;
+    }
+
+    private Object decodePosition(
+            Channel channel, SocketAddress remoteAddress, String sentence) throws Exception {
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        List<Position> positions = new LinkedList<>();
+        Position position = null;
+        DateBuilder dateBuilder = null;
+
+        for (String pair : sentence.split(",")) {
+            String[] data = pair.split("[=:]");
+            int key = Integer.parseInt(data[0], 16);
+            String value = data[1];
+            switch (key) {
+                case 0x0:
+                    if (position != null) {
+                        position.setTime(dateBuilder.getDate());
+                        positions.add(position);
+                    }
+                    position = new Position(getProtocolName());
+                    position.setDeviceId(deviceSession.getDeviceId());
+                    position.setValid(true);
+                    dateBuilder = new DateBuilder(new Date());
+                    break;
+                case 0x11:
+                    value = ("000000" + value).substring(value.length());
+                    dateBuilder.setDateReverse(
+                            Integer.parseInt(value.substring(0, 2)),
+                            Integer.parseInt(value.substring(2, 4)),
+                            Integer.parseInt(value.substring(4)));
+                    break;
+                case 0x10:
+                    value = ("00000000" + value).substring(value.length());
+                    dateBuilder.setTime(
+                            Integer.parseInt(value.substring(0, 2)),
+                            Integer.parseInt(value.substring(2, 4)),
+                            Integer.parseInt(value.substring(4, 6)),
+                            Integer.parseInt(value.substring(6)) * 10);
+                    break;
+                case 0xA:
+                    position.setLatitude(Double.parseDouble(value));
+                    break;
+                case 0xB:
+                    position.setLongitude(Double.parseDouble(value));
+                    break;
+                case 0xC:
+                    position.setAltitude(Double.parseDouble(value));
+                    break;
+                case 0xD:
+                    position.setSpeed(UnitsConverter.knotsFromKph(Double.parseDouble(value)));
+                    break;
+                case 0xE:
+                    position.setCourse(Integer.parseInt(value));
+                    break;
+                case 0xF:
+                    position.set(Position.KEY_SATELLITES, Integer.parseInt(value));
+                    break;
+                case 0x20:
+                    position.set(Position.KEY_ACCELERATION, value);
+                    break;
+                case 0x24:
+                    position.set(Position.KEY_BATTERY, Integer.parseInt(value) * 0.01);
+                    break;
+                case 0x81:
+                    position.set(Position.KEY_RSSI, Integer.parseInt(value));
+                    break;
+                case 0x82:
+                    position.set(Position.KEY_DEVICE_TEMP, Integer.parseInt(value) * 0.1);
+                    break;
+                default:
+                    position.set(data[0], value);
+                    break;
+            }
+        }
+
+        if (position != null) {
+            position.setTime(dateBuilder.getDate());
+            positions.add(position);
+        }
+
+        return positions;
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        String sentence = (String) msg;
+        int startIndex = sentence.indexOf('#');
+        int endIndex = sentence.indexOf('*');
+
+        if (startIndex > 0 && endIndex > 0) {
+            sentence = sentence.substring(startIndex + 1, endIndex);
+
+            if (sentence.startsWith("EV")) {
+                return decodeEvent(channel, remoteAddress, sentence);
+            } else {
+                return decodePosition(channel, remoteAddress, sentence);
+            }
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/GalileoFrameDecoder.java b/src/main/java/org/traccar/protocol/GalileoFrameDecoder.java
new file mode 100644
index 000000000..c23d26c83
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/GalileoFrameDecoder.java
@@ -0,0 +1,43 @@
+/*
+ * Copyright 2013 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+import org.traccar.BaseFrameDecoder;
+
+public class GalileoFrameDecoder extends BaseFrameDecoder {
+
+    private static final int MESSAGE_MINIMUM_LENGTH = 5;
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+        if (buf.readableBytes() < MESSAGE_MINIMUM_LENGTH) {
+            return null;
+        }
+
+        int length = buf.getUnsignedShortLE(buf.readerIndex() + 1) & 0x7fff;
+        if (buf.readableBytes() >= (length + MESSAGE_MINIMUM_LENGTH)) {
+            return buf.readRetainedSlice(length + MESSAGE_MINIMUM_LENGTH);
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/GalileoProtocol.java b/src/main/java/org/traccar/protocol/GalileoProtocol.java
new file mode 100644
index 000000000..9b7fe1a4b
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/GalileoProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+import org.traccar.model.Command;
+
+public class GalileoProtocol extends BaseProtocol {
+
+    public GalileoProtocol() {
+        setSupportedDataCommands(
+                Command.TYPE_CUSTOM,
+                Command.TYPE_OUTPUT_CONTROL);
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new GalileoFrameDecoder());
+                pipeline.addLast(new GalileoProtocolEncoder());
+                pipeline.addLast(new GalileoProtocolDecoder(GalileoProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/GalileoProtocolDecoder.java b/src/main/java/org/traccar/protocol/GalileoProtocolDecoder.java
new file mode 100644
index 000000000..01c55a9ae
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/GalileoProtocolDecoder.java
@@ -0,0 +1,342 @@
+/*
+ * Copyright 2013 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.ByteBufUtil;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.Context;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.Date;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+public class GalileoProtocolDecoder extends BaseProtocolDecoder {
+
+    public GalileoProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private ByteBuf photo;
+
+    private static final Map<Integer, Integer> TAG_LENGTH_MAP = new HashMap<>();
+
+    static {
+        int[] l1 = {
+            0x01, 0x02, 0x35, 0x43, 0xc4, 0xc5, 0xc6, 0xc7,
+            0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf,
+            0xd0, 0xd1, 0xd2, 0xd5, 0x88, 0x8a, 0x8b, 0x8c,
+            0xa0, 0xaf, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6,
+            0xa7, 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae
+        };
+        int[] l2 = {
+            0x04, 0x10, 0x34, 0x40, 0x41, 0x42, 0x45, 0x46,
+            0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x60, 0x61,
+            0x62, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76,
+            0x77, 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6,
+            0xb7, 0xb8, 0xb9, 0xd6, 0xd7, 0xd8, 0xd9, 0xda
+        };
+        int[] l3 = {
+            0x63, 0x64, 0x6f, 0x5d, 0x65, 0x66, 0x67, 0x68,
+            0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e
+        };
+        int[] l4 = {
+            0x20, 0x33, 0x44, 0x90, 0xc0, 0xc2, 0xc3, 0xd3,
+            0xd4, 0xdb, 0xdc, 0xdd, 0xde, 0xdf, 0xf0, 0xf9,
+            0x5a, 0x47, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6,
+            0xf7, 0xf8, 0xe2, 0xe9
+        };
+        for (int i : l1) {
+            TAG_LENGTH_MAP.put(i, 1);
+        }
+        for (int i : l2) {
+            TAG_LENGTH_MAP.put(i, 2);
+        }
+        for (int i : l3) {
+            TAG_LENGTH_MAP.put(i, 3);
+        }
+        for (int i : l4) {
+            TAG_LENGTH_MAP.put(i, 4);
+        }
+        TAG_LENGTH_MAP.put(0x5b, 7); // variable length
+        TAG_LENGTH_MAP.put(0x5c, 68);
+    }
+
+    private static int getTagLength(int tag) {
+        Integer length = TAG_LENGTH_MAP.get(tag);
+        if (length == null) {
+            throw new IllegalArgumentException("Unknown tag: " + tag);
+        }
+        return length;
+    }
+
+    private void sendReply(Channel channel, int header, int checksum) {
+        if (channel != null) {
+            ByteBuf reply = Unpooled.buffer(3);
+            reply.writeByte(header);
+            reply.writeShortLE((short) checksum);
+            channel.writeAndFlush(new NetworkMessage(reply, channel.remoteAddress()));
+        }
+    }
+
+    private void decodeTag(Position position, ByteBuf buf, int tag) {
+        if (tag >= 0x50 && tag <= 0x57) {
+            position.set(Position.PREFIX_ADC + (tag - 0x50), buf.readUnsignedShortLE());
+        } else if (tag >= 0x60 && tag <= 0x62) {
+            position.set("fuel" + (tag - 0x60), buf.readUnsignedShortLE());
+        } else if (tag >= 0xa0 && tag <= 0xaf) {
+            position.set("can8BitR" + (tag - 0xa0 + 15), buf.readUnsignedByte());
+        } else if (tag >= 0xb0 && tag <= 0xb9) {
+            position.set("can16BitR" + (tag - 0xb0 + 5), buf.readUnsignedShortLE());
+        } else if (tag >= 0xc4 && tag <= 0xd2) {
+            position.set("can8BitR" + (tag - 0xc4), buf.readUnsignedByte());
+        } else if (tag >= 0xd6 && tag <= 0xda) {
+            position.set("can16BitR" + (tag - 0xd6), buf.readUnsignedShortLE());
+        } else if (tag >= 0xdb && tag <= 0xdf) {
+            position.set("can32BitR" + (tag - 0xdb), buf.readUnsignedIntLE());
+        } else if (tag >= 0xe2 && tag <= 0xe9) {
+            position.set("userData" + (tag - 0xe2), buf.readUnsignedIntLE());
+        } else if (tag >= 0xf0 && tag <= 0xf9) {
+            position.set("can32BitR" + (tag - 0xf0 + 5), buf.readUnsignedIntLE());
+        } else {
+            decodeTagOther(position, buf, tag);
+        }
+    }
+
+    private void decodeTagOther(Position position, ByteBuf buf, int tag) {
+        switch (tag) {
+            case 0x01:
+                position.set(Position.KEY_VERSION_HW, buf.readUnsignedByte());
+                break;
+            case 0x02:
+                position.set(Position.KEY_VERSION_FW, buf.readUnsignedByte());
+                break;
+            case 0x04:
+                position.set("deviceId", buf.readUnsignedShortLE());
+                break;
+            case 0x10:
+                position.set(Position.KEY_INDEX, buf.readUnsignedShortLE());
+                break;
+            case 0x20:
+                position.setTime(new Date(buf.readUnsignedIntLE() * 1000));
+                break;
+            case 0x33:
+                position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShortLE() * 0.1));
+                position.setCourse(buf.readUnsignedShortLE() * 0.1);
+                break;
+            case 0x34:
+                position.setAltitude(buf.readShortLE());
+                break;
+            case 0x35:
+                position.set(Position.KEY_HDOP, buf.readUnsignedByte() * 0.1);
+                break;
+            case 0x40:
+                position.set(Position.KEY_STATUS, buf.readUnsignedShortLE());
+                break;
+            case 0x41:
+                position.set(Position.KEY_POWER, buf.readUnsignedShortLE() / 1000.0);
+                break;
+            case 0x42:
+                position.set(Position.KEY_BATTERY, buf.readUnsignedShortLE() / 1000.0);
+                break;
+            case 0x43:
+                position.set(Position.KEY_DEVICE_TEMP, buf.readByte());
+                break;
+            case 0x44:
+                position.set(Position.KEY_ACCELERATION, buf.readUnsignedIntLE());
+                break;
+            case 0x45:
+                position.set(Position.KEY_OUTPUT, buf.readUnsignedShortLE());
+                break;
+            case 0x46:
+                position.set(Position.KEY_INPUT, buf.readUnsignedShortLE());
+                break;
+            case 0x48:
+                position.set("statusExtended", buf.readUnsignedShortLE());
+                break;
+            case 0x58:
+                position.set("rs2320", buf.readUnsignedShortLE());
+                break;
+            case 0x59:
+                position.set("rs2321", buf.readUnsignedShortLE());
+                break;
+            case 0x90:
+                position.set(Position.KEY_DRIVER_UNIQUE_ID, String.valueOf(buf.readUnsignedIntLE()));
+                break;
+            case 0xc0:
+                position.set("fuelTotal", buf.readUnsignedIntLE() * 0.5);
+                break;
+            case 0xc1:
+                position.set(Position.KEY_FUEL_LEVEL, buf.readUnsignedByte() * 0.4);
+                position.set(Position.PREFIX_TEMP + 1, buf.readUnsignedByte() - 40);
+                position.set(Position.KEY_RPM, buf.readUnsignedShortLE() * 0.125);
+                break;
+            case 0xc2:
+                position.set("canB0", buf.readUnsignedIntLE());
+                break;
+            case 0xc3:
+                position.set("canB1", buf.readUnsignedIntLE());
+                break;
+            case 0xd4:
+                position.set(Position.KEY_ODOMETER, buf.readUnsignedIntLE());
+                break;
+            case 0xe0:
+                position.set(Position.KEY_INDEX, buf.readUnsignedIntLE());
+                break;
+            case 0xe1:
+                position.set(Position.KEY_RESULT,
+                        buf.readSlice(buf.readUnsignedByte()).toString(StandardCharsets.US_ASCII));
+                break;
+            case 0xea:
+                position.set("userDataArray", ByteBufUtil.hexDump(buf.readSlice(buf.readUnsignedByte())));
+                position.set("userDataArray", ByteBufUtil.hexDump(buf.readSlice(buf.readUnsignedByte())));
+                break;
+            default:
+                buf.skipBytes(getTagLength(tag));
+                break;
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        int header = buf.readUnsignedByte();
+        if (header == 0x01) {
+            return decodePositions(channel, remoteAddress, buf);
+        } else if (header == 0x07) {
+            return decodePhoto(channel, remoteAddress, buf);
+        }
+
+        return null;
+    }
+
+    private Object decodePositions(
+            Channel channel, SocketAddress remoteAddress, ByteBuf buf) throws Exception {
+
+        int length = (buf.readUnsignedShortLE() & 0x7fff) + 3;
+
+        List<Position> positions = new LinkedList<>();
+        Set<Integer> tags = new HashSet<>();
+        boolean hasLocation = false;
+
+        DeviceSession deviceSession = null;
+        Position position = new Position(getProtocolName());
+
+        while (buf.readerIndex() < length) {
+
+            int tag = buf.readUnsignedByte();
+            if (tags.contains(tag)) {
+                if (hasLocation && position.getFixTime() != null) {
+                    positions.add(position);
+                }
+                tags.clear();
+                hasLocation = false;
+                position = new Position(getProtocolName()); // new position starts
+            }
+            tags.add(tag);
+
+            if (tag == 0x03) {
+                deviceSession = getDeviceSession(
+                        channel, remoteAddress, buf.readSlice(15).toString(StandardCharsets.US_ASCII));
+            } else if (tag == 0x30) {
+                hasLocation = true;
+                position.setValid((buf.readUnsignedByte() & 0xf0) == 0x00);
+                position.setLatitude(buf.readIntLE() / 1000000.0);
+                position.setLongitude(buf.readIntLE() / 1000000.0);
+            } else {
+                decodeTag(position, buf, tag);
+            }
+
+        }
+
+        if (deviceSession == null) {
+            deviceSession = getDeviceSession(channel, remoteAddress);
+            if (deviceSession == null) {
+                return null;
+            }
+        }
+
+        if (hasLocation && position.getFixTime() != null) {
+            positions.add(position);
+        } else if (position.getAttributes().containsKey(Position.KEY_RESULT)) {
+            position.setDeviceId(deviceSession.getDeviceId());
+            getLastLocation(position, null);
+            positions.add(position);
+        }
+
+        sendReply(channel, 0x02, buf.readUnsignedShortLE());
+
+        for (Position p : positions) {
+            p.setDeviceId(deviceSession.getDeviceId());
+        }
+
+        return positions.isEmpty() ? null : positions;
+    }
+
+    private Object decodePhoto(
+            Channel channel, SocketAddress remoteAddress, ByteBuf buf) throws Exception {
+
+        int length = buf.readUnsignedShortLE();
+
+        Position position = null;
+
+        if (length > 1) {
+
+            if (photo == null) {
+                photo = Unpooled.buffer();
+            }
+
+            buf.readUnsignedByte(); // part number
+            photo.writeBytes(buf, length - 1);
+
+        } else {
+
+            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+            String uniqueId = Context.getIdentityManager().getById(deviceSession.getDeviceId()).getUniqueId();
+
+            position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            getLastLocation(position, null);
+
+            position.set(Position.KEY_IMAGE, Context.getMediaManager().writeFile(uniqueId, photo, "jpg"));
+            photo.release();
+            photo = null;
+
+        }
+
+        sendReply(channel, 0x07, buf.readUnsignedShortLE());
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/GalileoProtocolEncoder.java b/src/main/java/org/traccar/protocol/GalileoProtocolEncoder.java
new file mode 100644
index 000000000..3b2145e74
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/GalileoProtocolEncoder.java
@@ -0,0 +1,67 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import org.traccar.BaseProtocolEncoder;
+import org.traccar.helper.Checksum;
+import org.traccar.model.Command;
+
+import java.nio.charset.StandardCharsets;
+
+public class GalileoProtocolEncoder extends BaseProtocolEncoder {
+
+    private ByteBuf encodeText(String uniqueId, String text) {
+
+        ByteBuf buf = Unpooled.buffer(256);
+
+        buf.writeByte(0x01);
+        buf.writeShortLE(uniqueId.length() + text.length() + 11);
+
+        buf.writeByte(0x03); // imei tag
+        buf.writeBytes(uniqueId.getBytes(StandardCharsets.US_ASCII));
+
+        buf.writeByte(0x04); // device id tag
+        buf.writeShortLE(0); // not needed if imei provided
+
+        buf.writeByte(0xE0); // index tag
+        buf.writeIntLE(0); // index
+
+        buf.writeByte(0xE1); // command text tag
+        buf.writeByte(text.length());
+        buf.writeBytes(text.getBytes(StandardCharsets.US_ASCII));
+
+        buf.writeShortLE(Checksum.crc16(Checksum.CRC16_MODBUS, buf.nioBuffer(0, buf.writerIndex())));
+
+        return buf;
+    }
+
+    @Override
+    protected Object encodeCommand(Command command) {
+
+        switch (command.getType()) {
+            case Command.TYPE_CUSTOM:
+                return encodeText(getUniqueId(command.getDeviceId()), command.getString(Command.KEY_DATA));
+            case Command.TYPE_OUTPUT_CONTROL:
+                return encodeText(getUniqueId(command.getDeviceId()),
+                        "Out " + command.getInteger(Command.KEY_INDEX) + "," + command.getString(Command.KEY_DATA));
+            default:
+                return null;
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/GatorProtocol.java b/src/main/java/org/traccar/protocol/GatorProtocol.java
new file mode 100644
index 000000000..ca81caefb
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/GatorProtocol.java
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LengthFieldBasedFrameDecoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class GatorProtocol extends BaseProtocol {
+
+    public GatorProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LengthFieldBasedFrameDecoder(1024, 3, 2));
+                pipeline.addLast(new GatorProtocolDecoder(GatorProtocol.this));
+            }
+        });
+        addServer(new TrackerServer(true, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new GatorProtocolDecoder(GatorProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/GatorProtocolDecoder.java b/src/main/java/org/traccar/protocol/GatorProtocolDecoder.java
new file mode 100644
index 000000000..31500bae6
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/GatorProtocolDecoder.java
@@ -0,0 +1,133 @@
+/*
+ * Copyright 2013 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.BcdUtil;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+
+public class GatorProtocolDecoder extends BaseProtocolDecoder {
+
+    public GatorProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    public static final int MSG_HEARTBEAT = 0x21;
+    public static final int MSG_POSITION_DATA = 0x80;
+    public static final int MSG_ROLLCALL_RESPONSE = 0x81;
+    public static final int MSG_ALARM_DATA = 0x82;
+    public static final int MSG_TERMINAL_STATUS = 0x83;
+    public static final int MSG_MESSAGE = 0x84;
+    public static final int MSG_TERMINAL_ANSWER = 0x85;
+    public static final int MSG_BLIND_AREA = 0x8E;
+    public static final int MSG_PICTURE_FRAME = 0x54;
+    public static final int MSG_CAMERA_RESPONSE = 0x56;
+    public static final int MSG_PICTURE_DATA = 0x57;
+
+    public static String decodeId(int b1, int b2, int b3, int b4) {
+
+        int d1 = 30 + ((b1 >> 7) << 3) + ((b2 >> 7) << 2) + ((b3 >> 7) << 1) + (b4 >> 7);
+        int d2 = b1 & 0x7f;
+        int d3 = b2 & 0x7f;
+        int d4 = b3 & 0x7f;
+        int d5 = b4 & 0x7f;
+
+        return String.format("%02d%02d%02d%02d%02d", d1, d2, d3, d4, d5);
+    }
+
+    private void sendResponse(Channel channel, SocketAddress remoteAddress, byte calibration) {
+        if (channel != null) {
+            ByteBuf response = Unpooled.buffer();
+            response.writeByte(0x24); response.writeByte(0x24); // header
+            response.writeByte(MSG_HEARTBEAT); // size
+            response.writeShort(5);
+            response.writeByte(calibration);
+            response.writeByte(0); // main order
+            response.writeByte(0); // slave order
+            response.writeByte(1); // calibration
+            response.writeByte(0x0D);
+            channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        buf.skipBytes(2); // header
+        int type = buf.readUnsignedByte();
+        buf.readUnsignedShort(); // length
+
+        String id = decodeId(
+                buf.readUnsignedByte(), buf.readUnsignedByte(),
+                buf.readUnsignedByte(), buf.readUnsignedByte());
+
+        sendResponse(channel, remoteAddress, buf.getByte(buf.writerIndex() - 2));
+
+        if (type == MSG_POSITION_DATA || type == MSG_ROLLCALL_RESPONSE
+                || type == MSG_ALARM_DATA || type == MSG_BLIND_AREA) {
+
+            Position position = new Position(getProtocolName());
+
+            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, "1" + id, id);
+            if (deviceSession == null) {
+                return null;
+            }
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            DateBuilder dateBuilder = new DateBuilder()
+                    .setYear(BcdUtil.readInteger(buf, 2))
+                    .setMonth(BcdUtil.readInteger(buf, 2))
+                    .setDay(BcdUtil.readInteger(buf, 2))
+                    .setHour(BcdUtil.readInteger(buf, 2))
+                    .setMinute(BcdUtil.readInteger(buf, 2))
+                    .setSecond(BcdUtil.readInteger(buf, 2));
+            position.setTime(dateBuilder.getDate());
+
+            position.setLatitude(BcdUtil.readCoordinate(buf));
+            position.setLongitude(BcdUtil.readCoordinate(buf));
+            position.setSpeed(UnitsConverter.knotsFromKph(BcdUtil.readInteger(buf, 4)));
+            position.setCourse(BcdUtil.readInteger(buf, 4));
+
+            int flags = buf.readUnsignedByte();
+            position.setValid((flags & 0x80) != 0);
+            position.set(Position.KEY_SATELLITES, flags & 0x0f);
+
+            position.set(Position.KEY_STATUS, buf.readUnsignedByte());
+            position.set("key", buf.readUnsignedByte());
+            position.set("oil", buf.readUnsignedShort() / 10.0);
+            position.set(Position.KEY_POWER, buf.readUnsignedByte() + buf.readUnsignedByte() * 0.01);
+            position.set(Position.KEY_ODOMETER, buf.readUnsignedInt());
+
+            return position;
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/GenxProtocol.java b/src/main/java/org/traccar/protocol/GenxProtocol.java
new file mode 100644
index 000000000..c87ba946a
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/GenxProtocol.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LineBasedFrameDecoder;
+import io.netty.handler.codec.string.StringDecoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class GenxProtocol extends BaseProtocol {
+
+    public GenxProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LineBasedFrameDecoder(1024));
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new GenxProtocolDecoder(GenxProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/GenxProtocolDecoder.java b/src/main/java/org/traccar/protocol/GenxProtocolDecoder.java
new file mode 100644
index 000000000..2ae9de7a0
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/GenxProtocolDecoder.java
@@ -0,0 +1,99 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.Context;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.text.SimpleDateFormat;
+
+public class GenxProtocolDecoder extends BaseProtocolDecoder {
+
+    private int[] reportColumns;
+
+    public GenxProtocolDecoder(Protocol protocol) {
+        super(protocol);
+        setReportColumns(Context.getConfig().getString(getProtocolName() + ".reportColumns", "1,2,3,4"));
+    }
+
+    public void setReportColumns(String format) {
+        String[] columns = format.split(",");
+        reportColumns = new int[columns.length];
+        for (int i = 0; i < columns.length; i++) {
+            reportColumns[i] = Integer.parseInt(columns[i]);
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        String[] values = ((String) msg).split(",");
+
+        Position position = new Position(getProtocolName());
+        position.setValid(true);
+
+        for (int i = 0; i < Math.min(values.length, reportColumns.length); i++) {
+            switch (reportColumns[i]) {
+                case 1:
+                case 28:
+                    DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, values[i]);
+                    if (deviceSession != null) {
+                        position.setDeviceId(deviceSession.getDeviceId());
+                    }
+                    break;
+                case 2:
+                    position.setTime(new SimpleDateFormat("MM/dd/yy HH:mm:ss").parse(values[i]));
+                    break;
+                case 3:
+                    position.setLatitude(Double.parseDouble(values[i]));
+                    break;
+                case 4:
+                    position.setLongitude(Double.parseDouble(values[i]));
+                    break;
+                case 11:
+                    position.set(Position.KEY_IGNITION, values[i].equals("ON"));
+                    break;
+                case 13:
+                    position.setSpeed(UnitsConverter.knotsFromKph(Integer.parseInt(values[i])));
+                    break;
+                case 17:
+                    position.setCourse(Integer.parseInt(values[i]));
+                    break;
+                case 23:
+                    position.set(Position.KEY_ODOMETER, Double.parseDouble(values[i]) * 1000);
+                    break;
+                case 27:
+                    position.setAltitude(UnitsConverter.metersFromFeet(Integer.parseInt(values[i])));
+                    break;
+                case 46:
+                    position.set(Position.KEY_SATELLITES, Integer.parseInt(values[i]));
+                    break;
+                default:
+                    break;
+            }
+        }
+
+        return position.getDeviceId() != 0 ? position : null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Gl100Protocol.java b/src/main/java/org/traccar/protocol/Gl100Protocol.java
new file mode 100644
index 000000000..063e606db
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Gl100Protocol.java
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.CharacterDelimiterFrameDecoder;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class Gl100Protocol extends BaseProtocol {
+
+    public Gl100Protocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, '\0'));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new Gl100ProtocolDecoder(Gl100Protocol.this));
+            }
+        });
+        addServer(new TrackerServer(true, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new Gl100ProtocolDecoder(Gl100Protocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Gl100ProtocolDecoder.java b/src/main/java/org/traccar/protocol/Gl100ProtocolDecoder.java
new file mode 100644
index 000000000..ae0383e5c
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Gl100ProtocolDecoder.java
@@ -0,0 +1,97 @@
+/*
+ * Copyright 2012 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class Gl100ProtocolDecoder extends BaseProtocolDecoder {
+
+    public Gl100ProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("+RESP:")
+            .expression("GT...,")
+            .number("(d{15}),")                  // imei
+            .groupBegin()
+            .number("d+,")                       // number
+            .number("d,")                        // reserved / geofence id
+            .number("d+")                        // reserved / geofence alert // battery
+            .or()
+            .number("[^,]*")                     // calling number
+            .groupEnd(",")
+            .expression("([01]),")               // gps fix
+            .number("(d+.d),")                   // speed
+            .number("(d+),")                     // course
+            .number("(-?d+.d),")                 // altitude
+            .number("d*,")                       // gps accuracy
+            .number("(-?d+.d+),")                // longitude
+            .number("(-?d+.d+),")                // latitude
+            .number("(dddd)(dd)(dd)")            // date (yyyymmdd)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .any()
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        String sentence = (String) msg;
+
+        if (sentence.contains("AT+GTHBD=") && channel != null) {
+            String response = "+RESP:GTHBD,GPRS ACTIVE,";
+            response += sentence.substring(9, sentence.lastIndexOf(','));
+            response += '\0';
+            channel.writeAndFlush(new NetworkMessage(response, remoteAddress)); // heartbeat response
+        }
+
+        Parser parser = new Parser(PATTERN, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setValid(parser.nextInt(0) == 0);
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
+        position.setAltitude(parser.nextDouble(0));
+        position.setLongitude(parser.nextDouble(0));
+        position.setLatitude(parser.nextDouble(0));
+
+        position.setTime(parser.nextDateTime());
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Gl200BinaryProtocolDecoder.java b/src/main/java/org/traccar/protocol/Gl200BinaryProtocolDecoder.java
new file mode 100644
index 000000000..c3339bea5
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Gl200BinaryProtocolDecoder.java
@@ -0,0 +1,403 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.BitBuffer;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.CellTower;
+import org.traccar.model.Network;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.Date;
+import java.util.LinkedList;
+import java.util.List;
+
+public class Gl200BinaryProtocolDecoder extends BaseProtocolDecoder {
+
+    public Gl200BinaryProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private Date decodeTime(ByteBuf buf) {
+        DateBuilder dateBuilder = new DateBuilder()
+                .setDate(buf.readUnsignedShort(), buf.readUnsignedByte(), buf.readUnsignedByte())
+                .setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte());
+        return dateBuilder.getDate();
+    }
+
+    public static final int MSG_RSP_LCB = 3;
+    public static final int MSG_RSP_GEO = 8;
+    public static final int MSG_RSP_COMPRESSED = 100;
+
+    private List<Position> decodeLocation(Channel channel, SocketAddress remoteAddress, ByteBuf buf) {
+
+        List<Position> positions = new LinkedList<>();
+
+        int type = buf.readUnsignedByte();
+
+        buf.readUnsignedInt(); // mask
+        buf.readUnsignedShort(); // length
+        buf.readUnsignedByte(); // device type
+        buf.readUnsignedShort(); // protocol version
+        buf.readUnsignedShort(); // firmware version
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, String.format("%015d", buf.readLong()));
+        if (deviceSession == null) {
+            return null;
+        }
+
+        int battery = buf.readUnsignedByte();
+        int power = buf.readUnsignedShort();
+
+        if (type == MSG_RSP_GEO) {
+            buf.readUnsignedByte(); // reserved
+            buf.readUnsignedByte(); // reserved
+        }
+
+        buf.readUnsignedByte(); // motion status
+        int satellites = buf.readUnsignedByte();
+
+        if (type != MSG_RSP_COMPRESSED) {
+            buf.readUnsignedByte(); // index
+        }
+
+        if (type == MSG_RSP_LCB) {
+            buf.readUnsignedByte(); // phone length
+            for (int b = buf.readUnsignedByte();; b = buf.readUnsignedByte()) {
+                if ((b & 0xf) == 0xf || (b & 0xf0) == 0xf0) {
+                    break;
+                }
+            }
+        }
+
+        if (type == MSG_RSP_COMPRESSED) {
+
+            int count = buf.readUnsignedShort();
+
+            BitBuffer bits;
+            int speed = 0;
+            int heading = 0;
+            int latitude = 0;
+            int longitude = 0;
+            long time = 0;
+
+            for (int i = 0; i < count; i++) {
+
+                if (time > 0) {
+                    time += 1;
+                }
+
+                Position position = new Position(getProtocolName());
+                position.setDeviceId(deviceSession.getDeviceId());
+
+                switch (BitUtil.from(buf.getUnsignedByte(buf.readerIndex()), 8 - 2)) {
+                    case 1:
+                        bits = new BitBuffer(buf.readSlice(3));
+                        bits.readUnsigned(2); // point attribute
+                        bits.readUnsigned(1); // fix type
+                        speed = bits.readUnsigned(12);
+                        heading = bits.readUnsigned(9);
+                        longitude = buf.readInt();
+                        latitude = buf.readInt();
+                        if (time == 0) {
+                            time = buf.readUnsignedInt();
+                        }
+                        break;
+                    case 2:
+                        bits = new BitBuffer(buf.readSlice(5));
+                        bits.readUnsigned(2); // point attribute
+                        bits.readUnsigned(1); // fix type
+                        speed += bits.readSigned(7);
+                        heading += bits.readSigned(7);
+                        longitude += bits.readSigned(12);
+                        latitude += bits.readSigned(11);
+                        break;
+                    default:
+                        buf.readUnsignedByte(); // invalid or same
+                        continue;
+                }
+
+                position.setValid(true);
+                position.setTime(new Date(time * 1000));
+                position.setSpeed(UnitsConverter.knotsFromKph(speed * 0.1));
+                position.setCourse(heading);
+                position.setLongitude(longitude * 0.000001);
+                position.setLatitude(latitude * 0.000001);
+
+                positions.add(position);
+
+            }
+
+        } else {
+
+            int count = buf.readUnsignedByte();
+
+            for (int i = 0; i < count; i++) {
+
+                Position position = new Position(getProtocolName());
+                position.setDeviceId(deviceSession.getDeviceId());
+
+                position.set(Position.KEY_BATTERY_LEVEL, battery);
+                position.set(Position.KEY_POWER, power);
+                position.set(Position.KEY_SATELLITES, satellites);
+
+                int hdop = buf.readUnsignedByte();
+                position.setValid(hdop > 0);
+                position.set(Position.KEY_HDOP, hdop);
+
+                position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedMedium() * 0.1));
+                position.setCourse(buf.readUnsignedShort());
+                position.setAltitude(buf.readShort());
+                position.setLongitude(buf.readInt() * 0.000001);
+                position.setLatitude(buf.readInt() * 0.000001);
+
+                position.setTime(decodeTime(buf));
+
+                position.setNetwork(new Network(CellTower.from(
+                        buf.readUnsignedShort(), buf.readUnsignedShort(),
+                        buf.readUnsignedShort(), buf.readUnsignedShort())));
+
+                buf.readUnsignedByte(); // reserved
+
+                positions.add(position);
+
+            }
+
+        }
+
+        return positions;
+    }
+
+    public static final int MSG_EVT_BPL = 6;
+    public static final int MSG_EVT_VGN = 45;
+    public static final int MSG_EVT_VGF = 46;
+    public static final int MSG_EVT_UPD = 15;
+    public static final int MSG_EVT_IDF = 17;
+    public static final int MSG_EVT_GSS = 21;
+    public static final int MSG_EVT_GES = 26;
+    public static final int MSG_EVT_GPJ = 31;
+    public static final int MSG_EVT_RMD = 35;
+    public static final int MSG_EVT_JDS = 33;
+    public static final int MSG_EVT_CRA = 23;
+    public static final int MSG_EVT_UPC = 34;
+
+    private Position decodeEvent(Channel channel, SocketAddress remoteAddress, ByteBuf buf) {
+
+        Position position = new Position(getProtocolName());
+
+        int type = buf.readUnsignedByte();
+
+        buf.readUnsignedInt(); // mask
+        buf.readUnsignedShort(); // length
+        buf.readUnsignedByte(); // device type
+        buf.readUnsignedShort(); // protocol version
+
+        position.set(Position.KEY_VERSION_FW, String.valueOf(buf.readUnsignedShort()));
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, String.format("%015d", buf.readLong()));
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.set(Position.KEY_BATTERY_LEVEL, buf.readUnsignedByte());
+        position.set(Position.KEY_POWER, buf.readUnsignedShort());
+
+        buf.readUnsignedByte(); // motion status
+
+        position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
+
+        switch (type) {
+            case MSG_EVT_BPL:
+                buf.readUnsignedShort(); // backup battery voltage
+                break;
+            case MSG_EVT_VGN:
+            case MSG_EVT_VGF:
+                buf.readUnsignedShort(); // reserved
+                buf.readUnsignedByte(); // report type
+                buf.readUnsignedInt(); // ignition duration
+                break;
+            case MSG_EVT_UPD:
+                buf.readUnsignedShort(); // code
+                buf.readUnsignedByte(); // retry
+                break;
+            case MSG_EVT_IDF:
+                buf.readUnsignedInt(); // idling duration
+                break;
+            case MSG_EVT_GSS:
+                buf.readUnsignedByte(); // gps signal status
+                buf.readUnsignedInt(); // reserved
+                break;
+            case MSG_EVT_GES:
+                buf.readUnsignedShort(); // trigger geo id
+                buf.readUnsignedByte(); // trigger geo enable
+                buf.readUnsignedByte(); // trigger mode
+                buf.readUnsignedInt(); // radius
+                buf.readUnsignedInt(); // check interval
+                break;
+            case MSG_EVT_GPJ:
+                buf.readUnsignedByte(); // cw jamming value
+                buf.readUnsignedByte(); // gps jamming state
+                break;
+            case MSG_EVT_RMD:
+                buf.readUnsignedByte(); // roaming state
+                break;
+            case MSG_EVT_JDS:
+                buf.readUnsignedByte(); // jamming state
+                break;
+            case MSG_EVT_CRA:
+                buf.readUnsignedByte(); // crash counter
+                break;
+            case MSG_EVT_UPC:
+                buf.readUnsignedByte(); // command id
+                buf.readUnsignedShort(); // result
+                break;
+            default:
+                break;
+        }
+
+        buf.readUnsignedByte(); // count
+
+        int hdop = buf.readUnsignedByte();
+        position.setValid(hdop > 0);
+        position.set(Position.KEY_HDOP, hdop);
+
+        position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedMedium() * 0.1));
+        position.setCourse(buf.readUnsignedShort());
+        position.setAltitude(buf.readShort());
+        position.setLongitude(buf.readInt() * 0.000001);
+        position.setLatitude(buf.readInt() * 0.000001);
+
+        position.setTime(decodeTime(buf));
+
+        position.setNetwork(new Network(CellTower.from(
+                buf.readUnsignedShort(), buf.readUnsignedShort(),
+                buf.readUnsignedShort(), buf.readUnsignedShort())));
+
+        buf.readUnsignedByte(); // reserved
+
+        return position;
+    }
+
+    public static final int MSG_INF_GPS = 2;
+    public static final int MSG_INF_CID = 4;
+    public static final int MSG_INF_CSQ = 5;
+    public static final int MSG_INF_VER = 6;
+    public static final int MSG_INF_BAT = 7;
+    public static final int MSG_INF_TMZ = 9;
+    public static final int MSG_INF_GIR = 10;
+
+    private Position decodeInformation(Channel channel, SocketAddress remoteAddress, ByteBuf buf) {
+
+        Position position = new Position(getProtocolName());
+
+        int type = buf.readUnsignedByte();
+
+        buf.readUnsignedInt(); // mask
+        buf.readUnsignedShort(); // length
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, String.format("%015d", buf.readLong()));
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        buf.readUnsignedByte(); // device type
+        buf.readUnsignedShort(); // protocol version
+
+        position.set(Position.KEY_VERSION_FW, String.valueOf(buf.readUnsignedShort()));
+
+        if (type == MSG_INF_VER) {
+            buf.readUnsignedShort(); // hardware version
+            buf.readUnsignedShort(); // mcu version
+            buf.readUnsignedShort(); // reserved
+        }
+
+        buf.readUnsignedByte(); // motion status
+        buf.readUnsignedByte(); // reserved
+
+        position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
+
+        buf.readUnsignedByte(); // mode
+        buf.skipBytes(7); // last fix time
+        buf.readUnsignedByte(); // reserved
+        buf.readUnsignedByte();
+        buf.readUnsignedShort(); // response report mask
+        buf.readUnsignedShort(); // ign interval
+        buf.readUnsignedShort(); // igf interval
+        buf.readUnsignedInt(); // reserved
+        buf.readUnsignedByte(); // reserved
+
+        if (type == MSG_INF_BAT) {
+            position.set(Position.KEY_CHARGE, buf.readUnsignedByte() != 0);
+            position.set(Position.KEY_POWER, buf.readUnsignedShort() * 0.001);
+            position.set(Position.KEY_BATTERY, buf.readUnsignedShort() * 0.001);
+            position.set(Position.KEY_BATTERY_LEVEL, buf.readUnsignedByte());
+        }
+
+        buf.skipBytes(10); // iccid
+
+        if (type == MSG_INF_CSQ) {
+            position.set(Position.KEY_RSSI, buf.readUnsignedByte());
+            buf.readUnsignedByte();
+        }
+
+        buf.readUnsignedByte(); // time zone flags
+        buf.readUnsignedShort(); // time zone offset
+
+        if (type == MSG_INF_GIR) {
+            buf.readUnsignedByte(); // gir trigger
+            buf.readUnsignedByte(); // cell number
+            position.setNetwork(new Network(CellTower.from(
+                    buf.readUnsignedShort(), buf.readUnsignedShort(),
+                    buf.readUnsignedShort(), buf.readUnsignedShort())));
+            buf.readUnsignedByte(); // ta
+            buf.readUnsignedByte(); // rx level
+        }
+
+        getLastLocation(position, decodeTime(buf));
+
+        return position;
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        switch (buf.readSlice(4).toString(StandardCharsets.US_ASCII)) {
+            case "+RSP":
+                return decodeLocation(channel, remoteAddress, buf);
+            case "+INF":
+                return decodeInformation(channel, remoteAddress, buf);
+            case "+EVT":
+                return decodeEvent(channel, remoteAddress, buf);
+            default:
+                return null;
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Gl200FrameDecoder.java b/src/main/java/org/traccar/protocol/Gl200FrameDecoder.java
new file mode 100644
index 000000000..c192cc28d
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Gl200FrameDecoder.java
@@ -0,0 +1,97 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseFrameDecoder;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+
+import java.nio.charset.StandardCharsets;
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.Set;
+
+public class Gl200FrameDecoder extends BaseFrameDecoder {
+
+    private static final int MINIMUM_LENGTH = 11;
+
+    private static final Set<String> BINARY_HEADERS = new HashSet<>(
+            Arrays.asList("+RSP", "+BSP", "+EVT", "+BVT", "+INF", "+BNF", "+HBD", "+CRD", "+BRD"));
+
+    public static boolean isBinary(ByteBuf buf) {
+        String header = buf.toString(buf.readerIndex(), 4, StandardCharsets.US_ASCII);
+        if (header.equals("+ACK")) {
+            return buf.getByte(buf.readerIndex() + header.length()) != (byte) ':';
+        } else {
+            return BINARY_HEADERS.contains(header);
+        }
+    }
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+        if (buf.readableBytes() < MINIMUM_LENGTH) {
+            return null;
+        }
+
+        if (isBinary(buf)) {
+
+            int length;
+            switch (buf.toString(buf.readerIndex(), 4, StandardCharsets.US_ASCII)) {
+                case "+ACK":
+                    length = buf.getUnsignedByte(buf.readerIndex() + 6);
+                    break;
+                case "+INF":
+                case "+BNF":
+                    length = buf.getUnsignedShort(buf.readerIndex() + 7);
+                    break;
+                case "+HBD":
+                    length = buf.getUnsignedByte(buf.readerIndex() + 5);
+                    break;
+                case "+CRD":
+                case "+BRD":
+                    length = buf.getUnsignedShort(buf.readerIndex() + 6);
+                    break;
+                default:
+                    length = buf.getUnsignedShort(buf.readerIndex() + 9);
+                    break;
+            }
+
+            if (buf.readableBytes() >= length) {
+                return buf.readRetainedSlice(length);
+            }
+
+        } else {
+
+            int endIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '$');
+            if (endIndex < 0) {
+                endIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) 0);
+            }
+            if (endIndex > 0) {
+                ByteBuf frame = buf.readRetainedSlice(endIndex - buf.readerIndex());
+                buf.readByte(); // delimiter
+                return frame;
+            }
+
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Gl200Protocol.java b/src/main/java/org/traccar/protocol/Gl200Protocol.java
new file mode 100644
index 000000000..c5343dae0
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Gl200Protocol.java
@@ -0,0 +1,53 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+import org.traccar.model.Command;
+
+import io.netty.handler.codec.string.StringEncoder;
+
+public class Gl200Protocol extends BaseProtocol {
+
+    public Gl200Protocol() {
+        setSupportedDataCommands(
+                Command.TYPE_POSITION_SINGLE,
+                Command.TYPE_ENGINE_STOP,
+                Command.TYPE_ENGINE_RESUME,
+                Command.TYPE_IDENTIFICATION,
+                Command.TYPE_REBOOT_DEVICE);
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new Gl200FrameDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new Gl200ProtocolEncoder());
+                pipeline.addLast(new Gl200ProtocolDecoder(Gl200Protocol.this));
+            }
+        });
+        addServer(new TrackerServer(true, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new Gl200ProtocolEncoder());
+                pipeline.addLast(new Gl200ProtocolDecoder(Gl200Protocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Gl200ProtocolDecoder.java b/src/main/java/org/traccar/protocol/Gl200ProtocolDecoder.java
new file mode 100644
index 000000000..ca1df7a13
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Gl200ProtocolDecoder.java
@@ -0,0 +1,50 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseProtocolDecoder;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import org.traccar.Protocol;
+
+import java.net.SocketAddress;
+
+public class Gl200ProtocolDecoder extends BaseProtocolDecoder {
+
+    private final Gl200TextProtocolDecoder textProtocolDecoder;
+    private final Gl200BinaryProtocolDecoder binaryProtocolDecoder;
+
+    public Gl200ProtocolDecoder(Protocol protocol) {
+        super(protocol);
+        textProtocolDecoder = new Gl200TextProtocolDecoder(protocol);
+        binaryProtocolDecoder = new Gl200BinaryProtocolDecoder(protocol);
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        if (Gl200FrameDecoder.isBinary(buf)) {
+            return binaryProtocolDecoder.decode(channel, remoteAddress, msg);
+        } else {
+            return textProtocolDecoder.decode(channel, remoteAddress, msg);
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Gl200ProtocolEncoder.java b/src/main/java/org/traccar/protocol/Gl200ProtocolEncoder.java
new file mode 100644
index 000000000..285106c67
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Gl200ProtocolEncoder.java
@@ -0,0 +1,46 @@
+/*
+ * Copyright 2016 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.StringProtocolEncoder;
+import org.traccar.model.Command;
+
+public class Gl200ProtocolEncoder extends StringProtocolEncoder {
+
+    @Override
+    protected Object encodeCommand(Command command) {
+
+        initDevicePassword(command, "");
+
+        switch (command.getType()) {
+            case Command.TYPE_POSITION_SINGLE:
+                return formatCommand(command, "AT+GTRTO={%s},1,,,,,,FFFF$", Command.KEY_DEVICE_PASSWORD);
+            case Command.TYPE_ENGINE_STOP:
+                return formatCommand(command, "AT+GTOUT={%s},1,,,0,0,0,0,0,0,0,,,,,,,FFFF$",
+                        Command.KEY_DEVICE_PASSWORD);
+            case Command.TYPE_ENGINE_RESUME:
+                return formatCommand(command, "AT+GTOUT={%s},0,,,0,0,0,0,0,0,0,,,,,,,FFFF$",
+                        Command.KEY_DEVICE_PASSWORD);
+            case Command.TYPE_IDENTIFICATION:
+                return formatCommand(command, "AT+GTRTO={%s},8,,,,,,FFFF$", Command.KEY_DEVICE_PASSWORD);
+            case Command.TYPE_REBOOT_DEVICE:
+                return formatCommand(command, "AT+GTRTO={%s},3,,,,,,FFFF$", Command.KEY_DEVICE_PASSWORD);
+            default:
+                return null;
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Gl200TextProtocolDecoder.java b/src/main/java/org/traccar/protocol/Gl200TextProtocolDecoder.java
new file mode 100644
index 000000000..aeb57a116
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Gl200TextProtocolDecoder.java
@@ -0,0 +1,1266 @@
+/*
+ * Copyright 2012 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.Context;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.CellTower;
+import org.traccar.model.Network;
+import org.traccar.model.Position;
+import org.traccar.model.WifiAccessPoint;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.text.DateFormat;
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.TimeZone;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
+
+    private boolean ignoreFixTime;
+
+    public Gl200TextProtocolDecoder(Protocol protocol) {
+        super(protocol);
+
+        ignoreFixTime = Context.getConfig().getBoolean(getProtocolName() + ".ignoreFixTime");
+    }
+
+    private static final Pattern PATTERN_ACK = new PatternBuilder()
+            .text("+ACK:GT")
+            .expression("...,")                  // type
+            .number("([0-9A-Z]{2}xxxx),")        // protocol version
+            .number("(d{15}|x{14}),")            // imei
+            .any().text(",")
+            .number("(dddd)(dd)(dd)")            // date (yyyymmdd)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .number("(xxxx)")                    // counter
+            .text("$").optional()
+            .compile();
+
+    private static final Pattern PATTERN_INF = new PatternBuilder()
+            .text("+").expression("(?:RESP|BUFF):GTINF,")
+            .number("[0-9A-Z]{2}xxxx,")          // protocol version
+            .number("(d{15}|x{14}),")            // imei
+            .expression("(?:[0-9A-Z]{17},)?")    // vin
+            .expression("(?:[^,]+)?,")           // device name
+            .number("(xx),")                     // state
+            .expression("(?:[0-9Ff]{20})?,")     // iccid
+            .number("(d{1,2}),")                 // rssi
+            .number("d{1,2},")
+            .expression("[01],")                 // external power
+            .number("([d.]+)?,")                 // odometer or external power
+            .number("d*,")                       // backup battery or lightness
+            .number("(d+.d+),")                  // battery
+            .expression("([01]),")               // charging
+            .number("(?:d),")                    // led
+            .number("(?:d)?,")                   // gps on need
+            .number("(?:d)?,")                   // gps antenna type
+            .number("(?:d)?,").optional()        // gps antenna state
+            .number("d{14},")                    // last fix time
+            .groupBegin()
+            .number("(d+),")                     // battery percentage
+            .number("[d.]*,")                    // flash type / power
+            .number("(-?[d.]+)?,,,")             // temperature
+            .or()
+            .expression("(?:[01])?,").optional() // pin15 mode
+            .number("(d+)?,")                    // adc1
+            .number("(d+)?,").optional()         // adc2
+            .number("(xx)?,")                    // digital input
+            .number("(xx)?,")                    // digital output
+            .number("[-+]dddd,")                 // timezone
+            .expression("[01],")                 // daylight saving
+            .groupEnd()
+            .number("(dddd)(dd)(dd)")            // date (yyyymmdd)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .number("(xxxx)")                    // counter
+            .text("$").optional()
+            .compile();
+
+    private static final Pattern PATTERN_VER = new PatternBuilder()
+            .text("+").expression("(?:RESP|BUFF):GTVER,")
+            .number("[0-9A-Z]{2}xxxx,")          // protocol version
+            .number("(d{15}|x{14}),")            // imei
+            .expression("[^,]*,")                // device name
+            .expression("([^,]*),")              // device type
+            .number("(xxxx),")                   // firmware version
+            .number("(xxxx),")                   // hardware version
+            .number("(dddd)(dd)(dd)")            // date (yyyymmdd)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .number("(xxxx)")                    // counter
+            .text("$").optional()
+            .compile();
+
+    private static final Pattern PATTERN_LOCATION = new PatternBuilder()
+            .number("(d{1,2})?,")                // hdop
+            .number("(d{1,3}.d)?,")              // speed
+            .number("(d{1,3})?,")                // course
+            .number("(-?d{1,5}.d)?,")            // altitude
+            .number("(-?d{1,3}.d{6})?,")         // longitude
+            .number("(-?d{1,2}.d{6})?,")         // latitude
+            .number("(dddd)(dd)(dd)")            // date (yyyymmdd)
+            .number("(dd)(dd)(dd)").optional(2)  // time (hhmmss)
+            .text(",")
+            .number("(d+)?,")                    // mcc
+            .number("(d+)?,")                    // mnc
+            .groupBegin()
+            .number("(d+),")                     // lac
+            .number("(d+),")                     // cid
+            .or()
+            .number("(x+)?,")                    // lac
+            .number("(x+)?,")                    // cid
+            .groupEnd()
+            .number("(?:d+|(d+.d))?,")           // odometer
+            .compile();
+
+    private static final Pattern PATTERN_OBD = new PatternBuilder()
+            .text("+RESP:GTOBD,")
+            .number("[0-9A-Z]{2}xxxx,")          // protocol version
+            .number("(d{15}|x{14}),")            // imei
+            .expression("(?:[0-9A-Z]{17})?,")    // vin
+            .expression("[^,]{0,20},")           // device name
+            .expression("[01],")                 // report type
+            .number("x{1,8},")                   // report mask
+            .expression("(?:[0-9A-Z]{17})?,")    // vin
+            .number("[01],")                     // obd connect
+            .number("(?:d{1,5})?,")              // obd voltage
+            .number("(?:x{8})?,")                // support pids
+            .number("(d{1,5})?,")                // engine rpm
+            .number("(d{1,3})?,")                // speed
+            .number("(-?d{1,3})?,")              // coolant temp
+            .number("(d+.?d*|Inf|NaN)?,")        // fuel consumption
+            .number("(d{1,5})?,")                // dtcs cleared distance
+            .number("(?:d{1,5})?,")
+            .expression("([01])?,")              // obd connect
+            .number("(d{1,3})?,")                // number of dtcs
+            .number("(x*),")                     // dtcs
+            .number("(d{1,3})?,")                // throttle
+            .number("(?:d{1,3})?,")              // engine load
+            .number("(d{1,3})?,")                // fuel level
+            .expression("(?:[0-9A],)?")          // obd protocol
+            .number("(d+),")                     // odometer
+            .expression(PATTERN_LOCATION.pattern())
+            .number("(d{1,7}.d)?,")              // odometer
+            .number("(dddd)(dd)(dd)")            // date (yyyymmdd)
+            .number("(dd)(dd)(dd)").optional(2)  // time (hhmmss)
+            .text(",")
+            .number("(xxxx)")                    // count number
+            .text("$").optional()
+            .compile();
+
+    private static final Pattern PATTERN_FRI = new PatternBuilder()
+            .text("+").expression("(?:RESP|BUFF):GT...,")
+            .number("(?:[0-9A-Z]{2}xxxx)?,")     // protocol version
+            .number("(d{15}|x{14}),")            // imei
+            .expression("(?:([0-9A-Z]{17}),)?")  // vin
+            .expression("[^,]*,")                // device name
+            .number("(d+)?,")                    // power
+            .number("d{1,2},").optional()        // report type
+            .number("d{1,2},").optional()        // count
+            .number(",").optional()              // reserved
+            .number("(d+),").optional()          // battery
+            .expression("((?:")
+            .expression(PATTERN_LOCATION.pattern())
+            .expression(")+)")
+            .groupBegin()
+            .number("(d{1,7}.d)?,")              // odometer
+            .number("(d{5}:dd:dd)?,")            // hour meter
+            .number("(x+)?,")                    // adc 1
+            .number("(x+)?,")                    // adc 2
+            .number("(d{1,3})?,")                // battery
+            .number("(?:(xx)(xx)(xx))?,")        // device status
+            .number("(d+)?,")                    // rpm
+            .number("(?:d+.?d*|Inf|NaN)?,")      // fuel consumption
+            .number("(d+)?,")                    // fuel level
+            .or()
+            .number("(d{1,7}.d)?,").optional()   // odometer
+            .number("(d{1,3})?,")                // battery
+            .groupEnd()
+            .any()
+            .number("(dddd)(dd)(dd)")            // date (yyyymmdd)
+            .number("(dd)(dd)(dd)").optional(2)  // time (hhmmss)
+            .text(",")
+            .number("(xxxx)")                    // count number
+            .text("$").optional()
+            .compile();
+
+    private static final Pattern PATTERN_ERI = new PatternBuilder()
+            .text("+").expression("(?:RESP|BUFF):GTERI,")
+            .number("(?:[0-9A-Z]{2}xxxx)?,")     // protocol version
+            .number("(d{15}|x{14}),")            // imei
+            .expression("[^,]*,")                // device name
+            .number("(x{8}),")                   // mask
+            .number("(d+)?,")                    // power
+            .number("d{1,2},")                   // report type
+            .number("d{1,2},")                   // count
+            .expression("((?:")
+            .expression(PATTERN_LOCATION.pattern())
+            .expression(")+)")
+            .number("(d{1,7}.d)?,")              // odometer
+            .number("(d{5}:dd:dd)?,")            // hour meter
+            .number("(x+)?,")                    // adc 1
+            .number("(x+)?,").optional()         // adc 2
+            .number("(d{1,3})?,")                // battery
+            .number("(?:(xx)(xx)(xx))?,")        // device status
+            .expression("(.*)")                  // additional data
+            .number("(dddd)(dd)(dd)")            // date (yyyymmdd)
+            .number("(dd)(dd)(dd)").optional(2)  // time (hhmmss)
+            .text(",")
+            .number("(xxxx)")                    // count number
+            .text("$").optional()
+            .compile();
+
+    private static final Pattern PATTERN_IGN = new PatternBuilder()
+            .text("+").expression("(?:RESP|BUFF):GTIG[NF],")
+            .number("(?:[0-9A-Z]{2}xxxx)?,")     // protocol version
+            .number("(d{15}|x{14}),")            // imei
+            .expression("[^,]*,")                // device name
+            .number("d+,")                       // ignition off duration
+            .expression(PATTERN_LOCATION.pattern())
+            .number("(d{5}:dd:dd)?,")            // hour meter
+            .number("(d{1,7}.d)?,")              // odometer
+            .number("(dddd)(dd)(dd)")            // date (yyyymmdd)
+            .number("(dd)(dd)(dd)").optional(2)  // time (hhmmss)
+            .text(",")
+            .number("(xxxx)")                    // count number
+            .text("$").optional()
+            .compile();
+
+    private static final Pattern PATTERN_LSW = new PatternBuilder()
+            .text("+RESP:").expression("GT[LT]SW,")
+            .number("(?:[0-9A-Z]{2}xxxx)?,")     // protocol version
+            .number("(d{15}|x{14}),")            // imei
+            .expression("[^,]*,")                // device name
+            .number("[01],")                     // type
+            .number("([01]),")                   // state
+            .expression(PATTERN_LOCATION.pattern())
+            .number("(dddd)(dd)(dd)")            // date (yyyymmdd)
+            .number("(dd)(dd)(dd)").optional(2)  // time (hhmmss)
+            .text(",")
+            .number("(xxxx)")                    // count number
+            .text("$").optional()
+            .compile();
+
+    private static final Pattern PATTERN_IDA = new PatternBuilder()
+            .text("+RESP:GTIDA,")
+            .number("(?:[0-9A-Z]{2}xxxx)?,")     // protocol version
+            .number("(d{15}|x{14}),")            // imei
+            .expression("[^,]*,,")               // device name
+            .number("([^,]+),")                  // rfid
+            .expression("[01],")                 // report type
+            .number("1,")                        // count
+            .expression(PATTERN_LOCATION.pattern())
+            .number("(d+.d),")                   // odometer
+            .text(",,,,")
+            .number("(dddd)(dd)(dd)")            // date (yyyymmdd)
+            .number("(dd)(dd)(dd)").optional(2)  // time (hhmmss)
+            .text(",")
+            .number("(xxxx)")                    // count number
+            .text("$").optional()
+            .compile();
+
+    private static final Pattern PATTERN_WIF = new PatternBuilder()
+            .text("+RESP:GTWIF,")
+            .number("(?:[0-9A-Z]{2}xxxx)?,")     // protocol version
+            .number("(d{15}|x{14}),")            // imei
+            .expression("[^,]*,")                // device name
+            .number("(d+),")                     // count
+            .number("((?:x{12},-?d+,,,,)+),,,,") // wifi
+            .number("(d{1,3}),")                 // battery
+            .number("(dddd)(dd)(dd)")            // date (yyyymmdd)
+            .number("(dd)(dd)(dd)").optional(2)  // time (hhmmss)
+            .text(",")
+            .number("(xxxx)")                    // count number
+            .text("$").optional()
+            .compile();
+
+    private static final Pattern PATTERN_GSM = new PatternBuilder()
+            .text("+RESP:GTGSM,")
+            .number("(?:[0-9A-Z]{2}xxxx)?,")     // protocol version
+            .number("(d{15}|x{14}),")            // imei
+            .expression("(?:STR|CTN|NMR|RTL),")  // fix type
+            .expression("(.*)")                  // cells
+            .number("(dddd)(dd)(dd)")            // date (yyyymmdd)
+            .number("(dd)(dd)(dd)").optional(2)  // time (hhmmss)
+            .text(",")
+            .number("(xxxx)")                    // count number
+            .text("$").optional()
+            .compile();
+
+    private static final Pattern PATTERN_PNA = new PatternBuilder()
+            .text("+RESP:GT").expression("P[NF]A,")
+            .number("(?:[0-9A-Z]{2}xxxx)?,")     // protocol version
+            .number("(d{15}|x{14}),")            // imei
+            .expression("[^,]*,")                // device name
+            .number("(dddd)(dd)(dd)")            // date (yyyymmdd)
+            .number("(dd)(dd)(dd)").optional(2)  // time (hhmmss)
+            .text(",")
+            .number("(xxxx)")                    // count number
+            .text("$").optional()
+            .compile();
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("+").expression("(?:RESP|BUFF):GT...,")
+            .number("(?:[0-9A-Z]{2}xxxx)?,")     // protocol version
+            .number("(d{15}|x{14}),")            // imei
+            .expression("[^,]*,")                // device name
+            .number("d*,")
+            .number("(x{1,2}),")                 // report type
+            .number("d{1,2},")                   // count
+            .expression(PATTERN_LOCATION.pattern())
+            .groupBegin()
+            .number("(d{1,7}.d)?,").optional()   // odometer
+            .number("(d{1,3})?,")                // battery
+            .or()
+            .number("(d{1,7}.d)?,")              // odometer
+            .groupEnd()
+            .number("(dddd)(dd)(dd)")            // date (yyyymmdd)
+            .number("(dd)(dd)(dd)")  // time (hhmmss)
+            .text(",")
+            .number("(xxxx)")                    // count number
+            .text("$").optional()
+            .compile();
+
+    private static final Pattern PATTERN_BASIC = new PatternBuilder()
+            .text("+").expression("(?:RESP|BUFF)").text(":")
+            .expression("GT...,")
+            .number("(?:[0-9A-Z]{2}xxxx)?,").optional() // protocol version
+            .number("(d{15}|x{14}),")            // imei
+            .any()
+            .number("(d{1,2})?,")                // hdop
+            .number("(d{1,3}.d)?,")              // speed
+            .number("(d{1,3})?,")                // course
+            .number("(-?d{1,5}.d)?,")            // altitude
+            .number("(-?d{1,3}.d{6})?,")         // longitude
+            .number("(-?d{1,2}.d{6})?,")         // latitude
+            .number("(dddd)(dd)(dd)")            // date (yyyymmdd)
+            .number("(dd)(dd)(dd)").optional(2)  // time (hhmmss)
+            .text(",")
+            .number("(d+),")                     // mcc
+            .number("(d+),")                     // mnc
+            .number("(x+),")                     // lac
+            .number("(x+),").optional(4)         // cell
+            .any()
+            .number("(dddd)(dd)(dd)")            // date (yyyymmdd)
+            .number("(dd)(dd)(dd)").optional(2)  // time (hhmmss)
+            .text(",")
+            .number("(xxxx)")                    // count number
+            .text("$").optional()
+            .compile();
+
+    private Object decodeAck(Channel channel, SocketAddress remoteAddress, String sentence, String type) {
+        Parser parser = new Parser(PATTERN_ACK, sentence);
+        if (parser.matches()) {
+            String protocolVersion = parser.next();
+            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+            if (deviceSession == null) {
+                return null;
+            }
+            if (type.equals("HBD")) {
+                if (channel != null) {
+                    parser.skip(6);
+                    channel.writeAndFlush(new NetworkMessage(
+                            "+SACK:GTHBD," + protocolVersion + "," + parser.next() + "$", remoteAddress));
+                }
+            } else {
+                Position position = new Position(getProtocolName());
+                position.setDeviceId(deviceSession.getDeviceId());
+                getLastLocation(position, parser.nextDateTime());
+                position.setValid(false);
+                position.set(Position.KEY_RESULT, "Command " + type + " accepted");
+                return position;
+            }
+        }
+        return null;
+    }
+
+    private Position initPosition(Parser parser, Channel channel, SocketAddress remoteAddress) {
+        if (parser.matches()) {
+            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+            if (deviceSession != null) {
+                Position position = new Position(getProtocolName());
+                position.setDeviceId(deviceSession.getDeviceId());
+                return position;
+            }
+        }
+        return null;
+    }
+
+    private void decodeDeviceTime(Position position, Parser parser) {
+        if (parser.hasNext(6)) {
+            if (ignoreFixTime) {
+                position.setTime(parser.nextDateTime());
+            } else {
+                position.setDeviceTime(parser.nextDateTime());
+            }
+        }
+    }
+
+    private Long parseHours(String hoursString) {
+        if (hoursString != null) {
+            String[] hours = hoursString.split(":");
+            return (long) (Integer.parseInt(hours[0]) * 3600
+                    + (hours.length > 1 ? Integer.parseInt(hours[1]) * 60 : 0)
+                    + (hours.length > 2 ? Integer.parseInt(hours[2]) : 0)) * 1000;
+        }
+        return null;
+    }
+
+    private Object decodeInf(Channel channel, SocketAddress remoteAddress, String sentence) {
+        Parser parser = new Parser(PATTERN_INF, sentence);
+        Position position = initPosition(parser, channel, remoteAddress);
+        if (position == null) {
+            return null;
+        }
+
+        switch (parser.nextHexInt()) {
+            case 0x16:
+            case 0x1A:
+            case 0x12:
+                position.set(Position.KEY_IGNITION, false);
+                position.set(Position.KEY_MOTION, true);
+                break;
+            case 0x11:
+                position.set(Position.KEY_IGNITION, false);
+                position.set(Position.KEY_MOTION, false);
+                break;
+            case 0x21:
+                position.set(Position.KEY_IGNITION, true);
+                position.set(Position.KEY_MOTION, false);
+                break;
+            case 0x22:
+                position.set(Position.KEY_IGNITION, true);
+                position.set(Position.KEY_MOTION, true);
+                break;
+            case 0x41:
+                position.set(Position.KEY_MOTION, false);
+                break;
+            case 0x42:
+                position.set(Position.KEY_MOTION, true);
+                break;
+            default:
+                break;
+        }
+
+        position.set(Position.KEY_RSSI, parser.nextInt());
+
+        parser.next(); // odometer or external power
+
+        position.set(Position.KEY_BATTERY, parser.nextDouble());
+        position.set(Position.KEY_CHARGE, parser.nextInt() == 1);
+
+        position.set(Position.KEY_BATTERY_LEVEL, parser.nextInt());
+
+        position.set(Position.PREFIX_TEMP + 1, parser.next());
+
+        position.set(Position.PREFIX_ADC + 1, parser.next());
+        position.set(Position.PREFIX_ADC + 2, parser.next());
+
+        position.set(Position.KEY_INPUT, parser.next());
+        position.set(Position.KEY_OUTPUT, parser.next());
+
+        getLastLocation(position, parser.nextDateTime());
+
+        position.set(Position.KEY_INDEX, parser.nextHexInt());
+
+        return position;
+    }
+
+    private Object decodeVer(Channel channel, SocketAddress remoteAddress, String sentence) {
+        Parser parser = new Parser(PATTERN_VER, sentence);
+        Position position = initPosition(parser, channel, remoteAddress);
+        if (position == null) {
+            return null;
+        }
+
+        position.set("deviceType", parser.next());
+        position.set(Position.KEY_VERSION_FW, parser.nextHexInt());
+        position.set(Position.KEY_VERSION_HW, parser.nextHexInt());
+
+        getLastLocation(position, parser.nextDateTime());
+
+        return position;
+    }
+
+    private void skipLocation(Parser parser) {
+        parser.skip(19);
+    }
+
+    private void decodeLocation(Position position, Parser parser) {
+        Integer hdop = parser.nextInt();
+        position.setValid(hdop == null || hdop > 0);
+        position.set(Position.KEY_HDOP, hdop);
+
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
+        position.setCourse(parser.nextDouble(0));
+        position.setAltitude(parser.nextDouble(0));
+
+        if (parser.hasNext(8)) {
+            position.setValid(true);
+            position.setLongitude(parser.nextDouble());
+            position.setLatitude(parser.nextDouble());
+            position.setTime(parser.nextDateTime());
+        } else {
+            getLastLocation(position, null);
+        }
+
+        if (parser.hasNext(6)) {
+            int mcc = parser.nextInt();
+            int mnc = parser.nextInt();
+            if (parser.hasNext(2)) {
+                position.setNetwork(new Network(CellTower.from(mcc, mnc, parser.nextInt(), parser.nextInt())));
+            }
+            if (parser.hasNext(2)) {
+                position.setNetwork(new Network(CellTower.from(mcc, mnc, parser.nextHexInt(), parser.nextHexInt())));
+            }
+        }
+
+        if (parser.hasNext()) {
+            position.set(Position.KEY_ODOMETER, parser.nextDouble() * 1000);
+        }
+    }
+
+    private Object decodeObd(Channel channel, SocketAddress remoteAddress, String sentence) {
+        Parser parser = new Parser(PATTERN_OBD, sentence);
+        Position position = initPosition(parser, channel, remoteAddress);
+        if (position == null) {
+            return null;
+        }
+
+        position.set(Position.KEY_RPM, parser.nextInt());
+        position.set(Position.KEY_OBD_SPEED, parser.nextInt());
+        position.set(Position.PREFIX_TEMP + 1, parser.nextInt());
+        position.set(Position.KEY_FUEL_CONSUMPTION, parser.next());
+        position.set("dtcsClearedDistance", parser.nextInt());
+        if (parser.hasNext()) {
+            position.set("odbConnect", parser.nextInt() == 1);
+        }
+        position.set("dtcsNumber", parser.nextInt());
+        position.set("dtcsCodes", parser.next());
+        position.set(Position.KEY_THROTTLE, parser.nextInt());
+        position.set(Position.KEY_FUEL_LEVEL, parser.nextInt());
+        if (parser.hasNext()) {
+            position.set(Position.KEY_OBD_ODOMETER, parser.nextInt() * 1000);
+        }
+
+        decodeLocation(position, parser);
+
+        if (parser.hasNext()) {
+            position.set(Position.KEY_OBD_ODOMETER, (int) (parser.nextDouble() * 1000));
+        }
+
+        decodeDeviceTime(position, parser);
+
+        return position;
+    }
+
+    private Object decodeCan(Channel channel, SocketAddress remoteAddress, String sentence) throws ParseException {
+        Position position = new Position(getProtocolName());
+
+        int index = 0;
+        String[] values = sentence.split(",");
+
+        index += 1; // header
+        index += 1; // protocol version
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, values[index++]);
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        index += 1; // device name
+        index += 1; // report type
+        index += 1; // canbus state
+        long reportMask = Long.parseLong(values[index++], 16);
+        long reportMaskExt = 0;
+
+        if (BitUtil.check(reportMask, 0)) {
+            position.set(Position.KEY_VIN, values[index++]);
+        }
+        if (BitUtil.check(reportMask, 1)) {
+            position.set(Position.KEY_IGNITION, Integer.parseInt(values[index++]) > 0);
+        }
+        if (BitUtil.check(reportMask, 2)) {
+            position.set(Position.KEY_OBD_ODOMETER, values[index++]);
+        }
+        if (BitUtil.check(reportMask, 3) && !values[index++].isEmpty()) {
+            position.set(Position.KEY_FUEL_USED, Double.parseDouble(values[index - 1]));
+        }
+        if (BitUtil.check(reportMask, 5) && !values[index++].isEmpty()) {
+            position.set(Position.KEY_RPM, Integer.parseInt(values[index - 1]));
+        }
+        if (BitUtil.check(reportMask, 4) && !values[index++].isEmpty()) {
+            position.set(Position.KEY_OBD_SPEED, UnitsConverter.knotsFromKph(Integer.parseInt(values[index - 1])));
+        }
+        if (BitUtil.check(reportMask, 6) && !values[index++].isEmpty()) {
+            position.set(Position.KEY_COOLANT_TEMP, Integer.parseInt(values[index - 1]));
+        }
+        if (BitUtil.check(reportMask, 7) && !values[index++].isEmpty()) {
+            position.set(Position.KEY_FUEL_CONSUMPTION, Double.parseDouble(values[index - 1].substring(1)));
+        }
+        if (BitUtil.check(reportMask, 8) && !values[index++].isEmpty()) {
+            position.set(Position.KEY_FUEL_LEVEL, Double.parseDouble(values[index - 1].substring(1)));
+        }
+        if (BitUtil.check(reportMask, 9) && !values[index++].isEmpty()) {
+            position.set("range", Long.parseLong(values[index - 1]) * 100);
+        }
+        if (BitUtil.check(reportMask, 10) && !values[index++].isEmpty()) {
+            position.set(Position.KEY_THROTTLE, Integer.parseInt(values[index - 1]));
+        }
+        if (BitUtil.check(reportMask, 11) && !values[index++].isEmpty()) {
+            position.set(Position.KEY_HOURS, UnitsConverter.msFromHours(Double.parseDouble(values[index - 1])));
+        }
+        if (BitUtil.check(reportMask, 12)) {
+            position.set("drivingHours", Double.parseDouble(values[index++]));
+        }
+        if (BitUtil.check(reportMask, 13)) {
+            position.set("idleHours", Double.parseDouble(values[index++]));
+        }
+        if (BitUtil.check(reportMask, 14) && !values[index++].isEmpty()) {
+            position.set("idleFuelConsumption", Double.parseDouble(values[index - 1]));
+        }
+        if (BitUtil.check(reportMask, 15) && !values[index++].isEmpty()) {
+            position.set(Position.KEY_AXLE_WEIGHT, Integer.parseInt(values[index - 1]));
+        }
+        if (BitUtil.check(reportMask, 16) && !values[index++].isEmpty()) {
+            position.set("tachographInfo", Integer.parseInt(values[index - 1]));
+        }
+        if (BitUtil.check(reportMask, 17) && !values[index++].isEmpty()) {
+            position.set("indicators", Integer.parseInt(values[index - 1]));
+        }
+        if (BitUtil.check(reportMask, 18) && !values[index++].isEmpty()) {
+            position.set("lights", Integer.parseInt(values[index - 1]));
+        }
+        if (BitUtil.check(reportMask, 19) && !values[index++].isEmpty()) {
+            position.set("doors", Integer.parseInt(values[index - 1]));
+        }
+        if (BitUtil.check(reportMask, 20) && !values[index++].isEmpty()) {
+            position.set("vehicleOverspeed", Double.parseDouble(values[index - 1]));
+        }
+        if (BitUtil.check(reportMask, 21) && !values[index++].isEmpty()) {
+            position.set("engineOverspeed", Double.parseDouble(values[index - 1]));
+        }
+        if (BitUtil.check(reportMask, 29)) {
+            reportMaskExt = Long.parseLong(values[index++], 16);
+        }
+        if (BitUtil.check(reportMaskExt, 0) && !values[index++].isEmpty()) {
+            position.set("adBlueLevel", Integer.parseInt(values[index - 1]));
+        }
+        if (BitUtil.check(reportMaskExt, 1) && !values[index++].isEmpty()) {
+            position.set("axleWeight1", Integer.parseInt(values[index - 1]));
+        }
+        if (BitUtil.check(reportMaskExt, 2) && !values[index++].isEmpty()) {
+            position.set("axleWeight3", Integer.parseInt(values[index - 1]));
+        }
+        if (BitUtil.check(reportMaskExt, 3) && !values[index++].isEmpty()) {
+            position.set("axleWeight4", Integer.parseInt(values[index - 1]));
+        }
+        if (BitUtil.check(reportMaskExt, 4)) {
+            index += 1; // tachograph overspeed
+        }
+        if (BitUtil.check(reportMaskExt, 5)) {
+            index += 1; // tachograph motion
+        }
+        if (BitUtil.check(reportMaskExt, 6)) {
+            index += 1; // tachograph direction
+        }
+        if (BitUtil.check(reportMaskExt, 7) && !values[index++].isEmpty()) {
+            position.set(Position.PREFIX_ADC + 1, Integer.parseInt(values[index - 1]) * 0.001);
+        }
+        if (BitUtil.check(reportMaskExt, 8)) {
+            index += 1; // pedal breaking factor
+        }
+        if (BitUtil.check(reportMaskExt, 9)) {
+            index += 1; // engine breaking factor
+        }
+        if (BitUtil.check(reportMaskExt, 10)) {
+            index += 1; // total accelerator kick-downs
+        }
+        if (BitUtil.check(reportMaskExt, 11)) {
+            index += 1; // total effective engine speed
+        }
+        if (BitUtil.check(reportMaskExt, 12)) {
+            index += 1; // total cruise control time
+        }
+        if (BitUtil.check(reportMaskExt, 13)) {
+            index += 1; // total accelerator kick-down time
+        }
+        if (BitUtil.check(reportMaskExt, 14)) {
+            index += 1; // total brake application
+        }
+        if (BitUtil.check(reportMaskExt, 15) && !values[index++].isEmpty()) {
+            position.set("driver1Card", values[index - 1]);
+        }
+        if (BitUtil.check(reportMaskExt, 16) && !values[index++].isEmpty()) {
+            position.set("driver2Card", values[index - 1]);
+        }
+        if (BitUtil.check(reportMaskExt, 17) && !values[index++].isEmpty()) {
+            position.set("driver1Name", values[index - 1]);
+        }
+        if (BitUtil.check(reportMaskExt, 18) && !values[index++].isEmpty()) {
+            position.set("driver2Name", values[index - 1]);
+        }
+        if (BitUtil.check(reportMaskExt, 19) && !values[index++].isEmpty()) {
+            position.set("registration", values[index - 1]);
+        }
+        if (BitUtil.check(reportMaskExt, 20)) {
+            index += 1; // expansion information
+        }
+        if (BitUtil.check(reportMaskExt, 21)) {
+            index += 1; // rapid brakings
+        }
+        if (BitUtil.check(reportMaskExt, 22)) {
+            index += 1; // rapid accelerations
+        }
+        if (BitUtil.check(reportMaskExt, 23)) {
+            index += 1; // engine torque
+        }
+
+        DateFormat dateFormat = new SimpleDateFormat("yyyyMMddHHmmss");
+        dateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
+
+        if (BitUtil.check(reportMask, 30)) {
+            while (values[index].isEmpty()) {
+                index += 1;
+            }
+            position.setValid(Integer.parseInt(values[index++]) > 0);
+            if (!values[index].isEmpty()) {
+                position.setSpeed(UnitsConverter.knotsFromKph(Double.parseDouble(values[index++])));
+                position.setCourse(Integer.parseInt(values[index++]));
+                position.setAltitude(Double.parseDouble(values[index++]));
+                position.setLongitude(Double.parseDouble(values[index++]));
+                position.setLatitude(Double.parseDouble(values[index++]));
+                position.setTime(dateFormat.parse(values[index++]));
+            } else {
+                index += 6; // no location
+                getLastLocation(position, null);
+            }
+        } else {
+            getLastLocation(position, null);
+        }
+
+        if (BitUtil.check(reportMask, 31)) {
+            index += 4; // cell
+            index += 1; // reserved
+        }
+
+        if (ignoreFixTime) {
+            position.setTime(dateFormat.parse(values[index]));
+        } else {
+            position.setDeviceTime(dateFormat.parse(values[index]));
+        }
+
+        return position;
+    }
+
+    private void decodeStatus(Position position, Parser parser) {
+        if (parser.hasNext(3)) {
+            int ignition = parser.nextHexInt();
+            if (BitUtil.check(ignition, 4)) {
+                position.set(Position.KEY_IGNITION, false);
+            } else if (BitUtil.check(ignition, 5)) {
+                position.set(Position.KEY_IGNITION, true);
+            }
+            position.set(Position.KEY_INPUT, parser.nextHexInt());
+            position.set(Position.KEY_OUTPUT, parser.nextHexInt());
+        }
+    }
+
+    private Object decodeFri(Channel channel, SocketAddress remoteAddress, String sentence) {
+        Parser parser = new Parser(PATTERN_FRI, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        LinkedList<Position> positions = new LinkedList<>();
+
+        String vin = parser.next();
+        Integer power = parser.nextInt();
+        Integer battery = parser.nextInt();
+
+        Parser itemParser = new Parser(PATTERN_LOCATION, parser.next());
+        while (itemParser.find()) {
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            position.set(Position.KEY_VIN, vin);
+
+            decodeLocation(position, itemParser);
+
+            positions.add(position);
+        }
+
+        Position position = positions.getLast();
+
+        skipLocation(parser);
+
+        if (power != null && power > 10) {
+            position.set(Position.KEY_POWER, power * 0.001); // only on some devices
+        }
+        if (battery != null) {
+            position.set(Position.KEY_BATTERY_LEVEL, battery);
+        }
+
+        if (parser.hasNext()) {
+            position.set(Position.KEY_ODOMETER, parser.nextDouble() * 1000);
+        }
+        position.set(Position.KEY_HOURS, parseHours(parser.next()));
+        position.set(Position.PREFIX_ADC + 1, parser.next());
+        position.set(Position.PREFIX_ADC + 2, parser.next());
+        position.set(Position.KEY_BATTERY_LEVEL, parser.nextInt());
+
+        decodeStatus(position, parser);
+
+        position.set(Position.KEY_RPM, parser.nextInt());
+        position.set(Position.KEY_FUEL_LEVEL, parser.nextInt());
+
+        if (parser.hasNext()) {
+            position.set(Position.KEY_ODOMETER, parser.nextDouble() * 1000);
+        }
+        position.set(Position.KEY_BATTERY_LEVEL, parser.nextInt());
+
+        decodeDeviceTime(position, parser);
+        if (ignoreFixTime) {
+            positions.clear();
+            positions.add(position);
+        }
+
+        return positions;
+    }
+
+    private Object decodeEri(Channel channel, SocketAddress remoteAddress, String sentence) {
+        Parser parser = new Parser(PATTERN_ERI, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        long mask = parser.nextHexLong();
+
+        LinkedList<Position> positions = new LinkedList<>();
+
+        Integer power = parser.nextInt();
+
+        Parser itemParser = new Parser(PATTERN_LOCATION, parser.next());
+        while (itemParser.find()) {
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            decodeLocation(position, itemParser);
+
+            positions.add(position);
+        }
+
+        Position position = positions.getLast();
+
+        skipLocation(parser);
+
+        if (power != null) {
+            position.set(Position.KEY_POWER, power * 0.001);
+        }
+        position.set(Position.KEY_ODOMETER, parser.nextDouble() * 1000);
+        position.set(Position.KEY_HOURS, parseHours(parser.next()));
+        position.set(Position.PREFIX_ADC + 1, parser.next());
+        position.set(Position.PREFIX_ADC + 2, parser.next());
+        position.set(Position.KEY_BATTERY_LEVEL, parser.nextInt());
+
+        decodeStatus(position, parser);
+
+        int index = 0;
+        String[] data = parser.next().split(",");
+
+        index += 1; // device type
+
+        if (BitUtil.check(mask, 0)) {
+            index += 1; // digital fuel sensor data
+        }
+
+        if (BitUtil.check(mask, 1)) {
+            int deviceCount = Integer.parseInt(data[index++]);
+            for (int i = 1; i <= deviceCount; i++) {
+                index += 1; // id
+                index += 1; // type
+                if (!data[index++].isEmpty()) {
+                    position.set(Position.PREFIX_TEMP + i, (short) Integer.parseInt(data[index - 1], 16) * 0.0625);
+                }
+            }
+        }
+
+        if (BitUtil.check(mask, 2)) {
+            index += 1; // can data
+        }
+
+        if (BitUtil.check(mask, 3) || BitUtil.check(mask, 4)) {
+            int deviceCount = Integer.parseInt(data[index++]);
+            for (int i = 1; i <= deviceCount; i++) {
+                index += 1; // type
+                if (BitUtil.check(mask, 3)) {
+                    position.set(Position.KEY_FUEL_LEVEL, Double.parseDouble(data[index++]));
+                }
+                if (BitUtil.check(mask, 4)) {
+                    index += 1; // volume
+                }
+            }
+        }
+
+        decodeDeviceTime(position, parser);
+        if (ignoreFixTime) {
+            positions.clear();
+            positions.add(position);
+        }
+
+        return positions;
+    }
+
+    private Object decodeIgn(Channel channel, SocketAddress remoteAddress, String sentence) {
+        Parser parser = new Parser(PATTERN_IGN, sentence);
+        Position position = initPosition(parser, channel, remoteAddress);
+        if (position == null) {
+            return null;
+        }
+
+        decodeLocation(position, parser);
+
+        position.set(Position.KEY_IGNITION, sentence.contains("IGN"));
+        position.set(Position.KEY_HOURS, parseHours(parser.next()));
+        position.set(Position.KEY_ODOMETER, parser.nextDouble() * 1000);
+
+        decodeDeviceTime(position, parser);
+
+        return position;
+    }
+
+    private Object decodeLsw(Channel channel, SocketAddress remoteAddress, String sentence) {
+        Parser parser = new Parser(PATTERN_LSW, sentence);
+        Position position = initPosition(parser, channel, remoteAddress);
+        if (position == null) {
+            return null;
+        }
+
+        position.set(Position.PREFIX_IN + (sentence.contains("LSW") ? 1 : 2), parser.nextInt() == 1);
+
+        decodeLocation(position, parser);
+
+        decodeDeviceTime(position, parser);
+
+        return position;
+    }
+
+    private Object decodeIda(Channel channel, SocketAddress remoteAddress, String sentence) {
+        Parser parser = new Parser(PATTERN_IDA, sentence);
+        Position position = initPosition(parser, channel, remoteAddress);
+        if (position == null) {
+            return null;
+        }
+
+        position.set(Position.KEY_DRIVER_UNIQUE_ID, parser.next());
+
+        decodeLocation(position, parser);
+
+        position.set(Position.KEY_ODOMETER, parser.nextDouble() * 1000);
+
+        decodeDeviceTime(position, parser);
+
+        return position;
+    }
+
+    private Object decodeWif(Channel channel, SocketAddress remoteAddress, String sentence) {
+        Parser parser = new Parser(PATTERN_WIF, sentence);
+        Position position = initPosition(parser, channel, remoteAddress);
+        if (position == null) {
+            return null;
+        }
+
+        getLastLocation(position, null);
+
+        Network network = new Network();
+
+        parser.nextInt(); // count
+        Matcher matcher = Pattern.compile("([0-9a-fA-F]{12}),(-?\\d+),,,,").matcher(parser.next());
+        while (matcher.find()) {
+            String mac = matcher.group(1).replaceAll("(..)", "$1:");
+            network.addWifiAccessPoint(WifiAccessPoint.from(
+                    mac.substring(0, mac.length() - 1), Integer.parseInt(matcher.group(2))));
+        }
+
+        position.setNetwork(network);
+
+        position.set(Position.KEY_BATTERY_LEVEL, parser.nextInt());
+
+        return position;
+    }
+
+    private Object decodeGsm(Channel channel, SocketAddress remoteAddress, String sentence) {
+        Parser parser = new Parser(PATTERN_GSM, sentence);
+        Position position = initPosition(parser, channel, remoteAddress);
+        if (position == null) {
+            return null;
+        }
+
+        getLastLocation(position, null);
+
+        Network network = new Network();
+
+        String[] data = parser.next().split(",");
+        for (int i = 0; i < 6; i++) {
+            if (!data[i * 6].isEmpty()) {
+                network.addCellTower(CellTower.from(
+                        Integer.parseInt(data[i * 6]), Integer.parseInt(data[i * 6 + 1]),
+                        Integer.parseInt(data[i * 6 + 2], 16), Integer.parseInt(data[i * 6 + 3], 16),
+                        Integer.parseInt(data[i * 6 + 4])));
+            }
+        }
+
+        position.setNetwork(network);
+
+        return position;
+    }
+
+    private Object decodePna(Channel channel, SocketAddress remoteAddress, String sentence) {
+        Parser parser = new Parser(PATTERN_PNA, sentence);
+        Position position = initPosition(parser, channel, remoteAddress);
+        if (position == null) {
+            return null;
+        }
+
+        getLastLocation(position, null);
+
+        position.set(Position.KEY_ALARM, sentence.contains("PNA") ? Position.ALARM_POWER_ON : Position.ALARM_POWER_OFF);
+
+        return position;
+    }
+
+    private Object decodeOther(Channel channel, SocketAddress remoteAddress, String sentence, String type) {
+        Parser parser = new Parser(PATTERN, sentence);
+        Position position = initPosition(parser, channel, remoteAddress);
+        if (position == null) {
+            return null;
+        }
+
+        int reportType = parser.nextHexInt();
+        if (type.equals("NMR")) {
+            position.set(Position.KEY_MOTION, reportType == 1);
+        } else if (type.equals("SOS")) {
+            position.set(Position.KEY_ALARM, Position.ALARM_SOS);
+        } else if (type.equals("DIS")) {
+            position.set(Position.PREFIX_IN + reportType / 0x10, reportType % 0x10 == 1);
+        } else if (type.equals("IGL")) {
+            position.set(Position.KEY_IGNITION, reportType % 0x10 == 1);
+        }
+
+        decodeLocation(position, parser);
+
+        if (parser.hasNext()) {
+            position.set(Position.KEY_ODOMETER, parser.nextDouble() * 1000);
+        }
+        position.set(Position.KEY_BATTERY_LEVEL, parser.nextInt());
+
+        if (parser.hasNext()) {
+            position.set(Position.KEY_ODOMETER, parser.nextDouble() * 1000);
+        }
+
+        decodeDeviceTime(position, parser);
+
+        if (Context.getConfig().getBoolean(getProtocolName() + ".ack") && channel != null) {
+            channel.writeAndFlush(new NetworkMessage("+SACK:" + parser.next() + "$", remoteAddress));
+        }
+
+        return position;
+    }
+
+    private Object decodeBasic(Channel channel, SocketAddress remoteAddress, String sentence, String type) {
+        Parser parser = new Parser(PATTERN_BASIC, sentence);
+        Position position = initPosition(parser, channel, remoteAddress);
+        if (position == null) {
+            return null;
+        }
+
+        if (parser.hasNext()) {
+            int hdop = parser.nextInt();
+            position.setValid(hdop > 0);
+            position.set(Position.KEY_HDOP, hdop);
+        }
+
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
+        position.setCourse(parser.nextDouble(0));
+        position.setAltitude(parser.nextDouble(0));
+
+        if (parser.hasNext(2)) {
+            position.setLongitude(parser.nextDouble());
+            position.setLatitude(parser.nextDouble());
+        } else {
+            getLastLocation(position, null);
+        }
+
+        if (parser.hasNext(6)) {
+            position.setTime(parser.nextDateTime());
+        }
+
+        if (parser.hasNext(4)) {
+            position.setNetwork(new Network(CellTower.from(
+                    parser.nextInt(), parser.nextInt(), parser.nextHexInt(), parser.nextHexInt())));
+        }
+
+        decodeDeviceTime(position, parser);
+
+        switch (type) {
+            case "TOW":
+                position.set(Position.KEY_ALARM, Position.ALARM_TOW);
+                break;
+            case "IDL":
+                position.set(Position.KEY_ALARM, Position.ALARM_IDLE);
+                break;
+            case "PNA":
+                position.set(Position.KEY_ALARM, Position.ALARM_POWER_ON);
+                break;
+            case "PFA":
+                position.set(Position.KEY_ALARM, Position.ALARM_POWER_OFF);
+                break;
+            case "EPN":
+            case "MPN":
+                position.set(Position.KEY_ALARM, Position.ALARM_POWER_RESTORED);
+                break;
+            case "EPF":
+            case "MPF":
+                position.set(Position.KEY_ALARM, Position.ALARM_POWER_CUT);
+                break;
+            case "BPL":
+                position.set(Position.KEY_ALARM, Position.ALARM_LOW_BATTERY);
+                break;
+            case "STT":
+                position.set(Position.KEY_ALARM, Position.ALARM_MOVEMENT);
+                break;
+            case "SWG":
+                position.set(Position.KEY_ALARM, Position.ALARM_GEOFENCE);
+                break;
+            case "TMP":
+            case "TEM":
+                position.set(Position.KEY_ALARM, Position.ALARM_TEMPERATURE);
+                break;
+            case "JDR":
+            case "JDS":
+                position.set(Position.KEY_ALARM, Position.ALARM_JAMMING);
+                break;
+            default:
+                break;
+        }
+
+        return position;
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        String sentence = ((ByteBuf) msg).toString(StandardCharsets.US_ASCII);
+
+        int typeIndex = sentence.indexOf(":GT");
+        if (typeIndex < 0) {
+            return null;
+        }
+
+        Object result;
+        String type = sentence.substring(typeIndex + 3, typeIndex + 6);
+        if (sentence.startsWith("+ACK")) {
+            result = decodeAck(channel, remoteAddress, sentence, type);
+        } else {
+            switch (type) {
+                case "INF":
+                    result = decodeInf(channel, remoteAddress, sentence);
+                    break;
+                case "OBD":
+                    result = decodeObd(channel, remoteAddress, sentence);
+                    break;
+                case "CAN":
+                    result = decodeCan(channel, remoteAddress, sentence);
+                    break;
+                case "FRI":
+                case "GEO":
+                case "STR":
+                    result = decodeFri(channel, remoteAddress, sentence);
+                    break;
+                case "ERI":
+                    result = decodeEri(channel, remoteAddress, sentence);
+                    break;
+                case "IGN":
+                case "IGF":
+                    result = decodeIgn(channel, remoteAddress, sentence);
+                    break;
+                case "LSW":
+                case "TSW":
+                    result = decodeLsw(channel, remoteAddress, sentence);
+                    break;
+                case "IDA":
+                    result = decodeIda(channel, remoteAddress, sentence);
+                    break;
+                case "WIF":
+                    result = decodeWif(channel, remoteAddress, sentence);
+                    break;
+                case "GSM":
+                    result = decodeGsm(channel, remoteAddress, sentence);
+                    break;
+                case "VER":
+                    result = decodeVer(channel, remoteAddress, sentence);
+                    break;
+                case "PNA":
+                case "PFA":
+                    result = decodePna(channel, remoteAddress, sentence);
+                    break;
+                default:
+                    result = decodeOther(channel, remoteAddress, sentence, type);
+                    break;
+            }
+
+            if (result == null) {
+                result = decodeBasic(channel, remoteAddress, sentence, type);
+            }
+
+            if (result != null) {
+                if (result instanceof Position) {
+                    ((Position) result).set(Position.KEY_TYPE, type);
+                } else {
+                    for (Position p : (List<Position>) result) {
+                        p.set(Position.KEY_TYPE, type);
+                    }
+                }
+            }
+        }
+
+        return result;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/GlobalSatProtocol.java b/src/main/java/org/traccar/protocol/GlobalSatProtocol.java
new file mode 100644
index 000000000..5612515c9
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/GlobalSatProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.CharacterDelimiterFrameDecoder;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class GlobalSatProtocol extends BaseProtocol {
+
+    public GlobalSatProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, '!'));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new GlobalSatProtocolDecoder(GlobalSatProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/GlobalSatProtocolDecoder.java b/src/main/java/org/traccar/protocol/GlobalSatProtocolDecoder.java
new file mode 100644
index 000000000..3d4ab5760
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/GlobalSatProtocolDecoder.java
@@ -0,0 +1,248 @@
+/*
+ * Copyright 2013 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.Context;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class GlobalSatProtocolDecoder extends BaseProtocolDecoder {
+
+    private String format0;
+    private String format1;
+
+    public GlobalSatProtocolDecoder(Protocol protocol) {
+        super(protocol);
+
+        format0 = Context.getConfig().getString(getProtocolName() + ".format0", "TSPRXAB27GHKLMnaicz*U!");
+        format1 = Context.getConfig().getString(getProtocolName() + ".format1", "SARY*U!");
+    }
+
+    public void setFormat0(String format) {
+        format0 = format;
+    }
+
+    public void setFormat1(String format) {
+        format1 = format;
+    }
+
+    private Position decodeOriginal(Channel channel, SocketAddress remoteAddress, String sentence) {
+
+        if (channel != null) {
+            channel.writeAndFlush(new NetworkMessage("ACK\r", remoteAddress));
+        }
+
+        String format;
+        if (sentence.startsWith("GSr")) {
+            format = format0;
+        } else if (sentence.startsWith("GSh")) {
+            format = format1;
+        } else {
+            return null;
+        }
+
+        // Check that message contains required parameters
+        if (!format.contains("B") || !format.contains("S") || !(format.contains("1")
+                || format.contains("2") || format.contains("3")) || !(format.contains("6")
+                || format.contains("7") || format.contains("8"))) {
+            return null;
+        }
+
+        if (format.contains("*")) {
+            format = format.substring(0, format.indexOf('*'));
+            sentence = sentence.substring(0, sentence.indexOf('*'));
+        }
+        String[] values = sentence.split(",");
+
+        Position position = new Position(getProtocolName());
+
+        for (int formatIndex = 0, valueIndex = 1; formatIndex < format.length()
+                && valueIndex < values.length; formatIndex++) {
+            String value = values[valueIndex];
+
+            switch (format.charAt(formatIndex)) {
+                case 'S':
+                    DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, value);
+                    if (deviceSession == null) {
+                        return null;
+                    }
+                    position.setDeviceId(deviceSession.getDeviceId());
+                    break;
+                case 'A':
+                    if (value.isEmpty()) {
+                        position.setValid(false);
+                    } else {
+                        position.setValid(Integer.parseInt(value) != 1);
+                    }
+                    break;
+                case 'B':
+                    DateBuilder dateBuilder = new DateBuilder()
+                            .setDay(Integer.parseInt(value.substring(0, 2)))
+                            .setMonth(Integer.parseInt(value.substring(2, 4)))
+                            .setYear(Integer.parseInt(value.substring(4)));
+                    value = values[++valueIndex];
+                    dateBuilder
+                            .setHour(Integer.parseInt(value.substring(0, 2)))
+                            .setMinute(Integer.parseInt(value.substring(2, 4)))
+                            .setSecond(Integer.parseInt(value.substring(4)));
+                    position.setTime(dateBuilder.getDate());
+                    break;
+                case 'C':
+                    valueIndex += 1;
+                    break;
+                case '1':
+                    double longitude = Double.parseDouble(value.substring(1));
+                    if (value.charAt(0) == 'W') {
+                        longitude = -longitude;
+                    }
+                    position.setLongitude(longitude);
+                    break;
+                case '2':
+                    longitude = Double.parseDouble(value.substring(4)) / 60;
+                    longitude += Integer.parseInt(value.substring(1, 4));
+                    if (value.charAt(0) == 'W') {
+                        longitude = -longitude;
+                    }
+                    position.setLongitude(longitude);
+                    break;
+                case '3':
+                    position.setLongitude(Double.parseDouble(value) * 0.000001);
+                    break;
+                case '6':
+                    double latitude = Double.parseDouble(value.substring(1));
+                    if (value.charAt(0) == 'S') {
+                        latitude = -latitude;
+                    }
+                    position.setLatitude(latitude);
+                    break;
+                case '7':
+                    latitude = Double.parseDouble(value.substring(3)) / 60;
+                    latitude += Integer.parseInt(value.substring(1, 3));
+                    if (value.charAt(0) == 'S') {
+                        latitude = -latitude;
+                    }
+                    position.setLatitude(latitude);
+                    break;
+                case '8':
+                    position.setLatitude(Double.parseDouble(value) * 0.000001);
+                    break;
+                case 'G':
+                    position.setAltitude(Double.parseDouble(value));
+                    break;
+                case 'H':
+                    position.setSpeed(Double.parseDouble(value));
+                    break;
+                case 'I':
+                    position.setSpeed(UnitsConverter.knotsFromKph(Double.parseDouble(value)));
+                    break;
+                case 'J':
+                    position.setSpeed(UnitsConverter.knotsFromMph(Double.parseDouble(value)));
+                    break;
+                case 'K':
+                    position.setCourse(Double.parseDouble(value));
+                    break;
+                case 'N':
+                    if (value.endsWith("mV")) {
+                        position.set(Position.KEY_BATTERY,
+                                Integer.parseInt(value.substring(0, value.length() - 2)) / 1000.0);
+                    } else {
+                        position.set(Position.KEY_BATTERY_LEVEL, Integer.parseInt(value));
+                    }
+                    break;
+                default:
+                    // Unsupported
+                    break;
+            }
+
+            valueIndex += 1;
+        }
+        return position;
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("$")
+            .number("(d+),")                     // imei
+            .number("d+,")                       // mode
+            .number("(d+),")                     // fix
+            .number("(dd)(dd)(dd),")             // date (ddmmyy)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .expression("([EW])")
+            .number("(ddd)(dd.d+),")             // longitude (dddmm.mmmm)
+            .expression("([NS])")
+            .number("(dd)(dd.d+),")              // latitude (ddmm.mmmm)
+            .number("(d+.?d*),")                 // altitude
+            .number("(d+.?d*),")                 // speed
+            .number("(d+.?d*)?,")                // course
+            .number("(d+)[,*]")                  // satellites
+            .number("(d+.?d*)")                  // hdop
+            .compile();
+
+    private Position decodeAlternative(Channel channel, SocketAddress remoteAddress, String sentence) {
+
+        Parser parser = new Parser(PATTERN, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setValid(!parser.next().equals("1"));
+        position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
+        position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN));
+        position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN));
+        position.setAltitude(parser.nextDouble(0));
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
+
+        position.set(Position.KEY_SATELLITES, parser.nextInt(0));
+        position.set(Position.KEY_HDOP, parser.nextDouble());
+
+        return position;
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        String sentence = (String) msg;
+
+        if (sentence.startsWith("GS")) {
+            return decodeOriginal(channel, remoteAddress, sentence);
+        } else if (sentence.startsWith("$")) {
+            return decodeAlternative(channel, remoteAddress, sentence);
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/GnxProtocol.java b/src/main/java/org/traccar/protocol/GnxProtocol.java
new file mode 100644
index 000000000..3576bf805
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/GnxProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.CharacterDelimiterFrameDecoder;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class GnxProtocol extends BaseProtocol {
+
+    public GnxProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, "\n\r"));
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new GnxProtocolDecoder(GnxProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/GnxProtocolDecoder.java b/src/main/java/org/traccar/protocol/GnxProtocolDecoder.java
new file mode 100644
index 000000000..c9c221a69
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/GnxProtocolDecoder.java
@@ -0,0 +1,111 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class GnxProtocolDecoder extends BaseProtocolDecoder {
+
+    public GnxProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN_LOCATION = new PatternBuilder()
+            .number("(d+),")                     // imei
+            .number("d+,")                       // length
+            .expression("([01]),")               // history
+            .number("(dd)(dd)(dd),")             // device time (hhmmss)
+            .number("(dd)(dd)(dd),")             // device date (ddmmyy)
+            .number("(dd)(dd)(dd),")             // fix time (hhmmss)
+            .number("(dd)(dd)(dd),")             // fix date (ddmmyy)
+            .number("(d),")                      // valid
+            .number("(dd.d+),")                  // latitude
+            .expression("([NS]),")
+            .number("(ddd.d+),")                 // longitude
+            .expression("([EW]),")
+            .compile();
+
+    private static final Pattern PATTERN_MIF = new PatternBuilder()
+            .text("$GNX_MIF,")
+            .expression(PATTERN_LOCATION.pattern())
+            .expression("[01],")                 // valid card
+            .expression("([^,]+),")              // rfid
+            .any()
+            .compile();
+
+    private static final Pattern PATTERN_OTHER = new PatternBuilder()
+            .text("$GNX_")
+            .expression("...,")
+            .expression(PATTERN_LOCATION.pattern())
+            .any()
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        String sentence = (String) msg;
+        String type = sentence.substring(5, 8);
+
+        Pattern pattern;
+        if (type.equals("MIF")) {
+            pattern = PATTERN_MIF;
+        } else {
+            pattern = PATTERN_OTHER;
+        }
+
+        Parser parser = new Parser(pattern, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        if (parser.nextInt(0) == 1) {
+            position.set(Position.KEY_ARCHIVE, true);
+        }
+
+        position.setDeviceTime(parser.nextDateTime(Parser.DateTimeFormat.HMS_DMY, "GMT+5:30"));
+        position.setFixTime(parser.nextDateTime(Parser.DateTimeFormat.HMS_DMY, "GMT+5:30"));
+
+        position.setValid(parser.nextInt(0) != 0);
+
+        position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM));
+        position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM));
+
+        if (type.equals("MIF")) {
+            position.set(Position.KEY_DRIVER_UNIQUE_ID, parser.next());
+        }
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/GoSafeProtocol.java b/src/main/java/org/traccar/protocol/GoSafeProtocol.java
new file mode 100644
index 000000000..853b78a16
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/GoSafeProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.CharacterDelimiterFrameDecoder;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class GoSafeProtocol extends BaseProtocol {
+
+    public GoSafeProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, '#'));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new GoSafeProtocolDecoder(GoSafeProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/GoSafeProtocolDecoder.java b/src/main/java/org/traccar/protocol/GoSafeProtocolDecoder.java
new file mode 100644
index 000000000..95ef18f20
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/GoSafeProtocolDecoder.java
@@ -0,0 +1,269 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.CellTower;
+import org.traccar.model.Network;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.Date;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.regex.Pattern;
+
+public class GoSafeProtocolDecoder extends BaseProtocolDecoder {
+
+    public GoSafeProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("*GS")                         // header
+            .number("d+,")                       // protocol version
+            .number("(d+),")                     // imei
+            .number("(dd)(dd)(dd)")              // time (hhmmss)
+            .number("(dd)(dd)(dd),")             // date (ddmmyy)
+            .expression("([^#]*)#?")             // data
+            .compile();
+
+    private static final Pattern PATTERN_OLD = new PatternBuilder()
+            .text("*GS")                         // header
+            .number("d+,")                       // protocol version
+            .number("(d+),")                     // imei
+            .text("GPS:")
+            .number("(dd)(dd)(dd);")             // time (hhmmss)
+            .number("d;").optional()             // fix type
+            .expression("([AV]);")               // validity
+            .number("([NS])(d+.d+);")            // latitude
+            .number("([EW])(d+.d+);")            // longitude
+            .number("(d+)?;")                    // speed
+            .number("(d+);")                     // course
+            .number("(d+.?d*)").optional()       // hdop
+            .number("(dd)(dd)(dd)")              // date (ddmmyy)
+            .any()
+            .compile();
+
+    private void decodeFragment(Position position, String fragment) {
+        int dataIndex = fragment.indexOf(':');
+        int index = 0;
+        String[] values;
+        if (fragment.length() == dataIndex + 1) {
+            values = new String[0];
+        } else {
+            values = fragment.substring(dataIndex + 1).split(";");
+        }
+        switch (fragment.substring(0, dataIndex)) {
+            case "GPS":
+                position.setValid(values[index++].equals("A"));
+                position.set(Position.KEY_SATELLITES, Integer.parseInt(values[index++]));
+                position.setLatitude(Double.parseDouble(values[index].substring(1)));
+                if (values[index++].charAt(0) == 'S') {
+                    position.setLatitude(-position.getLatitude());
+                }
+                position.setLongitude(Double.parseDouble(values[index].substring(1)));
+                if (values[index++].charAt(0) == 'W') {
+                    position.setLongitude(-position.getLongitude());
+                }
+                if (!values[index++].isEmpty()) {
+                    position.setSpeed(UnitsConverter.knotsFromKph(Integer.parseInt(values[index - 1])));
+                }
+                position.setCourse(Integer.parseInt(values[index++]));
+                if (index < values.length) {
+                    position.setAltitude(Integer.parseInt(values[index++]));
+                }
+                if (index < values.length) {
+                    position.set(Position.KEY_HDOP, Double.parseDouble(values[index++]));
+                }
+                if (index < values.length) {
+                    position.set(Position.KEY_VDOP, Double.parseDouble(values[index++]));
+                }
+                break;
+            case "GSM":
+                index += 1; // registration status
+                index += 1; // signal strength
+                position.setNetwork(new Network(CellTower.from(
+                        Integer.parseInt(values[index++]), Integer.parseInt(values[index++]),
+                        Integer.parseInt(values[index++], 16), Integer.parseInt(values[index++], 16),
+                        Integer.parseInt(values[index++]))));
+                break;
+            case "COT":
+                if (index < values.length) {
+                    position.set(Position.KEY_ODOMETER, Long.parseLong(values[index++]));
+                }
+                if (index < values.length) {
+                    String[] hours = values[index].split("-");
+                    position.set(Position.KEY_HOURS, (Integer.parseInt(hours[0]) * 3600
+                            + (hours.length > 1 ? Integer.parseInt(hours[1]) * 60 : 0)
+                            + (hours.length > 2 ? Integer.parseInt(hours[2]) : 0)) * 1000);
+                }
+                break;
+            case "ADC":
+                position.set(Position.KEY_POWER, Double.parseDouble(values[index++]));
+                if (index < values.length) {
+                    position.set(Position.KEY_BATTERY, Double.parseDouble(values[index++]));
+                }
+                if (index < values.length) {
+                    position.set(Position.PREFIX_ADC + 1, Double.parseDouble(values[index++]));
+                }
+                if (index < values.length) {
+                    position.set(Position.PREFIX_ADC + 2, Double.parseDouble(values[index++]));
+                }
+                break;
+            case "DTT":
+                position.set(Position.KEY_STATUS, Integer.parseInt(values[index++], 16));
+                if (!values[index++].isEmpty()) {
+                    int io = Integer.parseInt(values[index - 1], 16);
+                    position.set(Position.KEY_IGNITION, BitUtil.check(io, 0));
+                    position.set(Position.PREFIX_IN + 1, BitUtil.check(io, 1));
+                    position.set(Position.PREFIX_IN + 2, BitUtil.check(io, 2));
+                    position.set(Position.PREFIX_IN + 3, BitUtil.check(io, 3));
+                    position.set(Position.PREFIX_IN + 4, BitUtil.check(io, 4));
+                    position.set(Position.PREFIX_OUT + 1, BitUtil.check(io, 5));
+                    position.set(Position.PREFIX_OUT + 2, BitUtil.check(io, 6));
+                    position.set(Position.PREFIX_OUT + 3, BitUtil.check(io, 7));
+                }
+                position.set(Position.KEY_GEOFENCE, values[index++] + values[index++]);
+                position.set("eventStatus", values[index++]);
+                if (index < values.length) {
+                    position.set("packetType", values[index++]);
+                }
+                break;
+            case "ETD":
+                position.set("eventData", values[index++]);
+                break;
+            case "OBD":
+                position.set("obd", values[index++]);
+                break;
+            case "TAG":
+                position.set("tagData", values[index++]);
+                break;
+            case "IWD":
+                if (index < values.length && values[index + 1].equals("0")) {
+                    position.set(Position.KEY_DRIVER_UNIQUE_ID, values[index + 2]);
+                }
+                break;
+            default:
+                break;
+        }
+    }
+
+    private Object decodeData(DeviceSession deviceSession, Date time, String data) {
+
+        List<Position> positions = new LinkedList<>();
+        Position position = null;
+        int index = 0;
+        String[] fragments = data.split(",");
+
+        while (index < fragments.length) {
+
+            if (fragments[index].isEmpty() || Character.isDigit(fragments[index].charAt(0))) {
+
+                if (position != null) {
+                    positions.add(position);
+                }
+
+                position = new Position(getProtocolName());
+                position.setDeviceId(deviceSession.getDeviceId());
+                position.setTime(time);
+
+                if (!fragments[index++].isEmpty()) {
+                    position.set(Position.KEY_EVENT, Integer.parseInt(fragments[index - 1]));
+                }
+
+            } else {
+
+                decodeFragment(position, fragments[index++]);
+
+            }
+
+        }
+
+        if (position != null) {
+            positions.add(position);
+        }
+
+        return positions;
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        if (channel != null) {
+            channel.writeAndFlush(new NetworkMessage("1234", remoteAddress));
+        }
+
+        String sentence = (String) msg;
+        Pattern pattern = PATTERN;
+        if (sentence.startsWith("*GS02")) {
+            pattern = PATTERN_OLD;
+        }
+
+        Parser parser = new Parser(pattern, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        if (pattern == PATTERN_OLD) {
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            DateBuilder dateBuilder = new DateBuilder()
+                    .setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+
+            position.setValid(parser.next().equals("A"));
+            position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG));
+            position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG));
+            position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
+            position.setCourse(parser.nextDouble(0));
+
+            position.set(Position.KEY_HDOP, parser.next());
+
+            dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+            position.setTime(dateBuilder.getDate());
+
+            return position;
+
+        } else {
+
+            Date time = new Date();
+            if (parser.hasNext(6)) {
+                time = parser.nextDateTime(Parser.DateTimeFormat.HMS_DMY);
+            }
+
+            return decodeData(deviceSession, time, parser.next());
+
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/GotopProtocol.java b/src/main/java/org/traccar/protocol/GotopProtocol.java
new file mode 100644
index 000000000..07fe02248
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/GotopProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.CharacterDelimiterFrameDecoder;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class GotopProtocol extends BaseProtocol {
+
+    public GotopProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, '#'));
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new GotopProtocolDecoder(GotopProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/GotopProtocolDecoder.java b/src/main/java/org/traccar/protocol/GotopProtocolDecoder.java
new file mode 100644
index 000000000..2ef975fe5
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/GotopProtocolDecoder.java
@@ -0,0 +1,82 @@
+/*
+ * Copyright 2013 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class GotopProtocolDecoder extends BaseProtocolDecoder {
+
+    public GotopProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .number("(d+),")                     // imei
+            .expression("[^,]+,")                // type
+            .expression("([AV]),")               // validity
+            .number("DATE:(dd)(dd)(dd),")        // date (yyddmm)
+            .number("TIME:(dd)(dd)(dd),")        // time (hhmmss)
+            .number("LAT:(d+.d+)([NS]),")        // latitude
+            .number("LOT:(d+.d+)([EW]),")        // longitude
+            .text("Speed:").number("(d+.d+),")   // speed
+            .expression("([^,]+),")              // status
+            .number("(d+)?")                     // course
+            .any()
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setValid(parser.next().equals("A"));
+
+        position.setTime(parser.nextDateTime());
+
+        position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM));
+        position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM));
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
+
+        position.set(Position.KEY_STATUS, parser.next());
+
+        position.setCourse(parser.nextDouble(0));
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Gps056FrameDecoder.java b/src/main/java/org/traccar/protocol/Gps056FrameDecoder.java
new file mode 100644
index 000000000..0d84bf231
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Gps056FrameDecoder.java
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+import org.traccar.BaseFrameDecoder;
+
+import java.nio.charset.StandardCharsets;
+
+public class Gps056FrameDecoder extends BaseFrameDecoder {
+
+    private static final int MESSAGE_HEADER = 4;
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+        if (buf.readableBytes() >= MESSAGE_HEADER) {
+            int length = Integer.parseInt(buf.toString(2, 2, StandardCharsets.US_ASCII)) + 5;
+            if (buf.readableBytes() >= length) {
+                ByteBuf frame = buf.readRetainedSlice(length);
+                while (buf.isReadable() && buf.getUnsignedByte(buf.readerIndex()) != '$') {
+                    buf.readByte();
+                }
+                return frame;
+            }
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Gps056Protocol.java b/src/main/java/org/traccar/protocol/Gps056Protocol.java
new file mode 100644
index 000000000..b6ab10a19
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Gps056Protocol.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class Gps056Protocol extends BaseProtocol {
+
+    public Gps056Protocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new Gps056FrameDecoder());
+                pipeline.addLast(new Gps056ProtocolDecoder(Gps056Protocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Gps056ProtocolDecoder.java b/src/main/java/org/traccar/protocol/Gps056ProtocolDecoder.java
new file mode 100644
index 000000000..0ba79bb51
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Gps056ProtocolDecoder.java
@@ -0,0 +1,140 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+
+public class Gps056ProtocolDecoder extends BaseProtocolDecoder {
+
+    public Gps056ProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static void sendResponse(Channel channel, String type, String imei, ByteBuf content) {
+        if (channel != null) {
+            ByteBuf response = Unpooled.buffer();
+            String header = "*" + type + imei;
+            response.writeBytes(header.getBytes(StandardCharsets.US_ASCII));
+            if (content != null) {
+                response.writeBytes(content);
+            }
+            response.writeByte('#');
+            channel.writeAndFlush(new NetworkMessage(response, channel.remoteAddress()));
+        }
+    }
+
+    private static double decodeCoordinate(ByteBuf buf) {
+        double degrees = buf.getUnsignedShort(buf.readerIndex()) / 100;
+        double minutes = buf.readUnsignedShort() % 100 + buf.readUnsignedShort() * 0.0001;
+        degrees += minutes / 60;
+        byte hemisphere = buf.readByte();
+        if (hemisphere == 'S' || hemisphere == 'W') {
+            degrees = -degrees;
+        }
+        return degrees;
+    }
+
+    private static void decodeStatus(ByteBuf buf, Position position) {
+
+        position.set(Position.KEY_INPUT, buf.readUnsignedByte());
+        position.set(Position.KEY_OUTPUT, buf.readUnsignedByte());
+
+        position.set(Position.PREFIX_ADC + 1, buf.readShortLE() * 5.06); // mV
+
+        position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
+        position.set(Position.KEY_RSSI, buf.readUnsignedByte());
+
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        buf.skipBytes(2); // header
+        buf.skipBytes(2); // length
+
+        String type = buf.readSlice(7).toString(StandardCharsets.US_ASCII);
+        String imei = buf.readSlice(15).toString(StandardCharsets.US_ASCII);
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        if (type.startsWith("LOGN")) {
+
+            ByteBuf content = Unpooled.copiedBuffer("1", StandardCharsets.US_ASCII);
+            try {
+                sendResponse(channel, "LGSA" + type.substring(4), imei, content);
+            } finally {
+                content.release();
+            }
+
+        } else if (type.startsWith("GPSL")) {
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            DateBuilder dateBuilder = new DateBuilder()
+                    .setDateReverse(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte())
+                    .setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte());
+
+            position.setValid(true);
+            position.setTime(dateBuilder.getDate());
+            position.setLatitude(decodeCoordinate(buf));
+            position.setLongitude(decodeCoordinate(buf));
+            position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte()));
+            position.setCourse(buf.readUnsignedShort());
+
+            decodeStatus(buf, position);
+
+            sendResponse(channel, "GPSA" + type.substring(4), imei, buf.readSlice(2));
+
+            return position;
+
+        } else if (type.startsWith("SYNC")) {
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            getLastLocation(position, null);
+
+            decodeStatus(buf, position);
+
+            sendResponse(channel, "SYSA" + type.substring(4), imei, null);
+
+            return position;
+
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Gps103Protocol.java b/src/main/java/org/traccar/protocol/Gps103Protocol.java
new file mode 100644
index 000000000..6272a3fd1
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Gps103Protocol.java
@@ -0,0 +1,60 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.CharacterDelimiterFrameDecoder;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+import org.traccar.model.Command;
+
+public class Gps103Protocol extends BaseProtocol {
+
+    public Gps103Protocol() {
+        setSupportedDataCommands(
+                Command.TYPE_CUSTOM,
+                Command.TYPE_POSITION_SINGLE,
+                Command.TYPE_POSITION_PERIODIC,
+                Command.TYPE_POSITION_STOP,
+                Command.TYPE_ENGINE_STOP,
+                Command.TYPE_ENGINE_RESUME,
+                Command.TYPE_ALARM_ARM,
+                Command.TYPE_ALARM_DISARM,
+                Command.TYPE_REQUEST_PHOTO);
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CharacterDelimiterFrameDecoder(2048, false, "\r\n", "\n", ";", "*"));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new Gps103ProtocolEncoder());
+                pipeline.addLast(new Gps103ProtocolDecoder(Gps103Protocol.this));
+            }
+        });
+        addServer(new TrackerServer(true, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new Gps103ProtocolEncoder());
+                pipeline.addLast(new Gps103ProtocolDecoder(Gps103Protocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Gps103ProtocolDecoder.java b/src/main/java/org/traccar/protocol/Gps103ProtocolDecoder.java
new file mode 100644
index 000000000..aa02e8ad4
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Gps103ProtocolDecoder.java
@@ -0,0 +1,422 @@
+/*
+ * Copyright 2012 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.Context;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.DataConverter;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.CellTower;
+import org.traccar.model.Network;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class Gps103ProtocolDecoder extends BaseProtocolDecoder {
+
+    private int photoPackets = 0;
+    private ByteBuf photo;
+
+    public Gps103ProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("imei:")
+            .number("(d+),")                     // imei
+            .expression("([^,]+),")              // alarm
+            .groupBegin()
+            .number("(dd)/?(dd)/?(dd) ?")        // local date (yymmdd)
+            .number("(dd):?(dd)(?:dd)?,")        // local time (hhmmss)
+            .or()
+            .number("d*,")
+            .groupEnd()
+            .expression("([^,]+)?,")             // rfid
+            .groupBegin()
+            .text("L,,,")
+            .number("(x+),,")                    // lac
+            .number("(x+),,,")                   // cid
+            .or()
+            .text("F,")
+            .groupBegin()
+            .number("(dd)(dd)(dd).d+")           // time utc (hhmmss)
+            .or()
+            .number("(?:d{1,5}.d+)?")
+            .groupEnd()
+            .text(",")
+            .expression("([AV]),")               // validity
+            .expression("([NS]),").optional()
+            .number("(d+)(dd.d+),")              // latitude (ddmm.mmmm)
+            .expression("([NS]),").optional()
+            .expression("([EW]),").optional()
+            .number("(d+)(dd.d+),")              // longitude (dddmm.mmmm)
+            .expression("([EW])?,").optional()
+            .number("(d+.?d*)?").optional()      // speed
+            .number(",(d+.?d*)?").optional()     // course
+            .number(",(d+.?d*)?").optional()     // altitude
+            .number(",([01])?").optional()       // ignition
+            .number(",([01])?").optional()       // door
+            .groupBegin()
+            .number(",(?:(d+.d+)%)?")            // fuel 1
+            .number(",(?:(d+.d+)%|d+)?")         // fuel 2
+            .groupEnd("?")
+            .number(",([-+]?d+)?").optional()    // temperature
+            .groupEnd()
+            .any()
+            .compile();
+
+    private static final Pattern PATTERN_OBD = new PatternBuilder()
+            .text("imei:")
+            .number("(d+),")                     // imei
+            .expression("OBD,")                  // type
+            .number("(dd)(dd)(dd)")              // date (yymmdd)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .number("(d+)?,")                    // odometer
+            .number("(d+.d+)?,")                 // fuel instant
+            .number("(d+.d+)?,")                 // fuel average
+            .number("(d+)?,")                    // hours
+            .number("(d+),")                     // speed
+            .number("(d+.?d*%),")                // power load
+            .number("(?:([-+]?d+)|[-+]?),")      // temperature
+            .number("(d+.?d*%),")                // throttle
+            .number("(d+),")                     // rpm
+            .number("(d+.d+),")                  // battery
+            .number("([^;]*)")                   // dtcs
+            .any()
+            .compile();
+
+    private static final Pattern PATTERN_ALT = new PatternBuilder()
+            .text("imei:")
+            .number("(d+),")                     // imei
+            .expression("[^,]+,")
+            .expression("(?:-+|(.+)),")          // event
+            .expression("(?:-+|(.+)),")          // sensor id
+            .expression("(?:-+|(.+)),")          // sensor voltage
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .number("(dd)(dd)(dd),")             // date (ddmmyy)
+            .number("(d+),")                     // rssi
+            .number("(d),")                      // gps status
+            .number("(-?d+.d+),")                // latitude
+            .number("(-?d+.d+),")                // longitude
+            .number("(d+),")                     // speed
+            .number("(d+),")                     // course
+            .number("(-?d+),")                   // altitude
+            .number("(d+.d+),")                  // hdop
+            .number("(d+),")                     // satellites
+            .number("([01]),")                   // ignition
+            .number("([01]),")                   // charge
+            .expression("(?:-+|(.+))")           // error
+            .any()
+            .compile();
+
+    private String decodeAlarm(String value) {
+        if (value.startsWith("T:")) {
+            return Position.ALARM_TEMPERATURE;
+        } else if (value.startsWith("oil")) {
+            return Position.ALARM_FUEL_LEAK;
+        }
+        switch (value) {
+            case "tracker":
+                return null;
+            case "help me":
+                return Position.ALARM_SOS;
+            case "low battery":
+                return Position.ALARM_LOW_BATTERY;
+            case "stockade":
+                return Position.ALARM_GEOFENCE;
+            case "move":
+                return Position.ALARM_MOVEMENT;
+            case "speed":
+                return Position.ALARM_OVERSPEED;
+            case "acc on":
+                return Position.ALARM_POWER_ON;
+            case "acc off":
+                return Position.ALARM_POWER_OFF;
+            case "door alarm":
+                return Position.ALARM_DOOR;
+            case "ac alarm":
+                return Position.ALARM_POWER_CUT;
+            case "accident alarm":
+                return Position.ALARM_ACCIDENT;
+            case "sensor alarm":
+                return Position.ALARM_SHOCK;
+            case "bonnet alarm":
+                return Position.ALARM_BONNET;
+            case "footbrake alarm":
+                return Position.ALARM_FOOT_BRAKE;
+            case "DTC":
+                return Position.ALARM_FAULT;
+            default:
+                return null;
+        }
+    }
+
+    private Position decodeRegular(Channel channel, SocketAddress remoteAddress, String sentence) {
+
+        Parser parser = new Parser(PATTERN, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        String imei = parser.next();
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        String alarm = parser.next();
+        position.set(Position.KEY_ALARM, decodeAlarm(alarm));
+        if (alarm.equals("help me")) {
+            if (channel != null) {
+                channel.writeAndFlush(new NetworkMessage("**,imei:" + imei + ",E;", remoteAddress));
+            }
+        } else if (alarm.startsWith("vt")) {
+            photoPackets = Integer.parseInt(alarm.substring(2));
+            photo = Unpooled.buffer();
+        } else if (alarm.equals("acc on")) {
+            position.set(Position.KEY_IGNITION, true);
+        } else if (alarm.equals("acc off")) {
+            position.set(Position.KEY_IGNITION, false);
+        } else if (alarm.startsWith("T:")) {
+            position.set(Position.PREFIX_TEMP + 1, Double.parseDouble(alarm.substring(2)));
+        } else if (alarm.startsWith("oil ")) {
+            position.set(Position.KEY_FUEL_LEVEL, Double.parseDouble(alarm.substring(4)));
+        } else if (!position.getAttributes().containsKey(Position.KEY_ALARM) && !alarm.equals("tracker")) {
+            position.set(Position.KEY_EVENT, alarm);
+        }
+
+        DateBuilder dateBuilder = new DateBuilder()
+                .setDate(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+
+        int localHours = parser.nextInt(0);
+        int localMinutes = parser.nextInt(0);
+
+        String rfid = parser.next();
+        if (alarm.equals("rfid")) {
+            position.set(Position.KEY_DRIVER_UNIQUE_ID, rfid);
+        }
+
+        if (parser.hasNext(2)) {
+
+            getLastLocation(position, null);
+
+            position.setNetwork(new Network(CellTower.fromLacCid(parser.nextHexInt(0), parser.nextHexInt(0))));
+
+        } else {
+
+            String utcHours = parser.next();
+            String utcMinutes = parser.next();
+
+            dateBuilder.setTime(localHours, localMinutes, parser.nextInt(0));
+
+            // Timezone calculation
+            if (utcHours != null && utcMinutes != null) {
+                int deltaMinutes = (localHours - Integer.parseInt(utcHours)) * 60;
+                deltaMinutes += localMinutes - Integer.parseInt(utcMinutes);
+                if (deltaMinutes <= -12 * 60) {
+                    deltaMinutes += 24 * 60;
+                } else if (deltaMinutes > 12 * 60) {
+                    deltaMinutes -= 24 * 60;
+                }
+                dateBuilder.addMinute(-deltaMinutes);
+            }
+            position.setTime(dateBuilder.getDate());
+
+            position.setValid(parser.next().equals("A"));
+            position.setFixTime(position.getDeviceTime());
+            position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN_HEM));
+            position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN_HEM));
+            position.setSpeed(parser.nextDouble(0));
+            position.setCourse(parser.nextDouble(0));
+            position.setAltitude(parser.nextDouble(0));
+
+            if (parser.hasNext()) {
+                position.set(Position.KEY_IGNITION, parser.nextInt() == 1);
+            }
+            if (parser.hasNext()) {
+                position.set(Position.KEY_DOOR, parser.nextInt() == 1);
+            }
+            position.set("fuel1", parser.nextDouble());
+            position.set("fuel2", parser.nextDouble());
+            position.set(Position.PREFIX_TEMP + 1, parser.nextInt());
+
+        }
+
+        return position;
+    }
+
+    private Position decodeObd(Channel channel, SocketAddress remoteAddress, String sentence) {
+
+        Parser parser = new Parser(PATTERN_OBD, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        getLastLocation(position, parser.nextDateTime());
+
+        position.set(Position.KEY_ODOMETER, parser.nextInt(0));
+        parser.nextDouble(0); // instant fuel consumption
+        position.set(Position.KEY_FUEL_CONSUMPTION, parser.nextDouble(0));
+        if (parser.hasNext()) {
+            position.set(Position.KEY_HOURS, UnitsConverter.msFromHours(parser.nextInt()));
+        }
+        position.set(Position.KEY_OBD_SPEED, parser.nextInt(0));
+        position.set(Position.KEY_ENGINE_LOAD, parser.next());
+        position.set(Position.KEY_COOLANT_TEMP, parser.nextInt());
+        position.set(Position.KEY_THROTTLE, parser.next());
+        position.set(Position.KEY_RPM, parser.nextInt(0));
+        position.set(Position.KEY_BATTERY, parser.nextDouble(0));
+        position.set(Position.KEY_DTCS, parser.next().replace(',', ' ').trim());
+
+        return position;
+    }
+
+
+    private Position decodeAlternative(Channel channel, SocketAddress remoteAddress, String sentence) {
+
+        Parser parser = new Parser(PATTERN_ALT, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.set(Position.KEY_EVENT, parser.next());
+        position.set("sensorId", parser.next());
+        position.set("sensorVoltage", parser.nextDouble());
+
+        position.setTime(parser.nextDateTime(Parser.DateTimeFormat.HMS_DMY));
+
+        position.set(Position.KEY_RSSI, parser.nextInt());
+
+        position.setValid(parser.nextInt() > 0);
+        position.setLatitude(parser.nextDouble());
+        position.setLongitude(parser.nextDouble());
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextInt()));
+        position.setCourse(parser.nextInt());
+        position.setAltitude(parser.nextInt());
+
+        position.set(Position.KEY_HDOP, parser.nextDouble());
+        position.set(Position.KEY_SATELLITES, parser.nextInt());
+        position.set(Position.KEY_IGNITION, parser.nextInt() > 0);
+        position.set(Position.KEY_CHARGE, parser.nextInt() > 0);
+        position.set("error", parser.next());
+
+        return position;
+    }
+
+    private Position decodePhoto(Channel channel, SocketAddress remoteAddress, String sentence) {
+
+        String imei = sentence.substring(5, 5 + 15);
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        ByteBuf buf = Unpooled.wrappedBuffer(DataConverter.parseHex(
+                sentence.substring(24, sentence.endsWith(";") ? sentence.length() - 1 : sentence.length())));
+        int index = buf.readUnsignedShortLE();
+        photo.writeBytes(buf, buf.readerIndex() + 2, buf.readableBytes() - 4);
+
+        if (index + 1 >= photoPackets) {
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            getLastLocation(position, null);
+
+            try {
+                position.set(Position.KEY_IMAGE, Context.getMediaManager().writeFile(imei, photo, "jpg"));
+            } finally {
+                photoPackets = 0;
+                photo.release();
+                photo = null;
+            }
+
+            return position;
+        } else {
+            return null;
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        String sentence = (String) msg;
+
+        if (sentence.contains("imei:") && sentence.length() <= 30) {
+            if (channel != null) {
+                channel.writeAndFlush(new NetworkMessage("LOAD", remoteAddress));
+                Matcher matcher = Pattern.compile("imei:(\\d+),").matcher(sentence);
+                if (matcher.find()) {
+                    getDeviceSession(channel, remoteAddress, matcher.group(1));
+                }
+            }
+            return null;
+        }
+
+        if (!sentence.isEmpty() && Character.isDigit(sentence.charAt(0))) {
+            if (channel != null) {
+                channel.writeAndFlush(new NetworkMessage("ON", remoteAddress));
+            }
+            int start = sentence.indexOf("imei:");
+            if (start >= 0) {
+                sentence = sentence.substring(start);
+            } else {
+                return null;
+            }
+        }
+
+        if (sentence.substring(21, 21 + 2).equals("vr")) {
+            return decodePhoto(channel, remoteAddress, sentence);
+        } else if (sentence.substring(21, 21 + 3).contains("OBD")) {
+            return decodeObd(channel, remoteAddress, sentence);
+        } else if (sentence.endsWith("*")) {
+            return decodeAlternative(channel, remoteAddress, sentence);
+        } else {
+            return decodeRegular(channel, remoteAddress, sentence);
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Gps103ProtocolEncoder.java b/src/main/java/org/traccar/protocol/Gps103ProtocolEncoder.java
new file mode 100644
index 000000000..47ef2f333
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Gps103ProtocolEncoder.java
@@ -0,0 +1,68 @@
+/*
+ * Copyright 2015 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.StringProtocolEncoder;
+import org.traccar.model.Command;
+
+public class Gps103ProtocolEncoder extends StringProtocolEncoder implements StringProtocolEncoder.ValueFormatter {
+
+    @Override
+    public String formatValue(String key, Object value) {
+
+        if (key.equals(Command.KEY_FREQUENCY)) {
+            long frequency = ((Number) value).longValue();
+            if (frequency / 60 / 60 > 0) {
+                return String.format("%02dh", frequency / 60 / 60);
+            } else if (frequency / 60 > 0) {
+                return String.format("%02dm", frequency / 60);
+            } else {
+                return String.format("%02ds", frequency);
+            }
+        }
+
+        return null;
+    }
+
+    @Override
+    protected Object encodeCommand(Command command) {
+
+        switch (command.getType()) {
+            case Command.TYPE_CUSTOM:
+                return formatCommand(command, "**,imei:{%s},{%s}", Command.KEY_UNIQUE_ID, Command.KEY_DATA);
+            case Command.TYPE_POSITION_STOP:
+                return formatCommand(command, "**,imei:{%s},A", Command.KEY_UNIQUE_ID);
+            case Command.TYPE_POSITION_SINGLE:
+                return formatCommand(command, "**,imei:{%s},B", Command.KEY_UNIQUE_ID);
+            case Command.TYPE_POSITION_PERIODIC:
+                return formatCommand(
+                        command, "**,imei:{%s},C,{%s}", this, Command.KEY_UNIQUE_ID, Command.KEY_FREQUENCY);
+            case Command.TYPE_ENGINE_STOP:
+                return formatCommand(command, "**,imei:{%s},J", Command.KEY_UNIQUE_ID);
+            case Command.TYPE_ENGINE_RESUME:
+                return formatCommand(command, "**,imei:{%s},K", Command.KEY_UNIQUE_ID);
+            case Command.TYPE_ALARM_ARM:
+                return formatCommand(command, "**,imei:{%s},L", Command.KEY_UNIQUE_ID);
+            case Command.TYPE_ALARM_DISARM:
+                return formatCommand(command, "**,imei:{%s},M", Command.KEY_UNIQUE_ID);
+            case Command.TYPE_REQUEST_PHOTO:
+                return formatCommand(command, "**,imei:{%s},160", Command.KEY_UNIQUE_ID);
+            default:
+                return null;
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/GpsGateProtocol.java b/src/main/java/org/traccar/protocol/GpsGateProtocol.java
new file mode 100644
index 000000000..a131b6f48
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/GpsGateProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.CharacterDelimiterFrameDecoder;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class GpsGateProtocol extends BaseProtocol {
+
+    public GpsGateProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, "\0", "\n", "\r\n"));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new GpsGateProtocolDecoder(GpsGateProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/GpsGateProtocolDecoder.java b/src/main/java/org/traccar/protocol/GpsGateProtocolDecoder.java
new file mode 100644
index 000000000..cc187225b
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/GpsGateProtocolDecoder.java
@@ -0,0 +1,170 @@
+/*
+ * Copyright 2013 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.Checksum;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class GpsGateProtocolDecoder extends BaseProtocolDecoder {
+
+    public GpsGateProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN_GPRMC = new PatternBuilder()
+            .text("$GPRMC,")
+            .number("(dd)(dd)(dd).?d*,")         // time (hhmmss)
+            .expression("([AV]),")               // validity
+            .number("(dd)(dd.d+),")              // latitude
+            .expression("([NS]),")
+            .number("(ddd)(dd.d+),")             // longitude
+            .expression("([EW]),")
+            .number("(d+.d+)?,")                 // speed
+            .number("(d+.d+)?,")                 // course
+            .number("(dd)(dd)(dd)")              // date (ddmmyy)
+            .any()
+            .compile();
+
+    private static final Pattern PATTERN_FRCMD = new PatternBuilder()
+            .text("$FRCMD,")
+            .number("(d+),")                     // imei
+            .expression("[^,]*,")                // command
+            .expression("[^,]*,")
+            .number("(d+)(dd.d+),")              // latitude
+            .expression("([NS]),")
+            .number("(d+)(dd.d+),")              // longitude
+            .expression("([EW]),")
+            .number("(d+.?d*),")                 // altitude
+            .number("(d+.?d*),")                 // speed
+            .number("(d+.?d*)?,")                // course
+            .number("(dd)(dd)(dd),")             // date (ddmmyy)
+            .number("(dd)(dd)(dd).?d*,")         // time (hhmmss)
+            .expression("([01])")                // validity
+            .any()
+            .compile();
+
+    private void send(Channel channel, SocketAddress remoteAddress, String message) {
+        if (channel != null) {
+            channel.writeAndFlush(new NetworkMessage(message + Checksum.nmea(message) + "\r\n", remoteAddress));
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        String sentence = (String) msg;
+
+        if (sentence.startsWith("$FRLIN,")) {
+
+            int beginIndex = sentence.indexOf(',', 7);
+            if (beginIndex != -1) {
+                beginIndex += 1;
+                int endIndex = sentence.indexOf(',', beginIndex);
+                if (endIndex != -1) {
+                    String imei = sentence.substring(beginIndex, endIndex);
+                    DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
+                    if (deviceSession != null) {
+                        if (channel != null) {
+                            send(channel, remoteAddress, "$FRSES," + channel.id().asShortText());
+                        }
+                    } else {
+                        send(channel, remoteAddress, "$FRERR,AuthError,Unknown device");
+                    }
+                } else {
+                    send(channel, remoteAddress, "$FRERR,AuthError,Parse error");
+                }
+            } else {
+                send(channel, remoteAddress, "$FRERR,AuthError,Parse error");
+            }
+
+        } else if (sentence.startsWith("$FRVER,")) {
+
+            send(channel, remoteAddress, "$FRVER,1,0,GpsGate Server 1.0");
+
+        } else if (sentence.startsWith("$GPRMC,")) {
+
+            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+            if (deviceSession == null) {
+                return null;
+            }
+
+            Parser parser = new Parser(PATTERN_GPRMC, sentence);
+            if (!parser.matches()) {
+                return null;
+            }
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            DateBuilder dateBuilder = new DateBuilder()
+                    .setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+
+            position.setValid(parser.next().equals("A"));
+            position.setLatitude(parser.nextCoordinate());
+            position.setLongitude(parser.nextCoordinate());
+            position.setSpeed(parser.nextDouble(0));
+            position.setCourse(parser.nextDouble(0));
+
+            dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+            position.setTime(dateBuilder.getDate());
+
+            return position;
+
+        } else if (sentence.startsWith("$FRCMD,")) {
+
+            Parser parser = new Parser(PATTERN_FRCMD, sentence);
+            if (!parser.matches()) {
+                return null;
+            }
+
+            Position position = new Position(getProtocolName());
+
+            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+            if (deviceSession == null) {
+                return null;
+            }
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            position.setLatitude(parser.nextCoordinate());
+            position.setLongitude(parser.nextCoordinate());
+            position.setAltitude(parser.nextDouble(0));
+            position.setSpeed(parser.nextDouble(0));
+            position.setCourse(parser.nextDouble(0));
+
+            position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
+
+            position.setValid(parser.next().equals("1"));
+
+            return position;
+
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/GpsMarkerProtocol.java b/src/main/java/org/traccar/protocol/GpsMarkerProtocol.java
new file mode 100644
index 000000000..ad23ece48
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/GpsMarkerProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.CharacterDelimiterFrameDecoder;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class GpsMarkerProtocol extends BaseProtocol {
+
+    public GpsMarkerProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, "\r"));
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new GpsMarkerProtocolDecoder(GpsMarkerProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/GpsMarkerProtocolDecoder.java b/src/main/java/org/traccar/protocol/GpsMarkerProtocolDecoder.java
new file mode 100644
index 000000000..bbb2c31e2
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/GpsMarkerProtocolDecoder.java
@@ -0,0 +1,90 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class GpsMarkerProtocolDecoder extends BaseProtocolDecoder {
+
+    public GpsMarkerProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("$GM")
+            .number("d")                         // type
+            .number("(?:xx)?")                   // index
+            .number("(d{15})")                   // imei
+            .number("T(dd)(dd)(dd)")             // date (ddmmyy)
+            .number("(dd)(dd)(dd)?")             // time (hhmmss)
+            .expression("([NS])")
+            .number("(dd)(dd)(dddd)")            // latitude
+            .expression("([EW])")
+            .number("(ddd)(dd)(dddd)")           // longitude
+            .number("(ddd)")                     // speed
+            .number("(ddd)")                     // course
+            .number("(x)")                       // satellites
+            .number("(dd)")                      // battery
+            .number("(d)")                       // input
+            .number("(d)")                       // output
+            .number("(ddd)")                     // temperature
+            .any()
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
+
+        position.setValid(true);
+        position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN_MIN));
+        position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN_MIN));
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
+
+        position.set(Position.KEY_SATELLITES, parser.nextHexInt(0));
+        position.set(Position.KEY_BATTERY_LEVEL, parser.nextInt(0));
+        position.set(Position.KEY_INPUT, parser.next());
+        position.set(Position.KEY_OUTPUT, parser.next());
+        position.set(Position.PREFIX_TEMP + 1, parser.next());
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/GpsmtaProtocol.java b/src/main/java/org/traccar/protocol/GpsmtaProtocol.java
new file mode 100644
index 000000000..ce6cc5929
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/GpsmtaProtocol.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class GpsmtaProtocol extends BaseProtocol {
+
+    public GpsmtaProtocol() {
+        addServer(new TrackerServer(true, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new GpsmtaProtocolDecoder(GpsmtaProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/GpsmtaProtocolDecoder.java b/src/main/java/org/traccar/protocol/GpsmtaProtocolDecoder.java
new file mode 100644
index 000000000..31f9401b4
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/GpsmtaProtocolDecoder.java
@@ -0,0 +1,92 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.Date;
+import java.util.regex.Pattern;
+
+public class GpsmtaProtocolDecoder extends BaseProtocolDecoder {
+
+    public GpsmtaProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .expression("([^ ]+) ")              // uid
+            .number("(d+) ")                     // time (unix time)
+            .number("(-?d+.d+) ")                // latitude
+            .number("(-?d+.d+) ")                // longitude
+            .number("(d+) ")                     // speed
+            .number("(d+) ")                     // course
+            .number("(d+) ")                     // accuracy
+            .number("(d+) ")                     // altitude
+            .number("(d+) ")                     // flags
+            .number("(d+) ")                     // battery
+            .number("(d+) ")                     // temperature
+            .number("(d)")                       // charging status
+            .any()
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        String time = parser.next();
+        position.setTime(new Date(Long.parseLong(time) * 1000));
+
+        position.setLatitude(parser.nextDouble());
+        position.setLongitude(parser.nextDouble());
+        position.setSpeed(parser.nextInt());
+        position.setCourse(parser.nextInt());
+        position.setAccuracy(parser.nextInt());
+        position.setAltitude(parser.nextInt());
+
+        position.set(Position.KEY_STATUS, parser.nextInt());
+        position.set(Position.KEY_BATTERY_LEVEL, parser.nextInt());
+        position.set(Position.PREFIX_TEMP + 1, parser.nextInt());
+        position.set(Position.KEY_CHARGE, parser.nextInt() == 1);
+
+        if (channel != null) {
+            channel.writeAndFlush(new NetworkMessage(time, remoteAddress));
+        }
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/GranitFrameDecoder.java b/src/main/java/org/traccar/protocol/GranitFrameDecoder.java
new file mode 100644
index 000000000..bb7f4be44
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/GranitFrameDecoder.java
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+import org.traccar.BaseFrameDecoder;
+import org.traccar.helper.BufferUtil;
+
+public class GranitFrameDecoder extends BaseFrameDecoder {
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+        int indexEnd = BufferUtil.indexOf("\r\n", buf);
+        if (indexEnd != -1) {
+            int indexTilde = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '~');
+            if (indexTilde != -1 && indexTilde < indexEnd) {
+                int length = buf.getUnsignedShortLE(indexTilde + 1);
+                indexEnd = BufferUtil.indexOf("\r\n", buf, indexTilde + 2 + length, buf.writerIndex());
+                if (indexEnd == -1) {
+                    return null;
+                }
+            }
+            ByteBuf frame = buf.readRetainedSlice(indexEnd - buf.readerIndex());
+            buf.skipBytes(2);
+            return frame;
+        }
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/GranitProtocol.java b/src/main/java/org/traccar/protocol/GranitProtocol.java
new file mode 100644
index 000000000..6785f2a2e
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/GranitProtocol.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ * Copyright 2017 - 2018 Andrey Kunitsyn (andrey@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+import org.traccar.model.Command;
+
+public class GranitProtocol extends BaseProtocol {
+
+    public GranitProtocol() {
+        setSupportedDataCommands(
+                Command.TYPE_IDENTIFICATION,
+                Command.TYPE_REBOOT_DEVICE,
+                Command.TYPE_POSITION_SINGLE);
+        setTextCommandEncoder(new GranitProtocolSmsEncoder());
+        setSupportedTextCommands(
+                Command.TYPE_REBOOT_DEVICE,
+                Command.TYPE_POSITION_PERIODIC);
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new GranitFrameDecoder());
+                pipeline.addLast(new GranitProtocolEncoder());
+                pipeline.addLast(new GranitProtocolDecoder(GranitProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/GranitProtocolDecoder.java b/src/main/java/org/traccar/protocol/GranitProtocolDecoder.java
new file mode 100644
index 000000000..8900e5b39
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/GranitProtocolDecoder.java
@@ -0,0 +1,239 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.Context;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.Checksum;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.List;
+
+public class GranitProtocolDecoder extends BaseProtocolDecoder {
+
+    private static final int HEADER_LENGTH = 6;
+
+    private double adc1Ratio;
+    private double adc2Ratio;
+    private double adc3Ratio;
+    private double adc4Ratio;
+
+    public GranitProtocolDecoder(Protocol protocol) {
+        super(protocol);
+        adc1Ratio = Context.getConfig().getDouble("granit.adc1Ratio", 1);
+        adc2Ratio = Context.getConfig().getDouble("granit.adc2Ratio", 1);
+        adc3Ratio = Context.getConfig().getDouble("granit.adc3Ratio", 1);
+        adc4Ratio = Context.getConfig().getDouble("granit.adc4Ratio", 1);
+    }
+
+    public static void appendChecksum(ByteBuf buffer, int length) {
+        buffer.writeByte('*');
+        int checksum = Checksum.xor(buffer.nioBuffer(0, length)) & 0xFF;
+        String checksumString = String.format("%02X", checksum);
+        buffer.writeBytes(checksumString.getBytes(StandardCharsets.US_ASCII));
+        buffer.writeByte('\r'); buffer.writeByte('\n');
+    }
+
+    private static void sendResponseCurrent(Channel channel, int deviceId, long time) {
+        ByteBuf response = Unpooled.buffer();
+        response.writeBytes("BB+UGRC~".getBytes(StandardCharsets.US_ASCII));
+        response.writeShortLE(6); // length
+        response.writeInt((int) time);
+        response.writeShortLE(deviceId);
+        appendChecksum(response, 16);
+        channel.writeAndFlush(new NetworkMessage(response, channel.remoteAddress()));
+    }
+
+    private static void sendResponseArchive(Channel channel, int deviceId, int packNum) {
+        ByteBuf response = Unpooled.buffer();
+        response.writeBytes("BB+ARCF~".getBytes(StandardCharsets.US_ASCII));
+        response.writeShortLE(4); // length
+        response.writeShortLE(packNum);
+        response.writeShortLE(deviceId);
+        appendChecksum(response, 14);
+        channel.writeAndFlush(new NetworkMessage(response, channel.remoteAddress()));
+    }
+
+    private void decodeStructure(ByteBuf buf, Position position) {
+        short flags = buf.readUnsignedByte();
+        position.setValid(BitUtil.check(flags, 7));
+        if (BitUtil.check(flags, 1)) {
+            position.set(Position.KEY_ALARM, Position.ALARM_GENERAL);
+        }
+
+        short satDel = buf.readUnsignedByte();
+        position.set(Position.KEY_SATELLITES, BitUtil.from(satDel, 4));
+
+        int pdop = BitUtil.to(satDel, 4);
+        position.set(Position.KEY_PDOP, pdop);
+
+        int lonDegrees = buf.readUnsignedByte();
+        int latDegrees = buf.readUnsignedByte();
+        int lonMinutes = buf.readUnsignedShortLE();
+        int latMinutes = buf.readUnsignedShortLE();
+
+        double latitude = latDegrees + latMinutes / 60000.0;
+        double longitude = lonDegrees + lonMinutes / 60000.0;
+
+        if (position.getValid()) {
+            if (!BitUtil.check(flags, 4)) {
+                latitude = -latitude;
+            }
+            if (!BitUtil.check(flags, 5)) {
+                longitude = -longitude;
+            }
+        }
+
+        position.setLongitude(longitude);
+        position.setLatitude(latitude);
+
+        position.setSpeed(buf.readUnsignedByte());
+
+        int course = buf.readUnsignedByte();
+        if (BitUtil.check(flags, 6)) {
+            course = course | 0x100;
+        }
+        position.setCourse(course);
+
+        position.set(Position.KEY_DISTANCE, buf.readShortLE());
+
+        int analogIn1 = buf.readUnsignedByte();
+        int analogIn2 = buf.readUnsignedByte();
+        int analogIn3 = buf.readUnsignedByte();
+        int analogIn4 = buf.readUnsignedByte();
+
+        int analogInHi = buf.readUnsignedByte();
+
+        analogIn1 = analogInHi << 8 & 0x300 | analogIn1;
+        analogIn2 = analogInHi << 6 & 0x300 | analogIn2;
+        analogIn3 = analogInHi << 4 & 0x300 | analogIn3;
+        analogIn4 = analogInHi << 2 & 0x300 | analogIn4;
+
+        position.set(Position.PREFIX_ADC + 1, analogIn1 * adc1Ratio);
+        position.set(Position.PREFIX_ADC + 2, analogIn2 * adc2Ratio);
+        position.set(Position.PREFIX_ADC + 3, analogIn3 * adc3Ratio);
+        position.set(Position.PREFIX_ADC + 4, analogIn4 * adc4Ratio);
+
+        position.setAltitude(buf.readUnsignedByte() * 10);
+
+        int output = buf.readUnsignedByte();
+        for (int i = 0; i < 8; i++) {
+            position.set(Position.PREFIX_IO + (i + 1), BitUtil.check(output, i));
+        }
+        buf.readUnsignedByte(); // status message buffer
+    }
+
+    @Override
+    protected Object decode(Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        int indexTilde = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '~');
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+
+        if (deviceSession != null && indexTilde == -1) {
+            String bufString = buf.toString(StandardCharsets.US_ASCII);
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            position.setTime(new Date());
+            getLastLocation(position, new Date());
+            position.setValid(false);
+            position.set(Position.KEY_RESULT, bufString);
+            return position;
+        }
+
+        if (buf.readableBytes() < HEADER_LENGTH) {
+            return null;
+        }
+        String header = buf.readSlice(HEADER_LENGTH).toString(StandardCharsets.US_ASCII);
+
+        if (header.equals("+RRCB~")) {
+
+            buf.skipBytes(2); // binary length 26
+            int deviceId = buf.readUnsignedShortLE();
+            deviceSession = getDeviceSession(channel, remoteAddress, String.valueOf(deviceId));
+            if (deviceSession == null) {
+                return null;
+            }
+            long unixTime = buf.readUnsignedIntLE();
+            if (channel != null) {
+                sendResponseCurrent(channel, deviceId, unixTime);
+            }
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            position.setTime(new Date(unixTime * 1000));
+
+            decodeStructure(buf, position);
+            return position;
+
+        } else if (header.equals("+DDAT~")) {
+
+            buf.skipBytes(2); // binary length
+            int deviceId = buf.readUnsignedShortLE();
+            deviceSession = getDeviceSession(channel, remoteAddress, String.valueOf(deviceId));
+            if (deviceSession == null) {
+                return null;
+            }
+            byte format = buf.readByte();
+            if (format != 4) {
+                return null;
+            }
+            byte nblocks = buf.readByte();
+            int packNum = buf.readUnsignedShortLE();
+            if (channel != null) {
+                sendResponseArchive(channel, deviceId, packNum);
+            }
+            List<Position> positions = new ArrayList<>();
+            while (nblocks > 0) {
+                nblocks--;
+                long unixTime = buf.readUnsignedIntLE();
+                int timeIncrement = buf.getUnsignedShortLE(buf.readerIndex() + 120);
+                for (int i = 0; i < 6; i++) {
+                    if (buf.getUnsignedByte(buf.readerIndex()) != 0xFE) {
+                        Position position = new Position(getProtocolName());
+                        position.setDeviceId(deviceSession.getDeviceId());
+                        position.setTime(new Date((unixTime + i * timeIncrement) * 1000));
+                        decodeStructure(buf, position);
+                        position.set(Position.KEY_ARCHIVE, true);
+                        positions.add(position);
+                    } else {
+                        buf.skipBytes(20); // skip filled 0xFE structure
+                    }
+                }
+                buf.skipBytes(2); // increment
+            }
+            return positions;
+
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/GranitProtocolEncoder.java b/src/main/java/org/traccar/protocol/GranitProtocolEncoder.java
new file mode 100644
index 000000000..6345ff971
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/GranitProtocolEncoder.java
@@ -0,0 +1,48 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import java.nio.charset.StandardCharsets;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import org.traccar.BaseProtocolEncoder;
+import org.traccar.model.Command;
+
+public class GranitProtocolEncoder extends BaseProtocolEncoder {
+
+    private ByteBuf encodeCommand(String commandString) {
+        ByteBuf buffer = Unpooled.buffer();
+        buffer.writeBytes(commandString.getBytes(StandardCharsets.US_ASCII));
+        GranitProtocolDecoder.appendChecksum(buffer, commandString.length());
+        return buffer;
+    }
+
+    @Override
+    protected Object encodeCommand(Command command) {
+        switch (command.getType()) {
+            case Command.TYPE_IDENTIFICATION:
+                return encodeCommand("BB+IDNT");
+            case Command.TYPE_REBOOT_DEVICE:
+                return encodeCommand("BB+RESET");
+            case Command.TYPE_POSITION_SINGLE:
+                return encodeCommand("BB+RRCD");
+            default:
+                return null;
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/GranitProtocolSmsEncoder.java b/src/main/java/org/traccar/protocol/GranitProtocolSmsEncoder.java
new file mode 100644
index 000000000..7d5518c17
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/GranitProtocolSmsEncoder.java
@@ -0,0 +1,36 @@
+/*
+ * Copyright 2017 Anton Tananaev (anton@traccar.org)
+ * Copyright 2017 Andrey Kunitsyn (andrey@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.StringProtocolEncoder;
+import org.traccar.model.Command;
+
+public class GranitProtocolSmsEncoder extends StringProtocolEncoder {
+
+    @Override
+    protected String encodeCommand(Command command) {
+        switch (command.getType()) {
+        case Command.TYPE_REBOOT_DEVICE:
+            return "BB+RESET";
+        case Command.TYPE_POSITION_PERIODIC:
+            return formatCommand(command, "BB+BBMD={%s}", Command.KEY_FREQUENCY);
+        default:
+            return null;
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Gt02Protocol.java b/src/main/java/org/traccar/protocol/Gt02Protocol.java
new file mode 100644
index 000000000..f412ee720
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Gt02Protocol.java
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LengthFieldBasedFrameDecoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class Gt02Protocol extends BaseProtocol {
+
+    public Gt02Protocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LengthFieldBasedFrameDecoder(256, 2, 1, 2, 0));
+                pipeline.addLast(new Gt02ProtocolDecoder(Gt02Protocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Gt02ProtocolDecoder.java b/src/main/java/org/traccar/protocol/Gt02ProtocolDecoder.java
new file mode 100644
index 000000000..78a3fd3ee
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Gt02ProtocolDecoder.java
@@ -0,0 +1,125 @@
+/*
+ * Copyright 2012 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.ByteBufUtil;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+
+public class Gt02ProtocolDecoder extends BaseProtocolDecoder {
+
+    public Gt02ProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    public static final int MSG_DATA = 0x10;
+    public static final int MSG_HEARTBEAT = 0x1A;
+    public static final int MSG_RESPONSE = 0x1C;
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        buf.skipBytes(2); // header
+        buf.readByte(); // size
+
+        Position position = new Position(getProtocolName());
+
+        // Zero for location messages
+        int power = buf.readUnsignedByte();
+        int gsm = buf.readUnsignedByte();
+
+        String imei = ByteBufUtil.hexDump(buf.readSlice(8)).substring(1);
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.set(Position.KEY_INDEX, buf.readUnsignedShort());
+
+        int type = buf.readUnsignedByte();
+
+        if (type == MSG_HEARTBEAT) {
+
+            getLastLocation(position, null);
+
+            position.set(Position.KEY_POWER, power);
+            position.set(Position.KEY_RSSI, gsm);
+
+            if (channel != null) {
+                byte[] response = {0x54, 0x68, 0x1A, 0x0D, 0x0A};
+                channel.writeAndFlush(new NetworkMessage(Unpooled.wrappedBuffer(response), remoteAddress));
+            }
+
+        } else if (type == MSG_DATA) {
+
+            DateBuilder dateBuilder = new DateBuilder()
+                    .setDate(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte())
+                    .setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte());
+            position.setTime(dateBuilder.getDate());
+
+            double latitude = buf.readUnsignedInt() / (60.0 * 30000.0);
+            double longitude = buf.readUnsignedInt() / (60.0 * 30000.0);
+
+            position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte()));
+            position.setCourse(buf.readUnsignedShort());
+
+            buf.skipBytes(3); // reserved
+
+            long flags = buf.readUnsignedInt();
+            position.setValid(BitUtil.check(flags, 0));
+            if (!BitUtil.check(flags, 1)) {
+                latitude = -latitude;
+            }
+            if (!BitUtil.check(flags, 2)) {
+                longitude = -longitude;
+            }
+
+            position.setLatitude(latitude);
+            position.setLongitude(longitude);
+
+        } else if (type == MSG_RESPONSE) {
+
+            getLastLocation(position, null);
+
+            position.set(Position.KEY_RESULT,
+                    buf.readSlice(buf.readUnsignedByte()).toString(StandardCharsets.US_ASCII));
+
+        } else {
+
+            return null;
+
+        }
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Gt06FrameDecoder.java b/src/main/java/org/traccar/protocol/Gt06FrameDecoder.java
new file mode 100644
index 000000000..cc934be42
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Gt06FrameDecoder.java
@@ -0,0 +1,56 @@
+/*
+ * Copyright 2014 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+import org.traccar.BaseFrameDecoder;
+
+public class Gt06FrameDecoder extends BaseFrameDecoder {
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+        if (buf.readableBytes() < 5) {
+            return null;
+        }
+
+        int length = 2 + 2; // head and tail
+
+        if (buf.getByte(buf.readerIndex()) == 0x78) {
+            length += 1 + buf.getUnsignedByte(buf.readerIndex() + 2);
+        } else {
+            length += 2 + buf.getUnsignedShort(buf.readerIndex() + 2);
+        }
+
+        if (buf.readableBytes() >= length && buf.getUnsignedShort(buf.readerIndex() + length - 2) == 0x0d0a) {
+            return buf.readRetainedSlice(length);
+        }
+
+        int endIndex = buf.readerIndex() - 1;
+        do {
+            endIndex = buf.indexOf(endIndex + 1, buf.writerIndex(), (byte) 0x0d);
+            if (endIndex > 0 && buf.writerIndex() > endIndex + 1 && buf.getByte(endIndex + 1) == 0x0a) {
+                return buf.readRetainedSlice(endIndex + 2 - buf.readerIndex());
+            }
+        } while (endIndex > 0);
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Gt06Protocol.java b/src/main/java/org/traccar/protocol/Gt06Protocol.java
new file mode 100644
index 000000000..6e5435cd4
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Gt06Protocol.java
@@ -0,0 +1,40 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+import org.traccar.model.Command;
+
+public class Gt06Protocol extends BaseProtocol {
+
+    public Gt06Protocol() {
+        setSupportedDataCommands(
+                Command.TYPE_ENGINE_STOP,
+                Command.TYPE_ENGINE_RESUME,
+                Command.TYPE_CUSTOM);
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new Gt06FrameDecoder());
+                pipeline.addLast(new Gt06ProtocolEncoder());
+                pipeline.addLast(new Gt06ProtocolDecoder(Gt06Protocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Gt06ProtocolDecoder.java b/src/main/java/org/traccar/protocol/Gt06ProtocolDecoder.java
new file mode 100644
index 000000000..1f8fb66dd
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Gt06ProtocolDecoder.java
@@ -0,0 +1,929 @@
+/*
+ * Copyright 2012 - 2019 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.ByteBufUtil;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.Context;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.BcdUtil;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.Checksum;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.CellTower;
+import org.traccar.model.Device;
+import org.traccar.model.Network;
+import org.traccar.model.Position;
+import org.traccar.model.WifiAccessPoint;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.Calendar;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.TimeZone;
+import java.util.regex.Pattern;
+
+public class Gt06ProtocolDecoder extends BaseProtocolDecoder {
+
+    private final Map<Integer, ByteBuf> photos = new HashMap<>();
+
+    public Gt06ProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    public static final int MSG_LOGIN = 0x01;
+    public static final int MSG_GPS = 0x10;
+    public static final int MSG_LBS = 0x11;
+    public static final int MSG_GPS_LBS_1 = 0x12;
+    public static final int MSG_GPS_LBS_2 = 0x22;
+    public static final int MSG_STATUS = 0x13;
+    public static final int MSG_SATELLITE = 0x14;
+    public static final int MSG_STRING = 0x15;
+    public static final int MSG_GPS_LBS_STATUS_1 = 0x16;
+    public static final int MSG_WIFI = 0x17;
+    public static final int MSG_GPS_LBS_STATUS_2 = 0x26;
+    public static final int MSG_GPS_LBS_STATUS_3 = 0x27;
+    public static final int MSG_LBS_MULTIPLE = 0x28;
+    public static final int MSG_LBS_WIFI = 0x2C;
+    public static final int MSG_LBS_EXTEND = 0x18;
+    public static final int MSG_LBS_STATUS = 0x19;
+    public static final int MSG_GPS_PHONE = 0x1A;
+    public static final int MSG_GPS_LBS_EXTEND = 0x1E;
+    public static final int MSG_HEARTBEAT = 0x23;
+    public static final int MSG_ADDRESS_REQUEST = 0x2A;
+    public static final int MSG_ADDRESS_RESPONSE = 0x97;
+    public static final int MSG_AZ735_GPS = 0x32;
+    public static final int MSG_AZ735_ALARM = 0x33;
+    public static final int MSG_X1_GPS = 0x34;
+    public static final int MSG_X1_PHOTO_INFO = 0x35;
+    public static final int MSG_X1_PHOTO_DATA = 0x36;
+    public static final int MSG_WIFI_2 = 0x69;
+    public static final int MSG_COMMAND_0 = 0x80;
+    public static final int MSG_COMMAND_1 = 0x81;
+    public static final int MSG_COMMAND_2 = 0x82;
+    public static final int MSG_TIME_REQUEST = 0x8A;
+    public static final int MSG_INFO = 0x94;
+    public static final int MSG_STRING_INFO = 0x21;
+    public static final int MSG_GPS_2 = 0xA0;
+    public static final int MSG_LBS_2 = 0xA1;
+    public static final int MSG_WIFI_3 = 0xA2;
+    public static final int MSG_FENCE_SINGLE = 0xA3;
+    public static final int MSG_FENCE_MULTI = 0xA4;
+    public static final int MSG_LBS_ALARM = 0xA5;
+    public static final int MSG_LBS_ADDRESS = 0xA7;
+    public static final int MSG_OBD = 0x8C;
+    public static final int MSG_DTC = 0x65;
+    public static final int MSG_PID = 0x66;
+
+    private static boolean isSupported(int type) {
+        return hasGps(type) || hasLbs(type) || hasStatus(type);
+    }
+
+    private static boolean hasGps(int type) {
+        switch (type) {
+            case MSG_GPS:
+            case MSG_GPS_LBS_1:
+            case MSG_GPS_LBS_2:
+            case MSG_GPS_LBS_STATUS_1:
+            case MSG_GPS_LBS_STATUS_2:
+            case MSG_GPS_LBS_STATUS_3:
+            case MSG_GPS_PHONE:
+            case MSG_GPS_LBS_EXTEND:
+            case MSG_GPS_2:
+            case MSG_FENCE_SINGLE:
+            case MSG_FENCE_MULTI:
+                return true;
+            default:
+                return false;
+        }
+    }
+
+    private static boolean hasLbs(int type) {
+        switch (type) {
+            case MSG_LBS:
+            case MSG_LBS_STATUS:
+            case MSG_GPS_LBS_1:
+            case MSG_GPS_LBS_2:
+            case MSG_GPS_LBS_STATUS_1:
+            case MSG_GPS_LBS_STATUS_2:
+            case MSG_GPS_LBS_STATUS_3:
+            case MSG_GPS_2:
+            case MSG_FENCE_SINGLE:
+            case MSG_FENCE_MULTI:
+            case MSG_LBS_ALARM:
+            case MSG_LBS_ADDRESS:
+                return true;
+            default:
+                return false;
+        }
+    }
+
+    private static boolean hasStatus(int type) {
+        switch (type) {
+            case MSG_STATUS:
+            case MSG_LBS_STATUS:
+            case MSG_GPS_LBS_STATUS_1:
+            case MSG_GPS_LBS_STATUS_2:
+            case MSG_GPS_LBS_STATUS_3:
+                return true;
+            default:
+                return false;
+        }
+    }
+
+    private static boolean hasLanguage(int type) {
+        switch (type) {
+            case MSG_GPS_PHONE:
+            case MSG_HEARTBEAT:
+            case MSG_GPS_LBS_STATUS_3:
+            case MSG_LBS_MULTIPLE:
+            case MSG_LBS_2:
+            case MSG_FENCE_MULTI:
+                return true;
+            default:
+                return false;
+        }
+    }
+
+    private void sendResponse(Channel channel, boolean extended, int type, int index, ByteBuf content) {
+        if (channel != null) {
+            ByteBuf response = Unpooled.buffer();
+            int length = 5 + (content != null ? content.readableBytes() : 0);
+            if (extended) {
+                response.writeShort(0x7979);
+                response.writeShort(length);
+            } else {
+                response.writeShort(0x7878);
+                response.writeByte(length);
+            }
+            response.writeByte(type);
+            if (content != null) {
+                response.writeBytes(content);
+                content.release();
+            }
+            response.writeShort(index);
+            response.writeShort(Checksum.crc16(Checksum.CRC16_X25,
+                    response.nioBuffer(2, response.writerIndex() - 2)));
+            response.writeByte('\r'); response.writeByte('\n'); // ending
+            channel.writeAndFlush(new NetworkMessage(response, channel.remoteAddress()));
+        }
+    }
+
+    private void sendPhotoRequest(Channel channel, int pictureId) {
+        ByteBuf photo = photos.get(pictureId);
+        ByteBuf content = Unpooled.buffer();
+        content.writeInt(pictureId);
+        content.writeInt(photo.writerIndex());
+        content.writeShort(Math.min(photo.writableBytes(), 1024));
+        sendResponse(channel, false, MSG_X1_PHOTO_DATA, 0, content);
+    }
+
+    private boolean decodeGps(Position position, ByteBuf buf, boolean hasLength, TimeZone timezone) {
+
+        DateBuilder dateBuilder = new DateBuilder(timezone)
+                .setDate(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte())
+                .setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte());
+        position.setTime(dateBuilder.getDate());
+
+        if (hasLength && buf.readUnsignedByte() == 0) {
+            return false;
+        }
+
+        position.set(Position.KEY_SATELLITES, BitUtil.to(buf.readUnsignedByte(), 4));
+
+        double latitude = buf.readUnsignedInt() / 60.0 / 30000.0;
+        double longitude = buf.readUnsignedInt() / 60.0 / 30000.0;
+        position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte()));
+
+        int flags = buf.readUnsignedShort();
+        position.setCourse(BitUtil.to(flags, 10));
+        position.setValid(BitUtil.check(flags, 12));
+
+        if (!BitUtil.check(flags, 10)) {
+            latitude = -latitude;
+        }
+        if (BitUtil.check(flags, 11)) {
+            longitude = -longitude;
+        }
+
+        position.setLatitude(latitude);
+        position.setLongitude(longitude);
+
+        if (BitUtil.check(flags, 14)) {
+            position.set(Position.KEY_IGNITION, BitUtil.check(flags, 15));
+        }
+
+        return true;
+    }
+
+    private boolean decodeLbs(Position position, ByteBuf buf, boolean hasLength) {
+
+        int length = 0;
+        if (hasLength) {
+            length = buf.readUnsignedByte();
+            if (length == 0) {
+                return false;
+            }
+        }
+
+        int mcc = buf.readUnsignedShort();
+        int mnc = BitUtil.check(mcc, 15) ? buf.readUnsignedShort() : buf.readUnsignedByte();
+
+        position.setNetwork(new Network(CellTower.from(
+                BitUtil.to(mcc, 15), mnc, buf.readUnsignedShort(), buf.readUnsignedMedium())));
+
+        if (length > 9) {
+            buf.skipBytes(length - 9);
+        }
+
+        return true;
+    }
+
+    private boolean decodeStatus(Position position, ByteBuf buf) {
+
+        int status = buf.readUnsignedByte();
+
+        position.set(Position.KEY_STATUS, status);
+        position.set(Position.KEY_IGNITION, BitUtil.check(status, 1));
+        position.set(Position.KEY_CHARGE, BitUtil.check(status, 2));
+        position.set(Position.KEY_BLOCKED, BitUtil.check(status, 7));
+
+        switch (BitUtil.between(status, 3, 6)) {
+            case 1:
+                position.set(Position.KEY_ALARM, Position.ALARM_SHOCK);
+                break;
+            case 2:
+                position.set(Position.KEY_ALARM, Position.ALARM_POWER_CUT);
+                break;
+            case 3:
+                position.set(Position.KEY_ALARM, Position.ALARM_LOW_BATTERY);
+                break;
+            case 4:
+                position.set(Position.KEY_ALARM, Position.ALARM_SOS);
+                break;
+            case 7:
+                position.set(Position.KEY_ALARM, Position.ALARM_REMOVING);
+                break;
+            default:
+                break;
+        }
+
+        position.set(Position.KEY_BATTERY_LEVEL, buf.readUnsignedByte() * 100 / 6);
+        position.set(Position.KEY_RSSI, buf.readUnsignedByte());
+        position.set(Position.KEY_ALARM, decodeAlarm(buf.readUnsignedByte()));
+
+        return true;
+    }
+
+    private String decodeAlarm(short value) {
+        switch (value) {
+            case 0x01:
+                return Position.ALARM_SOS;
+            case 0x02:
+                return Position.ALARM_POWER_CUT;
+            case 0x03:
+            case 0x09:
+                return Position.ALARM_VIBRATION;
+            case 0x04:
+                return Position.ALARM_GEOFENCE_ENTER;
+            case 0x05:
+                return Position.ALARM_GEOFENCE_EXIT;
+            case 0x06:
+                return Position.ALARM_OVERSPEED;
+            case 0x0E:
+            case 0x0F:
+                return Position.ALARM_LOW_BATTERY;
+            case 0x11:
+                return Position.ALARM_POWER_OFF;
+            case 0x13:
+                return Position.ALARM_TAMPERING;
+            case 0x14:
+                return Position.ALARM_DOOR;
+            case 0x29:
+                return Position.ALARM_ACCELERATION;
+            case 0x30:
+                return Position.ALARM_BRAKING;
+            case 0x2A:
+            case 0x2B:
+                return Position.ALARM_CORNERING;
+            case 0x2C:
+                return Position.ALARM_ACCIDENT;
+            case 0x23:
+                return Position.ALARM_FALL_DOWN;
+            default:
+                return null;
+        }
+    }
+
+    private static final Pattern PATTERN_FUEL = new PatternBuilder()
+            .text("!AIOIL,")
+            .number("d+,")                       // device address
+            .number("d+.d+,")                    // output value
+            .number("(d+.d+),")                  // temperature
+            .expression("[^,]+,")                // version
+            .number("dd")                        // back wave
+            .number("d")                         // software status code
+            .number("d,")                        // hardware status code
+            .number("(d+.d+),")                  // measured value
+            .expression("[01],")                 // movement status
+            .number("d+,")                       // excited wave times
+            .number("xx")                        // checksum
+            .compile();
+
+    private Position decodeFuelData(Position position, String sentence) {
+        Parser parser = new Parser(PATTERN_FUEL, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        position.set(Position.PREFIX_TEMP + 1, parser.nextDouble(0));
+        position.set(Position.KEY_FUEL_LEVEL, parser.nextDouble(0));
+
+        return position;
+    }
+
+    private static final Pattern PATTERN_LOCATION = new PatternBuilder()
+            .text("Current position!")
+            .number("Lat:([NS])(d+.d+),")        // latitude
+            .number("Lon:([EW])(d+.d+),")        // longitude
+            .text("Course:").number("(d+.d+),")  // course
+            .text("Speed:").number("(d+.d+),")   // speed
+            .text("DateTime:")
+            .number("(dddd)-(dd)-(dd) +")        // date
+            .number("(dd):(dd):(dd)")            // time
+            .compile();
+
+    private Position decodeLocationString(Position position, String sentence) {
+        Parser parser = new Parser(PATTERN_LOCATION, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        position.setValid(true);
+        position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG));
+        position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG));
+        position.setCourse(parser.nextDouble());
+        position.setSpeed(parser.nextDouble());
+        position.setTime(parser.nextDateTime(Parser.DateTimeFormat.YMD_HMS));
+
+        return position;
+    }
+
+    private Object decodeBasic(Channel channel, SocketAddress remoteAddress, ByteBuf buf) {
+
+        int length = buf.readUnsignedByte();
+        int dataLength = length - 5;
+        int type = buf.readUnsignedByte();
+
+        DeviceSession deviceSession = null;
+        if (type != MSG_LOGIN) {
+            deviceSession = getDeviceSession(channel, remoteAddress);
+            if (deviceSession == null) {
+                return null;
+            }
+            if (deviceSession.getTimeZone() == null) {
+                deviceSession.setTimeZone(getTimeZone(deviceSession.getDeviceId()));
+            }
+        }
+
+        if (type == MSG_LOGIN) {
+
+            String imei = ByteBufUtil.hexDump(buf.readSlice(8)).substring(1);
+            buf.readUnsignedShort(); // type
+
+            deviceSession = getDeviceSession(channel, remoteAddress, imei);
+            if (deviceSession != null && deviceSession.getTimeZone() == null) {
+                deviceSession.setTimeZone(getTimeZone(deviceSession.getDeviceId()));
+            }
+
+            if (dataLength > 10) {
+                int extensionBits = buf.readUnsignedShort();
+                int hours = (extensionBits >> 4) / 100;
+                int minutes = (extensionBits >> 4) % 100;
+                int offset = (hours * 60 + minutes) * 60;
+                if ((extensionBits & 0x8) != 0) {
+                    offset = -offset;
+                }
+                if (deviceSession != null) {
+                    TimeZone timeZone = deviceSession.getTimeZone();
+                    if (timeZone.getRawOffset() == 0) {
+                        timeZone.setRawOffset(offset * 1000);
+                        deviceSession.setTimeZone(timeZone);
+                    }
+                }
+
+            }
+
+            if (deviceSession != null) {
+                sendResponse(channel, false, type, buf.getShort(buf.writerIndex() - 6), null);
+            }
+
+        } else if (type == MSG_HEARTBEAT) {
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            getLastLocation(position, null);
+
+            int status = buf.readUnsignedByte();
+            position.set(Position.KEY_ARMED, BitUtil.check(status, 0));
+            position.set(Position.KEY_IGNITION, BitUtil.check(status, 1));
+            position.set(Position.KEY_CHARGE, BitUtil.check(status, 2));
+
+            if (buf.readableBytes() >= 2 + 6) {
+                position.set(Position.KEY_BATTERY, buf.readUnsignedShort() * 0.01);
+            }
+            if (buf.readableBytes() >= 1 + 6) {
+                position.set(Position.KEY_RSSI, buf.readUnsignedByte());
+            }
+
+            sendResponse(channel, false, type, buf.getShort(buf.writerIndex() - 6), null);
+
+            return position;
+
+        } else if (type == MSG_ADDRESS_REQUEST) {
+
+            String response = "NA&&NA&&0##";
+            ByteBuf content = Unpooled.buffer();
+            content.writeByte(response.length());
+            content.writeInt(0);
+            content.writeBytes(response.getBytes(StandardCharsets.US_ASCII));
+            sendResponse(channel, true, MSG_ADDRESS_RESPONSE, 0, content);
+
+        } else if (type == MSG_TIME_REQUEST) {
+
+            Calendar calendar = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
+            ByteBuf content = Unpooled.buffer();
+            content.writeByte(calendar.get(Calendar.YEAR) - 2000);
+            content.writeByte(calendar.get(Calendar.MONTH) + 1);
+            content.writeByte(calendar.get(Calendar.DAY_OF_MONTH));
+            content.writeByte(calendar.get(Calendar.HOUR_OF_DAY));
+            content.writeByte(calendar.get(Calendar.MINUTE));
+            content.writeByte(calendar.get(Calendar.SECOND));
+            sendResponse(channel, false, MSG_TIME_REQUEST, 0, content);
+
+        } else if (type == MSG_X1_GPS || type == MSG_X1_PHOTO_INFO) {
+
+            return decodeX1(channel, buf, deviceSession, type);
+
+        } else if (type == MSG_WIFI || type == MSG_WIFI_2) {
+
+            return decodeWifi(channel, buf, deviceSession, type);
+
+        } else if (type == MSG_INFO) {
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            getLastLocation(position, null);
+
+            position.set(Position.KEY_POWER, buf.readShort() * 0.01);
+
+            return position;
+
+        } else {
+
+            return decodeBasicOther(channel, buf, deviceSession, type, dataLength);
+
+        }
+
+        return null;
+    }
+
+    private Object decodeX1(Channel channel, ByteBuf buf, DeviceSession deviceSession, int type) {
+
+        if (type == MSG_X1_GPS) {
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            buf.readUnsignedInt(); // data and alarm
+
+            decodeGps(position, buf, false, deviceSession.getTimeZone());
+
+            buf.readUnsignedShort(); // terminal info
+
+            position.set(Position.KEY_ODOMETER, buf.readUnsignedInt());
+
+            position.setNetwork(new Network(CellTower.from(
+                    buf.readUnsignedShort(), buf.readUnsignedByte(),
+                    buf.readUnsignedShort(), buf.readUnsignedInt())));
+
+            long driverId = buf.readUnsignedInt();
+            if (driverId > 0) {
+                position.set(Position.KEY_DRIVER_UNIQUE_ID, String.valueOf(driverId));
+            }
+
+            position.set(Position.KEY_BATTERY, buf.readUnsignedShort() * 0.01);
+            position.set(Position.KEY_POWER, buf.readUnsignedShort() * 0.01);
+
+            return position;
+
+        } else if (type == MSG_X1_PHOTO_INFO) {
+
+            buf.skipBytes(6); // time
+            buf.readUnsignedByte(); // fix status
+            buf.readUnsignedInt(); // latitude
+            buf.readUnsignedInt(); // longitude
+            buf.readUnsignedByte(); // camera id
+            buf.readUnsignedByte(); // photo source
+            buf.readUnsignedByte(); // picture format
+
+            ByteBuf photo = Unpooled.buffer(buf.readInt());
+            int pictureId = buf.readInt();
+            photos.put(pictureId, photo);
+            sendPhotoRequest(channel, pictureId);
+
+        }
+
+        return null;
+    }
+
+    private Object decodeWifi(Channel channel, ByteBuf buf, DeviceSession deviceSession, int type) {
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        ByteBuf time = buf.readSlice(6);
+        DateBuilder dateBuilder = new DateBuilder()
+                .setYear(BcdUtil.readInteger(time, 2))
+                .setMonth(BcdUtil.readInteger(time, 2))
+                .setDay(BcdUtil.readInteger(time, 2))
+                .setHour(BcdUtil.readInteger(time, 2))
+                .setMinute(BcdUtil.readInteger(time, 2))
+                .setSecond(BcdUtil.readInteger(time, 2));
+        getLastLocation(position, dateBuilder.getDate());
+
+        Network network = new Network();
+
+        int wifiCount = buf.getByte(2);
+        for (int i = 0; i < wifiCount; i++) {
+            String mac = String.format("%02x:%02x:%02x:%02x:%02x:%02x",
+                    buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte(),
+                    buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte());
+            network.addWifiAccessPoint(WifiAccessPoint.from(mac, buf.readUnsignedByte()));
+        }
+
+        int cellCount = buf.readUnsignedByte();
+        int mcc = buf.readUnsignedShort();
+        int mnc = buf.readUnsignedByte();
+        for (int i = 0; i < cellCount; i++) {
+            network.addCellTower(CellTower.from(
+                    mcc, mnc, buf.readUnsignedShort(), buf.readUnsignedShort(), buf.readUnsignedByte()));
+        }
+
+        position.setNetwork(network);
+
+        if (channel != null) {
+            ByteBuf response = Unpooled.buffer();
+            response.writeShort(0x7878);
+            response.writeByte(0);
+            response.writeByte(type);
+            response.writeBytes(time.resetReaderIndex());
+            response.writeByte('\r');
+            response.writeByte('\n');
+            channel.writeAndFlush(new NetworkMessage(response, channel.remoteAddress()));
+        }
+
+        return position;
+    }
+
+    private Object decodeBasicOther(Channel channel, ByteBuf buf,
+            DeviceSession deviceSession, int type, int dataLength) {
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        if (type == MSG_LBS_MULTIPLE || type == MSG_LBS_EXTEND || type == MSG_LBS_WIFI
+                || type == MSG_LBS_2 || type == MSG_WIFI_3) {
+
+            boolean longFormat = type == MSG_LBS_2 || type == MSG_WIFI_3;
+
+            DateBuilder dateBuilder = new DateBuilder(deviceSession.getTimeZone())
+                    .setDate(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte())
+                    .setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte());
+
+            getLastLocation(position, dateBuilder.getDate());
+
+            int mcc = buf.readUnsignedShort();
+            int mnc = BitUtil.check(mcc, 15) ? buf.readUnsignedShort() : buf.readUnsignedByte();
+            Network network = new Network();
+            for (int i = 0; i < 7; i++) {
+                int lac = longFormat ? buf.readInt() : buf.readUnsignedShort();
+                int cid = longFormat ? (int) buf.readLong() : buf.readUnsignedMedium();
+                int rssi = -buf.readUnsignedByte();
+                if (lac > 0) {
+                    network.addCellTower(CellTower.from(BitUtil.to(mcc, 15), mnc, lac, cid, rssi));
+                }
+            }
+
+            buf.readUnsignedByte(); // time leads
+
+            if (type != MSG_LBS_MULTIPLE && type != MSG_LBS_2) {
+                int wifiCount = buf.readUnsignedByte();
+                for (int i = 0; i < wifiCount; i++) {
+                    String mac = ByteBufUtil.hexDump(buf.readSlice(6)).replaceAll("(..)", "$1:");
+                    network.addWifiAccessPoint(WifiAccessPoint.from(
+                            mac.substring(0, mac.length() - 1), buf.readUnsignedByte()));
+                }
+            }
+
+            position.setNetwork(network);
+
+        } else if (type == MSG_STRING) {
+
+            getLastLocation(position, null);
+
+            int commandLength = buf.readUnsignedByte();
+
+            if (commandLength > 0) {
+                buf.readUnsignedByte(); // server flag (reserved)
+                position.set(Position.KEY_RESULT,
+                        buf.readSlice(commandLength - 1).toString(StandardCharsets.US_ASCII));
+            }
+
+        } else if (isSupported(type)) {
+
+            if (hasGps(type)) {
+                decodeGps(position, buf, false, deviceSession.getTimeZone());
+            } else {
+                getLastLocation(position, null);
+            }
+
+            if (hasLbs(type)) {
+                decodeLbs(position, buf, hasStatus(type));
+            }
+
+            if (hasStatus(type)) {
+                decodeStatus(position, buf);
+            }
+
+            if (type == MSG_GPS_LBS_1 && buf.readableBytes() == 2 + 6) {
+                int mask = buf.readUnsignedShort();
+                position.set(Position.KEY_IGNITION, BitUtil.check(mask, 8 + 7));
+                position.set(Position.PREFIX_IN + 2, BitUtil.check(mask, 8 + 6));
+                if (BitUtil.check(mask, 8 + 4)) {
+                    int value = BitUtil.to(mask, 8 + 1);
+                    if (BitUtil.check(mask, 8 + 1)) {
+                        value = -value;
+                    }
+                    position.set(Position.PREFIX_TEMP + 1, value);
+                } else {
+                    int value = BitUtil.to(mask, 8 + 2);
+                    if (BitUtil.check(mask, 8 + 5)) {
+                        position.set(Position.PREFIX_ADC + 1, value);
+                    } else {
+                        position.set(Position.PREFIX_ADC + 1, value * 0.1);
+                    }
+                }
+            }
+
+            if (type == MSG_GPS_LBS_1 && buf.readableBytes() == 4 + 6) {
+                position.set(Position.KEY_ODOMETER, buf.readUnsignedInt());
+            }
+
+            if (type == MSG_GPS_LBS_2 && buf.readableBytes() == 3 + 6) {
+                position.set(Position.KEY_IGNITION, buf.readUnsignedByte() > 0);
+                position.set(Position.KEY_EVENT, buf.readUnsignedByte()); // reason
+                position.set(Position.KEY_ARCHIVE, buf.readUnsignedByte() > 0);
+            }
+
+        } else {
+
+            if (dataLength > 0) {
+                buf.skipBytes(dataLength);
+            }
+            if (type != MSG_COMMAND_0 && type != MSG_COMMAND_1 && type != MSG_COMMAND_2) {
+                sendResponse(channel, false, type, buf.getShort(buf.writerIndex() - 6), null);
+            }
+            return null;
+
+        }
+
+        if (hasLanguage(type)) {
+            buf.readUnsignedShort();
+        }
+
+        if (type == MSG_GPS_LBS_STATUS_3 || type == MSG_FENCE_MULTI) {
+            position.set(Position.KEY_GEOFENCE, buf.readUnsignedByte());
+        }
+
+        sendResponse(channel, false, type, buf.getShort(buf.writerIndex() - 6), null);
+
+        return position;
+    }
+
+    private Object decodeExtended(Channel channel, SocketAddress remoteAddress, ByteBuf buf) {
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        if (deviceSession.getTimeZone() == null) {
+            deviceSession.setTimeZone(getTimeZone(deviceSession.getDeviceId()));
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        buf.readUnsignedShort(); // length
+        int type = buf.readUnsignedByte();
+
+        if (type == MSG_STRING_INFO) {
+
+            buf.readUnsignedInt(); // server flag
+            String data;
+            if (buf.readUnsignedByte() == 1) {
+                data = buf.readSlice(buf.readableBytes() - 6).toString(StandardCharsets.US_ASCII);
+            } else {
+                data = buf.readSlice(buf.readableBytes() - 6).toString(StandardCharsets.UTF_16BE);
+            }
+
+            if (decodeLocationString(position, data) == null) {
+                getLastLocation(position, null);
+                position.set(Position.KEY_RESULT, data);
+            }
+
+            return position;
+
+        } else if (type == MSG_INFO) {
+
+            int subType = buf.readUnsignedByte();
+
+            getLastLocation(position, null);
+
+            if (subType == 0x00) {
+                position.set(Position.KEY_POWER, buf.readUnsignedShort() * 0.01);
+                return position;
+            } else if (subType == 0x05) {
+                int flags = buf.readUnsignedByte();
+                position.set(Position.KEY_DOOR, BitUtil.check(flags, 0));
+                position.set(Position.PREFIX_IO + 1, BitUtil.check(flags, 2));
+                return position;
+            } else if (subType == 0x0a) {
+                buf.skipBytes(8); // imei
+                buf.skipBytes(8); // imsi
+                position.set("iccid", ByteBufUtil.hexDump(buf.readSlice(8)));
+                return position;
+            } else if (subType == 0x0d) {
+                if (buf.getByte(buf.readerIndex()) != '!') {
+                    buf.skipBytes(6);
+                }
+                return decodeFuelData(position, buf.toString(
+                        buf.readerIndex(), buf.readableBytes() - 4 - 2, StandardCharsets.US_ASCII));
+            }
+
+        } else if (type == MSG_X1_PHOTO_DATA) {
+
+            int pictureId = buf.readInt();
+
+            ByteBuf photo = photos.get(pictureId);
+
+            buf.readUnsignedInt(); // offset
+            buf.readBytes(photo, buf.readUnsignedShort());
+
+            if (photo.writableBytes() > 0) {
+                sendPhotoRequest(channel, pictureId);
+            } else {
+                Device device = Context.getDeviceManager().getById(deviceSession.getDeviceId());
+                position.set(
+                        Position.KEY_IMAGE, Context.getMediaManager().writeFile(device.getUniqueId(), photo, "jpg"));
+                photos.remove(pictureId).release();
+            }
+
+        } else if (type == MSG_AZ735_GPS || type == MSG_AZ735_ALARM) {
+
+            if (!decodeGps(position, buf, true, deviceSession.getTimeZone())) {
+                getLastLocation(position, position.getDeviceTime());
+            }
+
+            if (decodeLbs(position, buf, true)) {
+                position.set(Position.KEY_RSSI, buf.readUnsignedByte());
+            }
+
+            buf.skipBytes(buf.readUnsignedByte()); // additional cell towers
+            buf.skipBytes(buf.readUnsignedByte()); // wifi access point
+
+            int status = buf.readUnsignedByte();
+            position.set(Position.KEY_STATUS, status);
+
+            if (type == MSG_AZ735_ALARM) {
+                switch (status) {
+                    case 0xA0:
+                        position.set(Position.KEY_ARMED, true);
+                        break;
+                    case 0xA1:
+                        position.set(Position.KEY_ARMED, false);
+                        break;
+                    case 0xA2:
+                    case 0xA3:
+                        position.set(Position.KEY_ALARM, Position.ALARM_LOW_BATTERY);
+                        break;
+                    case 0xA4:
+                        position.set(Position.KEY_ALARM, Position.ALARM_GENERAL);
+                        break;
+                    case 0xA5:
+                        position.set(Position.KEY_ALARM, Position.ALARM_DOOR);
+                        break;
+                    default:
+                        break;
+                }
+            }
+
+            buf.skipBytes(buf.readUnsignedByte()); // reserved extension
+
+            sendResponse(channel, true, type, buf.getShort(buf.writerIndex() - 6), null);
+
+            return position;
+
+        } else if (type == MSG_OBD) {
+
+            DateBuilder dateBuilder = new DateBuilder(deviceSession.getTimeZone())
+                    .setDate(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte())
+                    .setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte());
+
+            getLastLocation(position, dateBuilder.getDate());
+
+            position.set(Position.KEY_IGNITION, buf.readUnsignedByte() > 0);
+
+            String data = buf.readCharSequence(buf.readableBytes() - 18, StandardCharsets.US_ASCII).toString();
+            for (String pair : data.split(",")) {
+                String[] values = pair.split("=");
+                switch (Integer.parseInt(values[0].substring(0, 2), 16)) {
+                    case 40:
+                        position.set(Position.KEY_ODOMETER, Integer.parseInt(values[1], 16) * 0.01);
+                        break;
+                    case 43:
+                        position.set(Position.KEY_FUEL_LEVEL, Integer.parseInt(values[1], 16) * 0.01);
+                        break;
+                    case 45:
+                        position.set(Position.KEY_COOLANT_TEMP, Integer.parseInt(values[1], 16) * 0.01);
+                        break;
+                    case 53:
+                        position.set(Position.KEY_OBD_SPEED, Integer.parseInt(values[1], 16) * 0.01);
+                        break;
+                    case 54:
+                        position.set(Position.KEY_RPM, Integer.parseInt(values[1], 16) * 0.01);
+                        break;
+                    case 71:
+                        position.set(Position.KEY_FUEL_USED, Integer.parseInt(values[1], 16) * 0.01);
+                        break;
+                    case 73:
+                        position.set(Position.KEY_HOURS, Integer.parseInt(values[1], 16) * 0.01);
+                        break;
+                    case 74:
+                        position.set(Position.KEY_VIN, values[1]);
+                        break;
+                    default:
+                        break;
+                }
+            }
+
+            return position;
+
+        }
+
+        return null;
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        int header = buf.readShort();
+
+        if (header == 0x7878) {
+            return decodeBasic(channel, remoteAddress, buf);
+        } else if (header == 0x7979) {
+            return decodeExtended(channel, remoteAddress, buf);
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Gt06ProtocolEncoder.java b/src/main/java/org/traccar/protocol/Gt06ProtocolEncoder.java
new file mode 100644
index 000000000..05560229f
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Gt06ProtocolEncoder.java
@@ -0,0 +1,78 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import org.traccar.BaseProtocolEncoder;
+import org.traccar.Context;
+import org.traccar.helper.Checksum;
+import org.traccar.model.Command;
+
+import java.nio.charset.StandardCharsets;
+
+public class Gt06ProtocolEncoder extends BaseProtocolEncoder {
+
+    private ByteBuf encodeContent(long deviceId, String content) {
+
+        boolean language = Context.getIdentityManager().lookupAttributeBoolean(deviceId, "gt06.language", false, true);
+
+        ByteBuf buf = Unpooled.buffer();
+
+        buf.writeByte(0x78);
+        buf.writeByte(0x78);
+
+        buf.writeByte(1 + 1 + 4 + content.length() + 2 + 2 + (language ? 2 : 0)); // message length
+
+        buf.writeByte(0x80); // message type
+
+        buf.writeByte(4 + content.length()); // command length
+        buf.writeInt(0);
+        buf.writeBytes(content.getBytes(StandardCharsets.US_ASCII)); // command
+
+        if (language) {
+            buf.writeShort(2); // english language
+        }
+
+        buf.writeShort(0); // message index
+
+        buf.writeShort(Checksum.crc16(Checksum.CRC16_X25, buf.nioBuffer(2, buf.writerIndex() - 2)));
+
+        buf.writeByte('\r');
+        buf.writeByte('\n');
+
+        return buf;
+    }
+
+    @Override
+    protected Object encodeCommand(Command command) {
+
+        boolean alternative = Context.getIdentityManager().lookupAttributeBoolean(
+                command.getDeviceId(), "gt06.alternative", false, true);
+
+        switch (command.getType()) {
+            case Command.TYPE_ENGINE_STOP:
+                return encodeContent(command.getDeviceId(), alternative ? "DYD,123456#" : "Relay,1#");
+            case Command.TYPE_ENGINE_RESUME:
+                return encodeContent(command.getDeviceId(), alternative ? "HFYD,123456#" : "Relay,0#");
+            case Command.TYPE_CUSTOM:
+                return encodeContent(command.getDeviceId(), command.getString(Command.KEY_DATA));
+            default:
+                return null;
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Gt30Protocol.java b/src/main/java/org/traccar/protocol/Gt30Protocol.java
new file mode 100644
index 000000000..aa4ad20b1
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Gt30Protocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LineBasedFrameDecoder;
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class Gt30Protocol extends BaseProtocol {
+
+    public Gt30Protocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LineBasedFrameDecoder(1024));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new Gt30ProtocolDecoder(Gt30Protocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Gt30ProtocolDecoder.java b/src/main/java/org/traccar/protocol/Gt30ProtocolDecoder.java
new file mode 100644
index 000000000..abf208a46
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Gt30ProtocolDecoder.java
@@ -0,0 +1,114 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class Gt30ProtocolDecoder extends BaseProtocolDecoder {
+
+    public Gt30ProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("$$")
+            .number("x{4}")                      // length
+            .expression("(.{14})")               // device id
+            .number("x{4}")                      // type
+            .expression("(.)?")                  // alarm
+            .number("(dd)(dd)(dd).(ddd),")       // time (hhmmss.sss)
+            .expression("([AV]),")               // validity
+            .number("(d+)(dd.d+),")              // latitude
+            .expression("([NS]),")
+            .number("(d+)(dd.d+),")              // longitude
+            .expression("([EW]),")
+            .number("(d+.d+)?,")                 // speed
+            .number("(d+.d+)?,")                 // course
+            .number("(dd)(dd)(dd)")              // date (ddmmyy)
+            .expression("[^\\|]*")
+            .number("|(d+.d+)")                  // hdop
+            .number("|(-?d+)")                   // altitude
+            .number("x{4}")                      // checksum
+            .compile();
+
+    private String decodeAlarm(int value) {
+        switch (value) {
+            case 0x01:
+            case 0x02:
+            case 0x03:
+                return Position.ALARM_SOS;
+            case 0x10:
+                return Position.ALARM_LOW_BATTERY;
+            case 0x11:
+                return Position.ALARM_OVERSPEED;
+            case 0x12:
+                return Position.ALARM_GEOFENCE;
+            default:
+                return null;
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next().trim());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        if (parser.hasNext()) {
+            position.set(Position.KEY_ALARM, decodeAlarm(parser.next().charAt(0)));
+        }
+
+        DateBuilder dateBuilder = new DateBuilder()
+                .setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+
+        position.setValid(parser.next().equals("A"));
+        position.setLatitude(parser.nextCoordinate());
+        position.setLongitude(parser.nextCoordinate());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
+
+        dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+        position.setTime(dateBuilder.getDate());
+
+        position.set(Position.KEY_HDOP, parser.nextDouble());
+
+        position.setAltitude(parser.nextDouble(0));
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/H02FrameDecoder.java b/src/main/java/org/traccar/protocol/H02FrameDecoder.java
new file mode 100644
index 000000000..583ad599f
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/H02FrameDecoder.java
@@ -0,0 +1,95 @@
+/*
+ * Copyright 2013 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+import org.traccar.BaseFrameDecoder;
+
+public class H02FrameDecoder extends BaseFrameDecoder {
+
+    private static final int MESSAGE_SHORT = 32;
+    private static final int MESSAGE_LONG = 45;
+
+    private int messageLength;
+
+    public H02FrameDecoder(int messageLength) {
+        this.messageLength = messageLength;
+    }
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+        char marker = (char) buf.getByte(buf.readerIndex());
+
+        while (marker != '*' && marker != '$' && marker != 'X' && buf.readableBytes() > 0) {
+            buf.skipBytes(1);
+            if (buf.readableBytes() > 0) {
+                marker = (char) buf.getByte(buf.readerIndex());
+            }
+        }
+
+        switch (marker) {
+            case '*':
+
+                // Return text message
+                int index = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '#');
+                if (index != -1) {
+                    ByteBuf result = buf.readRetainedSlice(index + 1 - buf.readerIndex());
+                    while (buf.isReadable()
+                            && (buf.getByte(buf.readerIndex()) == '\r' || buf.getByte(buf.readerIndex()) == '\n')) {
+                        buf.readByte(); // skip new line
+                    }
+                    return result;
+                }
+
+                break;
+
+            case '$':
+
+                if (messageLength == 0) {
+                    if (buf.readableBytes() == MESSAGE_LONG) {
+                        messageLength = MESSAGE_LONG;
+                    } else {
+                        messageLength = MESSAGE_SHORT;
+                    }
+                }
+
+                if (buf.readableBytes() >= messageLength) {
+                    return buf.readRetainedSlice(messageLength);
+                }
+
+                break;
+
+            case 'X':
+
+                if (buf.readableBytes() >= MESSAGE_SHORT) {
+                    return buf.readRetainedSlice(MESSAGE_SHORT);
+                }
+
+                break;
+
+            default:
+
+                return null;
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/H02Protocol.java b/src/main/java/org/traccar/protocol/H02Protocol.java
new file mode 100644
index 000000000..251beac5e
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/H02Protocol.java
@@ -0,0 +1,54 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.Context;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+import org.traccar.model.Command;
+
+public class H02Protocol extends BaseProtocol {
+
+    public H02Protocol() {
+        setSupportedDataCommands(
+                Command.TYPE_ALARM_ARM,
+                Command.TYPE_ALARM_DISARM,
+                Command.TYPE_ENGINE_STOP,
+                Command.TYPE_ENGINE_RESUME,
+                Command.TYPE_POSITION_PERIODIC
+        );
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                int messageLength = Context.getConfig().getInteger(getName() + ".messageLength");
+                pipeline.addLast(new H02FrameDecoder(messageLength));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new H02ProtocolEncoder());
+                pipeline.addLast(new H02ProtocolDecoder(H02Protocol.this));
+            }
+        });
+        addServer(new TrackerServer(true, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new H02ProtocolEncoder());
+                pipeline.addLast(new H02ProtocolDecoder(H02Protocol.this));
+            }
+        });
+    }
+}
diff --git a/src/main/java/org/traccar/protocol/H02ProtocolDecoder.java b/src/main/java/org/traccar/protocol/H02ProtocolDecoder.java
new file mode 100644
index 000000000..c4443a00b
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/H02ProtocolDecoder.java
@@ -0,0 +1,583 @@
+/*
+ * Copyright 2012 - 2019 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.ByteBufUtil;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.BcdUtil;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.CellTower;
+import org.traccar.model.Network;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.text.DateFormat;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.TimeZone;
+import java.util.regex.Pattern;
+
+public class H02ProtocolDecoder extends BaseProtocolDecoder {
+
+    public H02ProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static double readCoordinate(ByteBuf buf, boolean lon) {
+
+        int degrees = BcdUtil.readInteger(buf, 2);
+        if (lon) {
+            degrees = degrees * 10 + (buf.getUnsignedByte(buf.readerIndex()) >> 4);
+        }
+
+        double result = 0;
+        if (lon) {
+            result = buf.readUnsignedByte() & 0x0f;
+        }
+
+        int length = 6;
+        if (lon) {
+            length = 5;
+        }
+
+        result = result * 10 + BcdUtil.readInteger(buf, length) * 0.0001;
+
+        result /= 60;
+        result += degrees;
+
+        return result;
+    }
+
+    private void processStatus(Position position, long status) {
+
+        if (!BitUtil.check(status, 0)) {
+            position.set(Position.KEY_ALARM, Position.ALARM_VIBRATION);
+        } else if (!BitUtil.check(status, 1) || !BitUtil.check(status, 18)) {
+            position.set(Position.KEY_ALARM, Position.ALARM_SOS);
+        } else if (!BitUtil.check(status, 2)) {
+            position.set(Position.KEY_ALARM, Position.ALARM_OVERSPEED);
+        } else if (!BitUtil.check(status, 19)) {
+            position.set(Position.KEY_ALARM, Position.ALARM_POWER_CUT);
+        }
+
+        position.set(Position.KEY_IGNITION, BitUtil.check(status, 10));
+        position.set(Position.KEY_STATUS, status);
+
+    }
+
+    private Integer decodeBattery(int value) {
+        switch (value) {
+            case 6:
+                return 100;
+            case 5:
+                return 80;
+            case 4:
+                return 60;
+            case 3:
+                return 20;
+            case 2:
+                return 10;
+            default:
+                return null;
+        }
+    }
+
+    private Position decodeBinary(ByteBuf buf, Channel channel, SocketAddress remoteAddress) {
+
+        Position position = new Position(getProtocolName());
+
+        boolean longId = buf.readableBytes() == 42;
+
+        buf.readByte(); // marker
+
+        String id;
+        if (longId) {
+            id = ByteBufUtil.hexDump(buf.readSlice(8)).substring(0, 15);
+        } else {
+            id = ByteBufUtil.hexDump(buf.readSlice(5));
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, id);
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        DateBuilder dateBuilder = new DateBuilder()
+                .setHour(BcdUtil.readInteger(buf, 2))
+                .setMinute(BcdUtil.readInteger(buf, 2))
+                .setSecond(BcdUtil.readInteger(buf, 2))
+                .setDay(BcdUtil.readInteger(buf, 2))
+                .setMonth(BcdUtil.readInteger(buf, 2))
+                .setYear(BcdUtil.readInteger(buf, 2));
+        position.setTime(dateBuilder.getDate());
+
+        double latitude = readCoordinate(buf, false);
+        position.set(Position.KEY_BATTERY_LEVEL, decodeBattery(buf.readUnsignedByte()));
+        double longitude = readCoordinate(buf, true);
+
+        int flags = buf.readUnsignedByte() & 0x0f;
+        position.setValid((flags & 0x02) != 0);
+        if ((flags & 0x04) == 0) {
+            latitude = -latitude;
+        }
+        if ((flags & 0x08) == 0) {
+            longitude = -longitude;
+        }
+
+        position.setLatitude(latitude);
+        position.setLongitude(longitude);
+
+        position.setSpeed(BcdUtil.readInteger(buf, 3));
+        position.setCourse((buf.readUnsignedByte() & 0x0f) * 100.0 + BcdUtil.readInteger(buf, 2));
+
+        processStatus(position, buf.readUnsignedInt());
+
+        return position;
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("*")
+            .expression("..,")                   // manufacturer
+            .number("(d+)?,")                    // imei
+            .groupBegin()
+            .text("V4,")
+            .expression("(.*),")                 // response
+            .or()
+            .expression("(V[^,]*),")
+            .groupEnd()
+            .number("(?:(dd)(dd)(dd))?,")        // time (hhmmss)
+            .groupBegin()
+            .expression("([ABV])?,")             // validity
+            .or()
+            .number("(d+),")                     // coding scheme
+            .groupEnd()
+            .groupBegin()
+            .number("-(d+)-(d+.d+),")            // latitude
+            .or()
+            .number("(d+)(dd.d+),")              // latitude
+            .groupEnd()
+            .expression("([NS]),")
+            .groupBegin()
+            .number("-(d+)-(d+.d+),")            // longitude
+            .or()
+            .number("(d+)(dd.d+),")              // longitude
+            .groupEnd()
+            .expression("([EW]),")
+            .number("(d+.?d*),")                 // speed
+            .number("(d+.?d*)?,")                // course
+            .number("(?:d+,)?")                  // battery
+            .number("(?:(dd)(dd)(dd))?")         // date (ddmmyy)
+            .groupBegin()
+            .expression(",[^,]*,")
+            .expression("[^,]*,")
+            .expression("[^,]*")                 // sim info
+            .groupEnd("?")
+            .groupBegin()
+            .number(",(x{8})")
+            .groupBegin()
+            .number(",(d+),")                    // odometer
+            .number("(-?d+),")                   // temperature
+            .number("(d+.d+),")                  // fuel
+            .number("(-?d+),")                   // altitude
+            .number("(x+),")                     // lac
+            .number("(x+)")                      // cid
+            .or()
+            .text(",")
+            .expression("(.*)")                  // data
+            .or()
+            .groupEnd()
+            .or()
+            .groupEnd()
+            .text("#")
+            .compile();
+
+    private static final Pattern PATTERN_NBR = new PatternBuilder()
+            .text("*")
+            .expression("..,")                   // manufacturer
+            .number("(d+),")                     // imei
+            .text("NBR,")
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .number("(d+),")                     // mcc
+            .number("(d+),")                     // mnc
+            .number("d+,")                       // gsm delay time
+            .number("d+,")                       // count
+            .number("((?:d+,d+,d+,)+)")          // cells
+            .number("(dd)(dd)(dd),")             // date (ddmmyy)
+            .number("(x{8})")                    // status
+            .any()
+            .compile();
+
+    private static final Pattern PATTERN_LINK = new PatternBuilder()
+            .text("*")
+            .expression("..,")                   // manufacturer
+            .number("(d+),")                     // imei
+            .text("LINK,")
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .number("(d+),")                     // rssi
+            .number("(d+),")                     // satellites
+            .number("(d+),")                     // battery
+            .number("(d+),")                     // steps
+            .number("(d+),")                     // turnovers
+            .number("(dd)(dd)(dd),")             // date (ddmmyy)
+            .number("(x{8})")                    // status
+            .any()
+            .compile();
+
+    private static final Pattern PATTERN_V3 = new PatternBuilder()
+            .text("*")
+            .expression("..,")                   // manufacturer
+            .number("(d+),")                     // imei
+            .text("V3,")
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .number("(ddd)")                     // mcc
+            .number("(d+),")                     // mnc
+            .number("(d+),")                     // count
+            .expression("(.*),")                 // cell info
+            .number("(x{4}),")                   // battery
+            .number("d+,")                       // reboot info
+            .text("X,")
+            .number("(dd)(dd)(dd),")             // date (ddmmyy)
+            .number("(x{8})")                    // status
+            .text("#").optional()
+            .compile();
+
+    private static final Pattern PATTERN_VP1 = new PatternBuilder()
+            .text("*hq,")
+            .number("(d{15}),")                  // imei
+            .text("VP1,")
+            .groupBegin()
+            .text("V,")
+            .number("(d+),")                     // mcc
+            .number("(d+),")                     // mnc
+            .expression("([^#]+)")               // cells
+            .or()
+            .expression("[AB],")                 // validity
+            .number("(d+)(dd.d+),")              // latitude
+            .expression("([NS]),")
+            .number("(d+)(dd.d+),")              // longitude
+            .expression("([EW]),")
+            .number("(d+.d+),")                  // speed
+            .number("(d+.d+),")                  // course
+            .number("(dd)(dd)(dd)")              // date (ddmmyy)
+            .groupEnd()
+            .any()
+            .compile();
+
+    private void sendResponse(Channel channel, SocketAddress remoteAddress, String id, String type) {
+        if (channel != null && id != null) {
+            DateFormat dateFormat = new SimpleDateFormat("yyyyMMddHHmmss");
+            dateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
+            String response = String.format("*HQ,%s,V4,%s,%s#", id, type, dateFormat.format(new Date()));
+            channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
+        }
+    }
+
+    private Position decodeText(String sentence, Channel channel, SocketAddress remoteAddress) {
+
+        Parser parser = new Parser(PATTERN, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        String id = parser.next();
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, id);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        if (parser.hasNext()) {
+            position.set(Position.KEY_RESULT, parser.next());
+        }
+
+        if (parser.hasNext() && parser.next().equals("V1")) {
+            sendResponse(channel, remoteAddress, id, "V1");
+        }
+
+        DateBuilder dateBuilder = new DateBuilder();
+        if (parser.hasNext(3)) {
+            dateBuilder.setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+        }
+
+        if (parser.hasNext()) {
+            position.setValid(parser.next().equals("A"));
+        }
+        if (parser.hasNext()) {
+            parser.nextInt(); // coding scheme
+            position.setValid(true);
+        }
+
+        if (parser.hasNext(2)) {
+            position.setLatitude(-parser.nextCoordinate());
+        }
+        if (parser.hasNext(2)) {
+            position.setLatitude(parser.nextCoordinate());
+        }
+
+        if (parser.hasNext(2)) {
+            position.setLongitude(-parser.nextCoordinate());
+        }
+        if (parser.hasNext(2)) {
+            position.setLongitude(parser.nextCoordinate());
+        }
+
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
+
+        if (parser.hasNext(3)) {
+            dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+            position.setTime(dateBuilder.getDate());
+        } else {
+            position.setTime(new Date());
+        }
+
+        if (parser.hasNext()) {
+            processStatus(position, parser.nextLong(16, 0));
+        }
+
+        if (parser.hasNext(6)) {
+            position.set(Position.KEY_ODOMETER, parser.nextInt(0));
+            position.set(Position.PREFIX_TEMP + 1, parser.nextInt(0));
+            position.set(Position.KEY_FUEL_LEVEL, parser.nextDouble(0));
+
+            position.setAltitude(parser.nextInt(0));
+
+            position.setNetwork(new Network(CellTower.fromLacCid(parser.nextHexInt(0), parser.nextHexInt(0))));
+        }
+
+        if (parser.hasNext(4)) {
+            String[] values = parser.next().split(",");
+            for (int i = 0; i < values.length; i++) {
+                position.set(Position.PREFIX_IO + (i + 1), values[i].trim());
+            }
+        }
+
+        return position;
+    }
+
+    private Position decodeLbs(String sentence, Channel channel, SocketAddress remoteAddress) {
+
+        Parser parser = new Parser(PATTERN_NBR, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        String id = parser.next();
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, id);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        sendResponse(channel, remoteAddress, id, "NBR");
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        DateBuilder dateBuilder = new DateBuilder()
+                .setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+
+        Network network = new Network();
+        int mcc = parser.nextInt(0);
+        int mnc = parser.nextInt(0);
+
+        String[] cells = parser.next().split(",");
+        for (int i = 0; i < cells.length / 3; i++) {
+            network.addCellTower(CellTower.from(mcc, mnc, Integer.parseInt(cells[i * 3]),
+                    Integer.parseInt(cells[i * 3 + 1]), Integer.parseInt(cells[i * 3 + 2])));
+        }
+
+        position.setNetwork(network);
+
+        dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+
+        getLastLocation(position, dateBuilder.getDate());
+
+        processStatus(position, parser.nextLong(16, 0));
+
+        return position;
+    }
+
+    private Position decodeLink(String sentence, Channel channel, SocketAddress remoteAddress) {
+
+        Parser parser = new Parser(PATTERN_LINK, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        DateBuilder dateBuilder = new DateBuilder()
+                .setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+
+        position.set(Position.KEY_RSSI, parser.nextInt());
+        position.set(Position.KEY_SATELLITES, parser.nextInt());
+        position.set(Position.KEY_BATTERY_LEVEL, parser.nextInt());
+        position.set(Position.KEY_STEPS, parser.nextInt());
+        position.set("turnovers", parser.nextInt());
+
+        dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+
+        getLastLocation(position, dateBuilder.getDate());
+
+        processStatus(position, parser.nextLong(16, 0));
+
+        return position;
+    }
+
+    private Position decodeV3(String sentence, Channel channel, SocketAddress remoteAddress) {
+
+        Parser parser = new Parser(PATTERN_V3, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        DateBuilder dateBuilder = new DateBuilder()
+                .setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+
+        int mcc = parser.nextInt();
+        int mnc = parser.nextInt();
+
+        int count = parser.nextInt();
+        Network network = new Network();
+        String[] values = parser.next().split(",");
+        for (int i = 0; i < count; i++) {
+            network.addCellTower(CellTower.from(
+                    mcc, mnc, Integer.parseInt(values[i * 4]), Integer.parseInt(values[i * 4 + 1])));
+        }
+        position.setNetwork(network);
+
+        position.set(Position.KEY_BATTERY, parser.nextHexInt());
+
+        dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+
+        getLastLocation(position, dateBuilder.getDate());
+
+        processStatus(position, parser.nextLong(16, 0));
+
+        return position;
+    }
+
+    private Position decodeVp1(String sentence, Channel channel, SocketAddress remoteAddress) {
+
+        Parser parser = new Parser(PATTERN_VP1, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        if (parser.hasNext(3)) {
+
+            getLastLocation(position, null);
+
+            int mcc = parser.nextInt();
+            int mnc = parser.nextInt();
+
+            Network network = new Network();
+            for (String cell : parser.next().split("Y")) {
+                String[] values = cell.split(",");
+                network.addCellTower(CellTower.from(mcc, mnc,
+                        Integer.parseInt(values[0]), Integer.parseInt(values[1]), Integer.parseInt(values[2])));
+            }
+
+            position.setNetwork(network);
+
+        } else {
+
+            position.setValid(true);
+            position.setLatitude(parser.nextCoordinate());
+            position.setLongitude(parser.nextCoordinate());
+            position.setSpeed(parser.nextDouble());
+            position.setCourse(parser.nextDouble());
+
+            position.setTime(new DateBuilder()
+                    .setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0)).getDate());
+
+        }
+
+        return position;
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+        String marker = buf.toString(0, 1, StandardCharsets.US_ASCII);
+
+        switch (marker) {
+            case "*":
+                String sentence = buf.toString(StandardCharsets.US_ASCII).trim();
+                int typeStart = sentence.indexOf(',', sentence.indexOf(',') + 1) + 1;
+                int typeEnd = sentence.indexOf(',', typeStart);
+                if (typeEnd > 0) {
+                    String type = sentence.substring(typeStart, typeEnd);
+                    switch (type) {
+                        case "NBR":
+                            return decodeLbs(sentence, channel, remoteAddress);
+                        case "LINK":
+                            return decodeLink(sentence, channel, remoteAddress);
+                        case "V3":
+                            return decodeV3(sentence, channel, remoteAddress);
+                        case "VP1":
+                            return decodeVp1(sentence, channel, remoteAddress);
+                        default:
+                            return decodeText(sentence, channel, remoteAddress);
+                    }
+                } else {
+                    return null;
+                }
+            case "$":
+                return decodeBinary(buf, channel, remoteAddress);
+            case "X":
+            default:
+                return null;
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/H02ProtocolEncoder.java b/src/main/java/org/traccar/protocol/H02ProtocolEncoder.java
new file mode 100644
index 000000000..614a07dd1
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/H02ProtocolEncoder.java
@@ -0,0 +1,73 @@
+/*
+ * Copyright 2016 Gabor Somogyi (gabor.g.somogyi@gmail.com)
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.Context;
+import org.traccar.StringProtocolEncoder;
+import org.traccar.model.Command;
+
+import java.util.Date;
+
+public class H02ProtocolEncoder extends StringProtocolEncoder {
+
+    private static final String MARKER = "HQ";
+
+    private Object formatCommand(Date time, String uniqueId, String type, String... params) {
+
+        StringBuilder result = new StringBuilder(
+                String.format("*%s,%s,%s,%4$tH%4$tM%4$tS", MARKER, uniqueId, type, time));
+
+        for (String param : params) {
+            result.append(",").append(param);
+        }
+
+        result.append("#");
+
+        return result.toString();
+    }
+
+    protected Object encodeCommand(Command command, Date time) {
+        String uniqueId = getUniqueId(command.getDeviceId());
+
+        switch (command.getType()) {
+            case Command.TYPE_ALARM_ARM:
+                return formatCommand(time, uniqueId, "SCF", "0", "0");
+            case Command.TYPE_ALARM_DISARM:
+                return formatCommand(time, uniqueId, "SCF", "1", "1");
+            case Command.TYPE_ENGINE_STOP:
+                return formatCommand(time, uniqueId, "S20", "1", "1");
+            case Command.TYPE_ENGINE_RESUME:
+                return formatCommand(time, uniqueId, "S20", "1", "0");
+            case Command.TYPE_POSITION_PERIODIC:
+                String frequency = command.getAttributes().get(Command.KEY_FREQUENCY).toString();
+                if (Context.getIdentityManager().lookupAttributeBoolean(
+                        command.getDeviceId(), "h02.alternative", false, true)) {
+                    return formatCommand(time, uniqueId, "D1", frequency);
+                } else {
+                    return formatCommand(time, uniqueId, "S71", "22", frequency);
+                }
+            default:
+                return null;
+        }
+    }
+
+    @Override
+    protected Object encodeCommand(Command command) {
+        return encodeCommand(command, new Date());
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/HaicomProtocol.java b/src/main/java/org/traccar/protocol/HaicomProtocol.java
new file mode 100644
index 000000000..6e5760bd4
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/HaicomProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.CharacterDelimiterFrameDecoder;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class HaicomProtocol extends BaseProtocol {
+
+    public HaicomProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, '*'));
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new HaicomProtocolDecoder(HaicomProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/HaicomProtocolDecoder.java b/src/main/java/org/traccar/protocol/HaicomProtocolDecoder.java
new file mode 100644
index 000000000..dd20f2aeb
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/HaicomProtocolDecoder.java
@@ -0,0 +1,109 @@
+/*
+ * Copyright 2014 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class HaicomProtocolDecoder extends BaseProtocolDecoder {
+
+    public HaicomProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("$GPRS")
+            .number("(d+),")                     // imei
+            .expression("([^,]+),")              // version
+            .number("(dd)(dd)(dd),")             // date (yymmdd)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .number("(d)")                       // flags
+            .number("(dd)(d{5})")                // latitude
+            .number("(ddd)(d{5}),")              // longitude
+            .number("(d+),")                     // speed
+            .number("(d+),")                     // course
+            .number("(d+),")                     // status
+            .number("(d+)?,")                    // gprs counting value
+            .number("(d+)?,")                    // gps power saving counting value
+            .number("(d+),")                     // switch status
+            .number("(d+)")                      // relay status
+            .expression("(?:[LH]{2})?")          // power status
+            .number("#V(d+)")                    // battery
+            .any()
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.set(Position.KEY_VERSION_FW, parser.next());
+
+        position.setTime(parser.nextDateTime());
+
+        int flags = parser.nextInt(0);
+
+        position.setValid(BitUtil.check(flags, 0));
+
+        double latitude = parser.nextDouble(0) + parser.nextDouble(0) / 60000;
+        if (BitUtil.check(flags, 2)) {
+            position.setLatitude(latitude);
+        } else {
+            position.setLatitude(-latitude);
+        }
+
+        double longitude = parser.nextDouble(0) + parser.nextDouble(0) / 60000;
+        if (BitUtil.check(flags, 1)) {
+            position.setLongitude(longitude);
+        } else {
+            position.setLongitude(-longitude);
+        }
+
+        position.setSpeed(parser.nextDouble(0) / 10);
+        position.setCourse(parser.nextDouble(0) / 10);
+
+        position.set(Position.KEY_STATUS, parser.next());
+        position.set("gprsCount", parser.next());
+        position.set("powersaveCountdown", parser.next());
+        position.set(Position.KEY_INPUT, parser.next());
+        position.set(Position.KEY_OUTPUT, parser.next());
+        position.set(Position.KEY_BATTERY, parser.nextDouble(0) * 0.1);
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/HomtecsProtocol.java b/src/main/java/org/traccar/protocol/HomtecsProtocol.java
new file mode 100644
index 000000000..34dbf0f51
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/HomtecsProtocol.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class HomtecsProtocol extends BaseProtocol {
+
+    public HomtecsProtocol() {
+        addServer(new TrackerServer(true, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new HomtecsProtocolDecoder(HomtecsProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/HomtecsProtocolDecoder.java b/src/main/java/org/traccar/protocol/HomtecsProtocolDecoder.java
new file mode 100644
index 000000000..a93572b5c
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/HomtecsProtocolDecoder.java
@@ -0,0 +1,91 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class HomtecsProtocolDecoder extends BaseProtocolDecoder {
+
+    public HomtecsProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .expression("([^_]+)")               // id
+            .text("_R")
+            .number("(x{8}),")                   // mac ending
+            .number("(dd)(dd)(dd),")             // date (yymmdd)
+            .number("(dd)(dd)(dd).d+,")          // time (hhmmss)
+            .number("(d+),")                     // satellites
+            .number("(dd)(dd.d+),")              // latitude
+            .expression("([NS]),")
+            .number("(ddd)(dd.d+),")             // longitude
+            .expression("([EW]),")
+            .number("(d+.?d*)?,")                // speed
+            .number("(d+.?d*)?,")                // course
+            .number("(d),")                      // fix status
+            .number("(d+.?d*)?,")                // hdop
+            .number("(d+.?d*)?")                 // altitude
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        String id = parser.next();
+        String mac = parser.next();
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, id, id + "_R" + mac);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setTime(parser.nextDateTime(Parser.DateTimeFormat.YMD_HMS));
+
+        position.set(Position.KEY_SATELLITES, parser.nextInt(0));
+
+        position.setLatitude(parser.nextCoordinate());
+        position.setLongitude(parser.nextCoordinate());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
+
+        position.setValid(parser.nextInt(0) > 0);
+
+        position.set(Position.KEY_HDOP, parser.nextDouble(0));
+
+        position.setAltitude(parser.nextDouble(0));
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/HuaShengFrameDecoder.java b/src/main/java/org/traccar/protocol/HuaShengFrameDecoder.java
new file mode 100644
index 000000000..bd52aa9e7
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/HuaShengFrameDecoder.java
@@ -0,0 +1,58 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+import org.traccar.BaseFrameDecoder;
+
+public class HuaShengFrameDecoder extends BaseFrameDecoder {
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+        if (buf.readableBytes() < 2) {
+            return null;
+        }
+
+        int index = buf.indexOf(buf.readerIndex() + 1, buf.writerIndex(), (byte) 0xC0);
+        if (index != -1) {
+            ByteBuf result = Unpooled.buffer(index + 1 - buf.readerIndex());
+
+            while (buf.readerIndex() <= index) {
+                int b = buf.readUnsignedByte();
+                if (b == 0xDB) {
+                    int ext = buf.readUnsignedByte();
+                    if (ext == 0xDC) {
+                        result.writeByte(0xC0);
+                    } else if (ext == 0xDD) {
+                        result.writeByte(0xDB);
+                    }
+                } else {
+                    result.writeByte(b);
+                }
+            }
+
+            return result;
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/HuaShengProtocol.java b/src/main/java/org/traccar/protocol/HuaShengProtocol.java
new file mode 100644
index 000000000..103f2d501
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/HuaShengProtocol.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class HuaShengProtocol extends BaseProtocol {
+
+    public HuaShengProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new HuaShengFrameDecoder());
+                pipeline.addLast(new HuaShengProtocolDecoder(HuaShengProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/HuaShengProtocolDecoder.java b/src/main/java/org/traccar/protocol/HuaShengProtocolDecoder.java
new file mode 100644
index 000000000..8a937a194
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/HuaShengProtocolDecoder.java
@@ -0,0 +1,155 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+
+public class HuaShengProtocolDecoder extends BaseProtocolDecoder {
+
+    public HuaShengProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    public static final int MSG_POSITION = 0xAA00;
+    public static final int MSG_POSITION_RSP = 0xFF01;
+    public static final int MSG_LOGIN = 0xAA02;
+    public static final int MSG_LOGIN_RSP = 0xFF03;
+    public static final int MSG_HSO_REQ = 0x0002;
+    public static final int MSG_HSO_RSP = 0x0003;
+
+    private void sendResponse(Channel channel, int type, int index, ByteBuf content) {
+        if (channel != null) {
+            ByteBuf response = Unpooled.buffer();
+            response.writeByte(0xC0);
+            response.writeShort(0x0100);
+            response.writeShort(12 + (content != null ? content.readableBytes() : 0));
+            response.writeShort(type);
+            response.writeShort(0);
+            response.writeInt(index);
+            if (content != null) {
+                response.writeBytes(content);
+                content.release();
+            }
+            response.writeByte(0xC0);
+            channel.writeAndFlush(new NetworkMessage(response, channel.remoteAddress()));
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        buf.skipBytes(1); // start marker
+        buf.readUnsignedByte(); // flag
+        buf.readUnsignedByte(); // reserved
+        buf.readUnsignedShort(); // length
+
+        int type = buf.readUnsignedShort();
+
+        buf.readUnsignedShort(); // checksum
+        int index = buf.readInt();
+
+        if (type == MSG_LOGIN) {
+
+            while (buf.readableBytes() > 4) {
+                int subtype = buf.readUnsignedShort();
+                int length = buf.readUnsignedShort() - 4;
+                if (subtype == 0x0003) {
+                    String imei = buf.readSlice(length).toString(StandardCharsets.US_ASCII);
+                    DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
+                    if (deviceSession != null && channel != null) {
+                        ByteBuf content = Unpooled.buffer();
+                        content.writeByte(0); // success
+                        sendResponse(channel, MSG_LOGIN_RSP, index, content);
+                    }
+                } else {
+                    buf.skipBytes(length);
+                }
+            }
+
+        } else if (type == MSG_HSO_REQ) {
+
+            sendResponse(channel, MSG_HSO_RSP, index, null);
+
+        } else if (type == MSG_POSITION) {
+
+            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+            if (deviceSession == null) {
+                return null;
+            }
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            int status = buf.readUnsignedShort();
+
+            position.setValid(BitUtil.check(status, 15));
+
+            position.set(Position.KEY_STATUS, status);
+            position.set(Position.KEY_IGNITION, BitUtil.check(status, 14));
+            position.set(Position.KEY_EVENT, buf.readUnsignedShort());
+
+            String time = buf.readSlice(12).toString(StandardCharsets.US_ASCII);
+
+            DateBuilder dateBuilder = new DateBuilder()
+                    .setYear(Integer.parseInt(time.substring(0, 2)))
+                    .setMonth(Integer.parseInt(time.substring(2, 4)))
+                    .setDay(Integer.parseInt(time.substring(4, 6)))
+                    .setHour(Integer.parseInt(time.substring(6, 8)))
+                    .setMinute(Integer.parseInt(time.substring(8, 10)))
+                    .setSecond(Integer.parseInt(time.substring(10, 12)));
+            position.setTime(dateBuilder.getDate());
+
+            position.setLongitude(buf.readInt() * 0.00001);
+            position.setLatitude(buf.readInt() * 0.00001);
+
+            position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShort()));
+            position.setCourse(buf.readUnsignedShort());
+            position.setAltitude(buf.readUnsignedShort());
+
+            position.set(Position.KEY_ODOMETER, buf.readUnsignedShort() * 1000);
+
+            while (buf.readableBytes() > 4) {
+                buf.readUnsignedShort(); // subtype
+                int length = buf.readUnsignedShort() - 4;
+                buf.skipBytes(length);
+            }
+
+            sendResponse(channel, MSG_POSITION_RSP, index, null);
+
+            return position;
+
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/HuabaoFrameDecoder.java b/src/main/java/org/traccar/protocol/HuabaoFrameDecoder.java
new file mode 100644
index 000000000..b520f6be9
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/HuabaoFrameDecoder.java
@@ -0,0 +1,58 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+import org.traccar.BaseFrameDecoder;
+
+public class HuabaoFrameDecoder extends BaseFrameDecoder {
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+        if (buf.readableBytes() < 2) {
+            return null;
+        }
+
+        int index = buf.indexOf(buf.readerIndex() + 1, buf.writerIndex(), (byte) 0x7e);
+        if (index != -1) {
+            ByteBuf result = Unpooled.buffer(index + 1 - buf.readerIndex());
+
+            while (buf.readerIndex() <= index) {
+                int b = buf.readUnsignedByte();
+                if (b == 0x7d) {
+                    int ext = buf.readUnsignedByte();
+                    if (ext == 0x01) {
+                        result.writeByte(0x7d);
+                    } else if (ext == 0x02) {
+                        result.writeByte(0x7e);
+                    }
+                } else {
+                    result.writeByte(b);
+                }
+            }
+
+            return result;
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/HuabaoProtocol.java b/src/main/java/org/traccar/protocol/HuabaoProtocol.java
new file mode 100644
index 000000000..44c9f7ac7
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/HuabaoProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+import org.traccar.model.Command;
+
+public class HuabaoProtocol extends BaseProtocol {
+
+    public HuabaoProtocol() {
+        setSupportedDataCommands(
+                Command.TYPE_ENGINE_STOP,
+                Command.TYPE_ENGINE_RESUME);
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new HuabaoFrameDecoder());
+                pipeline.addLast(new HuabaoProtocolEncoder());
+                pipeline.addLast(new HuabaoProtocolDecoder(HuabaoProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/HuabaoProtocolDecoder.java b/src/main/java/org/traccar/protocol/HuabaoProtocolDecoder.java
new file mode 100644
index 000000000..6e2e1377b
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/HuabaoProtocolDecoder.java
@@ -0,0 +1,235 @@
+/*
+ * Copyright 2015 - 2019 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.ByteBufUtil;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.BcdUtil;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.Checksum;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.LinkedList;
+import java.util.List;
+
+public class HuabaoProtocolDecoder extends BaseProtocolDecoder {
+
+    public HuabaoProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    public static final int MSG_GENERAL_RESPONSE = 0x8001;
+    public static final int MSG_TERMINAL_REGISTER = 0x0100;
+    public static final int MSG_TERMINAL_REGISTER_RESPONSE = 0x8100;
+    public static final int MSG_TERMINAL_CONTROL = 0x8105;
+    public static final int MSG_TERMINAL_AUTH = 0x0102;
+    public static final int MSG_LOCATION_REPORT = 0x0200;
+    public static final int MSG_LOCATION_BATCH = 0x0704;
+    public static final int MSG_OIL_CONTROL = 0XA006;
+
+    public static final int RESULT_SUCCESS = 0;
+
+    public static ByteBuf formatMessage(int type, ByteBuf id, ByteBuf data) {
+        ByteBuf buf = Unpooled.buffer();
+        buf.writeByte(0x7e);
+        buf.writeShort(type);
+        buf.writeShort(data.readableBytes());
+        buf.writeBytes(id);
+        buf.writeShort(1); // index
+        buf.writeBytes(data);
+        data.release();
+        buf.writeByte(Checksum.xor(buf.nioBuffer(1, buf.readableBytes() - 1)));
+        buf.writeByte(0x7e);
+        return buf;
+    }
+
+    private void sendGeneralResponse(
+            Channel channel, SocketAddress remoteAddress, ByteBuf id, int type, int index) {
+        if (channel != null) {
+            ByteBuf response = Unpooled.buffer();
+            response.writeShort(index);
+            response.writeShort(type);
+            response.writeByte(RESULT_SUCCESS);
+            channel.writeAndFlush(new NetworkMessage(
+                    formatMessage(MSG_GENERAL_RESPONSE, id, response), remoteAddress));
+        }
+    }
+
+    private String decodeAlarm(long value) {
+        if (BitUtil.check(value, 0)) {
+            return Position.ALARM_SOS;
+        }
+        if (BitUtil.check(value, 1)) {
+            return Position.ALARM_OVERSPEED;
+        }
+        if (BitUtil.check(value, 5)) {
+            return Position.ALARM_GPS_ANTENNA_CUT;
+        }
+        if (BitUtil.check(value, 4) || BitUtil.check(value, 9)
+                || BitUtil.check(value, 10) || BitUtil.check(value, 11)) {
+            return Position.ALARM_FAULT;
+        }
+        if (BitUtil.check(value, 8)) {
+            return Position.ALARM_POWER_OFF;
+        }
+        if (BitUtil.check(value, 20)) {
+            return Position.ALARM_GEOFENCE;
+        }
+        if (BitUtil.check(value, 29)) {
+            return Position.ALARM_ACCIDENT;
+        }
+        return null;
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        buf.readUnsignedByte(); // start marker
+        int type = buf.readUnsignedShort();
+        buf.readUnsignedShort(); // body length
+        ByteBuf id = buf.readSlice(6); // phone number
+        int index = buf.readUnsignedShort();
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, ByteBufUtil.hexDump(id));
+        if (deviceSession == null) {
+            return null;
+        }
+
+        if (deviceSession.getTimeZone() == null) {
+            deviceSession.setTimeZone(getTimeZone(deviceSession.getDeviceId(), "GMT+8"));
+        }
+
+        if (type == MSG_TERMINAL_REGISTER) {
+
+            if (channel != null) {
+                ByteBuf response = Unpooled.buffer();
+                response.writeShort(index);
+                response.writeByte(RESULT_SUCCESS);
+                response.writeBytes("authentication".getBytes(StandardCharsets.US_ASCII));
+                channel.writeAndFlush(new NetworkMessage(
+                        formatMessage(MSG_TERMINAL_REGISTER_RESPONSE, id, response), remoteAddress));
+            }
+
+        } else if (type == MSG_TERMINAL_AUTH) {
+
+            sendGeneralResponse(channel, remoteAddress, id, type, index);
+
+        } else if (type == MSG_LOCATION_REPORT) {
+
+            return decodeLocation(deviceSession, buf);
+
+        } else if (type == MSG_LOCATION_BATCH) {
+
+            return decodeLocationBatch(deviceSession, buf);
+
+        }
+
+        return null;
+    }
+
+    private Position decodeLocation(DeviceSession deviceSession, ByteBuf buf) {
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.set(Position.KEY_ALARM, decodeAlarm(buf.readUnsignedInt()));
+
+        int flags = buf.readInt();
+
+        position.set(Position.KEY_IGNITION, BitUtil.check(flags, 0));
+
+        position.setValid(BitUtil.check(flags, 1));
+
+        double lat = buf.readUnsignedInt() * 0.000001;
+        double lon = buf.readUnsignedInt() * 0.000001;
+
+        if (BitUtil.check(flags, 2)) {
+            position.setLatitude(-lat);
+        } else {
+            position.setLatitude(lat);
+        }
+
+        if (BitUtil.check(flags, 3)) {
+            position.setLongitude(-lon);
+        } else {
+            position.setLongitude(lon);
+        }
+
+        position.setAltitude(buf.readShort());
+        position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShort() * 0.1));
+        position.setCourse(buf.readUnsignedShort());
+
+        DateBuilder dateBuilder = new DateBuilder(deviceSession.getTimeZone())
+                .setYear(BcdUtil.readInteger(buf, 2))
+                .setMonth(BcdUtil.readInteger(buf, 2))
+                .setDay(BcdUtil.readInteger(buf, 2))
+                .setHour(BcdUtil.readInteger(buf, 2))
+                .setMinute(BcdUtil.readInteger(buf, 2))
+                .setSecond(BcdUtil.readInteger(buf, 2));
+        position.setTime(dateBuilder.getDate());
+
+        while (buf.readableBytes() > 2) {
+            int subtype = buf.readUnsignedByte();
+            int length = buf.readUnsignedByte();
+            switch (subtype) {
+                case 0x01:
+                    position.set(Position.KEY_ODOMETER, buf.readUnsignedInt() * 100);
+                    break;
+                case 0x30:
+                    position.set(Position.KEY_RSSI, buf.readUnsignedByte());
+                    break;
+                case 0x31:
+                    position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
+                    break;
+                default:
+                    buf.skipBytes(length);
+                    break;
+            }
+        }
+
+        return position;
+    }
+
+    private List<Position> decodeLocationBatch(DeviceSession deviceSession, ByteBuf buf) {
+
+        List<Position> positions = new LinkedList<>();
+
+        int count = buf.readUnsignedShort();
+        buf.readUnsignedByte(); // location type
+
+        for (int i = 0; i < count; i++) {
+            int endIndex = buf.readUnsignedShort() + buf.readerIndex();
+            positions.add(decodeLocation(deviceSession, buf));
+            buf.readerIndex(endIndex);
+        }
+
+        return positions;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/HuabaoProtocolEncoder.java b/src/main/java/org/traccar/protocol/HuabaoProtocolEncoder.java
new file mode 100644
index 000000000..7759790c4
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/HuabaoProtocolEncoder.java
@@ -0,0 +1,73 @@
+/*
+ * Copyright 2017 - 2019 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import org.traccar.BaseProtocolEncoder;
+import org.traccar.Context;
+import org.traccar.helper.DataConverter;
+import org.traccar.model.Command;
+
+import java.text.SimpleDateFormat;
+import java.util.Date;
+
+public class HuabaoProtocolEncoder extends BaseProtocolEncoder {
+
+    @Override
+    protected Object encodeCommand(Command command) {
+
+        boolean alternative = Context.getIdentityManager().lookupAttributeBoolean(
+                command.getDeviceId(), "huabao.alternative", false, true);
+
+        ByteBuf id = Unpooled.wrappedBuffer(
+                DataConverter.parseHex(getUniqueId(command.getDeviceId())));
+        try {
+            ByteBuf data = Unpooled.buffer();
+            byte[] time = DataConverter.parseHex(new SimpleDateFormat("yyMMddHHmmss").format(new Date()));
+
+            switch (command.getType()) {
+                case Command.TYPE_ENGINE_STOP:
+                    if (alternative) {
+                        data.writeByte(0x01);
+                        data.writeBytes(time);
+                        return HuabaoProtocolDecoder.formatMessage(
+                                HuabaoProtocolDecoder.MSG_OIL_CONTROL, id, data);
+                    } else {
+                        data.writeByte(0xf0);
+                        return HuabaoProtocolDecoder.formatMessage(
+                                HuabaoProtocolDecoder.MSG_TERMINAL_CONTROL, id, data);
+                    }
+                case Command.TYPE_ENGINE_RESUME:
+                    if (alternative) {
+                        data.writeByte(0x00);
+                        data.writeBytes(time);
+                        return HuabaoProtocolDecoder.formatMessage(
+                                HuabaoProtocolDecoder.MSG_OIL_CONTROL, id, data);
+                    } else {
+                        data.writeByte(0xf1);
+                        return HuabaoProtocolDecoder.formatMessage(
+                                HuabaoProtocolDecoder.MSG_TERMINAL_CONTROL, id, data);
+                    }
+                default:
+                    return null;
+            }
+        } finally {
+            id.release();
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/HunterProProtocol.java b/src/main/java/org/traccar/protocol/HunterProProtocol.java
new file mode 100644
index 000000000..9f6424a57
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/HunterProProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.CharacterDelimiterFrameDecoder;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class HunterProProtocol extends BaseProtocol {
+
+    public HunterProProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, "\r"));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new HunterProProtocolDecoder(HunterProProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/HunterProProtocolDecoder.java b/src/main/java/org/traccar/protocol/HunterProProtocolDecoder.java
new file mode 100644
index 000000000..06bc12d59
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/HunterProProtocolDecoder.java
@@ -0,0 +1,83 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class HunterProProtocolDecoder extends BaseProtocolDecoder {
+
+    public HunterProProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .number(">(d+)<")                    // identifier
+            .text("$GPRMC,")
+            .number("(dd)(dd)(dd).?d*,")         // time (hhmmss)
+            .expression("([AV]),")               // validity
+            .number("(dd)(dd.d+),")              // latitude
+            .expression("([NS]),")
+            .number("(ddd)(dd.d+),")             // longitude
+            .expression("([EW]),")
+            .number("(d+.?d*)?,")                // speed
+            .number("(d+.?d*)?,")                // course
+            .number("(dd)(dd)(dd)")              // date (ddmmyy)
+            .any()
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        DateBuilder dateBuilder = new DateBuilder();
+        dateBuilder.setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+
+        position.setValid(parser.next().equals("A"));
+        position.setLatitude(parser.nextCoordinate());
+        position.setLongitude(parser.nextCoordinate());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
+
+        dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+        position.setTime(dateBuilder.getDate());
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/IdplProtocol.java b/src/main/java/org/traccar/protocol/IdplProtocol.java
new file mode 100644
index 000000000..418178756
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/IdplProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LineBasedFrameDecoder;
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class IdplProtocol extends BaseProtocol {
+
+    public IdplProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LineBasedFrameDecoder(1024));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new IdplProtocolDecoder(IdplProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/IdplProtocolDecoder.java b/src/main/java/org/traccar/protocol/IdplProtocolDecoder.java
new file mode 100644
index 000000000..cf3c03d7f
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/IdplProtocolDecoder.java
@@ -0,0 +1,112 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.Parser.CoordinateFormat;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+public class IdplProtocolDecoder extends BaseProtocolDecoder {
+
+    public IdplProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("*ID")                         // start of frame
+            .number("(d+),")                     // command code
+            .number("(d+),")                     // imei
+            .number("(dd)(dd)(dd),")             // current date (ddmmyy)
+            .number("(dd)(dd)(dd),")             // current time (hhmmss)
+            .expression("([A|V]),")              // gps fix
+            .number("(dd)(dd).?(d+),([NS]),")    // latitude
+            .number("(ddd)(dd).?(d+),([EW]),")   // longitude
+            .number("(d{1,3}.dd),")              // speed
+            .number("(d{1,3}.dd),")              // course
+            .number("(d{1,2}),")                 // sats
+            .number("(d{1,3}),")                 // gsm signal strength
+            .expression("([A|N|S]),")            // vehicle status
+            .expression("([0|1]),")              // main power status
+            .number("(d.dd),")                   // internal battery voltage
+            .expression("([0|1]),")              // sos alert
+            .expression("([0|1]),")              // body tamper
+            .expression("([0|1])([0|1]),")       // ac status + ign status
+            .expression("([0|1|2]),")            // output1 status
+            .number("(d{1,3}),")                 // adc1
+            .number("(d{1,3}),")                 // adc2
+            .expression("([0-9A-Z]{3}),")        // software version
+            .expression("([L|R]),")              // message type
+            .number("(x{4})#")                   // crc
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+
+        position.set(Position.KEY_TYPE, parser.nextInt(0));
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
+
+        position.setValid(parser.next().equals("A"));
+        position.setLatitude(parser.nextCoordinate(CoordinateFormat.DEG_MIN_MIN_HEM));
+        position.setLongitude(parser.nextCoordinate(CoordinateFormat.DEG_MIN_MIN_HEM));
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
+
+        position.set(Position.KEY_SATELLITES, parser.nextInt(0));
+        position.set(Position.KEY_RSSI, parser.nextInt(0));
+        position.set("vehicleStatus", parser.next());
+        position.set(Position.KEY_POWER, parser.nextInt(0));
+        position.set(Position.KEY_BATTERY, parser.nextDouble(0));
+        if (parser.nextInt(0) == 1) {
+            position.set(Position.KEY_ALARM, Position.ALARM_SOS);
+        }
+        parser.nextInt(0); // body tamper
+        position.set("acStatus", parser.nextInt(0));
+        position.set(Position.KEY_IGNITION, parser.nextInt(0) == 1);
+        position.set(Position.KEY_OUTPUT, parser.nextInt(0));
+        position.set(Position.PREFIX_ADC + 1, parser.nextInt(0));
+        position.set(Position.PREFIX_ADC + 2, parser.nextInt(0));
+        position.set(Position.KEY_VERSION_FW, parser.next());
+        position.set(Position.KEY_ARCHIVE, parser.next().equals("R"));
+
+        parser.next(); // checksum
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/IntellitracFrameDecoder.java b/src/main/java/org/traccar/protocol/IntellitracFrameDecoder.java
new file mode 100644
index 000000000..8322e65ba
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/IntellitracFrameDecoder.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright 2013 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.handler.codec.LineBasedFrameDecoder;
+import org.traccar.NetworkMessage;
+
+public class IntellitracFrameDecoder extends LineBasedFrameDecoder {
+
+    private static final int MESSAGE_MINIMUM_LENGTH = 0;
+
+    public IntellitracFrameDecoder(int maxFrameLength) {
+        super(maxFrameLength);
+    }
+
+    // example of sync header: 0xFA 0xF8 0x1B 0x01 0x81 0x60 0x33 0x3C
+
+    @Override
+    protected Object decode(ChannelHandlerContext ctx, ByteBuf buf) throws Exception {
+
+        // Check minimum length
+        if (buf.readableBytes() < MESSAGE_MINIMUM_LENGTH) {
+            return null;
+        }
+
+        // Check for sync packet
+        if (buf.getUnsignedShort(buf.readerIndex()) == 0xFAF8) {
+            ByteBuf syncMessage = buf.readRetainedSlice(8);
+            if (ctx != null && ctx.channel() != null) {
+                ctx.channel().writeAndFlush(new NetworkMessage(syncMessage, ctx.channel().remoteAddress()));
+            }
+        }
+
+        return super.decode(ctx, buf);
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/IntellitracProtocol.java b/src/main/java/org/traccar/protocol/IntellitracProtocol.java
new file mode 100644
index 000000000..3abf40da7
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/IntellitracProtocol.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class IntellitracProtocol extends BaseProtocol {
+
+    public IntellitracProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new IntellitracFrameDecoder(1024));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new IntellitracProtocolDecoder(IntellitracProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/IntellitracProtocolDecoder.java b/src/main/java/org/traccar/protocol/IntellitracProtocolDecoder.java
new file mode 100644
index 000000000..897606270
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/IntellitracProtocolDecoder.java
@@ -0,0 +1,117 @@
+/*
+ * Copyright 2013 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class IntellitracProtocolDecoder extends BaseProtocolDecoder {
+
+    public IntellitracProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .expression(".+,").optional()
+            .number("(d+),")                     // identifier
+            .number("(dddd)(dd)(dd)")            // date (yyyymmdd)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .number("(-?d+.d+),")                // longitude
+            .number("(-?d+.d+),")                // latitude
+            .number("(d+.?d*),")                 // speed
+            .number("(d+.?d*),")                 // course
+            .number("(-?d+.?d*),")               // altitude
+            .number("(d+),")                     // satellites
+            .number("(d+),")                     // index
+            .number("(d+),")                     // input
+            .number("(d+),?")                    // output
+            .number("(d+.d+)?,?")                // adc1
+            .number("(d+.d+)?,?")                // adc2
+            .groupBegin()
+            .number("d{14},d+,")
+            .number("(d+),")                     // vss
+            .number("(d+),")                     // rpm
+            .number("(-?d+),")                   // coolant
+            .number("(d+),")                     // fuel
+            .number("(d+),")                     // fuel consumption
+            .number("(-?d+),")                   // fuel temperature
+            .number("(d+),")                     // charger pressure
+            .number("(d+),")                     // tpl
+            .number("(d+),")                     // axle weight
+            .number("(d+)")                      // odometer
+            .groupEnd("?")
+            .any()
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setTime(parser.nextDateTime());
+
+        position.setValid(true);
+        position.setLongitude(parser.nextDouble());
+        position.setLatitude(parser.nextDouble());
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble()));
+        position.setCourse(parser.nextDouble());
+        position.setAltitude(parser.nextDouble());
+
+        position.set(Position.KEY_SATELLITES, parser.nextInt());
+        position.set(Position.KEY_INDEX, parser.nextLong());
+        position.set(Position.KEY_INPUT, parser.nextInt());
+        position.set(Position.KEY_OUTPUT, parser.nextInt());
+
+        position.set(Position.PREFIX_ADC + 1, parser.nextDouble());
+        position.set(Position.PREFIX_ADC + 2, parser.nextDouble());
+
+        // J1939 data
+        position.set(Position.KEY_OBD_SPEED, parser.nextInt());
+        position.set(Position.KEY_RPM, parser.nextInt());
+        position.set("coolant", parser.nextInt());
+        position.set(Position.KEY_FUEL_LEVEL, parser.nextInt());
+        position.set(Position.KEY_FUEL_CONSUMPTION, parser.nextInt());
+        position.set(Position.PREFIX_TEMP + 1, parser.nextInt());
+        position.set("chargerPressure", parser.nextInt());
+        position.set("tpl", parser.nextInt());
+        position.set(Position.KEY_AXLE_WEIGHT, parser.nextInt());
+        position.set(Position.KEY_OBD_ODOMETER, parser.nextInt());
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/ItsProtocol.java b/src/main/java/org/traccar/protocol/ItsProtocol.java
new file mode 100644
index 000000000..f53600dc9
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/ItsProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.CharacterDelimiterFrameDecoder;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class ItsProtocol extends BaseProtocol {
+
+    public ItsProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, '*'));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new ItsProtocolDecoder(ItsProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/ItsProtocolDecoder.java b/src/main/java/org/traccar/protocol/ItsProtocolDecoder.java
new file mode 100644
index 000000000..482f34e65
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/ItsProtocolDecoder.java
@@ -0,0 +1,170 @@
+/*
+ * Copyright 2018 - 2019 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class ItsProtocolDecoder extends BaseProtocolDecoder {
+
+    public ItsProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .expression("[^$]*")
+            .text("$")
+            .expression(",?[^,]+,")              // event
+            .groupBegin()
+            .expression("[^,]+,")                // vendor
+            .expression("[^,]+,")                // firmware version
+            .expression("[^,]+,")                // type
+            .number("d+,")
+            .expression("[LH],")                 // history
+            .or()
+            .expression("[^,]+,")                // type
+            .groupEnd()
+            .number("(d{15}),")                  // imei
+            .groupBegin()
+            .expression("(..),")                 // status
+            .or()
+            .expression("[^,]*,")                // vehicle registration
+            .number("([01]),")                   // valid
+            .groupEnd()
+            .number("(dd),?(dd),?(dddd),")       // date (ddmmyyyy)
+            .number("(dd),?(dd),?(dd),")         // time (hhmmss)
+            .expression("([AV]),").optional()    // valid
+            .number("(d+.d+),([NS]),")           // latitude
+            .number("(d+.d+),([EW]),")           // longitude
+            .groupBegin()
+            .number("(d+.?d*),")                 // speed
+            .number("(d+.?d*),")                 // course
+            .number("(d+),")                     // satellites
+            .groupBegin()
+            .number("(d+.?d*),")                 // altitude
+            .number("d+.?d*,")                   // pdop
+            .number("d+.?d*,")                   // hdop
+            .expression("[^,]*,")
+            .number("([01]),")                   // ignition
+            .number("([01]),")                   // charging
+            .number("(d+.?d*),")                 // power
+            .number("(d+.?d*),")                 // battery
+            .number("[01],")                     // emergency
+            .expression("[CO]?,")                // tamper
+            .number("(?:x+,){5}")                // main cell
+            .number("(?:-?x+,){12}")             // other cells
+            .number("([01]{4}),")                // inputs
+            .number("([01]{2}),")                // outputs
+            .groupEnd("?")
+            .or()
+            .number("(-?d+.d+),")                // altitude
+            .number("(d+.d+),")                  // speed
+            .groupEnd()
+            .any()
+            .compile();
+
+    private String decodeAlarm(String status) {
+        switch (status) {
+            case "WD":
+            case "EA":
+                return Position.ALARM_SOS;
+            case "BL":
+                return Position.ALARM_LOW_BATTERY;
+            case "HB":
+                return Position.ALARM_BRAKING;
+            case "HA":
+                return Position.ALARM_ACCELERATION;
+            case "RT":
+                return Position.ALARM_CORNERING;
+            case "OS":
+                return Position.ALARM_OVERSPEED;
+            default:
+                return null;
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        String sentence = (String) msg;
+
+        if (channel != null && sentence.startsWith("$,01,")) {
+            channel.writeAndFlush(new NetworkMessage("$,1,*", remoteAddress));
+        }
+
+        Parser parser = new Parser(PATTERN, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        if (parser.hasNext()) {
+            position.set(Position.KEY_ALARM, decodeAlarm(parser.next()));
+        }
+
+        if (parser.hasNext()) {
+            position.setValid(parser.nextInt() == 1);
+        }
+        position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
+        if (parser.hasNext()) {
+            position.setValid(parser.next().equals("A"));
+        }
+        position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM));
+        position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM));
+
+        if (parser.hasNext(3)) {
+            position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble()));
+            position.setCourse(parser.nextDouble());
+            position.set(Position.KEY_SATELLITES, parser.nextInt());
+        }
+
+        if (parser.hasNext(7)) {
+            position.setAltitude(parser.nextDouble());
+            position.set(Position.KEY_IGNITION, parser.nextInt() > 0);
+            position.set(Position.KEY_CHARGE, parser.nextInt() > 0);
+            position.set(Position.KEY_POWER, parser.nextDouble());
+            position.set(Position.KEY_BATTERY, parser.nextDouble());
+            position.set(Position.KEY_INPUT, parser.nextBinInt());
+            position.set(Position.KEY_OUTPUT, parser.nextBinInt());
+        }
+
+        if (parser.hasNext(2)) {
+            position.setAltitude(parser.nextDouble());
+            position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble()));
+        }
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Ivt401Protocol.java b/src/main/java/org/traccar/protocol/Ivt401Protocol.java
new file mode 100644
index 000000000..fb44e4fe9
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Ivt401Protocol.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import org.traccar.BaseProtocol;
+import org.traccar.CharacterDelimiterFrameDecoder;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class Ivt401Protocol extends BaseProtocol {
+
+    public Ivt401Protocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, ';'));
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new Ivt401ProtocolDecoder(Ivt401Protocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Ivt401ProtocolDecoder.java b/src/main/java/org/traccar/protocol/Ivt401ProtocolDecoder.java
new file mode 100644
index 000000000..63556e7a9
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Ivt401ProtocolDecoder.java
@@ -0,0 +1,183 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class Ivt401ProtocolDecoder extends BaseProtocolDecoder {
+
+    public Ivt401ProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("(")
+            .expression("TL[ABLN],")             // header
+            .number("(d+),")                     // imei
+            .number("(dd)(dd)(dd),")             // date (ddmmyy)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .number("([-+]d+.d+),")              // latitude
+            .number("([-+]d+.d+),")              // longitude
+            .number("(d+),")                     // speed
+            .number("(d+),")                     // course
+            .number("(-?d+.?d*),")               // altitude
+            .number("d+,")                       // satellites or battery status
+            .number("(d),")                      // gps status
+            .number("(d+),")                     // rssi
+            .number("(d+),")                     // input
+            .number("(d+),")                     // output
+            .number("(d+.d+),")                  // adc
+            .number("(d+.d+),")                  // power
+            .number("(d+.d+),")                  // battery
+            .number("(-?d+.?d*),")               // pcb temp
+            .expression("([^,]+),")              // temp
+            .number("(d+),")                     // movement
+            .number("(d+.d+),")                  // acceleration
+            .number("(-?d+),")                   // tilt
+            .number("(d+),")                     // trip
+            .number("(d+),")                     // odometer
+            .groupBegin()
+            .number("([01]),")                   // overspeed
+            .number("[01],")                     // input 2 misuse
+            .number("[01],")                     // immobilizer
+            .number("[01],")                     // temperature alert
+            .number("[0-2]+,")                   // geofence
+            .number("([0-3]),")                  // harsh driving
+            .number("[01],")                     // reconnect
+            .number("([01]),")                   // low battery
+            .number("([01]),")                   // power disconnected
+            .number("[01],")                     // gps failure
+            .number("([01]),")                   // towing
+            .number("[01],")                     // server unreachable
+            .number("[128],")                    // sleep mode
+            .expression("([^,]+)?,")             // driver id
+            .number("d+,")                       // sms count
+            .groupEnd("?")
+            .any()
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
+
+        position.setLatitude(parser.nextDouble());
+        position.setLongitude(parser.nextDouble());
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextInt()));
+        position.setCourse(parser.nextInt());
+        position.setAltitude(parser.nextDouble());
+        position.setValid(parser.nextInt() > 0);
+
+        position.set(Position.KEY_RSSI, parser.nextInt());
+
+        String input = parser.next();
+        for (int i = 0; i < input.length(); i++) {
+            int value = Character.getNumericValue(input.charAt(i));
+            if (value < 2) {
+                position.set(Position.PREFIX_IN + (i + 1), value > 0);
+            }
+        }
+
+        String output = parser.next();
+        for (int i = 0; i < output.length(); i++) {
+            position.set(Position.PREFIX_OUT + (i + 1), Character.getNumericValue(output.charAt(i)) > 0);
+        }
+
+        position.set(Position.PREFIX_ADC + 1, parser.nextDouble());
+        position.set(Position.KEY_POWER, parser.nextDouble());
+        position.set(Position.KEY_BATTERY, parser.nextDouble());
+        position.set(Position.KEY_DEVICE_TEMP, parser.nextDouble());
+
+        String temp = parser.next();
+        if (temp.startsWith("M")) {
+            int index = 1;
+            int startIndex = 1;
+            int endIndex;
+            while (startIndex < temp.length()) {
+                endIndex = temp.indexOf('-', startIndex + 1);
+                if (endIndex < 0) {
+                    endIndex = temp.indexOf('+', startIndex + 1);
+                }
+                if (endIndex < 0) {
+                    endIndex = temp.length();
+                }
+                if (endIndex > 0) {
+                    double value = Double.parseDouble(temp.substring(startIndex, endIndex));
+                    position.set(Position.PREFIX_TEMP + index++, value);
+                }
+                startIndex = endIndex;
+            }
+        } else {
+            position.set(Position.PREFIX_TEMP + 1, Double.parseDouble(temp));
+        }
+
+        position.set(Position.KEY_MOTION, parser.nextInt() > 0);
+        position.set(Position.KEY_ACCELERATION, parser.nextDouble());
+
+        parser.nextInt(); // tilt
+        parser.nextInt(); // trip state
+
+        position.set(Position.KEY_ODOMETER, parser.nextLong());
+
+        if (parser.hasNext(6)) {
+            position.set(Position.KEY_ALARM, parser.nextInt() == 1 ? Position.ALARM_OVERSPEED : null);
+            switch (parser.nextInt()) {
+                case 1:
+                    position.set(Position.KEY_ALARM, Position.ALARM_ACCELERATION);
+                    break;
+                case 2:
+                    position.set(Position.KEY_ALARM, Position.ALARM_BRAKING);
+                    break;
+                case 3:
+                    position.set(Position.KEY_ALARM, Position.ALARM_CORNERING);
+                    break;
+                default:
+                    break;
+            }
+            position.set(Position.KEY_ALARM, parser.nextInt() == 1 ? Position.ALARM_LOW_BATTERY : null);
+            position.set(Position.KEY_ALARM, parser.nextInt() == 1 ? Position.ALARM_POWER_CUT : null);
+            position.set(Position.KEY_ALARM, parser.nextInt() == 1 ? Position.ALARM_TOW : null);
+            position.set(Position.KEY_DRIVER_UNIQUE_ID, parser.next());
+        }
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/JpKorjarFrameDecoder.java b/src/main/java/org/traccar/protocol/JpKorjarFrameDecoder.java
new file mode 100644
index 000000000..0eb65c8ef
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/JpKorjarFrameDecoder.java
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2016 Nyash (nyashh@gmail.com)
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+import org.traccar.BaseFrameDecoder;
+
+public class JpKorjarFrameDecoder extends BaseFrameDecoder {
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+        if (buf.readableBytes() < 80) {
+            return null;
+        }
+
+        int spaceIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) ' ');
+        if (spaceIndex == -1) {
+            return null;
+        }
+
+        int endIndex = buf.indexOf(spaceIndex, buf.writerIndex(), (byte) ',');
+        if (endIndex == -1) {
+            return null;
+        }
+
+        return buf.readRetainedSlice(endIndex + 1);
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/JpKorjarProtocol.java b/src/main/java/org/traccar/protocol/JpKorjarProtocol.java
new file mode 100644
index 000000000..fe5b2480d
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/JpKorjarProtocol.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2016 Nyash (nyashh@gmail.com)
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class JpKorjarProtocol extends BaseProtocol {
+
+    public JpKorjarProtocol() {
+        addServer(new TrackerServer(false, this.getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new JpKorjarFrameDecoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new JpKorjarProtocolDecoder(JpKorjarProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/JpKorjarProtocolDecoder.java b/src/main/java/org/traccar/protocol/JpKorjarProtocolDecoder.java
new file mode 100644
index 000000000..33026918a
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/JpKorjarProtocolDecoder.java
@@ -0,0 +1,89 @@
+/*
+ * Copyright 2016 Nyash (nyashh@gmail.com)
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.CellTower;
+import org.traccar.model.Network;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class JpKorjarProtocolDecoder extends BaseProtocolDecoder {
+
+    public JpKorjarProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("KORJAR.PL,")
+            .number("(d+),")                     // imei
+            .number("(dd)(dd)(dd)")              // date (yymmdd)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .number("(d+.d+)([NS]),")            // latitude
+            .number("(d+.d+)([EW]),")            // longitude
+            .number("(d+.d+),")                  // speed
+            .number("(d+),")                     // course
+            .number("[FL]:(d+.d+)V,")            // battery
+            .number("([01]) ")                   // valid
+            .number("(d+) ")                     // mcc
+            .number("(d+) ")                     // mnc
+            .number("(x+) ")                     // lac
+            .number("(x+),")                     // cid
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setTime(parser.nextDateTime());
+
+        position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM));
+        position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM));
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
+
+        position.set(Position.KEY_BATTERY, parser.nextDouble(0));
+
+        position.setValid(parser.nextInt(0) == 1);
+
+        position.setNetwork(new Network(CellTower.from(
+                parser.nextInt(0), parser.nextInt(0), parser.nextHexInt(0), parser.nextHexInt(0))));
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Jt600FrameDecoder.java b/src/main/java/org/traccar/protocol/Jt600FrameDecoder.java
new file mode 100644
index 000000000..b5d060ecc
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Jt600FrameDecoder.java
@@ -0,0 +1,55 @@
+/*
+ * Copyright 2012 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+import org.traccar.BaseFrameDecoder;
+
+import java.text.ParseException;
+
+public class Jt600FrameDecoder extends BaseFrameDecoder {
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+        if (buf.readableBytes() < 10) {
+            return null;
+        }
+
+        char type = (char) buf.getByte(buf.readerIndex());
+
+        if (type == '$') {
+            boolean longFormat = buf.getUnsignedByte(buf.readerIndex() + 1) == 0x75;
+            int length = buf.getUnsignedShort(buf.readerIndex() + (longFormat ? 8 : 7)) + 10;
+            if (length <= buf.readableBytes()) {
+                return buf.readRetainedSlice(length);
+            }
+        } else if (type == '(') {
+            int endIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) ')');
+            if (endIndex != -1) {
+                return buf.readRetainedSlice(endIndex + 1);
+            }
+        } else {
+            throw new ParseException(null, 0); // unknown message
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Jt600Protocol.java b/src/main/java/org/traccar/protocol/Jt600Protocol.java
new file mode 100644
index 000000000..97c5fa6ce
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Jt600Protocol.java
@@ -0,0 +1,43 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+import org.traccar.model.Command;
+
+public class Jt600Protocol extends BaseProtocol {
+
+    public Jt600Protocol() {
+        setSupportedDataCommands(
+                Command.TYPE_ENGINE_RESUME,
+                Command.TYPE_ENGINE_STOP,
+                Command.TYPE_SET_TIMEZONE,
+                Command.TYPE_REBOOT_DEVICE);
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new Jt600FrameDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new Jt600ProtocolEncoder());
+                pipeline.addLast(new Jt600ProtocolDecoder(Jt600Protocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Jt600ProtocolDecoder.java b/src/main/java/org/traccar/protocol/Jt600ProtocolDecoder.java
new file mode 100644
index 000000000..1351706e2
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Jt600ProtocolDecoder.java
@@ -0,0 +1,375 @@
+/*
+ * Copyright 2012 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.ByteBufUtil;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.BcdUtil;
+import org.traccar.helper.BitBuffer;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.CellTower;
+import org.traccar.model.Network;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.regex.Pattern;
+
+public class Jt600ProtocolDecoder extends BaseProtocolDecoder {
+
+    public Jt600ProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static double convertCoordinate(int raw) {
+        int degrees = raw / 1000000;
+        double minutes = (raw % 1000000) / 10000.0;
+        return degrees + minutes / 60;
+    }
+
+    private void decodeStatus(Position position, ByteBuf buf) {
+
+        int value = buf.readUnsignedByte();
+
+        position.set(Position.KEY_IGNITION, BitUtil.check(value, 0));
+        position.set(Position.KEY_DOOR, BitUtil.check(value, 6));
+
+        value = buf.readUnsignedByte();
+
+        position.set(Position.KEY_CHARGE, BitUtil.check(value, 0));
+        position.set(Position.KEY_BLOCKED, BitUtil.check(value, 1));
+
+        if (BitUtil.check(value, 2)) {
+            position.set(Position.KEY_ALARM, Position.ALARM_SOS);
+        }
+        if (BitUtil.check(value, 3) || BitUtil.check(value, 4)) {
+            position.set(Position.KEY_ALARM, Position.ALARM_GPS_ANTENNA_CUT);
+        }
+        if (BitUtil.check(value, 4)) {
+            position.set(Position.KEY_ALARM, Position.ALARM_OVERSPEED);
+        }
+
+        value = buf.readUnsignedByte();
+
+        if (BitUtil.check(value, 2)) {
+            position.set(Position.KEY_ALARM, Position.ALARM_FATIGUE_DRIVING);
+        }
+        if (BitUtil.check(value, 3)) {
+            position.set(Position.KEY_ALARM, Position.ALARM_TOW);
+        }
+
+        buf.readUnsignedByte(); // reserved
+
+    }
+
+    private List<Position> decodeBinary(ByteBuf buf, Channel channel, SocketAddress remoteAddress) {
+
+        List<Position> positions = new LinkedList<>();
+
+        buf.readByte(); // header
+
+        boolean longFormat = buf.getUnsignedByte(buf.readerIndex()) == 0x75;
+
+        String id = String.valueOf(Long.parseLong(ByteBufUtil.hexDump(buf.readSlice(5))));
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, id);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        int protocolVersion = 0;
+        if (longFormat) {
+            protocolVersion = buf.readUnsignedByte();
+        }
+
+        int version = BitUtil.from(buf.readUnsignedByte(), 4);
+        buf.readUnsignedShort(); // length
+
+        while (buf.readableBytes() > 1) {
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            DateBuilder dateBuilder = new DateBuilder()
+                    .setDay(BcdUtil.readInteger(buf, 2))
+                    .setMonth(BcdUtil.readInteger(buf, 2))
+                    .setYear(BcdUtil.readInteger(buf, 2))
+                    .setHour(BcdUtil.readInteger(buf, 2))
+                    .setMinute(BcdUtil.readInteger(buf, 2))
+                    .setSecond(BcdUtil.readInteger(buf, 2));
+            position.setTime(dateBuilder.getDate());
+
+            double latitude = convertCoordinate(BcdUtil.readInteger(buf, 8));
+            double longitude = convertCoordinate(BcdUtil.readInteger(buf, 9));
+
+            byte flags = buf.readByte();
+            position.setValid((flags & 0x1) == 0x1);
+            if ((flags & 0x2) == 0) {
+                latitude = -latitude;
+            }
+            position.setLatitude(latitude);
+            if ((flags & 0x4) == 0) {
+                longitude = -longitude;
+            }
+            position.setLongitude(longitude);
+
+            position.setSpeed(BcdUtil.readInteger(buf, 2));
+            position.setCourse(buf.readUnsignedByte() * 2.0);
+
+            if (longFormat) {
+
+                position.set(Position.KEY_ODOMETER, buf.readUnsignedInt() * 1000);
+                position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
+
+                buf.readUnsignedInt(); // vehicle id combined
+
+                int status = buf.readUnsignedShort();
+                position.set(Position.KEY_ALARM, BitUtil.check(status, 1) ? Position.ALARM_GEOFENCE_ENTER : null);
+                position.set(Position.KEY_ALARM, BitUtil.check(status, 2) ? Position.ALARM_GEOFENCE_EXIT : null);
+                position.set(Position.KEY_ALARM, BitUtil.check(status, 3) ? Position.ALARM_POWER_CUT : null);
+                position.set(Position.KEY_ALARM, BitUtil.check(status, 4) ? Position.ALARM_VIBRATION : null);
+                position.set(Position.KEY_BLOCKED, BitUtil.check(status, 7));
+                position.set(Position.KEY_ALARM, BitUtil.check(status, 8 + 3) ? Position.ALARM_LOW_BATTERY : null);
+                position.set(Position.KEY_ALARM, BitUtil.check(status, 8 + 6) ? Position.ALARM_FAULT : null);
+                position.set(Position.KEY_STATUS, status);
+
+                int battery = buf.readUnsignedByte();
+                if (battery == 0xff) {
+                    position.set(Position.KEY_CHARGE, true);
+                } else {
+                    position.set(Position.KEY_BATTERY_LEVEL, battery);
+                }
+
+                CellTower cellTower = CellTower.fromCidLac(buf.readUnsignedShort(), buf.readUnsignedShort());
+                cellTower.setSignalStrength((int) buf.readUnsignedByte());
+                position.setNetwork(new Network(cellTower));
+
+                if (protocolVersion == 0x17) {
+                    buf.readUnsignedByte(); // geofence id
+                    buf.skipBytes(3); // reserved
+                }
+
+            } else if (version == 1) {
+
+                position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
+                position.set(Position.KEY_POWER, buf.readUnsignedByte());
+
+                buf.readByte(); // other flags and sensors
+
+                position.setAltitude(buf.readUnsignedShort());
+
+                int cid = buf.readUnsignedShort();
+                int lac = buf.readUnsignedShort();
+                int rssi = buf.readUnsignedByte();
+
+                if (cid != 0 && lac != 0) {
+                    CellTower cellTower = CellTower.fromCidLac(cid, lac);
+                    cellTower.setSignalStrength(rssi);
+                    position.setNetwork(new Network(cellTower));
+                } else {
+                    position.set(Position.KEY_RSSI, rssi);
+                }
+
+            } else if (version == 2) {
+
+                int fuel = buf.readUnsignedByte() << 8;
+
+                decodeStatus(position, buf);
+                position.set(Position.KEY_ODOMETER, buf.readUnsignedInt() * 1000);
+
+                fuel += buf.readUnsignedByte();
+                position.set(Position.KEY_FUEL_LEVEL, fuel);
+
+            } else if (version == 3) {
+
+                BitBuffer bitBuffer = new BitBuffer(buf);
+
+                position.set("fuel1", bitBuffer.readUnsigned(12));
+                position.set("fuel2", bitBuffer.readUnsigned(12));
+                position.set("fuel3", bitBuffer.readUnsigned(12));
+                position.set(Position.KEY_ODOMETER, bitBuffer.readUnsigned(20) * 1000);
+
+                int status = bitBuffer.readUnsigned(24);
+                position.set(Position.KEY_IGNITION, BitUtil.check(status, 0));
+                position.set(Position.KEY_STATUS, status);
+
+            }
+
+            positions.add(position);
+
+        }
+
+        buf.readUnsignedByte(); // index
+
+        return positions;
+    }
+
+    private static final Pattern PATTERN_W01 = new PatternBuilder()
+            .text("(")
+            .number("(d+),")                     // id
+            .text("W01,")                        // type
+            .number("(ddd)(dd.dddd),")           // longitude
+            .expression("([EW]),")
+            .number("(dd)(dd.dddd),")            // latitude
+            .expression("([NS]),")
+            .expression("([AV]),")               // validity
+            .number("(dd)(dd)(dd),")             // date (ddmmyy)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .number("(d+),")                     // speed
+            .number("(d+),")                     // course
+            .number("(d+),")                     // power
+            .number("(d+),")                     // gps signal
+            .number("(d+),")                     // gsm signal
+            .number("(d+),")                     // alert type
+            .any()
+            .compile();
+
+    private Position decodeW01(String sentence, Channel channel, SocketAddress remoteAddress) {
+
+        Parser parser = new Parser(PATTERN_W01, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setLongitude(parser.nextCoordinate());
+        position.setLatitude(parser.nextCoordinate());
+        position.setValid(parser.next().equals("A"));
+
+        position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
+
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
+        position.setCourse(parser.nextDouble(0));
+
+        position.set(Position.KEY_POWER, parser.nextDouble(0));
+        position.set(Position.KEY_GPS, parser.nextInt(0));
+        position.set(Position.KEY_RSSI, parser.nextInt(0));
+        position.set("alertType", parser.nextInt(0));
+
+        return position;
+    }
+
+    private static final Pattern PATTERN_U01 = new PatternBuilder()
+            .text("(")
+            .number("(d+),")                     // id
+            .number("(Udd),")                    // type
+            .number("d+,").optional()            // alarm
+            .number("(dd)(dd)(dd),")             // date (ddmmyy)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .expression("([TF]),")               // validity
+            .number("(d+.d+),([NS]),")           // latitude
+            .number("(d+.d+),([EW]),")           // longitude
+            .number("(d+.?d*),")                 // speed
+            .number("(d+),")                     // course
+            .number("(d+),")                     // satellites
+            .number("(d+)%,")                    // battery
+            .expression("([01]+),")              // status
+            .number("(d+),")                     // cid
+            .number("(d+),")                     // lac
+            .number("(d+),")                     // gsm signal
+            .number("(d+),")                     // odometer
+            .number("(d+)")                      // serial number
+            .number(",(xx)").optional()          // checksum
+            .any()
+            .compile();
+
+    private Position decodeU01(String sentence, Channel channel, SocketAddress remoteAddress) {
+
+        Parser parser = new Parser(PATTERN_U01, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        String type = parser.next();
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
+
+        position.setValid(parser.next().equals("T"));
+        position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM));
+        position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM));
+
+        position.setSpeed(UnitsConverter.knotsFromMph(parser.nextDouble(0)));
+        position.setCourse(parser.nextDouble(0));
+
+        position.set(Position.KEY_SATELLITES, parser.nextInt(0));
+        position.set(Position.KEY_BATTERY_LEVEL, parser.nextInt(0));
+        position.set(Position.KEY_STATUS, parser.nextBinInt(0));
+
+        CellTower cellTower = CellTower.fromCidLac(parser.nextInt(0), parser.nextInt(0));
+        cellTower.setSignalStrength(parser.nextInt(0));
+        position.setNetwork(new Network(cellTower));
+
+        position.set(Position.KEY_ODOMETER, parser.nextLong(0) * 1000);
+        position.set(Position.KEY_INDEX, parser.nextInt(0));
+
+        if (channel != null) {
+            if (type.equals("U01") || type.equals("U02") || type.equals("U03")) {
+                channel.writeAndFlush(new NetworkMessage("(S39)", remoteAddress));
+            } else if (type.equals("U06")) {
+                channel.writeAndFlush(new NetworkMessage("(S20)", remoteAddress));
+            }
+        }
+
+        return position;
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+        char first = (char) buf.getByte(0);
+
+        if (first == '$') {
+            return decodeBinary(buf, channel, remoteAddress);
+        } else if (first == '(') {
+            String sentence = buf.toString(StandardCharsets.US_ASCII);
+            if (sentence.contains("W01")) {
+                return decodeW01(sentence, channel, remoteAddress);
+            } else {
+                return decodeU01(sentence, channel, remoteAddress);
+            }
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Jt600ProtocolEncoder.java b/src/main/java/org/traccar/protocol/Jt600ProtocolEncoder.java
new file mode 100644
index 000000000..fe5c63c32
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Jt600ProtocolEncoder.java
@@ -0,0 +1,43 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import java.util.TimeZone;
+
+import org.traccar.StringProtocolEncoder;
+import org.traccar.model.Command;
+
+public class Jt600ProtocolEncoder extends StringProtocolEncoder {
+
+    @Override
+    protected Object encodeCommand(Command command) {
+
+        switch (command.getType()) {
+            case Command.TYPE_ENGINE_STOP:
+                return "(S07,0)";
+            case Command.TYPE_ENGINE_RESUME:
+                return "(S07,1)";
+            case Command.TYPE_SET_TIMEZONE:
+                int offset = TimeZone.getTimeZone(command.getString(Command.KEY_TIMEZONE)).getRawOffset() / 60000;
+                return "(S09,1," + offset + ")";
+            case Command.TYPE_REBOOT_DEVICE:
+                return "(S17)";
+            default:
+                return null;
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/KenjiProtocol.java b/src/main/java/org/traccar/protocol/KenjiProtocol.java
new file mode 100644
index 000000000..90c0c511c
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/KenjiProtocol.java
@@ -0,0 +1,40 @@
+/*
+ * Copyright 2016 Carlos Alvarez (carlos.alvarez.rozas@gmail.com)
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LineBasedFrameDecoder;
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class KenjiProtocol extends BaseProtocol {
+
+    public KenjiProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LineBasedFrameDecoder(1024));
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new KenjiProtocolDecoder(KenjiProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/KenjiProtocolDecoder.java b/src/main/java/org/traccar/protocol/KenjiProtocolDecoder.java
new file mode 100644
index 000000000..63812242a
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/KenjiProtocolDecoder.java
@@ -0,0 +1,110 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class KenjiProtocolDecoder extends BaseProtocolDecoder {
+
+    public KenjiProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text(">")
+            .number("C(d{6}),")                  // device id
+            .number("M(x{6}),")                  // alarm
+            .number("O(x{4}),")                  // output
+            .number("I(x{4}),")                  // input
+            .number("D(dd)(dd)(dd),")            // time (hhmmss)
+            .expression("([AV]),")               // valid
+            .number("([NS])(dd)(dd.d+),")        // latitude
+            .number("([EW])(ddd)(dd.d+),")       // longitude
+            .number("T(d+.d+),")                 // speed
+            .number("H(d+.d+),")                 // course
+            .number("Y(dd)(dd)(dd),")            // date (ddmmyy)
+            .number("G(d+)")                     // satellites
+            .any()
+            .compile();
+
+    private String decodeAlarm(int value) {
+        if (BitUtil.check(value, 2)) {
+            return Position.ALARM_SOS;
+        }
+        if (BitUtil.check(value, 4)) {
+            return Position.ALARM_LOW_BATTERY;
+        }
+        if (BitUtil.check(value, 6)) {
+            return Position.ALARM_MOVEMENT;
+        }
+        if (BitUtil.check(value, 1) || BitUtil.check(value, 10) || BitUtil.check(value, 11)) {
+            return Position.ALARM_VIBRATION;
+        }
+
+        return null;
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.set(Position.KEY_ALARM, decodeAlarm(parser.nextHexInt(0)));
+        position.set(Position.KEY_OUTPUT, parser.nextHexInt(0));
+        position.set(Position.KEY_INPUT, parser.nextHexInt(0));
+
+        DateBuilder dateBuilder = new DateBuilder()
+                .setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+
+        position.setValid(parser.next().equals("A"));
+
+        position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN));
+        position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN));
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
+
+        dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+        position.setTime(dateBuilder.getDate());
+
+        position.set(Position.KEY_SATELLITES, parser.nextInt(0));
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/KhdProtocol.java b/src/main/java/org/traccar/protocol/KhdProtocol.java
new file mode 100644
index 000000000..cec7158ed
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/KhdProtocol.java
@@ -0,0 +1,40 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LengthFieldBasedFrameDecoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+import org.traccar.model.Command;
+
+public class KhdProtocol extends BaseProtocol {
+
+    public KhdProtocol() {
+        setSupportedDataCommands(
+                Command.TYPE_ENGINE_STOP,
+                Command.TYPE_ENGINE_RESUME);
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LengthFieldBasedFrameDecoder(512, 3, 2));
+                pipeline.addLast(new KhdProtocolEncoder());
+                pipeline.addLast(new KhdProtocolDecoder(KhdProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/KhdProtocolDecoder.java b/src/main/java/org/traccar/protocol/KhdProtocolDecoder.java
new file mode 100644
index 000000000..0dd5b085a
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/KhdProtocolDecoder.java
@@ -0,0 +1,157 @@
+/*
+ * Copyright 2014 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.BcdUtil;
+import org.traccar.helper.Checksum;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+
+public class KhdProtocolDecoder extends BaseProtocolDecoder {
+
+    public KhdProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private String readSerialNumber(ByteBuf buf) {
+        int b1 = buf.readUnsignedByte();
+        int b2 = buf.readUnsignedByte() - 0x80;
+        int b3 = buf.readUnsignedByte() - 0x80;
+        int b4 = buf.readUnsignedByte();
+        return String.format("%02d%02d%02d%02d", b1, b2, b3, b4);
+    }
+
+    public static final int MSG_LOGIN = 0xB1;
+    public static final int MSG_CONFIRMATION = 0x21;
+    public static final int MSG_ON_DEMAND = 0x81;
+    public static final int MSG_POSITION_UPLOAD = 0x80;
+    public static final int MSG_POSITION_REUPLOAD = 0x8E;
+    public static final int MSG_ALARM = 0x82;
+    public static final int MSG_ADMIN_NUMBER = 0x83;
+    public static final int MSG_SEND_TEXT = 0x84;
+    public static final int MSG_REPLY = 0x85;
+    public static final int MSG_SMS_ALARM_SWITCH = 0x86;
+    public static final int MSG_PERIPHERAL = 0xA3;
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        buf.skipBytes(2); // header
+        int type = buf.readUnsignedByte();
+        buf.readUnsignedShort(); // size
+
+        if (type == MSG_LOGIN || type == MSG_ADMIN_NUMBER || type == MSG_SEND_TEXT
+                || type == MSG_SMS_ALARM_SWITCH || type == MSG_POSITION_REUPLOAD) {
+
+            ByteBuf response = Unpooled.buffer();
+            response.writeByte(0x29);
+            response.writeByte(0x29); // header
+            response.writeByte(MSG_CONFIRMATION);
+            response.writeShort(5); // size
+            response.writeByte(buf.getByte(buf.writerIndex() - 2));
+            response.writeByte(type);
+            response.writeByte(buf.writerIndex() > 9 ? buf.getByte(9) : 0); // 10th byte
+            response.writeByte(Checksum.xor(response.nioBuffer()));
+            response.writeByte(0x0D); // ending
+
+            if (channel != null) {
+                channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
+            }
+
+        }
+
+        if (type == MSG_ON_DEMAND || type == MSG_POSITION_UPLOAD || type == MSG_POSITION_REUPLOAD
+                || type == MSG_ALARM || type == MSG_REPLY || type == MSG_PERIPHERAL) {
+
+            Position position = new Position(getProtocolName());
+
+            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, readSerialNumber(buf));
+            if (deviceSession == null) {
+                return null;
+            }
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            DateBuilder dateBuilder = new DateBuilder()
+                    .setYear(BcdUtil.readInteger(buf, 2))
+                    .setMonth(BcdUtil.readInteger(buf, 2))
+                    .setDay(BcdUtil.readInteger(buf, 2))
+                    .setHour(BcdUtil.readInteger(buf, 2))
+                    .setMinute(BcdUtil.readInteger(buf, 2))
+                    .setSecond(BcdUtil.readInteger(buf, 2));
+            position.setTime(dateBuilder.getDate());
+
+            position.setLatitude(BcdUtil.readCoordinate(buf));
+            position.setLongitude(BcdUtil.readCoordinate(buf));
+            position.setSpeed(UnitsConverter.knotsFromKph(BcdUtil.readInteger(buf, 4)));
+            position.setCourse(BcdUtil.readInteger(buf, 4));
+            position.setValid((buf.readUnsignedByte() & 0x80) != 0);
+
+            if (type != MSG_ALARM) {
+
+                position.set(Position.KEY_ODOMETER, buf.readUnsignedMedium());
+                position.set(Position.KEY_STATUS, buf.readUnsignedInt());
+                position.set(Position.KEY_HDOP, buf.readUnsignedByte());
+                position.set(Position.KEY_VDOP, buf.readUnsignedByte());
+                position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
+
+                buf.skipBytes(5); // other location data
+
+                if (type == MSG_PERIPHERAL) {
+
+                    buf.readUnsignedShort(); // data length
+
+                    int dataType = buf.readUnsignedByte();
+
+                    buf.readUnsignedByte(); // content length
+
+                    switch (dataType) {
+                        case 0x01:
+                            position.set(Position.KEY_FUEL_LEVEL,
+                                    buf.readUnsignedByte() * 100 + buf.readUnsignedByte());
+                            break;
+                        case 0x02:
+                            position.set(Position.PREFIX_TEMP + 1,
+                                    buf.readUnsignedByte() * 100 + buf.readUnsignedByte());
+                            break;
+                        default:
+                            break;
+                    }
+
+                }
+
+            }
+
+            return position;
+
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/KhdProtocolEncoder.java b/src/main/java/org/traccar/protocol/KhdProtocolEncoder.java
new file mode 100644
index 000000000..c66129283
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/KhdProtocolEncoder.java
@@ -0,0 +1,67 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import org.traccar.BaseProtocolEncoder;
+import org.traccar.helper.Checksum;
+import org.traccar.model.Command;
+
+public class KhdProtocolEncoder extends BaseProtocolEncoder {
+
+    public static final int MSG_CUT_OIL = 0x39;
+    public static final int MSG_RESUME_OIL = 0x38;
+
+    private ByteBuf encodeCommand(int command, String uniqueId) {
+
+        ByteBuf buf = Unpooled.buffer();
+
+        buf.writeByte(0x29);
+        buf.writeByte(0x29);
+
+        buf.writeByte(command);
+        buf.writeShort(6); // size
+
+        uniqueId = "00000000".concat(uniqueId);
+        uniqueId = uniqueId.substring(uniqueId.length() - 8);
+        buf.writeByte(Integer.parseInt(uniqueId.substring(0, 2)));
+        buf.writeByte(Integer.parseInt(uniqueId.substring(2, 4)) + 0x80);
+        buf.writeByte(Integer.parseInt(uniqueId.substring(4, 6)) + 0x80);
+        buf.writeByte(Integer.parseInt(uniqueId.substring(6, 8)));
+
+        buf.writeByte(Checksum.xor(buf.nioBuffer()));
+        buf.writeByte(0x0D); // ending
+
+        return buf;
+    }
+
+    @Override
+    protected Object encodeCommand(Command command) {
+
+        String uniqueId = getUniqueId(command.getDeviceId());
+
+        switch (command.getType()) {
+            case Command.TYPE_ENGINE_STOP:
+                return encodeCommand(MSG_CUT_OIL, uniqueId);
+            case Command.TYPE_ENGINE_RESUME:
+                return encodeCommand(MSG_RESUME_OIL, uniqueId);
+            default:
+                return null;
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/L100FrameDecoder.java b/src/main/java/org/traccar/protocol/L100FrameDecoder.java
new file mode 100644
index 000000000..158461895
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/L100FrameDecoder.java
@@ -0,0 +1,90 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+import org.traccar.BaseFrameDecoder;
+
+import java.nio.charset.StandardCharsets;
+
+public class L100FrameDecoder extends BaseFrameDecoder {
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+        if (buf.readableBytes() < 10) {
+            return null;
+        }
+
+        if (buf.getCharSequence(buf.readerIndex(), 4, StandardCharsets.US_ASCII).toString().equals("ATL,")) {
+            return decodeNew(buf);
+        } else {
+            return decodeOld(buf);
+        }
+    }
+
+    private Object decodeOld(ByteBuf buf) {
+
+        int header = buf.getByte(buf.readerIndex());
+        boolean obd = header == 'L' || header == 'H';
+
+        int index;
+        if (obd) {
+            index = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '*');
+        } else {
+            index = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) 0x02);
+            if (index < 0) {
+                index = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) 0x04);
+                if (index < 0) {
+                    return null;
+                }
+            }
+        }
+
+        index += 2; // checksum
+
+        if (buf.writerIndex() >= index) {
+            if (!obd) {
+                buf.skipBytes(2); // header
+            }
+            ByteBuf frame = buf.readRetainedSlice(index - buf.readerIndex() - 2);
+            buf.skipBytes(2); // footer
+            return frame;
+        }
+
+        return null;
+    }
+
+    private Object decodeNew(ByteBuf buf) {
+
+        int index = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '@');
+        if (index < 0) {
+            return null;
+        }
+
+        if (buf.writerIndex() >= index + 1) {
+            ByteBuf frame = buf.readRetainedSlice(index - buf.readerIndex());
+            buf.skipBytes(1); // delimiter
+            return frame;
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/L100Protocol.java b/src/main/java/org/traccar/protocol/L100Protocol.java
new file mode 100644
index 000000000..942029307
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/L100Protocol.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class L100Protocol extends BaseProtocol {
+
+    public L100Protocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new L100FrameDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new L100ProtocolDecoder(L100Protocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/L100ProtocolDecoder.java b/src/main/java/org/traccar/protocol/L100ProtocolDecoder.java
new file mode 100644
index 000000000..9868de435
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/L100ProtocolDecoder.java
@@ -0,0 +1,341 @@
+/*
+ * Copyright 2016 - 2019 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.Checksum;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.ObdDecoder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.CellTower;
+import org.traccar.model.Network;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class L100ProtocolDecoder extends BaseProtocolDecoder {
+
+    public L100ProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("ATL")
+            .expression(",[^,]+,").optional()
+            .number("(d{15}),")                  // imei
+            .text("$GPRMC,")
+            .number("(dd)(dd)(dd)")              // time (hhmmss.sss)
+            .number(".(ddd)").optional()
+            .expression(",([AV]),")              // validity
+            .number("(d+)(dd.d+),")              // latitude
+            .expression("([NS]),")
+            .number("(d+)(dd.d+),")              // longitude
+            .expression("([EW]),")
+            .number("(d+.?d*)?,")                // speed
+            .number("(d+.?d*)?,")                // course
+            .number("(dd)(dd)(dd),")             // date (ddmmyy)
+            .any()
+            .text("#")
+            .number("([01]+),")                  // io status
+            .number("(d+.?d*|N.C),")             // adc
+            .expression("[^,]*,")                // reserved
+            .expression("[^,]*,")                // reserved
+            .number("(d+.?d*),")                 // odometer
+            .number("(d+.?d*),")                 // temperature
+            .number("(d+.?d*),")                 // battery
+            .number("(d+),")                     // rssi
+            .number("(d+),")                     // mcc
+            .number("(d+),")                     // mnc
+            .number("(x+),")                     // lac
+            .number("(x+)")                      // cid
+            .any()
+            .text("ATL")
+            .compile();
+
+    private static final Pattern PATTERN_OBD_LOCATION = new PatternBuilder()
+            .expression("[LH],")                 // archive
+            .text("ATL,")
+            .number("(d{15}),")                  // imei
+            .number("(d+),")                     // type
+            .number("(d+),")                     // index
+            .groupBegin()
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .number("(dd)(dd)(dd),")             // date (ddmmyy)
+            .expression("([AV]),")               // validity
+            .number("(d+.d+);([NS]),")           // latitude
+            .number("(d+.d+);([EW]),")           // longitude
+            .number("(d+),")                     // speed
+            .number("(d+),")                     // course
+            .number("(d+.d+),")                  // odometer
+            .number("(d+.d+),")                  // battery
+            .number("(d+),")                     // rssi
+            .number("(d+),")                     // mcc
+            .number("(d+),")                     // mnc
+            .number("(d+),")                     // lac
+            .number("(x+),")                     // cid
+            .number("#(d)(d)(d)(d),")            // status
+            .number("(d),")                      // overspeed
+            .text("ATL,")
+            .groupEnd("?")
+            .compile();
+
+    private static final Pattern PATTERN_OBD_DATA = new PatternBuilder()
+            .expression("[LH],")                 // archive
+            .text("ATLOBD,")
+            .number("(d{15}),")                  // imei
+            .number("d+,")                       // type
+            .number("d+,")                       // index
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .number("(dd)(dd)(dd),")             // date (ddmmyy)
+            .expression("[^,]+,")                // obd protocol
+            .expression("(.+)")                  // data
+            .compile();
+
+    private static final Pattern PATTERN_NEW = new PatternBuilder()
+            .groupBegin()
+            .text("ATL,")
+            .expression("[LH],")                 // archive
+            .number("(d{15}),")                  // imei
+            .groupEnd("?")
+            .expression("([NPT]),")              // alarm
+            .number("(dd)(dd)(dd),")             // date (ddmmyy)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .expression("([AV]),")               // validity
+            .number("(d+.d+),([NS]),")           // latitude
+            .number("(d+.d+),([EW]),")           // longitude
+            .number("(d+.?d*),")                 // speed
+            .expression("(?:GPS|GSM|INV),")
+            .number("(d+),")                     // battery
+            .number("(d+),")                     // mcc
+            .number("(d+),")                     // mnc
+            .number("(d+),")                     // lac
+            .number("(d+)")                      // cid
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        String sentence = (String) msg;
+
+        if (sentence.startsWith("L") || sentence.startsWith("H")) {
+            if (sentence.substring(2, 8).equals("ATLOBD")) {
+                return decodeObdData(channel, remoteAddress, sentence);
+            } else {
+                return decodeObdLocation(channel, remoteAddress, sentence);
+            }
+        } else if (!sentence.contains("$GPRMC")) {
+            return decodeNew(channel, remoteAddress, sentence);
+        } else {
+            return decodeNormal(channel, remoteAddress, sentence);
+        }
+    }
+
+    private Object decodeNormal(Channel channel, SocketAddress remoteAddress, String sentence) {
+
+        Parser parser = new Parser(PATTERN, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        DateBuilder dateBuilder = new DateBuilder()
+                .setTime(parser.nextInt(), parser.nextInt(), parser.nextInt(), parser.nextInt(0));
+
+        position.setValid(parser.next().equals("A"));
+        position.setLatitude(parser.nextCoordinate());
+        position.setLongitude(parser.nextCoordinate());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
+
+        dateBuilder.setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt());
+        position.setTime(dateBuilder.getDate());
+
+        position.set(Position.KEY_STATUS, parser.next());
+        position.set(Position.PREFIX_ADC + 1, parser.next());
+        position.set(Position.KEY_ODOMETER, parser.nextDouble());
+        position.set(Position.PREFIX_TEMP + 1, parser.nextDouble());
+        position.set(Position.KEY_BATTERY, parser.nextDouble());
+
+        int rssi = parser.nextInt();
+        if (rssi > 0) {
+            position.setNetwork(new Network(CellTower.from(
+                    parser.nextInt(), parser.nextInt(), parser.nextHexInt(), parser.nextHexInt(), rssi)));
+        }
+
+        if (channel != null) {
+            channel.writeAndFlush(new NetworkMessage(String.valueOf((char) 0x01), remoteAddress));
+        }
+
+        return position;
+    }
+
+    private Object decodeObdLocation(Channel channel, SocketAddress remoteAddress, String sentence) {
+
+        Parser parser = new Parser(PATTERN_OBD_LOCATION, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        String imei = parser.next();
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        int type = parser.nextInt();
+        int index = parser.nextInt();
+
+        if (type == 1) {
+            if (channel != null) {
+                String response = "@" + imei + ",00," + index + ",";
+                response += "*" + (char) Checksum.xor(response);
+                channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
+            }
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setTime(parser.nextDateTime(Parser.DateTimeFormat.HMS_DMY));
+        position.setValid(parser.next().equals("A"));
+        position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM));
+        position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM));
+        position.setSpeed(parser.nextInt());
+        position.setCourse(parser.nextInt());
+
+        position.set(Position.KEY_ODOMETER, parser.nextDouble() * 1000);
+        position.set(Position.KEY_BATTERY, parser.nextDouble());
+
+        int rssi = parser.nextInt();
+        position.setNetwork(new Network(CellTower.from(
+                parser.nextInt(), parser.nextInt(), parser.nextInt(), parser.nextHexInt(), rssi)));
+
+        position.set(Position.KEY_IGNITION, parser.nextInt() == 1);
+        parser.next(); // reserved
+
+        switch (parser.nextInt()) {
+            case 0:
+                position.set(Position.KEY_ALARM, Position.ALARM_BRAKING);
+                break;
+            case 2:
+                position.set(Position.KEY_ALARM, Position.ALARM_ACCELERATION);
+                break;
+            case 1:
+                position.set(Position.KEY_ALARM, Position.ALARM_GENERAL);
+                break;
+            default:
+                break;
+        }
+
+        position.set(Position.KEY_CHARGE, parser.nextInt() == 1);
+
+        if (parser.nextInt() == 1) {
+            position.set(Position.KEY_ALARM, Position.ALARM_OVERSPEED);
+        }
+
+        return position;
+    }
+
+    private Object decodeObdData(Channel channel, SocketAddress remoteAddress, String sentence) {
+
+        Parser parser = new Parser(PATTERN_OBD_DATA, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        getLastLocation(position, parser.nextDateTime(Parser.DateTimeFormat.HMS_DMY));
+
+        for (String entry : parser.next().split(",")) {
+            String[] values = entry.split(":");
+            if (values.length == 2 && values[1].charAt(0) != 'X') {
+                position.add(ObdDecoder.decodeData(
+                        Integer.parseInt(values[0].substring(2), 16), Integer.parseInt(values[1], 16), true));
+            }
+        }
+
+        return position;
+    }
+
+    private Object decodeNew(Channel channel, SocketAddress remoteAddress, String sentence) {
+
+        Parser parser = new Parser(PATTERN_NEW, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        String imei = parser.next();
+        DeviceSession deviceSession;
+        if (imei != null) {
+            deviceSession = getDeviceSession(channel, remoteAddress, imei);
+        } else {
+            deviceSession = getDeviceSession(channel, remoteAddress);
+        }
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        switch (parser.next()) {
+            case "P":
+                position.set(Position.KEY_ALARM, Position.ALARM_SOS);
+                break;
+            case "T":
+                position.set(Position.KEY_ALARM, Position.ALARM_TAMPERING);
+                break;
+            default:
+                break;
+        }
+
+        position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
+        position.setValid(parser.next().equals("A"));
+        position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM));
+        position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM));
+        position.setSpeed(parser.nextDouble());
+
+        position.set(Position.KEY_BATTERY, parser.nextInt() * 0.001);
+
+        position.setNetwork(new Network(CellTower.from(
+                parser.nextInt(), parser.nextInt(), parser.nextInt(), parser.nextHexInt())));
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/LaipacProtocol.java b/src/main/java/org/traccar/protocol/LaipacProtocol.java
new file mode 100644
index 000000000..923b08a16
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/LaipacProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LineBasedFrameDecoder;
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class LaipacProtocol extends BaseProtocol {
+
+    public LaipacProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LineBasedFrameDecoder(1024));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new LaipacProtocolDecoder(LaipacProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/LaipacProtocolDecoder.java b/src/main/java/org/traccar/protocol/LaipacProtocolDecoder.java
new file mode 100644
index 000000000..2f3cbb1b9
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/LaipacProtocolDecoder.java
@@ -0,0 +1,167 @@
+/*
+ * Copyright 2013 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.Checksum;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.CellTower;
+import org.traccar.model.Network;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class LaipacProtocolDecoder extends BaseProtocolDecoder {
+
+    public LaipacProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("$AVRMC,")
+            .expression("([^,]+),")              // identifier
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .expression("([AVRPavrp]),")         // validity
+            .number("(dd)(dd.d+),")              // latitude
+            .expression("([NS]),")
+            .number("(ddd)(dd.d+),")             // longitude
+            .number("([EW]),")
+            .number("(d+.d+),")                  // speed
+            .number("(d+.d+),")                  // course
+            .number("(dd)(dd)(dd),")             // date (ddmmyy)
+            .expression("([abZXTSMHFE86430]),")  // event code
+            .expression("([\\d.]+),")            // battery voltage
+            .number("(d+),")                     // current mileage
+            .number("(d),")                      // gps status
+            .number("(d+),")                     // adc1
+            .number("(d+)")                      // adc2
+            .number(",(xxxx)")                   // lac
+            .number("(xxxx),")                   // cid
+            .number("(ddd)")                     // mcc
+            .number("(ddd)")                     // mnc
+            .optional(4)
+            .text("*")
+            .number("(xx)")                      // checksum
+            .compile();
+
+    private String decodeAlarm(String event) {
+        switch (event) {
+            case "Z":
+                return Position.ALARM_LOW_BATTERY;
+            case "X":
+                return Position.ALARM_GEOFENCE_ENTER;
+            case "T":
+                return Position.ALARM_TAMPERING;
+            case "H":
+                return Position.ALARM_POWER_OFF;
+            case "8":
+                return Position.ALARM_SHOCK;
+            case "7":
+            case "4":
+                return Position.ALARM_GEOFENCE_EXIT;
+            case "6":
+                return Position.ALARM_OVERSPEED;
+            case "3":
+                return Position.ALARM_SOS;
+            default:
+                return null;
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        String sentence = (String) msg;
+
+        if (sentence.startsWith("$ECHK") && channel != null) {
+            channel.writeAndFlush(new NetworkMessage(sentence + "\r\n", remoteAddress)); // heartbeat
+            return null;
+        }
+
+        Parser parser = new Parser(PATTERN, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        DateBuilder dateBuilder = new DateBuilder()
+                .setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+
+        String status = parser.next();
+        String upperCaseStatus = status.toUpperCase();
+        position.setValid(upperCaseStatus.equals("A") || upperCaseStatus.equals("R") || upperCaseStatus.equals("P"));
+        position.set(Position.KEY_STATUS, status);
+
+        position.setLatitude(parser.nextCoordinate());
+        position.setLongitude(parser.nextCoordinate());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
+
+        dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+        position.setTime(dateBuilder.getDate());
+
+        String event = parser.next();
+        position.set(Position.KEY_ALARM, decodeAlarm(event));
+        position.set(Position.KEY_EVENT, event);
+        position.set(Position.KEY_BATTERY, Double.parseDouble(parser.next().replaceAll("\\.", "")) * 0.001);
+        position.set(Position.KEY_ODOMETER, parser.nextDouble());
+        position.set(Position.KEY_GPS, parser.nextInt());
+        position.set(Position.PREFIX_ADC + 1, parser.nextDouble() * 0.001);
+        position.set(Position.PREFIX_ADC + 2, parser.nextDouble() * 0.001);
+
+        Integer lac = parser.nextHexInt();
+        Integer cid = parser.nextHexInt();
+        Integer mcc = parser.nextInt();
+        Integer mnc = parser.nextInt();
+        if (lac != null && cid != null && mcc != null && mnc != null) {
+            position.setNetwork(new Network(CellTower.from(mcc, mnc, lac, cid)));
+        }
+
+        String checksum = parser.next();
+
+        if (channel != null) {
+            if (event.equals("3")) {
+                channel.writeAndFlush(new NetworkMessage("$AVCFG,00000000,d*31\r\n", remoteAddress));
+            } else if (event.equals("X") || event.equals("4")) {
+                channel.writeAndFlush(new NetworkMessage("$AVCFG,00000000,x*2D\r\n", remoteAddress));
+            } else if (event.equals("Z")) {
+                channel.writeAndFlush(new NetworkMessage("$AVCFG,00000000,z*2F\r\n", remoteAddress));
+            } else if (Character.isLowerCase(status.charAt(0))) {
+                String response = "$EAVACK," + event + "," + checksum;
+                response += Checksum.nmea(response) + "\r\n";
+                channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
+            }
+        }
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/M2cProtocol.java b/src/main/java/org/traccar/protocol/M2cProtocol.java
new file mode 100644
index 000000000..9de8526c3
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/M2cProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.CharacterDelimiterFrameDecoder;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class M2cProtocol extends BaseProtocol {
+
+    public M2cProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CharacterDelimiterFrameDecoder(32 * 1024, ']'));
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new M2cProtocolDecoder(M2cProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/M2cProtocolDecoder.java b/src/main/java/org/traccar/protocol/M2cProtocolDecoder.java
new file mode 100644
index 000000000..1460bb176
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/M2cProtocolDecoder.java
@@ -0,0 +1,131 @@
+/*
+ * Copyright 2017 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.regex.Pattern;
+
+public class M2cProtocolDecoder extends BaseProtocolDecoder {
+
+    public M2cProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("#M2C,")
+            .expression("[^,]+,")                // model
+            .expression("[^,]+,")                // firmware
+            .number("d+,")                       // protocol
+            .number("(d+),")                     // imei
+            .number("(d+),")                     // index
+            .expression("([LH]),")               // archive
+            .number("d+,")                       // priority
+            .number("(d+),")                     // event
+            .number("(dd)(dd)(dd),")             // date (yymmdd)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .number("(-?d+.d+),")                // latitude
+            .number("(-?d+.d+),")                // longitude
+            .number("(-?d+),")                   // altitude
+            .number("(d+),")                     // course
+            .number("(d+.d+),")                  // speed
+            .number("(d+),")                     // satellites
+            .number("(d+),")                     // odometer
+            .number("(d+),")                     // input
+            .number("(d+),")                     // output
+            .number("(d+),")                     // power
+            .number("(d+),")                     // battery
+            .number("(d+),")                     // adc 1
+            .number("(d+),")                     // adc 2
+            .number("(d+.?d*),")                 // temperature
+            .any()
+            .compile();
+
+    private Position decodePosition(Channel channel, SocketAddress remoteAddress, String line) {
+
+        Parser parser = new Parser(PATTERN, line);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.set(Position.KEY_INDEX, parser.nextInt());
+
+        if (parser.next().equals("H")) {
+            position.set(Position.KEY_ARCHIVE, true);
+        }
+
+        position.set(Position.KEY_EVENT, parser.nextInt());
+
+        position.setValid(true);
+        position.setTime(parser.nextDateTime());
+        position.setLatitude(parser.nextDouble());
+        position.setLongitude(parser.nextDouble());
+        position.setAltitude(parser.nextInt());
+        position.setCourse(parser.nextInt());
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble()));
+
+        position.set(Position.KEY_SATELLITES, parser.nextInt());
+        position.set(Position.KEY_ODOMETER, parser.nextLong());
+        position.set(Position.KEY_INPUT, parser.nextInt());
+        position.set(Position.KEY_OUTPUT, parser.nextInt());
+        position.set(Position.KEY_POWER, parser.nextInt() * 0.001);
+        position.set(Position.KEY_BATTERY, parser.nextInt() * 0.001);
+        position.set(Position.PREFIX_ADC + 1, parser.nextInt());
+        position.set(Position.PREFIX_ADC + 2, parser.nextInt());
+        position.set(Position.PREFIX_TEMP + 1, parser.nextDouble());
+
+        return position;
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        String sentence = (String) msg;
+        sentence = sentence.substring(1); // remove start symbol
+
+        List<Position> positions = new LinkedList<>();
+        for (String line : sentence.split("\r\n")) {
+            if (!line.isEmpty()) {
+                Position position = decodePosition(channel, remoteAddress, line);
+                if (position != null) {
+                    positions.add(position);
+                }
+            }
+        }
+
+        return positions;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/M2mProtocol.java b/src/main/java/org/traccar/protocol/M2mProtocol.java
new file mode 100644
index 000000000..dda328a59
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/M2mProtocol.java
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.FixedLengthFrameDecoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class M2mProtocol extends BaseProtocol {
+
+    public M2mProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new FixedLengthFrameDecoder(23));
+                pipeline.addLast(new M2mProtocolDecoder(M2mProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/M2mProtocolDecoder.java b/src/main/java/org/traccar/protocol/M2mProtocolDecoder.java
new file mode 100644
index 000000000..21e4a2fd0
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/M2mProtocolDecoder.java
@@ -0,0 +1,127 @@
+/*
+ * Copyright 2013 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.DateBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+
+public class M2mProtocolDecoder extends BaseProtocolDecoder {
+
+    public M2mProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private boolean firstPacket = true;
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        // Remove offset
+        for (int i = 0; i < buf.readableBytes(); i++) {
+            int b = buf.getByte(i);
+            if (b != 0x0b) {
+                buf.setByte(i, b - 0x20);
+            }
+        }
+
+        if (firstPacket) {
+
+            firstPacket = false;
+
+            StringBuilder imei = new StringBuilder();
+            for (int i = 0; i < 8; i++) {
+                int b = buf.readByte();
+                if (i != 0) {
+                    imei.append(b / 10);
+                }
+                imei.append(b % 10);
+            }
+
+            getDeviceSession(channel, remoteAddress, imei.toString());
+
+        } else {
+
+            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+            if (deviceSession == null) {
+                return null;
+            }
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            DateBuilder dateBuilder = new DateBuilder()
+                    .setDay(buf.readUnsignedByte() & 0x3f)
+                    .setMonth(buf.readUnsignedByte() & 0x3f)
+                    .setYear(buf.readUnsignedByte())
+                    .setHour(buf.readUnsignedByte() & 0x3f)
+                    .setMinute(buf.readUnsignedByte() & 0x7f)
+                    .setSecond(buf.readUnsignedByte() & 0x7f);
+            position.setTime(dateBuilder.getDate());
+
+            int degrees = buf.readUnsignedByte();
+            double latitude = buf.readUnsignedByte();
+            latitude += buf.readUnsignedByte() / 100.0;
+            latitude += buf.readUnsignedByte() / 10000.0;
+            latitude /= 60;
+            latitude += degrees;
+
+            int b = buf.readUnsignedByte();
+
+            degrees = (b & 0x7f) * 100 + buf.readUnsignedByte();
+            double longitude = buf.readUnsignedByte();
+            longitude += buf.readUnsignedByte() / 100.0;
+            longitude += buf.readUnsignedByte() / 10000.0;
+            longitude /= 60;
+            longitude += degrees;
+
+            if ((b & 0x80) != 0) {
+                longitude = -longitude;
+            }
+            if ((b & 0x40) != 0) {
+                latitude = -latitude;
+            }
+
+            position.setValid(true);
+            position.setLatitude(latitude);
+            position.setLongitude(longitude);
+            position.setSpeed(buf.readUnsignedByte());
+
+            int satellites = buf.readUnsignedByte();
+            if (satellites == 0) {
+                return null; // cell information
+            }
+            position.set(Position.KEY_SATELLITES, satellites);
+
+            // decode other data
+
+            return position;
+
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/MaestroProtocol.java b/src/main/java/org/traccar/protocol/MaestroProtocol.java
new file mode 100644
index 000000000..87453ce7d
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/MaestroProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.FixedLengthFrameDecoder;
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class MaestroProtocol extends BaseProtocol {
+
+    public MaestroProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new FixedLengthFrameDecoder(160));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new MaestroProtocolDecoder(MaestroProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/MaestroProtocolDecoder.java b/src/main/java/org/traccar/protocol/MaestroProtocolDecoder.java
new file mode 100644
index 000000000..37b097414
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/MaestroProtocolDecoder.java
@@ -0,0 +1,103 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class MaestroProtocolDecoder extends BaseProtocolDecoder {
+
+    public MaestroProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("@")
+            .number("(d+),")                     // imei
+            .number("d+,")                       // index
+            .expression("[^,]+,")                // profile
+            .expression("([01]),")               // validity
+            .number("(d+.d+),")                  // battery
+            .number("(d+),")                     // gsm
+            .expression("([01]),")               // starter
+            .expression("([01]),")               // ignition
+            .number("(dd)/(dd)/(dd),")           // date (yy/mm/dd)
+            .number("(dd):(dd):(dd),")           // time (hh:mm:ss)
+            .number("(-?d+.d+),")                // longitude
+            .number("(-?d+.d+),")                // latitude
+            .number("(d+.?d*),")                 // altitude
+            .number("(d+.?d*),")                 // speed
+            .number("(d+.?d*),")                 // course
+            .number("(d+),")                     // satellites
+            .number("(d+.?d*),")                 // hdop
+            .number("(d+.?d*)")                  // odometer
+            .number(",(d+)").optional()          // adc
+            .any()
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setValid(parser.nextInt(0) == 1);
+
+        position.set(Position.KEY_BATTERY, parser.nextDouble(0));
+        position.set(Position.KEY_RSSI, parser.nextInt(0));
+        position.set(Position.KEY_CHARGE, parser.nextInt(0) == 1);
+        position.set(Position.KEY_IGNITION, parser.nextInt(0) == 1);
+
+        position.setTime(parser.nextDateTime());
+
+        position.setLatitude(parser.nextDouble(0));
+        position.setLongitude(parser.nextDouble(0));
+        position.setAltitude(parser.nextDouble(0));
+        position.setSpeed(UnitsConverter.knotsFromMph(parser.nextDouble(0)));
+        position.setCourse(parser.nextDouble(0));
+
+        position.set(Position.KEY_SATELLITES, parser.nextInt(0));
+        position.set(Position.KEY_HDOP, parser.nextDouble(0));
+        position.set(Position.KEY_ODOMETER, parser.nextDouble(0) * 1609.34);
+
+        if (parser.hasNext()) {
+            position.set(Position.PREFIX_ADC + 1, parser.nextInt(0));
+        }
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/ManPowerProtocol.java b/src/main/java/org/traccar/protocol/ManPowerProtocol.java
new file mode 100644
index 000000000..49d8b1e9f
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/ManPowerProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.CharacterDelimiterFrameDecoder;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class ManPowerProtocol extends BaseProtocol {
+
+    public ManPowerProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, ';'));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new ManPowerProtocolDecoder(ManPowerProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/ManPowerProtocolDecoder.java b/src/main/java/org/traccar/protocol/ManPowerProtocolDecoder.java
new file mode 100644
index 000000000..2c7b7eb40
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/ManPowerProtocolDecoder.java
@@ -0,0 +1,81 @@
+/*
+ * Copyright 2013 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class ManPowerProtocolDecoder extends BaseProtocolDecoder {
+
+    public ManPowerProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("simei:")
+            .number("(d+),")                     // imei
+            .expression("[^,]*,[^,]*,")
+            .expression("([^,]*),")              // status
+            .number("d+,d+,d+.?d*,")
+            .number("(dd)(dd)(dd)")              // date (yymmdd)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .expression("([AV]),")               // validity
+            .number("(dd)(dd.dddd),")            // latitude
+            .expression("([NS]),")
+            .number("(ddd)(dd.dddd),")           // longitude
+            .expression("([EW])?,")
+            .number("(d+.?d*),")                 // speed
+            .any()
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.set(Position.KEY_STATUS, parser.next());
+
+        position.setTime(parser.nextDateTime());
+
+        position.setValid(parser.next().equals("A"));
+        position.setLatitude(parser.nextCoordinate());
+        position.setLongitude(parser.nextCoordinate());
+        position.setSpeed(parser.nextDouble(0));
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/MegastekFrameDecoder.java b/src/main/java/org/traccar/protocol/MegastekFrameDecoder.java
new file mode 100644
index 000000000..347fa24b1
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/MegastekFrameDecoder.java
@@ -0,0 +1,59 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+import org.traccar.BaseFrameDecoder;
+import org.traccar.helper.BufferUtil;
+
+import java.nio.charset.StandardCharsets;
+
+public class MegastekFrameDecoder extends BaseFrameDecoder {
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+        if (buf.readableBytes() < 10) {
+            return null;
+        }
+
+        if (Character.isDigit(buf.getByte(buf.readerIndex()))) {
+            int length = 4 + Integer.parseInt(buf.toString(buf.readerIndex(), 4, StandardCharsets.US_ASCII));
+            if (buf.readableBytes() >= length) {
+                return buf.readRetainedSlice(length);
+            }
+        } else {
+            while (buf.getByte(buf.readerIndex()) == '\r' || buf.getByte(buf.readerIndex()) == '\n') {
+                buf.skipBytes(1);
+            }
+            int delimiter = BufferUtil.indexOf("\r\n", buf);
+            if (delimiter == -1) {
+                delimiter = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '!');
+            }
+            if (delimiter != -1) {
+                ByteBuf result = buf.readRetainedSlice(delimiter - buf.readerIndex());
+                buf.skipBytes(1);
+                return result;
+            }
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/MegastekProtocol.java b/src/main/java/org/traccar/protocol/MegastekProtocol.java
new file mode 100644
index 000000000..e9f5f9fde
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/MegastekProtocol.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class MegastekProtocol extends BaseProtocol {
+
+    public MegastekProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new MegastekFrameDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new MegastekProtocolDecoder(MegastekProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/MegastekProtocolDecoder.java b/src/main/java/org/traccar/protocol/MegastekProtocolDecoder.java
new file mode 100644
index 000000000..d81cc0eda
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/MegastekProtocolDecoder.java
@@ -0,0 +1,419 @@
+/*
+ * Copyright 2013 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.CellTower;
+import org.traccar.model.Network;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class MegastekProtocolDecoder extends BaseProtocolDecoder {
+
+    public MegastekProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN_GPRMC = new PatternBuilder()
+            .text("$GPRMC,")
+            .number("(dd)(dd)(dd).(ddd),")       // time (hhmmss.sss)
+            .expression("([AV]),")               // validity
+            .number("(d+)(dd.d+),([NS]),")       // latitude
+            .number("(d+)(dd.d+),([EW]),")       // longitude
+            .number("(d+.d+)?,")                 // speed
+            .number("(d+.d+)?,")                 // course
+            .number("(dd)(dd)(dd)")              // date (ddmmyy)
+            .any()                               // checksum
+            .compile();
+
+    private static final Pattern PATTERN_SIMPLE = new PatternBuilder()
+            .expression("[FL],")                 // flag
+            .expression("([^,]*),")              // alarm
+            .number("imei:(d+),")                // imei
+            .number("(d+/?d*)?,")                // satellites
+            .number("(d+.d+)?,")                 // altitude
+            .number("Battery=(d+)%,,?")          // battery
+            .number("(d)?,")                     // charger
+            .number("(d+)?,")                    // mcc
+            .number("(d+)?,")                    // mnc
+            .number("(xxxx),")                   // lac
+            .number("(xxxx);")                   // cid
+            .any()                               // checksum
+            .compile();
+
+    private static final Pattern PATTERN_ALTERNATIVE = new PatternBuilder()
+            .number("(d+),")                     // mcc
+            .number("(d+),")                     // mnc
+            .number("(xxxx),")                   // lac
+            .number("(xxxx),")                   // cid
+            .number("(d+),")                     // gsm signal
+            .number("(d+),")                     // battery
+            .number("(d+),")                     // flags
+            .number("(d+),")                     // inputs
+            .number("(?:(d+),)?")                // outputs
+            .number("(d.?d*),")                  // adc 1
+            .groupBegin()
+            .number("(d.dd),")                   // adc 2
+            .number("(d.dd),")                   // adc 3
+            .groupEnd("?")
+            .expression("([^;]+);")              // alarm
+            .any()                               // checksum
+            .compile();
+
+    private boolean parseLocation(String location, Position position) {
+
+        Parser parser = new Parser(PATTERN_GPRMC, location);
+        if (!parser.matches()) {
+            return false;
+        }
+
+        DateBuilder dateBuilder = new DateBuilder()
+                .setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+
+        position.setValid(parser.next().equals("A"));
+        position.setLatitude(parser.nextCoordinate());
+        position.setLongitude(parser.nextCoordinate());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
+
+        dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+        position.setTime(dateBuilder.getDate());
+
+        return true;
+    }
+
+    private Position decodeOld(Channel channel, SocketAddress remoteAddress, String sentence) {
+
+        // Detect type
+        boolean simple = sentence.charAt(3) == ',' || sentence.charAt(6) == ',';
+
+        // Split message
+        String id;
+        String location;
+        String status;
+        if (simple) {
+
+            int beginIndex = sentence.indexOf(',') + 1;
+            int endIndex = sentence.indexOf(',', beginIndex);
+            id = sentence.substring(beginIndex, endIndex);
+
+            beginIndex = endIndex + 1;
+            endIndex = sentence.indexOf('*', beginIndex);
+            if (endIndex != -1) {
+                endIndex += 3;
+            } else {
+                endIndex = sentence.length();
+            }
+            location = sentence.substring(beginIndex, endIndex);
+
+            beginIndex = endIndex + 1;
+            if (beginIndex > sentence.length()) {
+                beginIndex = endIndex;
+            }
+            status = sentence.substring(beginIndex);
+
+        } else {
+
+            int beginIndex = 3;
+            int endIndex = beginIndex + 16;
+            id = sentence.substring(beginIndex, endIndex).trim();
+
+            beginIndex = endIndex + 2;
+            endIndex = sentence.indexOf('*', beginIndex) + 3;
+            location = sentence.substring(beginIndex, endIndex);
+
+            beginIndex = endIndex + 1;
+            status = sentence.substring(beginIndex);
+
+        }
+
+        Position position = new Position(getProtocolName());
+        if (!parseLocation(location, position)) {
+            return null;
+        }
+
+        if (simple) {
+
+            Parser parser = new Parser(PATTERN_SIMPLE, status);
+            if (parser.matches()) {
+
+                position.set(Position.KEY_ALARM, decodeAlarm(parser.next()));
+
+                DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next(), id);
+                if (deviceSession == null) {
+                    return null;
+                }
+                position.setDeviceId(deviceSession.getDeviceId());
+
+                String sat = parser.next();
+                if (sat.contains("/")) {
+                    position.set(Position.KEY_SATELLITES, Integer.parseInt(sat.split("/")[0]));
+                    position.set(Position.KEY_SATELLITES_VISIBLE, Integer.parseInt(sat.split("/")[1]));
+                } else {
+                    position.set(Position.KEY_SATELLITES, Integer.parseInt(sat));
+                }
+
+                position.setAltitude(parser.nextDouble(0));
+
+                position.set(Position.KEY_BATTERY_LEVEL, parser.nextDouble(0));
+
+                String charger = parser.next();
+                if (charger != null) {
+                    position.set(Position.KEY_CHARGE, Integer.parseInt(charger) == 1);
+                }
+
+                if (parser.hasNext(4)) {
+                    position.setNetwork(new Network(CellTower.from(
+                            parser.nextInt(0), parser.nextInt(0), parser.nextHexInt(0), parser.nextHexInt(0))));
+                }
+
+            } else {
+
+                DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, id);
+                if (deviceSession == null) {
+                    return null;
+                }
+                position.setDeviceId(deviceSession.getDeviceId());
+
+            }
+
+        } else {
+
+            Parser parser = new Parser(PATTERN_ALTERNATIVE, status);
+            if (parser.matches()) {
+
+                DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, id);
+                if (deviceSession == null) {
+                    return null;
+                }
+                position.setDeviceId(deviceSession.getDeviceId());
+
+                position.setNetwork(new Network(CellTower.from(parser.nextInt(0), parser.nextInt(0),
+                        parser.nextHexInt(0), parser.nextHexInt(0), parser.nextInt(0))));
+
+                position.set(Position.KEY_BATTERY_LEVEL, parser.nextDouble());
+
+                position.set(Position.KEY_FLAGS, parser.next());
+                position.set(Position.KEY_INPUT, parser.next());
+                position.set(Position.KEY_OUTPUT, parser.next());
+                position.set(Position.PREFIX_ADC + 1, parser.next());
+                position.set(Position.PREFIX_ADC + 2, parser.next());
+                position.set(Position.PREFIX_ADC + 3, parser.next());
+                position.set(Position.KEY_ALARM, decodeAlarm(parser.next()));
+
+            }
+        }
+
+        return position;
+    }
+
+    private static final Pattern PATTERN_NEW = new PatternBuilder()
+            .number("dddd").optional()
+            .text("$MGV")
+            .number("ddd,")
+            .number("(d+),")                     // imei
+            .expression("[^,]*,")                // name
+            .expression("([RS]),")
+            .number("(dd)(dd)(dd),")             // date (ddmmyy)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .expression("([AV]),")               // validity
+            .number("(d+)(dd.d+),([NS]),")       // latitude
+            .number("(d+)(dd.d+),([EW]),")       // longitude
+            .number("dd,")
+            .number("(dd),")                     // satellites
+            .number("dd,")
+            .number("(d+.d+),")                  // hdop
+            .number("(d+.d+)?,")                 // speed
+            .number("(d+.d+)?,")                 // course
+            .number("(-?d+.d+),")                // altitude
+            .number("(d+.d+)?,")                 // odometer
+            .number("(d+),")                     // mcc
+            .number("(d+),")                     // mnc
+            .number("(xxxx)?,")                  // lac
+            .number("(x+)?,")                    // cid
+            .number("(d+)?,")                    // gsm
+            .groupBegin()
+            .number("([01]{4})?,")               // input
+            .number("([01]{4})?,")               // output
+            .number("(d+)?,")                    // adc1
+            .number("(d+)?,")                    // adc2
+            .number("(d+)?,")                    // adc3
+            .or()
+            .number("(d+),")                     // input
+            .number("(d+),")                     // output
+            .number("(d+),")                     // adc1
+            .number("(d+),")                     // adc2
+            .number("(d+),")                     // adc3
+            .groupEnd()
+            .groupBegin()
+            .number("(-?d+.?d*)")                // temperature 1
+            .or().text(" ")
+            .groupEnd("?").text(",")
+            .groupBegin()
+            .number("(-?d+.?d*)")                // temperature 2
+            .or().text(" ")
+            .groupEnd("?").text(",")
+            .number("(d+)?,")                    // rfid
+            .expression("[^,]*,")
+            .number("(d+)?,")                    // battery
+            .expression("([^,]*)")               // alert
+            .any()
+            .compile();
+
+    private Position decodeNew(Channel channel, SocketAddress remoteAddress, String sentence) {
+
+        Parser parser = new Parser(PATTERN_NEW, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        if (parser.next().equals("S")) {
+            position.set(Position.KEY_ARCHIVE, true);
+        }
+
+        position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
+
+        position.setValid(parser.next().equals("A"));
+        position.setLatitude(parser.nextCoordinate());
+        position.setLongitude(parser.nextCoordinate());
+
+        position.set(Position.KEY_SATELLITES, parser.nextInt(0));
+        position.set(Position.KEY_HDOP, parser.nextDouble(0));
+
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
+        position.setAltitude(parser.nextDouble(0));
+
+        if (parser.hasNext()) {
+            position.set(Position.KEY_ODOMETER, parser.nextDouble(0) * 1000);
+        }
+
+        int mcc = parser.nextInt();
+        int mnc = parser.nextInt();
+        Integer lac = parser.nextHexInt();
+        Integer cid = parser.nextHexInt();
+        Integer rssi = parser.nextInt();
+        if (lac != null && cid != null) {
+            CellTower tower = CellTower.from(mcc, mnc, lac, cid);
+            if (rssi != null) {
+                tower.setSignalStrength(rssi);
+            }
+            position.setNetwork(new Network(tower));
+        }
+
+        if (parser.hasNext(5)) {
+            position.set(Position.KEY_INPUT, parser.nextBinInt(0));
+            position.set(Position.KEY_OUTPUT, parser.nextBinInt(0));
+            for (int i = 1; i <= 3; i++) {
+                position.set(Position.PREFIX_ADC + i, parser.nextInt(0));
+            }
+        }
+
+        if (parser.hasNext(5)) {
+            position.set(Position.KEY_HEART_RATE, parser.nextInt());
+            position.set(Position.KEY_STEPS, parser.nextInt());
+            position.set("activityTime", parser.nextInt());
+            position.set("lightSleepTime", parser.nextInt());
+            position.set("deepSleepTime", parser.nextInt());
+        }
+
+        for (int i = 1; i <= 2; i++) {
+            String adc = parser.next();
+            if (adc != null) {
+                position.set(Position.PREFIX_TEMP + i, Double.parseDouble(adc));
+            }
+        }
+
+        position.set(Position.KEY_DRIVER_UNIQUE_ID, parser.next());
+
+        String battery = parser.next();
+        if (battery != null) {
+            position.set(Position.KEY_BATTERY, Integer.parseInt(battery));
+        }
+
+        position.set(Position.KEY_ALARM, decodeAlarm(parser.next()));
+
+        return position;
+    }
+
+    private String decodeAlarm(String value) {
+        value = value.toLowerCase();
+        if (value.startsWith("geo")) {
+            if (value.endsWith("in")) {
+                return Position.ALARM_GEOFENCE_ENTER;
+            } else if (value.endsWith("out")) {
+                return Position.ALARM_GEOFENCE_EXIT;
+            }
+        }
+        switch (value) {
+            case "poweron":
+                return Position.ALARM_POWER_ON;
+            case "poweroff":
+                return Position.ALARM_POWER_ON;
+            case "sos":
+            case "help":
+                return Position.ALARM_SOS;
+            case "over speed":
+            case "overspeed":
+                return Position.ALARM_OVERSPEED;
+            case "lowspeed":
+                return Position.ALARM_LOW_SPEED;
+            case "low battery":
+            case "lowbattery":
+                return Position.ALARM_LOW_BATTERY;
+            case "vib":
+                return Position.ALARM_VIBRATION;
+            case "move in":
+                return Position.ALARM_GEOFENCE_ENTER;
+            case "move out":
+                return Position.ALARM_GEOFENCE_EXIT;
+            case "error":
+                return Position.ALARM_FAULT;
+            default:
+                return null;
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        String sentence = (String) msg;
+
+        if (sentence.contains("$MG")) {
+            return decodeNew(channel, remoteAddress, sentence);
+        } else {
+            return decodeOld(channel, remoteAddress, sentence);
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/MeiligaoFrameDecoder.java b/src/main/java/org/traccar/protocol/MeiligaoFrameDecoder.java
new file mode 100644
index 000000000..52f9ae26d
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/MeiligaoFrameDecoder.java
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2013 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+import org.traccar.BaseFrameDecoder;
+
+public class MeiligaoFrameDecoder extends BaseFrameDecoder {
+
+    private static final int MESSAGE_HEADER = 4;
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+        // Strip not '$' (0x24) bytes from the beginning
+        while (buf.isReadable() && buf.getUnsignedByte(buf.readerIndex()) != 0x24) {
+            buf.readByte();
+        }
+
+        // Check length and return buffer
+        if (buf.readableBytes() >= MESSAGE_HEADER) {
+            int length = buf.getUnsignedShort(buf.readerIndex() + 2);
+            if (buf.readableBytes() >= length) {
+                return buf.readRetainedSlice(length);
+            }
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/MeiligaoProtocol.java b/src/main/java/org/traccar/protocol/MeiligaoProtocol.java
new file mode 100644
index 000000000..c307c7318
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/MeiligaoProtocol.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+import org.traccar.model.Command;
+
+public class MeiligaoProtocol extends BaseProtocol {
+
+    public MeiligaoProtocol() {
+        setSupportedDataCommands(
+                Command.TYPE_POSITION_SINGLE,
+                Command.TYPE_POSITION_PERIODIC,
+                Command.TYPE_ENGINE_STOP,
+                Command.TYPE_ENGINE_RESUME,
+                Command.TYPE_ALARM_GEOFENCE,
+                Command.TYPE_SET_TIMEZONE,
+                Command.TYPE_REQUEST_PHOTO,
+                Command.TYPE_REBOOT_DEVICE);
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new MeiligaoFrameDecoder());
+                pipeline.addLast(new MeiligaoProtocolEncoder());
+                pipeline.addLast(new MeiligaoProtocolDecoder(MeiligaoProtocol.this));
+            }
+        });
+        addServer(new TrackerServer(true, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new MeiligaoProtocolEncoder());
+                pipeline.addLast(new MeiligaoProtocolDecoder(MeiligaoProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/MeiligaoProtocolDecoder.java b/src/main/java/org/traccar/protocol/MeiligaoProtocolDecoder.java
new file mode 100644
index 000000000..cbfc3660a
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/MeiligaoProtocolDecoder.java
@@ -0,0 +1,499 @@
+/*
+ * Copyright 2012 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.Context;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.Checksum;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.HashMap;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
+import java.util.regex.Pattern;
+
+public class MeiligaoProtocolDecoder extends BaseProtocolDecoder {
+
+    private Map<Byte, ByteBuf> photos = new HashMap<>();
+
+    public MeiligaoProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .number("(dd)(dd)(dd).?d*,")         // time (hhmmss)
+            .expression("([AV]),")               // validity
+            .number("(d+)(dd.d+),")              // latitude
+            .expression("([NS]),")
+            .number("(d+)(dd.d+),")              // longitude
+            .expression("([EW]),")
+            .number("(d+.?d*)?,")                // speed
+            .number("(d+.?d*)?,")                // course
+            .number("(dd)(dd)(dd)")              // date (ddmmyy)
+            .expression("[^\\|]*")
+            .groupBegin()
+            .number("|(d+.d+)?")                 // hdop
+            .number("|(-?d+.?d*)?")              // altitude
+            .number("|(xxxx)?")                  // state
+            .groupBegin()
+            .number("|(xxxx),(xxxx)")            // adc
+            .number(",(xxxx)").optional()
+            .number(",(xxxx)").optional()
+            .number(",(xxxx)").optional()
+            .number(",(xxxx)").optional()
+            .number(",(xxxx)").optional()
+            .number(",(xxxx)").optional()
+            .groupBegin()
+            .number("|x{16,20}")                 // cell
+            .number("|(xx)")                     // rssi
+            .number("|(x{8})")                   // odometer
+            .groupBegin()
+            .number("|(xx)")                     // satellites
+            .text("|")
+            .expression("(.*)")                  // driver
+            .groupEnd("?")
+            .or()
+            .number("|(d{1,9})")                 // odometer
+            .groupBegin()
+            .number("|(x{5,})")                  // rfid
+            .groupEnd("?")
+            .groupEnd("?")
+            .groupEnd("?")
+            .groupEnd("?")
+            .any()
+            .compile();
+
+    private static final Pattern PATTERN_RFID = new PatternBuilder()
+            .number("|(dd)(dd)(dd),")            // time (hhmmss)
+            .number("(dd)(dd)(dd),")             // date (ddmmyy)
+            .number("(d+)(dd.d+),")              // latitude
+            .expression("([NS]),")
+            .number("(d+)(dd.d+),")              // longitude
+            .expression("([EW])")
+            .compile();
+
+    private static final Pattern PATTERN_OBD = new PatternBuilder()
+            .number("(d+.d+),")                  // battery
+            .number("(d+),")                     // rpm
+            .number("(d+),")                     // speed
+            .number("(d+.d+),")                  // throttle
+            .number("(d+.d+),")                  // engine load
+            .number("(-?d+),")                   // coolant temp
+            .number("(d+.d+),")                  // instantaneous fuel
+            .number("(d+.d+),")                  // average fuel
+            .number("(d+.d+),")                  // driving range
+            .number("(d+.?d*),")                 // odometer
+            .number("(d+.d+),")                  // single fuel consumption
+            .number("(d+.d+),")                  // total fuel consumption
+            .number("(d+),")                     // error code count
+            .number("(d+),")                     // hard acceleration count
+            .number("(d+)")                      // hard brake count
+            .compile();
+
+    private static final Pattern PATTERN_OBDA = new PatternBuilder()
+            .number("(d+),")                     // total ignition
+            .number("(d+.d+),")                  // total driving time
+            .number("(d+.d+),")                  // total idling time
+            .number("(d+),")                     // average hot start time
+            .number("(d+),")                     // average speed
+            .number("(d+),")                     // history highest speed
+            .number("(d+),")                     // history highest rpm
+            .number("(d+),")                     // total hard acceleration
+            .number("(d+)")                      // total hard brake
+            .compile();
+
+    public static final int MSG_HEARTBEAT = 0x0001;
+    public static final int MSG_SERVER = 0x0002;
+    public static final int MSG_LOGIN = 0x5000;
+    public static final int MSG_LOGIN_RESPONSE = 0x4000;
+    public static final int MSG_POSITION = 0x9955;
+    public static final int MSG_POSITION_LOGGED = 0x9016;
+    public static final int MSG_ALARM = 0x9999;
+    public static final int MSG_RFID = 0x9966;
+    public static final int MSG_RETRANSMISSION = 0x6688;
+
+    public static final int MSG_OBD_RT = 0x9901;
+    public static final int MSG_OBD_RTA = 0x9902;
+
+    public static final int MSG_TRACK_ON_DEMAND = 0x4101;
+    public static final int MSG_TRACK_BY_INTERVAL = 0x4102;
+    public static final int MSG_MOVEMENT_ALARM = 0x4106;
+    public static final int MSG_OUTPUT_CONTROL = 0x4115;
+    public static final int MSG_TIME_ZONE = 0x4132;
+    public static final int MSG_TAKE_PHOTO = 0x4151;
+    public static final int MSG_UPLOAD_PHOTO = 0x0800;
+    public static final int MSG_UPLOAD_PHOTO_RESPONSE = 0x8801;
+    public static final int MSG_DATA_PHOTO = 0x9988;
+    public static final int MSG_POSITION_IMAGE = 0x9977;
+    public static final int MSG_UPLOAD_COMPLETE = 0x0f80;
+    public static final int MSG_REBOOT_GPS = 0x4902;
+
+    private DeviceSession identify(ByteBuf buf, Channel channel, SocketAddress remoteAddress) {
+        StringBuilder builder = new StringBuilder();
+
+        for (int i = 0; i < 7; i++) {
+            int b = buf.readUnsignedByte();
+
+            // First digit
+            int d1 = (b & 0xf0) >> 4;
+            if (d1 == 0xf) {
+                break;
+            }
+            builder.append(d1);
+
+            // Second digit
+            int d2 = b & 0x0f;
+            if (d2 == 0xf) {
+                break;
+            }
+            builder.append(d2);
+        }
+
+        String id = builder.toString();
+
+        if (id.length() == 14) {
+            return getDeviceSession(channel, remoteAddress, id, id + Checksum.luhn(Long.parseLong(id)));
+        } else {
+            return getDeviceSession(channel, remoteAddress, id);
+        }
+    }
+
+    private static void sendResponse(
+            Channel channel, SocketAddress remoteAddress, ByteBuf id, int type, ByteBuf msg) {
+
+        if (channel != null) {
+            ByteBuf buf = Unpooled.buffer(
+                    2 + 2 + id.readableBytes() + 2 + msg.readableBytes() + 2 + 2);
+
+            buf.writeByte('@');
+            buf.writeByte('@');
+            buf.writeShort(buf.capacity());
+            buf.writeBytes(id);
+            buf.writeShort(type);
+            buf.writeBytes(msg);
+            msg.release();
+            buf.writeShort(Checksum.crc16(Checksum.CRC16_CCITT_FALSE, buf.nioBuffer()));
+            buf.writeByte('\r');
+            buf.writeByte('\n');
+
+            channel.writeAndFlush(new NetworkMessage(buf, remoteAddress));
+        }
+    }
+
+    private String decodeAlarm(short value) {
+        switch (value) {
+            case 0x01:
+                return Position.ALARM_SOS;
+            case 0x10:
+                return Position.ALARM_LOW_BATTERY;
+            case 0x11:
+                return Position.ALARM_OVERSPEED;
+            case 0x12:
+                return Position.ALARM_MOVEMENT;
+            case 0x13:
+                return Position.ALARM_GEOFENCE_ENTER;
+            case 0x14:
+                return Position.ALARM_ACCIDENT;
+            case 0x50:
+                return Position.ALARM_POWER_OFF;
+            case 0x53:
+                return Position.ALARM_GPS_ANTENNA_CUT;
+            case 0x72:
+                return Position.ALARM_BRAKING;
+            case 0x73:
+                return Position.ALARM_ACCELERATION;
+            default:
+                return null;
+        }
+    }
+
+    private Position decodeRegular(Position position, String sentence) {
+        Parser parser = new Parser(PATTERN, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DateBuilder dateBuilder = new DateBuilder()
+                .setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+
+        position.setValid(parser.next().equals("A"));
+        position.setLatitude(parser.nextCoordinate());
+        position.setLongitude(parser.nextCoordinate());
+
+        if (parser.hasNext()) {
+            position.setSpeed(parser.nextDouble(0));
+        }
+
+        if (parser.hasNext()) {
+            position.setCourse(parser.nextDouble(0));
+        }
+
+        dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+        position.setTime(dateBuilder.getDate());
+
+        position.set(Position.KEY_HDOP, parser.nextDouble());
+
+        if (parser.hasNext()) {
+            position.setAltitude(parser.nextDouble(0));
+        }
+
+        if (parser.hasNext()) {
+            int status = parser.nextHexInt();
+            for (int i = 1; i <= 5; i++) {
+                position.set(Position.PREFIX_OUT + i, BitUtil.check(status, i - 1));
+            }
+            for (int i = 1; i <= 5; i++) {
+                position.set(Position.PREFIX_IN + i, BitUtil.check(status, i - 1 + 8));
+            }
+        }
+
+        for (int i = 1; i <= 8; i++) {
+            position.set(Position.PREFIX_ADC + i, parser.nextHexInt());
+        }
+
+        position.set(Position.KEY_RSSI, parser.nextHexInt());
+        position.set(Position.KEY_ODOMETER, parser.nextHexLong());
+        position.set(Position.KEY_SATELLITES, parser.nextHexInt());
+        position.set("driverLicense", parser.next());
+        position.set(Position.KEY_ODOMETER, parser.nextLong());
+        position.set(Position.KEY_DRIVER_UNIQUE_ID, parser.next());
+
+        return position;
+    }
+
+    private Position decodeRfid(Position position, String sentence) {
+        Parser parser = new Parser(PATTERN_RFID, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        position.setTime(parser.nextDateTime(Parser.DateTimeFormat.HMS_DMY));
+
+        position.setValid(true);
+        position.setLatitude(parser.nextCoordinate());
+        position.setLongitude(parser.nextCoordinate());
+
+        return position;
+    }
+
+    private Position decodeObd(Position position, String sentence) {
+        Parser parser = new Parser(PATTERN_OBD, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        getLastLocation(position, null);
+
+        position.set(Position.KEY_BATTERY, parser.nextDouble());
+        position.set(Position.KEY_RPM, parser.nextInt());
+        position.set(Position.KEY_OBD_SPEED, parser.nextInt());
+        position.set(Position.KEY_THROTTLE, parser.nextDouble());
+        position.set(Position.KEY_ENGINE_LOAD, parser.nextDouble());
+        position.set(Position.KEY_COOLANT_TEMP, parser.nextInt());
+        position.set(Position.KEY_FUEL_CONSUMPTION, parser.nextDouble());
+        position.set("averageFuelConsumption", parser.nextDouble());
+        position.set("drivingRange", parser.nextDouble());
+        position.set(Position.KEY_ODOMETER, parser.nextDouble());
+        position.set("singleFuelConsumption", parser.nextDouble());
+        position.set(Position.KEY_FUEL_USED, parser.nextDouble());
+        position.set(Position.KEY_DTCS, parser.nextInt());
+        position.set("hardAccelerationCount", parser.nextInt());
+        position.set("hardBrakingCount", parser.nextInt());
+
+        return position;
+    }
+
+    private Position decodeObdA(Position position, String sentence) {
+        Parser parser = new Parser(PATTERN_OBDA, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        getLastLocation(position, null);
+
+        position.set("totalIgnitionNo", parser.nextInt(0));
+        position.set("totalDrivingTime", parser.nextDouble(0));
+        position.set("totalIdlingTime", parser.nextDouble(0));
+        position.set("averageHotStartTime", parser.nextInt(0));
+        position.set("averageSpeed", parser.nextInt(0));
+        position.set("historyHighestSpeed", parser.nextInt(0));
+        position.set("historyHighestRpm", parser.nextInt(0));
+        position.set("totalHarshAccerleration", parser.nextInt(0));
+        position.set("totalHarshBrake", parser.nextInt(0));
+
+        return position;
+    }
+
+    private List<Position> decodeRetransmission(ByteBuf buf, DeviceSession deviceSession) {
+        List<Position> positions = new LinkedList<>();
+
+        int count = buf.readUnsignedByte();
+        for (int i = 0; i < count; i++) {
+
+            buf.readUnsignedByte(); // alarm
+
+            int endIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '\\');
+            if (endIndex < 0) {
+                endIndex = buf.writerIndex() - 4;
+            }
+
+            String sentence = buf.readSlice(endIndex - buf.readerIndex()).toString(StandardCharsets.US_ASCII);
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            position = decodeRegular(position, sentence);
+
+            if (position != null) {
+                positions.add(position);
+            }
+
+            if (buf.readableBytes() > 4) {
+                buf.readUnsignedByte(); // delimiter
+            }
+
+        }
+
+        return positions;
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+        buf.skipBytes(2); // header
+        buf.readShort(); // length
+        ByteBuf id = buf.readSlice(7);
+        int command = buf.readUnsignedShort();
+
+        if (command == MSG_LOGIN) {
+            ByteBuf response = Unpooled.wrappedBuffer(new byte[]{0x01});
+            sendResponse(channel, remoteAddress, id, MSG_LOGIN_RESPONSE, response);
+            return null;
+        } else if (command == MSG_HEARTBEAT) {
+            ByteBuf response = Unpooled.wrappedBuffer(new byte[]{0x01});
+            sendResponse(channel, remoteAddress, id, MSG_HEARTBEAT, response);
+            return null;
+        } else if (command == MSG_SERVER) {
+            ByteBuf response = Unpooled.copiedBuffer(getServer(channel, ':'), StandardCharsets.US_ASCII);
+            sendResponse(channel, remoteAddress, id, MSG_SERVER, response);
+            return null;
+        } else if (command == MSG_UPLOAD_PHOTO) {
+            byte imageIndex = buf.readByte();
+            photos.put(imageIndex, Unpooled.buffer());
+            ByteBuf response = Unpooled.copiedBuffer(new byte[]{imageIndex});
+            sendResponse(channel, remoteAddress, id, MSG_UPLOAD_PHOTO_RESPONSE, response);
+            return null;
+        } else if (command == MSG_UPLOAD_COMPLETE) {
+            byte imageIndex = buf.readByte();
+            ByteBuf response = Unpooled.copiedBuffer(new byte[]{imageIndex, 0, 0});
+            sendResponse(channel, remoteAddress, id, MSG_RETRANSMISSION, response);
+            return null;
+        }
+
+        DeviceSession deviceSession = identify(id, channel, remoteAddress);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        if (command == MSG_DATA_PHOTO) {
+
+            byte imageIndex = buf.readByte();
+            buf.readUnsignedShort(); // image footage
+            buf.readUnsignedByte(); // total packets
+            buf.readUnsignedByte(); // packet index
+
+            photos.get(imageIndex).writeBytes(buf, buf.readableBytes() - 2 - 2);
+
+            return null;
+
+        } else if (command == MSG_RETRANSMISSION) {
+
+            return decodeRetransmission(buf, deviceSession);
+
+        } else {
+
+            Position position = new Position(getProtocolName());
+
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            if (command == MSG_ALARM) {
+                short alarmCode = buf.readUnsignedByte();
+                position.set(Position.KEY_ALARM, decodeAlarm(alarmCode));
+                if (alarmCode >= 0x02 && alarmCode <= 0x05) {
+                    position.set(Position.PREFIX_IN + alarmCode, 1);
+                } else if (alarmCode >= 0x32 && alarmCode <= 0x35) {
+                    position.set(Position.PREFIX_IN + (alarmCode - 0x30), 0);
+                }
+            } else if (command == MSG_POSITION_LOGGED) {
+                buf.skipBytes(6);
+            } else if (command == MSG_RFID) {
+                for (int i = 0; i < 15; i++) {
+                    long rfid = buf.readUnsignedInt();
+                    if (rfid != 0) {
+                        String card = String.format("%010d", rfid);
+                        position.set("card" + (i + 1), card);
+                        position.set(Position.KEY_DRIVER_UNIQUE_ID, card);
+                    }
+                }
+            } else if (command == MSG_POSITION_IMAGE) {
+                byte imageIndex = buf.readByte();
+                buf.readUnsignedByte(); // image upload type
+                String uniqueId = Context.getIdentityManager().getById(deviceSession.getDeviceId()).getUniqueId();
+                ByteBuf photo = photos.remove(imageIndex);
+                try {
+                    position.set(Position.KEY_IMAGE, Context.getMediaManager().writeFile(uniqueId, photo, "jpg"));
+                } finally {
+                    photo.release();
+                }
+            }
+
+            String sentence = buf.toString(buf.readerIndex(), buf.readableBytes() - 4, StandardCharsets.US_ASCII);
+
+            switch (command) {
+                case MSG_POSITION:
+                case MSG_POSITION_LOGGED:
+                case MSG_ALARM:
+                case MSG_POSITION_IMAGE:
+                    return decodeRegular(position, sentence);
+                case MSG_RFID:
+                    return decodeRfid(position, sentence);
+                case MSG_OBD_RT:
+                    return decodeObd(position, sentence);
+                case MSG_OBD_RTA:
+                    return decodeObdA(position, sentence);
+                default:
+                    return null;
+            }
+
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/MeiligaoProtocolEncoder.java b/src/main/java/org/traccar/protocol/MeiligaoProtocolEncoder.java
new file mode 100644
index 000000000..57cbbe0fc
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/MeiligaoProtocolEncoder.java
@@ -0,0 +1,86 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import org.traccar.BaseProtocolEncoder;
+import org.traccar.helper.Checksum;
+import org.traccar.helper.DataConverter;
+import org.traccar.model.Command;
+
+import java.nio.charset.StandardCharsets;
+import java.util.TimeZone;
+
+public class MeiligaoProtocolEncoder extends BaseProtocolEncoder {
+
+    private ByteBuf encodeContent(long deviceId, int type, ByteBuf content) {
+
+        ByteBuf buf = Unpooled.buffer();
+
+        buf.writeByte('@');
+        buf.writeByte('@');
+
+        buf.writeShort(2 + 2 + 7 + 2 + content.readableBytes() + 2 + 2); // message length
+
+        buf.writeBytes(DataConverter.parseHex((getUniqueId(deviceId) + "FFFFFFFFFFFFFF").substring(0, 14)));
+
+        buf.writeShort(type);
+
+        buf.writeBytes(content);
+
+        buf.writeShort(Checksum.crc16(Checksum.CRC16_CCITT_FALSE, buf.nioBuffer()));
+
+        buf.writeByte('\r');
+        buf.writeByte('\n');
+
+        return buf;
+    }
+
+    @Override
+    protected Object encodeCommand(Command command) {
+
+        ByteBuf content = Unpooled.buffer();
+
+        switch (command.getType()) {
+            case Command.TYPE_POSITION_SINGLE:
+                return encodeContent(command.getDeviceId(), MeiligaoProtocolDecoder.MSG_TRACK_ON_DEMAND, content);
+            case Command.TYPE_POSITION_PERIODIC:
+                content.writeShort(command.getInteger(Command.KEY_FREQUENCY) / 10);
+                return encodeContent(command.getDeviceId(), MeiligaoProtocolDecoder.MSG_TRACK_BY_INTERVAL, content);
+            case Command.TYPE_ENGINE_STOP:
+                content.writeByte(0x01);
+                return encodeContent(command.getDeviceId(), MeiligaoProtocolDecoder.MSG_OUTPUT_CONTROL, content);
+            case Command.TYPE_ENGINE_RESUME:
+                content.writeByte(0x00);
+                return encodeContent(command.getDeviceId(), MeiligaoProtocolDecoder.MSG_OUTPUT_CONTROL, content);
+            case Command.TYPE_ALARM_GEOFENCE:
+                content.writeShort(command.getInteger(Command.KEY_RADIUS));
+                return encodeContent(command.getDeviceId(), MeiligaoProtocolDecoder.MSG_MOVEMENT_ALARM, content);
+            case Command.TYPE_SET_TIMEZONE:
+                int offset = TimeZone.getTimeZone(command.getString(Command.KEY_TIMEZONE)).getRawOffset() / 60000;
+                content.writeBytes(String.valueOf(offset).getBytes(StandardCharsets.US_ASCII));
+                return encodeContent(command.getDeviceId(), MeiligaoProtocolDecoder.MSG_TIME_ZONE, content);
+            case Command.TYPE_REQUEST_PHOTO:
+                return encodeContent(command.getDeviceId(), MeiligaoProtocolDecoder.MSG_TAKE_PHOTO, content);
+            case Command.TYPE_REBOOT_DEVICE:
+                return encodeContent(command.getDeviceId(), MeiligaoProtocolDecoder.MSG_REBOOT_GPS, content);
+            default:
+                return null;
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/MeitrackFrameDecoder.java b/src/main/java/org/traccar/protocol/MeitrackFrameDecoder.java
new file mode 100644
index 000000000..d122bca0c
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/MeitrackFrameDecoder.java
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2014 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+import org.traccar.BaseFrameDecoder;
+
+import java.nio.charset.StandardCharsets;
+
+public class MeitrackFrameDecoder extends BaseFrameDecoder {
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+        if (buf.readableBytes() < 10) {
+            return null;
+        }
+
+        int index = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) ',');
+        if (index != -1) {
+            int length = index - buf.readerIndex() + Integer.parseInt(
+                    buf.toString(buf.readerIndex() + 3, index - buf.readerIndex() - 3, StandardCharsets.US_ASCII));
+            if (buf.readableBytes() >= length) {
+                return buf.readRetainedSlice(length);
+            }
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/MeitrackProtocol.java b/src/main/java/org/traccar/protocol/MeitrackProtocol.java
new file mode 100644
index 000000000..c887cd3a0
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/MeitrackProtocol.java
@@ -0,0 +1,54 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+import org.traccar.model.Command;
+
+public class MeitrackProtocol extends BaseProtocol {
+
+    public MeitrackProtocol() {
+        setSupportedDataCommands(
+                Command.TYPE_POSITION_SINGLE,
+                Command.TYPE_ENGINE_STOP,
+                Command.TYPE_ENGINE_RESUME,
+                Command.TYPE_ALARM_ARM,
+                Command.TYPE_ALARM_DISARM,
+                Command.TYPE_REQUEST_PHOTO,
+                Command.TYPE_SEND_SMS);
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new MeitrackFrameDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new MeitrackProtocolEncoder());
+                pipeline.addLast(new MeitrackProtocolDecoder(MeitrackProtocol.this));
+            }
+        });
+        addServer(new TrackerServer(true, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new MeitrackProtocolEncoder());
+                pipeline.addLast(new MeitrackProtocolDecoder(MeitrackProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/MeitrackProtocolDecoder.java b/src/main/java/org/traccar/protocol/MeitrackProtocolDecoder.java
new file mode 100644
index 000000000..55260ef0c
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/MeitrackProtocolDecoder.java
@@ -0,0 +1,534 @@
+/*
+ * Copyright 2012 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.Context;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.Checksum;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.CellTower;
+import org.traccar.model.Network;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.Date;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.regex.Pattern;
+
+public class MeitrackProtocolDecoder extends BaseProtocolDecoder {
+
+    private ByteBuf photo;
+
+    public MeitrackProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("$$").expression(".")          // flag
+            .number("d+,")                       // length
+            .number("(d+),")                     // imei
+            .number("xxx,")                      // command
+            .number("d+,").optional()
+            .number("(d+),")                     // event
+            .number("(-?d+.d+),")                // latitude
+            .number("(-?d+.d+),")                // longitude
+            .number("(dd)(dd)(dd)")              // date (yymmdd)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .number("([AV]),")                   // validity
+            .number("(d+),")                     // satellites
+            .number("(d+),")                     // rssi
+            .number("(d+.?d*),")                 // speed
+            .number("(d+),")                     // course
+            .number("(d+.?d*),")                 // hdop
+            .number("(-?d+),")                   // altitude
+            .number("(d+),")                     // odometer
+            .number("(d+),")                     // runtime
+            .number("(d+)|")                     // mcc
+            .number("(d+)|")                     // mnc
+            .number("(x+)|")                     // lac
+            .number("(x+),")                     // cid
+            .number("(x+),")                     // state
+            .number("(x+)?|")                    // adc1
+            .number("(x+)?|")                    // adc2
+            .number("(x+)?|")                    // adc3
+            .number("(x+)|")                     // battery
+            .number("(x+)?,")                    // power
+            .groupBegin()
+            .expression("([^,]+)?,").optional()  // event specific
+            .expression("[^,]*,")                // reserved
+            .number("(d+)?,")                    // protocol
+            .number("(x{4})?")                   // fuel
+            .groupBegin()
+            .number(",(x{6}(?:|x{6})*)?")        // temperature
+            .groupBegin()
+            .number(",(d+)")                     // data count
+            .expression(",([^*]*)")              // data
+            .groupEnd("?")
+            .groupEnd("?")
+            .or()
+            .any()
+            .groupEnd()
+            .text("*")
+            .number("xx")
+            .text("\r\n").optional()
+            .compile();
+
+    private String decodeAlarm(int event) {
+        switch (event) {
+            case 1:
+                return Position.ALARM_SOS;
+            case 17:
+                return Position.ALARM_LOW_BATTERY;
+            case 18:
+                return Position.ALARM_LOW_POWER;
+            case 19:
+                return Position.ALARM_OVERSPEED;
+            case 20:
+                return Position.ALARM_GEOFENCE_ENTER;
+            case 21:
+                return Position.ALARM_GEOFENCE_EXIT;
+            case 22:
+                return Position.ALARM_POWER_RESTORED;
+            case 23:
+                return Position.ALARM_POWER_CUT;
+            case 36:
+                return Position.ALARM_TOW;
+            case 44:
+                return Position.ALARM_JAMMING;
+            case 78:
+                return Position.ALARM_ACCIDENT;
+            case 90:
+            case 91:
+                return Position.ALARM_CORNERING;
+            case 129:
+                return Position.ALARM_BRAKING;
+            case 130:
+                return Position.ALARM_ACCELERATION;
+            case 135:
+                return Position.ALARM_FATIGUE_DRIVING;
+            default:
+                return null;
+        }
+    }
+
+    private Position decodeRegular(Channel channel, SocketAddress remoteAddress, ByteBuf buf) {
+
+        Parser parser = new Parser(PATTERN, buf.toString(StandardCharsets.US_ASCII));
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        int event = parser.nextInt(0);
+        position.set(Position.KEY_EVENT, event);
+        position.set(Position.KEY_ALARM, decodeAlarm(event));
+
+        position.setLatitude(parser.nextDouble(0));
+        position.setLongitude(parser.nextDouble(0));
+
+        position.setTime(parser.nextDateTime());
+
+        position.setValid(parser.next().equals("A"));
+
+        position.set(Position.KEY_SATELLITES, parser.nextInt());
+        int rssi = parser.nextInt(0);
+
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
+        position.setCourse(parser.nextDouble(0));
+
+        position.set(Position.KEY_HDOP, parser.nextDouble());
+
+        position.setAltitude(parser.nextDouble(0));
+
+        position.set(Position.KEY_ODOMETER, parser.nextInt(0));
+        position.set("runtime", parser.next());
+
+        position.setNetwork(new Network(CellTower.from(
+                parser.nextInt(0), parser.nextInt(0), parser.nextHexInt(0), parser.nextHexInt(0), rssi)));
+
+        position.set(Position.KEY_STATUS, parser.next());
+
+        for (int i = 1; i <= 3; i++) {
+            if (parser.hasNext()) {
+                position.set(Position.PREFIX_ADC + i, parser.nextHexInt(0));
+            }
+        }
+
+        String deviceModel = Context.getIdentityManager().getById(deviceSession.getDeviceId()).getModel();
+        if (deviceModel == null) {
+            deviceModel = "";
+        }
+        switch (deviceModel.toUpperCase()) {
+            case "MVT340":
+            case "MVT380":
+                position.set(Position.KEY_BATTERY, parser.nextHexInt(0) * 3.0 * 2.0 / 1024.0);
+                position.set(Position.KEY_POWER, parser.nextHexInt(0) * 3.0 * 16.0 / 1024.0);
+                break;
+            case "MT90":
+                position.set(Position.KEY_BATTERY, parser.nextHexInt(0) * 3.3 * 2.0 / 4096.0);
+                position.set(Position.KEY_POWER, parser.nextHexInt(0));
+                break;
+            case "T1":
+            case "T3":
+            case "MVT100":
+            case "MVT600":
+            case "MVT800":
+            case "TC68":
+            case "TC68S":
+                position.set(Position.KEY_BATTERY, parser.nextHexInt(0) * 3.3 * 2.0 / 4096.0);
+                position.set(Position.KEY_POWER, parser.nextHexInt(0) * 3.3 * 16.0 / 4096.0);
+                break;
+            case "T311":
+            case "T322X":
+            case "T333":
+            case "T355":
+                position.set(Position.KEY_BATTERY, parser.nextHexInt(0) / 100.0);
+                position.set(Position.KEY_POWER, parser.nextHexInt(0) / 100.0);
+                break;
+            default:
+                position.set(Position.KEY_BATTERY, parser.nextHexInt(0));
+                position.set(Position.KEY_POWER, parser.nextHexInt(0));
+                break;
+        }
+
+        String eventData = parser.next();
+        if (eventData != null && !eventData.isEmpty()) {
+            switch (event) {
+                case 37:
+                    position.set(Position.KEY_DRIVER_UNIQUE_ID, eventData);
+                    break;
+                default:
+                    position.set("eventData", eventData);
+                    break;
+            }
+        }
+
+        int protocol = parser.nextInt(0);
+
+        if (parser.hasNext()) {
+            String fuel = parser.next();
+            position.set(Position.KEY_FUEL_LEVEL,
+                    Integer.parseInt(fuel.substring(0, 2), 16) + Integer.parseInt(fuel.substring(2), 16) * 0.01);
+        }
+
+        if (parser.hasNext()) {
+            for (String temp : parser.next().split("\\|")) {
+                int index = Integer.parseInt(temp.substring(0, 2), 16);
+                if (protocol >= 3) {
+                    double value = (short) Integer.parseInt(temp.substring(2), 16);
+                    position.set(Position.PREFIX_TEMP + index, value * 0.01);
+                } else {
+                    double value = Byte.parseByte(temp.substring(2, 4), 16);
+                    value += (value < 0 ? -0.01 : 0.01) * Integer.parseInt(temp.substring(4), 16);
+                    position.set(Position.PREFIX_TEMP + index, value);
+                }
+            }
+        }
+
+        if (parser.hasNext(2)) {
+            parser.nextInt(); // count
+            decodeDataFields(position, parser.next().split(","));
+        }
+
+        return position;
+    }
+
+    private void decodeDataFields(Position position, String[] values) {
+
+        if (values.length > 1 && !values[1].isEmpty()) {
+            position.set("tempData", values[1]);
+        }
+
+        if (values.length > 5 && !values[5].isEmpty()) {
+            String[] data = values[5].split("\\|");
+            boolean started = data[0].charAt(1) == '0';
+            position.set("taximeterOn", started);
+            position.set("taximeterStart", data[1]);
+            if (data.length > 2) {
+                position.set("taximeterEnd", data[2]);
+                position.set("taximeterDistance", Integer.parseInt(data[3]));
+                position.set("taximeterFare", Integer.parseInt(data[4]));
+                position.set("taximeterTrip", data[5]);
+                position.set("taximeterWait", data[6]);
+            }
+        }
+
+    }
+
+    private List<Position> decodeBinaryC(Channel channel, SocketAddress remoteAddress, ByteBuf buf) {
+        List<Position> positions = new LinkedList<>();
+
+        String flag = buf.toString(2, 1, StandardCharsets.US_ASCII);
+        int index = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) ',');
+
+        String imei = buf.toString(index + 1, 15, StandardCharsets.US_ASCII);
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        buf.skipBytes(index + 1 + 15 + 1 + 3 + 1 + 2 + 2 + 4);
+
+        while (buf.readableBytes() >= 0x34) {
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            position.set(Position.KEY_EVENT, buf.readUnsignedByte());
+
+            position.setLatitude(buf.readIntLE() * 0.000001);
+            position.setLongitude(buf.readIntLE() * 0.000001);
+
+            position.setTime(new Date((946684800 + buf.readUnsignedIntLE()) * 1000)); // 946684800 = 2000-01-01
+
+            position.setValid(buf.readUnsignedByte() == 1);
+
+            position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
+            int rssi = buf.readUnsignedByte();
+
+            position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShortLE()));
+            position.setCourse(buf.readUnsignedShortLE());
+
+            position.set(Position.KEY_HDOP, buf.readUnsignedShortLE() * 0.1);
+
+            position.setAltitude(buf.readUnsignedShortLE());
+
+            position.set(Position.KEY_ODOMETER, buf.readUnsignedIntLE());
+            position.set("runtime", buf.readUnsignedIntLE());
+
+            position.setNetwork(new Network(CellTower.from(
+                    buf.readUnsignedShortLE(), buf.readUnsignedShortLE(),
+                    buf.readUnsignedShortLE(), buf.readUnsignedShortLE(),
+                    rssi)));
+
+            position.set(Position.KEY_STATUS, buf.readUnsignedShortLE());
+
+            position.set(Position.PREFIX_ADC + 1, buf.readUnsignedShortLE());
+            position.set(Position.KEY_BATTERY, buf.readUnsignedShortLE() * 0.01);
+            position.set(Position.KEY_POWER, buf.readUnsignedShortLE());
+
+            buf.readUnsignedIntLE(); // geo-fence
+
+            positions.add(position);
+        }
+
+        if (channel != null) {
+            StringBuilder command = new StringBuilder("@@");
+            command.append(flag).append(27 + positions.size() / 10).append(",");
+            command.append(imei).append(",CCC,").append(positions.size()).append("*");
+            int checksum = 0;
+            for (int i = 0; i < command.length(); i += 1) {
+                checksum += command.charAt(i);
+            }
+            command.append(String.format("%02x", checksum & 0xff).toUpperCase());
+            command.append("\r\n");
+            channel.writeAndFlush(new NetworkMessage(command.toString(), remoteAddress)); // delete processed data
+        }
+
+        return positions;
+    }
+
+    private List<Position> decodeBinaryE(Channel channel, SocketAddress remoteAddress, ByteBuf buf) {
+        List<Position> positions = new LinkedList<>();
+
+        buf.readerIndex(buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) ',') + 1);
+        String imei = buf.readSlice(15).toString(StandardCharsets.US_ASCII);
+        buf.skipBytes(1 + 3 + 1);
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        buf.readUnsignedIntLE(); // remaining cache
+        int count = buf.readUnsignedShortLE();
+
+        for (int i = 0; i < count; i++) {
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            buf.readUnsignedShortLE(); // length
+            buf.readUnsignedShortLE(); // index
+
+            int paramCount = buf.readUnsignedByte();
+            for (int j = 0; j < paramCount; j++) {
+                int id = buf.readUnsignedByte();
+                switch (id) {
+                    case 0x01:
+                        position.set(Position.KEY_EVENT, buf.readUnsignedByte());
+                        break;
+                    case 0x05:
+                        position.setValid(buf.readUnsignedByte() > 0);
+                        break;
+                    case 0x06:
+                        position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
+                        break;
+                    case 0x07:
+                        position.set(Position.KEY_RSSI, buf.readUnsignedByte());
+                        break;
+                    default:
+                        buf.readUnsignedByte();
+                        break;
+                }
+            }
+
+            paramCount = buf.readUnsignedByte();
+            for (int j = 0; j < paramCount; j++) {
+                int id = buf.readUnsignedByte();
+                switch (id) {
+                    case 0x08:
+                        position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShortLE()));
+                        break;
+                    case 0x09:
+                        position.setCourse(buf.readUnsignedShortLE());
+                        break;
+                    case 0x0B:
+                        position.setAltitude(buf.readShortLE());
+                        break;
+                    case 0x19:
+                        position.set(Position.KEY_BATTERY, buf.readUnsignedShortLE() * 0.01);
+                        break;
+                    case 0x1A:
+                        position.set(Position.KEY_POWER, buf.readUnsignedShortLE() * 0.01);
+                        break;
+                    default:
+                        buf.readUnsignedShortLE();
+                        break;
+                }
+            }
+
+            paramCount = buf.readUnsignedByte();
+            for (int j = 0; j < paramCount; j++) {
+                int id = buf.readUnsignedByte();
+                switch (id) {
+                    case 0x02:
+                        position.setLatitude(buf.readIntLE() * 0.000001);
+                        break;
+                    case 0x03:
+                        position.setLongitude(buf.readIntLE() * 0.000001);
+                        break;
+                    case 0x04:
+                        position.setTime(new Date((946684800 + buf.readUnsignedIntLE()) * 1000)); // 2000-01-01
+                        break;
+                    case 0x0D:
+                        position.set("runtime", buf.readUnsignedIntLE());
+                        break;
+                    default:
+                        buf.readUnsignedIntLE();
+                        break;
+                }
+            }
+
+            paramCount = buf.readUnsignedByte();
+            for (int j = 0; j < paramCount; j++) {
+                buf.readUnsignedByte(); // id
+                buf.skipBytes(buf.readUnsignedByte()); // value
+            }
+
+            positions.add(position);
+        }
+
+        return positions;
+    }
+
+    private void requestPhotoPacket(Channel channel, SocketAddress socketAddress, String imei, String file, int index) {
+        if (channel != null) {
+            String content = "D00," + file + "," + index;
+            int length = 1 + imei.length() + 1 + content.length() + 5;
+            String response = String.format("@@O%02d,%s,%s*", length, imei, content);
+            response += Checksum.sum(response) + "\r\n";
+            channel.writeAndFlush(new NetworkMessage(response, socketAddress));
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        int index = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) ',');
+        String imei = buf.toString(index + 1, 15, StandardCharsets.US_ASCII);
+        index = buf.indexOf(index + 1, buf.writerIndex(), (byte) ',');
+        String type = buf.toString(index + 1, 3, StandardCharsets.US_ASCII);
+
+        switch (type) {
+            case "D00":
+                if (photo == null) {
+                    photo = Unpooled.buffer();
+                }
+
+                index = index + 1 + type.length() + 1;
+                int endIndex =  buf.indexOf(index, buf.writerIndex(), (byte) ',');
+                String file = buf.toString(index, endIndex - index, StandardCharsets.US_ASCII);
+                index = endIndex + 1;
+                endIndex =  buf.indexOf(index, buf.writerIndex(), (byte) ',');
+                int total = Integer.parseInt(buf.toString(index, endIndex - index, StandardCharsets.US_ASCII));
+                index = endIndex + 1;
+                endIndex = buf.indexOf(index, buf.writerIndex(), (byte) ',');
+                int current = Integer.parseInt(buf.toString(index, endIndex - index, StandardCharsets.US_ASCII));
+
+                buf.readerIndex(endIndex + 1);
+                photo.writeBytes(buf.readSlice(buf.readableBytes() - 1 - 2 - 2));
+
+                if (current == total - 1) {
+                    Position position = new Position(getProtocolName());
+                    position.setDeviceId(getDeviceSession(channel, remoteAddress, imei).getDeviceId());
+
+                    getLastLocation(position, null);
+
+                    position.set(Position.KEY_IMAGE, Context.getMediaManager().writeFile(imei, photo, "jpg"));
+                    photo.release();
+                    photo = null;
+
+                    return position;
+                } else {
+                    if ((current + 1) % 8 == 0) {
+                        requestPhotoPacket(channel, remoteAddress, imei, file, current + 1);
+                    }
+                    return null;
+                }
+            case "D03":
+                photo = Unpooled.buffer();
+                requestPhotoPacket(channel, remoteAddress, imei, "camera_picture.jpg", 0);
+                return null;
+            case "CCC":
+                return decodeBinaryC(channel, remoteAddress, buf);
+            case "CCE":
+                return decodeBinaryE(channel, remoteAddress, buf);
+            default:
+                return decodeRegular(channel, remoteAddress, buf);
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/MeitrackProtocolEncoder.java b/src/main/java/org/traccar/protocol/MeitrackProtocolEncoder.java
new file mode 100644
index 000000000..abb6ec9d4
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/MeitrackProtocolEncoder.java
@@ -0,0 +1,65 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.Context;
+import org.traccar.StringProtocolEncoder;
+import org.traccar.helper.Checksum;
+import org.traccar.model.Command;
+
+import java.util.Map;
+
+public class MeitrackProtocolEncoder extends StringProtocolEncoder {
+
+    private Object formatCommand(Command command, char dataId, String content) {
+        String uniqueId = getUniqueId(command.getDeviceId());
+        int length = 1 + uniqueId.length() + 1 + content.length() + 5;
+        String result = String.format("@@%c%02d,%s,%s*", dataId, length, uniqueId, content);
+        result += Checksum.sum(result) + "\r\n";
+        return result;
+    }
+
+    @Override
+    protected Object encodeCommand(Command command) {
+
+        Map<String, Object> attributes = command.getAttributes();
+
+        boolean alternative = Context.getIdentityManager().lookupAttributeBoolean(
+                command.getDeviceId(), "meitrack.alternative", false, true);
+
+        switch (command.getType()) {
+            case Command.TYPE_POSITION_SINGLE:
+                return formatCommand(command, 'Q', "A10");
+            case Command.TYPE_ENGINE_STOP:
+                return formatCommand(command, 'M', "C01,0,12222");
+            case Command.TYPE_ENGINE_RESUME:
+                return formatCommand(command, 'M', "C01,0,02222");
+            case Command.TYPE_ALARM_ARM:
+                return formatCommand(command, 'M', alternative ? "B21,1" : "C01,0,22122");
+            case Command.TYPE_ALARM_DISARM:
+                return formatCommand(command, 'M', alternative ? "B21,0" : "C01,0,22022");
+            case Command.TYPE_REQUEST_PHOTO:
+                int index = command.getInteger(Command.KEY_INDEX);
+                return formatCommand(command, 'D', "D03," + (index > 0 ? index : 1) + ",camera_picture.jpg");
+            case Command.TYPE_SEND_SMS:
+                return formatCommand(command, 'f', "C02,0,"
+                        + attributes.get(Command.KEY_PHONE) + "," + attributes.get(Command.KEY_MESSAGE));
+            default:
+                return null;
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/MilesmateProtocol.java b/src/main/java/org/traccar/protocol/MilesmateProtocol.java
new file mode 100644
index 000000000..822711603
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/MilesmateProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LineBasedFrameDecoder;
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class MilesmateProtocol extends BaseProtocol {
+
+    public MilesmateProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LineBasedFrameDecoder(1024));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new MilesmateProtocolDecoder(MilesmateProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/MilesmateProtocolDecoder.java b/src/main/java/org/traccar/protocol/MilesmateProtocolDecoder.java
new file mode 100644
index 000000000..901ceb8f7
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/MilesmateProtocolDecoder.java
@@ -0,0 +1,108 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class MilesmateProtocolDecoder extends BaseProtocolDecoder {
+
+    public MilesmateProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("ApiString={")
+            .number("A:(d+),")                   // imei
+            .number("B:(d+.d+),")                // battery
+            .number("C:(d+.d+),")                // adc
+            .number("D:(dd)(dd)(dd),")           // time (hhmmss)
+            .number("E:(dd)(dd.d+)([NS]),")      // latitude
+            .number("F:(ddd)(dd.d+)([EW]),")     // longitude
+            .number("G:(d+.d+),")                // speed
+            .number("H:(dd)(dd)(dd),")           // date (ddmmyy)
+            .expression("I:[GL],")               // location source
+            .number("J:(d{8}),")                 // flags
+            .number("K:(d{7})")                  // flags
+            .expression("([AV]),")               // validity
+            .number("L:d{4},")                   // pin
+            .number("M:(d+.d+)")                 // course
+            .text("}")
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        if (channel != null) {
+            channel.writeAndFlush(new NetworkMessage("+##Received OK\n", remoteAddress));
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.set(Position.KEY_BATTERY, parser.nextDouble());
+        position.set(Position.PREFIX_ADC + 1, parser.nextDouble());
+
+        DateBuilder dateBuilder = new DateBuilder()
+                .setTime(parser.nextInt(), parser.nextInt(), parser.nextInt());
+
+        position.setLatitude(parser.nextCoordinate());
+        position.setLongitude(parser.nextCoordinate());
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble()));
+
+        dateBuilder.setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt());
+        position.setTime(dateBuilder.getDate());
+
+        String flags = parser.next();
+        position.set(Position.KEY_IGNITION, flags.charAt(0) == '1');
+        position.set(Position.KEY_ALARM, flags.charAt(1) == '1' ? Position.ALARM_SOS : null);
+        position.set(Position.KEY_CHARGE, flags.charAt(5) == '1');
+        position.set(Position.KEY_ALARM, flags.charAt(7) == '1' ? Position.ALARM_OVERSPEED : null);
+
+        flags = parser.next();
+        position.set(Position.KEY_BLOCKED, flags.charAt(0) == '1');
+        position.set(Position.KEY_ALARM, flags.charAt(1) == '1' ? Position.ALARM_TOW : null);
+
+        position.setValid(parser.next().equals("A"));
+
+        position.setCourse(parser.nextDouble());
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/MiniFinderProtocol.java b/src/main/java/org/traccar/protocol/MiniFinderProtocol.java
new file mode 100644
index 000000000..d4a154053
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/MiniFinderProtocol.java
@@ -0,0 +1,53 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.CharacterDelimiterFrameDecoder;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+import org.traccar.model.Command;
+
+public class MiniFinderProtocol extends BaseProtocol {
+
+    public MiniFinderProtocol() {
+        setSupportedDataCommands(
+                Command.TYPE_SET_TIMEZONE,
+                Command.TYPE_VOICE_MONITORING,
+                Command.TYPE_ALARM_SPEED,
+                Command.TYPE_ALARM_GEOFENCE,
+                Command.TYPE_ALARM_VIBRATION,
+                Command.TYPE_SET_AGPS,
+                Command.TYPE_ALARM_FALL,
+                Command.TYPE_MODE_POWER_SAVING,
+                Command.TYPE_MODE_DEEP_SLEEP,
+                Command.TYPE_SOS_NUMBER,
+                Command.TYPE_SET_INDICATOR);
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, ';'));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new MiniFinderProtocolEncoder());
+                pipeline.addLast(new MiniFinderProtocolDecoder(MiniFinderProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/MiniFinderProtocolDecoder.java b/src/main/java/org/traccar/protocol/MiniFinderProtocolDecoder.java
new file mode 100644
index 000000000..2b7a960c4
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/MiniFinderProtocolDecoder.java
@@ -0,0 +1,208 @@
+/*
+ * Copyright 2014 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class MiniFinderProtocolDecoder extends BaseProtocolDecoder {
+
+    public MiniFinderProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN_FIX = new PatternBuilder()
+            .number("(d+)/(d+)/(d+),")           // date (dd/mm/yy)
+            .number("(d+):(d+):(d+),")           // time (hh:mm:ss)
+            .number("(-?d+.d+),")                // latitude
+            .number("(-?d+.d+),")                // longitude
+            .compile();
+
+    private static final Pattern PATTERN_STATE = new PatternBuilder()
+            .number("(d+.?d*),")                 // speed (km/h)
+            .number("(d+.?d*),")                 // course
+            .number("(x+),")                     // flags
+            .number("(-?d+.d+),")                // altitude (meters)
+            .number("(d+),")                     // battery (percentage)
+            .compile();
+
+    private static final Pattern PATTERN_A = new PatternBuilder()
+            .text("!A,")
+            .expression(PATTERN_FIX.pattern())
+            .any()                               // unknown 3 fields
+            .compile();
+
+   private static final Pattern PATTERN_C = new PatternBuilder()
+            .text("!C,")
+            .expression(PATTERN_FIX.pattern())
+            .expression(PATTERN_STATE.pattern())
+            .any()                               // unknown 3 fields
+            .compile();
+
+    private static final Pattern PATTERN_BD = new PatternBuilder()
+            .expression("![BD],")                // B - buffered, D - live
+            .expression(PATTERN_FIX.pattern())
+            .expression(PATTERN_STATE.pattern())
+            .number("(d+),")                     // satellites in use
+            .number("(d+),")                     // satellites in view
+            .number("(d+.?d*)")                  // hdop
+            .compile();
+
+    private void decodeFix(Position position, Parser parser) {
+
+        position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
+        position.setLatitude(parser.nextDouble(0));
+        position.setLongitude(parser.nextDouble(0));
+    }
+
+    private void decodeFlags(Position position, int flags) {
+
+        position.setValid(BitUtil.to(flags, 2) > 0);
+        if (BitUtil.check(flags, 1)) {
+            position.set(Position.KEY_APPROXIMATE, true);
+        }
+
+        if (BitUtil.check(flags, 2)) {
+            position.set(Position.KEY_ALARM, Position.ALARM_FAULT);
+        }
+        if (BitUtil.check(flags, 6)) {
+            position.set(Position.KEY_ALARM, Position.ALARM_SOS);
+        }
+        if (BitUtil.check(flags, 7)) {
+            position.set(Position.KEY_ALARM, Position.ALARM_OVERSPEED);
+        }
+        if (BitUtil.check(flags, 8)) {
+            position.set(Position.KEY_ALARM, Position.ALARM_FALL_DOWN);
+        }
+        if (BitUtil.check(flags, 9) || BitUtil.check(flags, 10) || BitUtil.check(flags, 11)) {
+            position.set(Position.KEY_ALARM, Position.ALARM_GEOFENCE);
+        }
+        if (BitUtil.check(flags, 12)) {
+            position.set(Position.KEY_ALARM, Position.ALARM_LOW_BATTERY);
+        }
+        if (BitUtil.check(flags, 15) || BitUtil.check(flags, 14)) {
+            position.set(Position.KEY_ALARM, Position.ALARM_MOVEMENT);
+        }
+
+        position.set(Position.KEY_RSSI, BitUtil.between(flags, 16, 21));
+        position.set(Position.KEY_CHARGE, BitUtil.check(flags, 22));
+    }
+
+    private void decodeState(Position position, Parser parser) {
+
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
+
+        position.setCourse(parser.nextDouble(0));
+        if (position.getCourse() > 360) {
+            position.setCourse(0);
+        }
+
+        decodeFlags(position, parser.nextHexInt(0));
+
+        position.setAltitude(parser.nextDouble(0));
+
+        position.set(Position.KEY_BATTERY_LEVEL, parser.nextInt(0));
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        String sentence = (String) msg;
+
+        if (sentence.startsWith("!1,")) {
+            int index = sentence.indexOf(',', 3);
+            if (index < 0) {
+                index = sentence.length();
+            }
+            getDeviceSession(channel, remoteAddress, sentence.substring(3, index));
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+        if (deviceSession == null || !sentence.matches("![3A-D],.*")) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        String type = sentence.substring(1, 2);
+        position.set(Position.KEY_TYPE, type);
+
+        if (type.equals("3")) {
+
+            getLastLocation(position, null);
+
+            position.set(Position.KEY_RESULT, sentence.substring(3));
+
+            return position;
+
+        } else if (type.equals("B") || type.equals("D")) {
+
+            Parser parser = new Parser(PATTERN_BD, sentence);
+            if (!parser.matches()) {
+                return null;
+            }
+
+            decodeFix(position, parser);
+            decodeState(position, parser);
+
+            position.set(Position.KEY_SATELLITES, parser.nextInt(0));
+            position.set(Position.KEY_SATELLITES_VISIBLE, parser.nextInt(0));
+            position.set(Position.KEY_HDOP, parser.nextDouble(0));
+
+            return position;
+
+        } else if (type.equals("C")) {
+
+            Parser parser = new Parser(PATTERN_C, sentence);
+            if (!parser.matches()) {
+                return null;
+            }
+
+            decodeFix(position, parser);
+            decodeState(position, parser);
+
+            return position;
+
+        } else if (type.equals("A")) {
+
+            Parser parser = new Parser(PATTERN_A, sentence);
+            if (!parser.matches()) {
+                return null;
+            }
+
+            decodeFix(position, parser);
+
+            return position;
+
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/MiniFinderProtocolEncoder.java b/src/main/java/org/traccar/protocol/MiniFinderProtocolEncoder.java
new file mode 100644
index 000000000..7a3d5b226
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/MiniFinderProtocolEncoder.java
@@ -0,0 +1,82 @@
+/*
+ * Copyright 2016 - 2017 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import java.util.TimeZone;
+
+import org.traccar.StringProtocolEncoder;
+import org.traccar.model.Command;
+
+public class MiniFinderProtocolEncoder extends StringProtocolEncoder implements StringProtocolEncoder.ValueFormatter {
+
+    @Override
+    public String formatValue(String key, Object value) {
+        switch (key) {
+            case Command.KEY_ENABLE:
+                return (Boolean) value ? "1" : "0";
+            case Command.KEY_TIMEZONE:
+                return String.format("%+03d", TimeZone.getTimeZone((String) value).getRawOffset() / 3600000);
+            case Command.KEY_INDEX:
+                switch (((Number) value).intValue()) {
+                    case 0:
+                        return "A";
+                    case 1:
+                        return "B";
+                    case 2:
+                        return "C";
+                    default:
+                        return null;
+                }
+            default:
+                return null;
+        }
+    }
+
+    @Override
+    protected Object encodeCommand(Command command) {
+
+        initDevicePassword(command, "123456");
+
+        switch (command.getType()) {
+            case Command.TYPE_SET_TIMEZONE:
+                return formatCommand(command, "{%s}L{%s}", this, Command.KEY_DEVICE_PASSWORD, Command.KEY_TIMEZONE);
+            case Command.TYPE_VOICE_MONITORING:
+                return formatCommand(command, "{%s}P{%s}", this, Command.KEY_DEVICE_PASSWORD, Command.KEY_ENABLE);
+            case Command.TYPE_ALARM_SPEED:
+                return formatCommand(command, "{%s}J1{%s}", Command.KEY_DEVICE_PASSWORD, Command.KEY_DATA);
+            case Command.TYPE_ALARM_GEOFENCE:
+                return formatCommand(command, "{%s}R1{%s}", Command.KEY_DEVICE_PASSWORD, Command.KEY_RADIUS);
+            case Command.TYPE_ALARM_VIBRATION:
+                return formatCommand(command, "{%s}W1,{%s}", Command.KEY_DEVICE_PASSWORD, Command.KEY_DATA);
+            case Command.TYPE_SET_AGPS:
+                return formatCommand(command, "{%s}AGPS{%s}", this, Command.KEY_DEVICE_PASSWORD, Command.KEY_ENABLE);
+            case Command.TYPE_ALARM_FALL:
+                return formatCommand(command, "{%s}F{%s}", this, Command.KEY_DEVICE_PASSWORD, Command.KEY_ENABLE);
+            case Command.TYPE_MODE_POWER_SAVING:
+                return formatCommand(command, "{%s}SP{%s}", this, Command.KEY_DEVICE_PASSWORD, Command.KEY_ENABLE);
+            case Command.TYPE_MODE_DEEP_SLEEP:
+                return formatCommand(command, "{%s}DS{%s}", this, Command.KEY_DEVICE_PASSWORD, Command.KEY_ENABLE);
+            case Command.TYPE_SOS_NUMBER:
+                return formatCommand(command, "{%s}{%s}1,{%s}", this,
+                        Command.KEY_DEVICE_PASSWORD, Command.KEY_INDEX, Command.KEY_PHONE);
+            case Command.TYPE_SET_INDICATOR:
+                return formatCommand(command, "{%s}LED{%s}", Command.KEY_DEVICE_PASSWORD, Command.KEY_DATA);
+            default:
+                return null;
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Mta6Protocol.java b/src/main/java/org/traccar/protocol/Mta6Protocol.java
new file mode 100644
index 000000000..632a7df80
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Mta6Protocol.java
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.http.HttpObjectAggregator;
+import io.netty.handler.codec.http.HttpRequestDecoder;
+import io.netty.handler.codec.http.HttpResponseEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.Context;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class Mta6Protocol extends BaseProtocol {
+
+    public Mta6Protocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new HttpResponseEncoder());
+                pipeline.addLast(new HttpRequestDecoder());
+                pipeline.addLast(new HttpObjectAggregator(65535));
+                pipeline.addLast(new Mta6ProtocolDecoder(
+                        Mta6Protocol.this, !Context.getConfig().getBoolean(getName() + ".can")));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Mta6ProtocolDecoder.java b/src/main/java/org/traccar/protocol/Mta6ProtocolDecoder.java
new file mode 100644
index 000000000..88419b871
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Mta6ProtocolDecoder.java
@@ -0,0 +1,319 @@
+/*
+ * Copyright 2013 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import io.netty.handler.codec.http.DefaultFullHttpResponse;
+import io.netty.handler.codec.http.FullHttpRequest;
+import io.netty.handler.codec.http.FullHttpResponse;
+import io.netty.handler.codec.http.HttpResponseStatus;
+import io.netty.handler.codec.http.HttpVersion;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.Date;
+import java.util.LinkedList;
+import java.util.List;
+
+public class Mta6ProtocolDecoder extends BaseProtocolDecoder {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(Mta6ProtocolDecoder.class);
+
+    private final boolean simple;
+
+    public Mta6ProtocolDecoder(Protocol protocol, boolean simple) {
+        super(protocol);
+        this.simple = simple;
+    }
+
+    private void sendContinue(Channel channel) {
+        FullHttpResponse response = new DefaultFullHttpResponse(
+                HttpVersion.HTTP_1_1, HttpResponseStatus.CONTINUE);
+        channel.writeAndFlush(new NetworkMessage(response, channel.remoteAddress()));
+    }
+
+    private void sendResponse(Channel channel, short packetId, short packetCount) {
+        ByteBuf begin = Unpooled.copiedBuffer("#ACK#", StandardCharsets.US_ASCII);
+        ByteBuf end = Unpooled.buffer(3);
+        end.writeByte(packetId);
+        end.writeByte(packetCount);
+        end.writeByte(0);
+
+        FullHttpResponse response = new DefaultFullHttpResponse(
+                HttpVersion.HTTP_1_1, HttpResponseStatus.OK, Unpooled.wrappedBuffer(begin, end));
+        channel.writeAndFlush(new NetworkMessage(response, channel.remoteAddress()));
+    }
+
+    private static class FloatReader {
+
+        private int previousFloat;
+
+        public float readFloat(ByteBuf buf) {
+            switch (buf.getUnsignedByte(buf.readerIndex()) >> 6) {
+                case 0:
+                    previousFloat = buf.readInt() << 2;
+                    break;
+                case 1:
+                    previousFloat = (previousFloat & 0xffffff00) + ((buf.readUnsignedByte() & 0x3f) << 2);
+                    break;
+                case 2:
+                    previousFloat = (previousFloat & 0xffff0000) + ((buf.readUnsignedShort() & 0x3fff) << 2);
+                    break;
+                case 3:
+                    previousFloat = (previousFloat & 0xff000000) + ((buf.readUnsignedMedium() & 0x3fffff) << 2);
+                    break;
+                default:
+                    LOGGER.warn("MTA6 float decoding error", new IllegalArgumentException());
+                    break;
+            }
+            return Float.intBitsToFloat(previousFloat);
+        }
+
+    }
+
+    private static class TimeReader extends FloatReader {
+
+        private long weekNumber;
+
+        public Date readTime(ByteBuf buf) {
+            long weekTime = (long) (readFloat(buf) * 1000);
+            if (weekNumber == 0) {
+                weekNumber = buf.readUnsignedShort();
+            }
+
+            DateBuilder dateBuilder = new DateBuilder().setDate(1980, 1, 6);
+            dateBuilder.addMillis(weekNumber * 7 * 24 * 60 * 60 * 1000 + weekTime);
+
+            return dateBuilder.getDate();
+        }
+
+    }
+
+    private List<Position> parseFormatA(DeviceSession deviceSession, ByteBuf buf) {
+        List<Position> positions = new LinkedList<>();
+
+        FloatReader latitudeReader = new FloatReader();
+        FloatReader longitudeReader = new FloatReader();
+        TimeReader timeReader = new TimeReader();
+
+        try {
+            while (buf.isReadable()) {
+                Position position = new Position(getProtocolName());
+                position.setDeviceId(deviceSession.getDeviceId());
+
+                short flags = buf.readUnsignedByte();
+
+                short event = buf.readUnsignedByte();
+                if (BitUtil.check(event, 7)) {
+                    if (BitUtil.check(event, 6)) {
+                        buf.skipBytes(8);
+                    } else {
+                        while (BitUtil.check(event, 7)) {
+                            event = buf.readUnsignedByte();
+                        }
+                    }
+                }
+
+                position.setLatitude(latitudeReader.readFloat(buf) / Math.PI * 180);
+                position.setLongitude(longitudeReader.readFloat(buf) / Math.PI * 180);
+                position.setTime(timeReader.readTime(buf));
+
+                if (BitUtil.check(flags, 0)) {
+                    buf.readUnsignedByte(); // status
+                }
+
+                if (BitUtil.check(flags, 1)) {
+                    position.setAltitude(buf.readUnsignedShort());
+                }
+
+                if (BitUtil.check(flags, 2)) {
+                    position.setSpeed(buf.readUnsignedShort() & 0x03ff);
+                    position.setCourse(buf.readUnsignedByte());
+                }
+
+                if (BitUtil.check(flags, 3)) {
+                    position.set(Position.KEY_ODOMETER, buf.readUnsignedShort() * 1000);
+                }
+
+                if (BitUtil.check(flags, 4)) {
+                    position.set(Position.KEY_FUEL_CONSUMPTION + "Accumulator1", buf.readUnsignedInt());
+                    position.set(Position.KEY_FUEL_CONSUMPTION + "Accumulator2", buf.readUnsignedInt());
+                    position.set("hours1", buf.readUnsignedShort());
+                    position.set("hours2", buf.readUnsignedShort());
+                }
+
+                if (BitUtil.check(flags, 5)) {
+                    position.set(Position.PREFIX_ADC + 1, buf.readUnsignedShort() & 0x03ff);
+                    position.set(Position.PREFIX_ADC + 2, buf.readUnsignedShort() & 0x03ff);
+                    position.set(Position.PREFIX_ADC + 3, buf.readUnsignedShort() & 0x03ff);
+                    position.set(Position.PREFIX_ADC + 4, buf.readUnsignedShort() & 0x03ff);
+                }
+
+                if (BitUtil.check(flags, 6)) {
+                    position.set(Position.PREFIX_TEMP + 1, buf.readByte());
+                    buf.getUnsignedByte(buf.readerIndex()); // control (>> 4)
+                    position.set(Position.KEY_INPUT, buf.readUnsignedShort() & 0x0fff);
+                    buf.readUnsignedShort(); // old sensor state (& 0x0fff)
+                }
+
+                if (BitUtil.check(flags, 7)) {
+                    position.set(Position.KEY_BATTERY, buf.getUnsignedByte(buf.readerIndex()) >> 2);
+                    position.set(Position.KEY_POWER, buf.readUnsignedShort() & 0x03ff);
+                    position.set(Position.KEY_DEVICE_TEMP, buf.readByte());
+
+                    position.set(Position.KEY_RSSI, (buf.getUnsignedByte(buf.readerIndex()) >> 4) & 0x07);
+
+                    int satellites = buf.readUnsignedByte() & 0x0f;
+                    position.setValid(satellites >= 3);
+                    position.set(Position.KEY_SATELLITES, satellites);
+                }
+                positions.add(position);
+            }
+        } catch (IndexOutOfBoundsException error) {
+            LOGGER.warn("MTA6 parsing error", error);
+        }
+
+        return positions;
+    }
+
+    private Position parseFormatA1(DeviceSession deviceSession, ByteBuf buf) {
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        short flags = buf.readUnsignedByte();
+
+        // Skip events
+        short event = buf.readUnsignedByte();
+        if (BitUtil.check(event, 7)) {
+            if (BitUtil.check(event, 6)) {
+                buf.skipBytes(8);
+            } else {
+                while (BitUtil.check(event, 7)) {
+                    event = buf.readUnsignedByte();
+                }
+            }
+        }
+
+        position.setLatitude(new FloatReader().readFloat(buf) / Math.PI * 180);
+        position.setLongitude(new FloatReader().readFloat(buf) / Math.PI * 180);
+        position.setTime(new TimeReader().readTime(buf));
+
+        position.set(Position.KEY_STATUS, buf.readUnsignedByte());
+
+        if (BitUtil.check(flags, 0)) {
+            position.setAltitude(buf.readUnsignedShort());
+            position.setSpeed(buf.readUnsignedByte());
+            position.setCourse(buf.readByte());
+            position.set(Position.KEY_ODOMETER, new FloatReader().readFloat(buf));
+        }
+
+        if (BitUtil.check(flags, 1)) {
+            position.set(Position.KEY_FUEL_CONSUMPTION, new FloatReader().readFloat(buf));
+            position.set(Position.KEY_HOURS, UnitsConverter.msFromHours(new FloatReader().readFloat(buf)));
+            position.set("tank", buf.readUnsignedByte() * 0.4);
+        }
+
+        if (BitUtil.check(flags, 2)) {
+            position.set("engine", buf.readUnsignedShort() * 0.125);
+            position.set("pedals", buf.readUnsignedByte());
+            position.set(Position.PREFIX_TEMP + 1, buf.readUnsignedByte() - 40);
+            position.set(Position.KEY_ODOMETER_SERVICE, buf.readUnsignedShort());
+        }
+
+        if (BitUtil.check(flags, 3)) {
+            position.set(Position.KEY_FUEL_LEVEL, buf.readUnsignedShort());
+            position.set(Position.PREFIX_ADC + 2, buf.readUnsignedShort());
+            position.set(Position.PREFIX_ADC + 3, buf.readUnsignedShort());
+            position.set(Position.PREFIX_ADC + 4, buf.readUnsignedShort());
+        }
+
+        if (BitUtil.check(flags, 4)) {
+            position.set(Position.PREFIX_TEMP + 1, buf.readByte());
+            buf.getUnsignedByte(buf.readerIndex()); // control (>> 4)
+            position.set(Position.KEY_INPUT, buf.readUnsignedShort() & 0x0fff);
+            buf.readUnsignedShort(); // old sensor state (& 0x0fff)
+        }
+
+        if (BitUtil.check(flags, 5)) {
+            position.set(Position.KEY_BATTERY, buf.getUnsignedByte(buf.readerIndex()) >> 2);
+            position.set(Position.KEY_POWER, buf.readUnsignedShort() & 0x03ff);
+            position.set(Position.KEY_DEVICE_TEMP, buf.readByte());
+
+            position.set(Position.KEY_RSSI, buf.getUnsignedByte(buf.readerIndex()) >> 5);
+
+            int satellites = buf.readUnsignedByte() & 0x1f;
+            position.setValid(satellites >= 3);
+            position.set(Position.KEY_SATELLITES, satellites);
+        }
+
+        // other data
+
+        return position;
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        FullHttpRequest request = (FullHttpRequest) msg;
+        ByteBuf buf = request.content();
+
+        buf.skipBytes("id=".length());
+        int index = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '&');
+        String uniqueId = buf.toString(buf.readerIndex(), index - buf.readerIndex(), StandardCharsets.US_ASCII);
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, uniqueId);
+        if (deviceSession == null) {
+            return null;
+        }
+        buf.skipBytes(uniqueId.length());
+        buf.skipBytes("&bin=".length());
+
+        short packetId = buf.readUnsignedByte();
+        short offset = buf.readUnsignedByte(); // dataOffset
+        short packetCount = buf.readUnsignedByte();
+        buf.readUnsignedByte(); // reserved
+        buf.readUnsignedByte(); // timezone
+        buf.skipBytes(offset - 5);
+
+        if (channel != null) {
+            sendContinue(channel);
+            sendResponse(channel, packetId, packetCount);
+        }
+
+        if (packetId == 0x31 || packetId == 0x32 || packetId == 0x36) {
+            if (simple) {
+                return parseFormatA1(deviceSession, buf);
+            } else {
+                return parseFormatA(deviceSession, buf);
+            }
+        } // else if (0x34 0x38 0x4F 0x59)
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/MtxProtocol.java b/src/main/java/org/traccar/protocol/MtxProtocol.java
new file mode 100644
index 000000000..44372ce83
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/MtxProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LineBasedFrameDecoder;
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class MtxProtocol extends BaseProtocol {
+
+    public MtxProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LineBasedFrameDecoder(1024));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new MtxProtocolDecoder(MtxProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/MtxProtocolDecoder.java b/src/main/java/org/traccar/protocol/MtxProtocolDecoder.java
new file mode 100644
index 000000000..d1207bedf
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/MtxProtocolDecoder.java
@@ -0,0 +1,98 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class MtxProtocolDecoder extends BaseProtocolDecoder {
+
+    public MtxProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("#MTX,")
+            .number("(d+),")                     // imei
+            .number("(dddd)(dd)(dd),")           // date (yyyymmdd)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .number("(-?d+.d+),")                // latitude
+            .number("(-?d+.d+),")                // longitude
+            .number("(d+.?d*),")                 // speed
+            .number("(d+),")                     // course
+            .number("(d+.?d*),")                 // odometer
+            .groupBegin()
+            .number("d+")
+            .or()
+            .text("X")
+            .groupEnd()
+            .text(",")
+            .expression("(?:[01]|X),")
+            .expression("([01]+),")              // input
+            .expression("([01]+),")              // output
+            .number("(d+),")                     // adc1
+            .number("(d+)")                      // adc2
+            .any()
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        if (channel != null) {
+            channel.writeAndFlush(new NetworkMessage("#ACK", remoteAddress));
+        }
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setTime(parser.nextDateTime());
+
+        position.setValid(true);
+        position.setLatitude(parser.nextDouble(0));
+        position.setLongitude(parser.nextDouble(0));
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
+
+        position.set(Position.KEY_ODOMETER, parser.nextDouble(0) * 1000);
+        position.set(Position.KEY_INPUT, parser.next());
+        position.set(Position.KEY_OUTPUT, parser.next());
+        position.set(Position.PREFIX_ADC + 1, parser.next());
+        position.set(Position.PREFIX_ADC + 2, parser.next());
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/MxtFrameDecoder.java b/src/main/java/org/traccar/protocol/MxtFrameDecoder.java
new file mode 100644
index 000000000..d70e92da1
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/MxtFrameDecoder.java
@@ -0,0 +1,53 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+import org.traccar.BaseFrameDecoder;
+
+public class MxtFrameDecoder extends BaseFrameDecoder {
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+        if (buf.readableBytes() < 2) {
+            return null;
+        }
+
+        int index = buf.indexOf(buf.readerIndex() + 1, buf.writerIndex(), (byte) 0x04);
+        if (index != -1) {
+            ByteBuf result = Unpooled.buffer(index + 1 - buf.readerIndex());
+
+            while (buf.readerIndex() <= index) {
+                int b = buf.readUnsignedByte();
+                if (b == 0x10) {
+                    result.writeByte(buf.readUnsignedByte() - 0x20);
+                } else {
+                    result.writeByte(b);
+                }
+            }
+
+            return result;
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/MxtProtocol.java b/src/main/java/org/traccar/protocol/MxtProtocol.java
new file mode 100644
index 000000000..dbe43fe45
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/MxtProtocol.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class MxtProtocol extends BaseProtocol {
+
+    public MxtProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                    pipeline.addLast(new MxtFrameDecoder());
+                    pipeline.addLast(new MxtProtocolDecoder(MxtProtocol.this));
+                }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/MxtProtocolDecoder.java b/src/main/java/org/traccar/protocol/MxtProtocolDecoder.java
new file mode 100644
index 000000000..7bde85f87
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/MxtProtocolDecoder.java
@@ -0,0 +1,175 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.Checksum;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+
+public class MxtProtocolDecoder extends BaseProtocolDecoder {
+
+    public MxtProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    public static final int MSG_ACK = 0x02;
+    public static final int MSG_NACK = 0x03;
+    public static final int MSG_POSITION = 0x31;
+
+    private static void sendResponse(Channel channel, int device, long id, int crc) {
+        if (channel != null) {
+            ByteBuf response = Unpooled.buffer();
+            response.writeByte(device);
+            response.writeByte(MSG_ACK);
+            response.writeIntLE((int) id);
+            response.writeShortLE(crc);
+            response.writeShortLE(Checksum.crc16(
+                    Checksum.CRC16_XMODEM, response.nioBuffer()));
+
+            ByteBuf encoded = Unpooled.buffer();
+            encoded.writeByte(0x01); // header
+            while (response.isReadable()) {
+                int b = response.readByte();
+                if (b == 0x01 || b == 0x04 || b == 0x10 || b == 0x11 || b == 0x13) {
+                    encoded.writeByte(0x10);
+                    b += 0x20;
+                }
+                encoded.writeByte(b);
+            }
+            response.release();
+            encoded.writeByte(0x04); // ending
+            channel.writeAndFlush(new NetworkMessage(encoded, channel.remoteAddress()));
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        buf.readUnsignedByte(); // start
+        int device = buf.readUnsignedByte(); // device descriptor
+        int type = buf.readUnsignedByte();
+
+        long id = buf.readUnsignedIntLE();
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, String.valueOf(id));
+        if (deviceSession == null) {
+            return null;
+        }
+
+        if (type == MSG_POSITION) {
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            buf.readUnsignedByte(); // protocol
+            int infoGroups = buf.readUnsignedByte();
+
+            position.set(Position.KEY_INDEX, buf.readUnsignedShortLE());
+
+            DateBuilder dateBuilder = new DateBuilder().setDate(2000, 1, 1);
+
+            long date = buf.readUnsignedIntLE();
+
+            long days = BitUtil.from(date, 6 + 6 + 5);
+            long hours = BitUtil.between(date, 6 + 6, 6 + 6 + 5);
+            long minutes = BitUtil.between(date, 6, 6 + 6);
+            long seconds = BitUtil.to(date, 6);
+
+            dateBuilder.addMillis((((days * 24 + hours) * 60 + minutes) * 60 + seconds) * 1000);
+
+            position.setTime(dateBuilder.getDate());
+
+            position.setValid(true);
+            position.setLatitude(buf.readIntLE() / 1000000.0);
+            position.setLongitude(buf.readIntLE() / 1000000.0);
+
+            long flags = buf.readUnsignedIntLE();
+            position.set(Position.KEY_IGNITION, BitUtil.check(flags, 0));
+            if (BitUtil.check(flags, 1)) {
+                position.set(Position.KEY_ALARM, Position.ALARM_GENERAL);
+            }
+            position.set(Position.KEY_INPUT, BitUtil.between(flags, 2, 7));
+            position.set(Position.KEY_OUTPUT, BitUtil.between(flags, 7, 10));
+            position.setCourse(BitUtil.between(flags, 10, 13) * 45);
+            // position.setValid(BitUtil.check(flags, 15));
+            position.set(Position.KEY_CHARGE, BitUtil.check(flags, 20));
+
+            position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte()));
+
+            buf.readUnsignedByte(); // input mask
+
+            if (BitUtil.check(infoGroups, 0)) {
+                buf.skipBytes(8); // waypoints
+            }
+
+            if (BitUtil.check(infoGroups, 1)) {
+                buf.skipBytes(8); // wireless accessory
+            }
+
+            if (BitUtil.check(infoGroups, 2)) {
+                position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
+                position.set(Position.KEY_HDOP, buf.readUnsignedByte());
+                position.setAccuracy(buf.readUnsignedByte());
+                position.set(Position.KEY_RSSI, buf.readUnsignedByte());
+                buf.readUnsignedShortLE(); // time since boot
+                position.set(Position.KEY_POWER, buf.readUnsignedByte());
+                position.set(Position.PREFIX_TEMP + 1, buf.readByte());
+            }
+
+            if (BitUtil.check(infoGroups, 3)) {
+                position.set(Position.KEY_ODOMETER, buf.readUnsignedIntLE());
+            }
+
+            if (BitUtil.check(infoGroups, 4)) {
+                position.set(Position.KEY_HOURS, UnitsConverter.msFromMinutes(buf.readUnsignedIntLE()));
+            }
+
+            if (BitUtil.check(infoGroups, 5)) {
+                buf.readUnsignedIntLE(); // reason
+            }
+
+            if (BitUtil.check(infoGroups, 6)) {
+                position.set(Position.KEY_POWER, buf.readUnsignedShortLE() * 0.001);
+                position.set(Position.KEY_BATTERY, buf.readUnsignedShortLE());
+            }
+
+            if (BitUtil.check(infoGroups, 7)) {
+                position.set(Position.KEY_DRIVER_UNIQUE_ID, String.valueOf(buf.readUnsignedIntLE()));
+            }
+
+            buf.readerIndex(buf.writerIndex() - 3);
+            sendResponse(channel, device, id, buf.readUnsignedShortLE());
+
+            return position;
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/NavigilFrameDecoder.java b/src/main/java/org/traccar/protocol/NavigilFrameDecoder.java
new file mode 100644
index 000000000..e8b6bea52
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/NavigilFrameDecoder.java
@@ -0,0 +1,56 @@
+/*
+ * Copyright 2013 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+import org.traccar.BaseFrameDecoder;
+
+public class NavigilFrameDecoder extends BaseFrameDecoder {
+
+    private static final int MESSAGE_HEADER = 20;
+    private static final long PREAMBLE = 0x2477F5F6;
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+        // Check minimum length
+        if (buf.readableBytes() < MESSAGE_HEADER) {
+            return null;
+        }
+
+        // Check for preamble
+        boolean hasPreamble = false;
+        if (buf.getUnsignedIntLE(buf.readerIndex()) == PREAMBLE) {
+            hasPreamble = true;
+        }
+
+        // Check length and return buffer
+        int length = buf.getUnsignedShortLE(buf.readerIndex() + 6);
+        if (buf.readableBytes() >= length) {
+            if (hasPreamble) {
+                buf.readUnsignedIntLE();
+                length -= 4;
+            }
+            return buf.readRetainedSlice(length);
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/NavigilProtocol.java b/src/main/java/org/traccar/protocol/NavigilProtocol.java
new file mode 100644
index 000000000..2c946c39f
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/NavigilProtocol.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class NavigilProtocol extends BaseProtocol {
+
+    public NavigilProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new NavigilFrameDecoder());
+                pipeline.addLast(new NavigilProtocolDecoder(NavigilProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/NavigilProtocolDecoder.java b/src/main/java/org/traccar/protocol/NavigilProtocolDecoder.java
new file mode 100644
index 000000000..db5521201
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/NavigilProtocolDecoder.java
@@ -0,0 +1,308 @@
+/*
+ * Copyright 2013 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.Checksum;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.Date;
+
+public class NavigilProtocolDecoder extends BaseProtocolDecoder {
+
+    public NavigilProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final int LEAP_SECONDS_DELTA = 25;
+
+    public static final int MSG_ERROR = 2;
+    public static final int MSG_INDICATION = 4;
+    public static final int MSG_CONN_OPEN = 5;
+    public static final int MSG_CONN_CLOSE = 6;
+    public static final int MSG_SYSTEM_REPORT = 7;
+    public static final int MSG_UNIT_REPORT = 8;
+    public static final int MSG_GEOFENCE_ALARM = 10;
+    public static final int MSG_INPUT_ALARM = 11;
+    public static final int MSG_TG2_REPORT = 12;
+    public static final int MSG_POSITION_REPORT = 13;
+    public static final int MSG_POSITION_REPORT_2 = 15;
+    public static final int MSG_SNAPSHOT4 = 17;
+    public static final int MSG_TRACKING_DATA = 18;
+    public static final int MSG_MOTION_ALARM = 19;
+    public static final int MSG_ACKNOWLEDGEMENT = 255;
+
+    private static Date convertTimestamp(long timestamp) {
+        return new Date((timestamp - LEAP_SECONDS_DELTA) * 1000);
+    }
+
+    private int senderSequenceNumber = 1;
+
+    private void sendAcknowledgment(Channel channel, int sequenceNumber) {
+        ByteBuf data = Unpooled.buffer(4);
+        data.writeShortLE(sequenceNumber);
+        data.writeShortLE(0); // OK
+
+        ByteBuf header = Unpooled.buffer(20);
+        header.writeByte(1); header.writeByte(0);
+        header.writeShortLE(senderSequenceNumber++);
+        header.writeShortLE(MSG_ACKNOWLEDGEMENT);
+        header.writeShortLE(header.capacity() + data.capacity());
+        header.writeShortLE(0);
+        header.writeShortLE(Checksum.crc16(Checksum.CRC16_CCITT_FALSE, data.nioBuffer()));
+        header.writeIntLE(0);
+        header.writeIntLE((int) (System.currentTimeMillis() / 1000) + LEAP_SECONDS_DELTA);
+
+        if (channel != null) {
+            channel.writeAndFlush(new NetworkMessage(Unpooled.wrappedBuffer(header, data), channel.remoteAddress()));
+        }
+    }
+
+    private Position parseUnitReport(
+            DeviceSession deviceSession, ByteBuf buf, int sequenceNumber) {
+        Position position = new Position(getProtocolName());
+
+        position.setValid(true);
+        position.set(Position.KEY_INDEX, sequenceNumber);
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        buf.readUnsignedShortLE(); // report trigger
+        position.set(Position.KEY_FLAGS, buf.readUnsignedShortLE());
+
+        position.setLatitude(buf.readIntLE() * 0.0000001);
+        position.setLongitude(buf.readIntLE() * 0.0000001);
+        position.setAltitude(buf.readUnsignedShortLE());
+
+        position.set(Position.KEY_SATELLITES, buf.readUnsignedShortLE());
+        position.set(Position.KEY_SATELLITES_VISIBLE, buf.readUnsignedShortLE());
+        position.set("gpsAntennaState", buf.readUnsignedShortLE());
+
+        position.setSpeed(buf.readUnsignedShortLE() * 0.194384);
+        position.setCourse(buf.readUnsignedShortLE());
+
+        position.set(Position.KEY_ODOMETER, buf.readUnsignedIntLE());
+        position.set(Position.KEY_DISTANCE, buf.readUnsignedIntLE());
+
+        position.set(Position.KEY_BATTERY, buf.readUnsignedShortLE() * 0.001);
+
+        position.set(Position.KEY_CHARGE, buf.readUnsignedShortLE());
+
+        position.setTime(convertTimestamp(buf.readUnsignedIntLE()));
+
+        return position;
+    }
+
+    private Position parseTg2Report(
+            DeviceSession deviceSession, ByteBuf buf, int sequenceNumber) {
+        Position position = new Position(getProtocolName());
+
+        position.setValid(true);
+        position.set(Position.KEY_INDEX, sequenceNumber);
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        buf.readUnsignedShortLE(); // report trigger
+        buf.readUnsignedByte(); // reserved
+        buf.readUnsignedByte(); // assisted GPS age
+
+        position.setTime(convertTimestamp(buf.readUnsignedIntLE()));
+
+        position.setLatitude(buf.readIntLE() * 0.0000001);
+        position.setLongitude(buf.readIntLE() * 0.0000001);
+        position.setAltitude(buf.readUnsignedShortLE());
+
+        position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
+        position.set(Position.KEY_SATELLITES_VISIBLE, buf.readUnsignedByte());
+
+        position.setSpeed(buf.readUnsignedShortLE() * 0.194384);
+        position.setCourse(buf.readUnsignedShortLE());
+
+        position.set(Position.KEY_ODOMETER, buf.readUnsignedIntLE());
+        position.set("maximumSpeed", buf.readUnsignedShortLE());
+        position.set("minimumSpeed", buf.readUnsignedShortLE());
+
+        position.set(Position.PREFIX_IO + 1, buf.readUnsignedShortLE()); // VSAUT1 voltage
+        position.set(Position.PREFIX_IO + 2, buf.readUnsignedShortLE()); // VSAUT2 voltage
+        position.set(Position.PREFIX_IO + 3, buf.readUnsignedShortLE()); // solar voltage
+
+        position.set(Position.KEY_BATTERY, buf.readUnsignedShortLE() * 0.001);
+
+        return position;
+    }
+
+    private Position parsePositionReport(
+            DeviceSession deviceSession, ByteBuf buf, int sequenceNumber, long timestamp) {
+        Position position = new Position(getProtocolName());
+
+        position.set(Position.KEY_INDEX, sequenceNumber);
+        position.setDeviceId(deviceSession.getDeviceId());
+        position.setTime(convertTimestamp(timestamp));
+
+        position.setLatitude(buf.readMediumLE() * 0.00002);
+        position.setLongitude(buf.readMediumLE() * 0.00002);
+
+        position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte()));
+        position.setCourse(buf.readUnsignedByte() * 2);
+
+        short flags = buf.readUnsignedByte();
+        position.setValid((flags & 0x80) == 0x80 && (flags & 0x40) == 0x40);
+
+        buf.readUnsignedByte(); // reserved
+
+        return position;
+    }
+
+    private Position parsePositionReport2(
+            DeviceSession deviceSession, ByteBuf buf, int sequenceNumber, long timestamp) {
+        Position position = new Position(getProtocolName());
+
+        position.set(Position.KEY_INDEX, sequenceNumber);
+        position.setDeviceId(deviceSession.getDeviceId());
+        position.setTime(convertTimestamp(timestamp));
+
+        position.setLatitude(buf.readIntLE() * 0.0000001);
+        position.setLongitude(buf.readIntLE() * 0.0000001);
+
+        buf.readUnsignedByte(); // report trigger
+
+        position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte()));
+
+        short flags = buf.readUnsignedByte();
+        position.setValid((flags & 0x80) == 0x80 && (flags & 0x40) == 0x40);
+
+        position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
+        position.set(Position.KEY_ODOMETER, buf.readUnsignedIntLE());
+
+        return position;
+    }
+
+    private Position parseSnapshot4(
+            DeviceSession deviceSession, ByteBuf buf, int sequenceNumber) {
+        Position position = new Position(getProtocolName());
+
+        position.set(Position.KEY_INDEX, sequenceNumber);
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        buf.readUnsignedByte(); // report trigger
+        buf.readUnsignedByte(); // position fix source
+        buf.readUnsignedByte(); // GNSS fix quality
+        buf.readUnsignedByte(); // GNSS assistance age
+
+        long flags = buf.readUnsignedIntLE();
+        position.setValid((flags & 0x0400) == 0x0400);
+
+        position.setTime(convertTimestamp(buf.readUnsignedIntLE()));
+
+        position.setLatitude(buf.readIntLE() * 0.0000001);
+        position.setLongitude(buf.readIntLE() * 0.0000001);
+        position.setAltitude(buf.readUnsignedShortLE());
+
+        position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
+        position.set(Position.KEY_SATELLITES_VISIBLE, buf.readUnsignedByte());
+
+        position.setSpeed(buf.readUnsignedShortLE() * 0.194384);
+        position.setCourse(buf.readUnsignedShortLE() * 0.1);
+
+        position.set("maximumSpeed", buf.readUnsignedByte());
+        position.set("minimumSpeed", buf.readUnsignedByte());
+        position.set(Position.KEY_ODOMETER, buf.readUnsignedIntLE());
+
+        position.set(Position.PREFIX_IO + 1, buf.readUnsignedByte()); // supply voltage 1
+        position.set(Position.PREFIX_IO + 2, buf.readUnsignedByte()); // supply voltage 2
+        position.set(Position.KEY_BATTERY, buf.readUnsignedShortLE() * 0.001);
+
+        return position;
+    }
+
+    private Position parseTrackingData(
+            DeviceSession deviceSession, ByteBuf buf, int sequenceNumber, long timestamp) {
+        Position position = new Position(getProtocolName());
+
+        position.set(Position.KEY_INDEX, sequenceNumber);
+        position.setDeviceId(deviceSession.getDeviceId());
+        position.setTime(convertTimestamp(timestamp));
+
+        buf.readUnsignedByte(); // tracking mode
+
+        short flags = buf.readUnsignedByte();
+        position.setValid((flags & 0x01) == 0x01);
+
+        buf.readUnsignedShortLE(); // duration
+
+        position.setLatitude(buf.readIntLE() * 0.0000001);
+        position.setLongitude(buf.readIntLE() * 0.0000001);
+
+        position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte()));
+        position.setCourse(buf.readUnsignedByte() * 2.0);
+
+        position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
+        position.set(Position.KEY_BATTERY, buf.readUnsignedShortLE() * 0.001);
+        position.set(Position.KEY_ODOMETER, buf.readUnsignedIntLE());
+
+        return position;
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        buf.readUnsignedByte(); // protocol version
+        buf.readUnsignedByte(); // version id
+        int sequenceNumber = buf.readUnsignedShortLE();
+        int messageId = buf.readUnsignedShortLE();
+        buf.readUnsignedShortLE(); // length
+        int flags = buf.readUnsignedShortLE();
+        buf.readUnsignedShortLE(); // checksum
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, String.valueOf(buf.readUnsignedIntLE()));
+        if (deviceSession == null) {
+            return null;
+        }
+
+        long timestamp = buf.readUnsignedIntLE();
+
+        if ((flags & 0x1) == 0x0) {
+            sendAcknowledgment(channel, sequenceNumber);
+        }
+
+        switch (messageId) {
+            case MSG_UNIT_REPORT:
+                return parseUnitReport(deviceSession, buf, sequenceNumber);
+            case MSG_TG2_REPORT:
+                return parseTg2Report(deviceSession, buf, sequenceNumber);
+            case MSG_POSITION_REPORT:
+                return parsePositionReport(deviceSession, buf, sequenceNumber, timestamp);
+            case MSG_POSITION_REPORT_2:
+                return parsePositionReport2(deviceSession, buf, sequenceNumber, timestamp);
+            case MSG_SNAPSHOT4:
+                return parseSnapshot4(deviceSession, buf, sequenceNumber);
+            case MSG_TRACKING_DATA:
+                return parseTrackingData(deviceSession, buf, sequenceNumber, timestamp);
+            default:
+                return null;
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/NavisFrameDecoder.java b/src/main/java/org/traccar/protocol/NavisFrameDecoder.java
new file mode 100644
index 000000000..8a0bb0b9a
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/NavisFrameDecoder.java
@@ -0,0 +1,109 @@
+/*
+ * Copyright 2019 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+import java.nio.charset.StandardCharsets;
+import org.traccar.BaseFrameDecoder;
+import org.traccar.BasePipelineFactory;
+
+public class NavisFrameDecoder extends BaseFrameDecoder {
+
+    private static final int NTCB_HEADER_LENGTH = 16;
+    private static final int NTCB_LENGTH_OFFSET = 12;
+    private static final int FLEX_HEADER_LENGTH = 2;
+
+    private int flexDataSize;
+
+    public void setFlexDataSize(int flexDataSize) {
+        this.flexDataSize = flexDataSize;
+    }
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+        if (buf.getByte(buf.readerIndex()) == 0x7F) {
+            return buf.readRetainedSlice(1); // keep alive
+        }
+
+        if (ctx != null && flexDataSize == 0) {
+            NavisProtocolDecoder protocolDecoder =
+                    BasePipelineFactory.getHandler(ctx.pipeline(), NavisProtocolDecoder.class);
+            if (protocolDecoder != null) {
+                flexDataSize = protocolDecoder.getFlexDataSize();
+            }
+        }
+
+        if (flexDataSize > 0) {
+
+            if (buf.readableBytes() > FLEX_HEADER_LENGTH) {
+                int length = 0;
+                String type = buf.toString(buf.readerIndex(), 2, StandardCharsets.US_ASCII);
+                switch (type) {
+                    // FLEX 1.0
+                    case "~A":
+                        length = flexDataSize  * buf.getByte(buf.readerIndex() + FLEX_HEADER_LENGTH) + 1 + 1;
+                        break;
+                    case "~T":
+                        length = flexDataSize + 4 + 1;
+                        break;
+                    case "~C":
+                        length = flexDataSize + 1;
+                        break;
+                    // FLEX 2.0 (Extra packages)
+                    case "~E":
+                        length++;
+                        for (int i = 0; i < buf.getByte(buf.readerIndex() + FLEX_HEADER_LENGTH); i++) {
+                            if (buf.readableBytes() > FLEX_HEADER_LENGTH + length + 1) {
+                                length += buf.getUnsignedShort(length + FLEX_HEADER_LENGTH) + 2;
+                            } else {
+                                return null;
+                            }
+                        }
+                        length++;
+                        break;
+                    case "~X":
+                        length = buf.getUnsignedShortLE(buf.readerIndex() + FLEX_HEADER_LENGTH) + 4 + 1;
+                        break;
+                    default:
+                        return null;
+                }
+
+                if (buf.readableBytes() >= FLEX_HEADER_LENGTH + length) {
+                    return buf.readRetainedSlice(buf.readableBytes());
+                }
+            }
+
+        } else {
+
+            if (buf.readableBytes() < NTCB_HEADER_LENGTH) {
+                return null;
+            }
+
+            int length = NTCB_HEADER_LENGTH + buf.getUnsignedShortLE(buf.readerIndex() + NTCB_LENGTH_OFFSET);
+            if (buf.readableBytes() >= length) {
+                return buf.readRetainedSlice(length);
+            }
+
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/NavisProtocol.java b/src/main/java/org/traccar/protocol/NavisProtocol.java
new file mode 100644
index 000000000..d5af6838d
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/NavisProtocol.java
@@ -0,0 +1,33 @@
+/*
+ * Copyright 2015 - 2019 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class NavisProtocol extends BaseProtocol {
+
+    public NavisProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new NavisFrameDecoder());
+                pipeline.addLast(new NavisProtocolDecoder(NavisProtocol.this));
+            }
+        });
+    }
+}
diff --git a/src/main/java/org/traccar/protocol/NavisProtocolDecoder.java b/src/main/java/org/traccar/protocol/NavisProtocolDecoder.java
new file mode 100644
index 000000000..7ba474ae0
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/NavisProtocolDecoder.java
@@ -0,0 +1,683 @@
+/*
+ * Copyright 2012 - 2019 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.Checksum;
+import org.traccar.helper.Checksum.Algorithm;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Date;
+
+public class NavisProtocolDecoder extends BaseProtocolDecoder {
+
+    private static final int[] FLEX_FIELDS_SIZES = {
+            4, 2, 4, 1, 1, 1, 1, 1, 4, 4, 4, 4, 4, 2, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 4, 4, 2, 2,
+            4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 2, 4, 2, 1, 4, 2, 2, 2, 2, 2, 1, 1, 1, 2, 4, 2, 1,
+            /* FLEX 2.0 */
+            8, 2, 1, 16, 4, 2, 4, 37, 1, 1, 1, 1, 1, 1, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 6, 12, 24, 48, 1, 1, 1, 1, 4, 4,
+            1, 4, 2, 6, 2, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 1
+    };
+
+    private String prefix;
+    private long deviceUniqueId, serverId;
+    private int flexDataSize;
+    private int flexBitFieldSize;
+    private final byte[] flexBitField = new byte[16];
+
+    public NavisProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    public static final int F10 = 0x01;
+    public static final int F20 = 0x02;
+    public static final int F30 = 0x03;
+    public static final int F40 = 0x04;
+    public static final int F50 = 0x05;
+    public static final int F51 = 0x15;
+    public static final int F52 = 0x25;
+    public static final int F60 = 0x06;
+
+    public int getFlexDataSize() {
+        return flexDataSize;
+    }
+
+    private static boolean isFormat(int type, int... types) {
+        for (int i : types) {
+            if (type == i) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    private Position parseNtcbPosition(DeviceSession deviceSession, ByteBuf buf) {
+        Position position = new Position(getProtocolName());
+
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        int format;
+        if (buf.getUnsignedByte(buf.readerIndex()) == 0) {
+            format = buf.readUnsignedShortLE();
+        } else {
+            format = buf.readUnsignedByte();
+        }
+        position.set("format", format);
+
+        position.set(Position.KEY_INDEX, buf.readUnsignedIntLE());
+        position.set(Position.KEY_EVENT, buf.readUnsignedShortLE());
+
+        buf.skipBytes(6); // event time
+
+        short armedStatus = buf.readUnsignedByte();
+        if (isFormat(format, F10, F20, F30, F40, F50, F51, F52)) {
+            position.set(Position.KEY_ARMED, BitUtil.to(armedStatus, 7));
+            if (BitUtil.check(armedStatus, 7)) {
+                position.set(Position.KEY_ALARM, Position.ALARM_GENERAL);
+            }
+        } else if (isFormat(format, F60)) {
+            position.set(Position.KEY_ARMED, BitUtil.check(armedStatus, 0));
+            if (BitUtil.check(armedStatus, 1)) {
+                position.set(Position.KEY_ALARM, Position.ALARM_GENERAL);
+            }
+        }
+
+        position.set(Position.KEY_STATUS, buf.readUnsignedByte());
+        position.set(Position.KEY_RSSI, buf.readUnsignedByte());
+
+        if (isFormat(format, F10, F20, F30)) {
+            int output = buf.readUnsignedShortLE();
+            position.set(Position.KEY_OUTPUT, output);
+            for (int i = 0; i < 16; i++) {
+                position.set(Position.PREFIX_OUT + (i + 1), BitUtil.check(output, i));
+            }
+        } else if (isFormat(format, F50, F51, F52)) {
+            short extField = buf.readUnsignedByte();
+            position.set(Position.KEY_OUTPUT, BitUtil.to(extField, 2));
+            position.set(Position.PREFIX_OUT + 1, BitUtil.check(extField, 0));
+            position.set(Position.PREFIX_OUT + 2, BitUtil.check(extField, 1));
+            position.set(Position.KEY_SATELLITES, BitUtil.from(extField, 2));
+        } else if (isFormat(format, F40, F60)) {
+            short output = buf.readUnsignedByte();
+            position.set(Position.KEY_OUTPUT, BitUtil.to(output, 4));
+            for (int i = 0; i < 4; i++) {
+                position.set(Position.PREFIX_OUT + (i + 1), BitUtil.check(output, i));
+            }
+        }
+
+        if (isFormat(format, F10, F20, F30, F40)) {
+            int input = buf.readUnsignedShortLE();
+            position.set(Position.KEY_INPUT, input);
+            if (!isFormat(format, F40)) {
+                for (int i = 0; i < 16; i++) {
+                    position.set(Position.PREFIX_IN + (i + 1), BitUtil.check(input, i));
+                }
+            } else {
+                position.set(Position.PREFIX_IN + 1, BitUtil.check(input, 0));
+                position.set(Position.PREFIX_IN + 2, BitUtil.check(input, 1));
+                position.set(Position.PREFIX_IN + 3, BitUtil.check(input, 2));
+                position.set(Position.PREFIX_IN + 4, BitUtil.check(input, 3));
+                position.set(Position.PREFIX_IN + 5, BitUtil.between(input, 4, 7));
+                position.set(Position.PREFIX_IN + 6, BitUtil.between(input, 7, 10));
+                position.set(Position.PREFIX_IN + 7, BitUtil.between(input, 10, 12));
+                position.set(Position.PREFIX_IN + 8, BitUtil.between(input, 12, 14));
+            }
+        } else if (isFormat(format, F50, F51, F52, F60)) {
+            short input = buf.readUnsignedByte();
+            position.set(Position.KEY_INPUT, input);
+            for (int i = 0; i < 8; i++) {
+                position.set(Position.PREFIX_IN + (i + 1), BitUtil.check(input, i));
+            }
+        }
+
+        position.set(Position.KEY_POWER, buf.readUnsignedShortLE() * 0.001);
+        position.set(Position.KEY_BATTERY, buf.readUnsignedShortLE() * 0.001);
+
+        if (isFormat(format, F10, F20, F30)) {
+            position.set(Position.PREFIX_TEMP + 1, buf.readShortLE());
+        }
+
+        if (isFormat(format, F10, F20, F50, F51, F52, F60)) {
+            position.set(Position.PREFIX_ADC + 1, buf.readUnsignedShortLE());
+            position.set(Position.PREFIX_ADC + 2, buf.readUnsignedShortLE());
+        }
+        if (isFormat(format, F60)) {
+            position.set(Position.PREFIX_ADC + 3, buf.readUnsignedShortLE());
+        }
+
+        // Impulse counters
+        if (isFormat(format, F20, F50, F51, F52, F60)) {
+            buf.readUnsignedIntLE();
+            buf.readUnsignedIntLE();
+        }
+
+        if (isFormat(format, F60)) {
+            // Fuel
+            buf.readUnsignedShortLE();
+            buf.readUnsignedShortLE();
+            buf.readByte();
+            buf.readShortLE();
+            buf.readByte();
+            buf.readUnsignedShortLE();
+            buf.readByte();
+            buf.readUnsignedShortLE();
+            buf.readByte();
+            buf.readUnsignedShortLE();
+            buf.readByte();
+            buf.readUnsignedShortLE();
+            buf.readByte();
+            buf.readUnsignedShortLE();
+            buf.readByte();
+            buf.readUnsignedShortLE();
+            buf.readByte();
+            buf.readUnsignedShortLE();
+
+            position.set(Position.PREFIX_TEMP + 1, buf.readByte());
+            position.set(Position.PREFIX_TEMP + 2, buf.readByte());
+            position.set(Position.PREFIX_TEMP + 3, buf.readByte());
+            position.set(Position.PREFIX_TEMP + 4, buf.readByte());
+            position.set(Position.KEY_AXLE_WEIGHT, buf.readIntLE());
+            position.set(Position.KEY_RPM, buf.readUnsignedShortLE());
+        }
+
+        if (isFormat(format, F20, F50, F51, F52, F60)) {
+            int navSensorState = buf.readUnsignedByte();
+            position.setValid(BitUtil.check(navSensorState, 1));
+            if (isFormat(format, F60)) {
+                position.set(Position.KEY_SATELLITES, BitUtil.from(navSensorState, 2));
+            }
+
+            DateBuilder dateBuilder = new DateBuilder()
+                    .setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte())
+                    .setDateReverse(buf.readUnsignedByte(), buf.readUnsignedByte() + 1, buf.readUnsignedByte());
+            position.setTime(dateBuilder.getDate());
+
+            if (isFormat(format, F60)) {
+                position.setLatitude(buf.readIntLE() / 600000.0);
+                position.setLongitude(buf.readIntLE() / 600000.0);
+                position.setAltitude(buf.readIntLE() * 0.1);
+            } else {
+                position.setLatitude(buf.readFloatLE() / Math.PI * 180);
+                position.setLongitude(buf.readFloatLE() / Math.PI * 180);
+            }
+
+            position.setSpeed(UnitsConverter.knotsFromKph(buf.readFloatLE()));
+            position.setCourse(buf.readUnsignedShortLE());
+
+            position.set(Position.KEY_ODOMETER, buf.readFloatLE() * 1000);
+            position.set(Position.KEY_DISTANCE, buf.readFloatLE() * 1000);
+
+            // Segment times
+            buf.readUnsignedShortLE();
+            buf.readUnsignedShortLE();
+        }
+
+        // Other
+        if (isFormat(format, F51, F52)) {
+            buf.readUnsignedShortLE();
+            buf.readByte();
+            buf.readUnsignedShortLE();
+            buf.readUnsignedShortLE();
+            buf.readByte();
+            buf.readUnsignedShortLE();
+            buf.readUnsignedShortLE();
+            buf.readByte();
+            buf.readUnsignedShortLE();
+        }
+
+        // Four temperature sensors
+        if (isFormat(format, F40, F52)) {
+            position.set(Position.PREFIX_TEMP + 1, buf.readByte());
+            position.set(Position.PREFIX_TEMP + 2, buf.readByte());
+            position.set(Position.PREFIX_TEMP + 3, buf.readByte());
+            position.set(Position.PREFIX_TEMP + 4, buf.readByte());
+        }
+
+        return position;
+    }
+
+    private Object processNtcbSingle(DeviceSession deviceSession, Channel channel, ByteBuf buf) {
+        Position position = parseNtcbPosition(deviceSession, buf);
+
+        ByteBuf response = Unpooled.buffer(7);
+        response.writeCharSequence("*<T", StandardCharsets.US_ASCII);
+        response.writeIntLE((int) position.getLong(Position.KEY_INDEX));
+        sendNtcbReply(channel, response);
+
+        return position.getFixTime() != null ? position : null;
+    }
+
+    private Object processNtcbArray(DeviceSession deviceSession, Channel channel, ByteBuf buf) {
+        List<Position> positions = new LinkedList<>();
+        int count = buf.readUnsignedByte();
+
+        for (int i = 0; i < count; i++) {
+            Position position = parseNtcbPosition(deviceSession, buf);
+            if (position.getFixTime() != null) {
+                positions.add(position);
+            }
+        }
+
+        ByteBuf response = Unpooled.buffer(7);
+        response.writeCharSequence("*<A", StandardCharsets.US_ASCII);
+        response.writeByte(count);
+        sendNtcbReply(channel, response);
+
+        if (positions.isEmpty()) {
+            return null;
+        }
+
+        return positions;
+    }
+
+    private boolean checkFlexBitfield(int index) {
+        int byteIndex = Math.floorDiv(index, 8);
+        int bitIndex = Math.floorMod(index, 8);
+        return BitUtil.check(flexBitField[byteIndex], 7 - bitIndex);
+    }
+
+    private Position parseFlexPosition(DeviceSession deviceSession, ByteBuf buf) {
+
+        Position position = new Position(getProtocolName());
+
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        int status = 0;
+        short input = 0;
+        short output = 0;
+
+        for (int i = 0; i < flexBitFieldSize; i++) {
+            if (!checkFlexBitfield(i)) {
+                continue;
+            }
+
+            switch (i) {
+                case 0:
+                    position.set(Position.KEY_INDEX, buf.readUnsignedIntLE());
+                    break;
+                case 1:
+                    position.set(Position.KEY_EVENT, buf.readUnsignedShortLE());
+                    break;
+                case 3:
+                    short armedStatus = buf.readUnsignedByte();
+                    position.set(Position.KEY_ARMED, BitUtil.check(armedStatus, 0));
+                    if (BitUtil.check(armedStatus, 1)) {
+                        position.set(Position.KEY_ALARM, Position.ALARM_GENERAL);
+                    }
+                    break;
+                case 4:
+                    status = buf.readUnsignedByte();
+                    position.set(Position.KEY_STATUS, status);
+                    break;
+                case 5:
+                    int status2 = buf.readUnsignedByte();
+                    position.set(Position.KEY_STATUS, (short) (BitUtil.to(status, 8) | (status2 << 8)));
+                    break;
+                case 6:
+                    position.set(Position.KEY_RSSI, buf.readUnsignedByte());
+                    break;
+                case 7:
+                    int navSensorState = buf.readUnsignedByte();
+                    position.setValid(BitUtil.check(navSensorState, 1));
+                    position.set(Position.KEY_SATELLITES, BitUtil.from(navSensorState, 2));
+                    break;
+                case 8:
+                     position.setTime(new DateBuilder(new Date(buf.readUnsignedIntLE() * 1000)).getDate());
+                    break;
+                case 9:
+                    position.setLatitude(buf.readIntLE() / 600000.0);
+                    break;
+                case 10:
+                    position.setLongitude(buf.readIntLE() / 600000.0);
+                    break;
+                case 11:
+                    position.setAltitude(buf.readIntLE() * 0.1);
+                    break;
+                case 12:
+                    position.setSpeed(UnitsConverter.knotsFromKph(buf.readFloatLE()));
+                    break;
+                case 13:
+                    position.setCourse(buf.readUnsignedShortLE());
+                    break;
+                case 14:
+                    position.set(Position.KEY_ODOMETER, buf.readFloatLE() * 1000);
+                    break;
+                case 15:
+                    position.set(Position.KEY_DISTANCE, buf.readFloatLE() * 1000);
+                    break;
+                case 18:
+                    position.set(Position.KEY_POWER, buf.readUnsignedShortLE() * 0.001);
+                    break;
+                case 19:
+                    position.set(Position.KEY_BATTERY, buf.readUnsignedShortLE() * 0.001);
+                    break;
+                case 20:
+                case 21:
+                case 22:
+                case 23:
+                case 24:
+                case 25:
+                case 26:
+                case 27:
+                    position.set(Position.PREFIX_ADC + (i - 19), buf.readUnsignedShortLE());
+                    break;
+                case 28:
+                    input = buf.readUnsignedByte();
+                    position.set(Position.KEY_INPUT, input);
+                    for (int k = 0; k < 8; k++) {
+                        position.set(Position.PREFIX_IN + (k + 1), BitUtil.check(input, k));
+                    }
+                    break;
+                case 29:
+                    short input2 = buf.readUnsignedByte();
+                    position.set(Position.KEY_INPUT, (short) (BitUtil.to(input, 8) | (input2 << 8)));
+                    for (int k = 0; k < 8; k++) {
+                        position.set(Position.PREFIX_IN + (k + 9), BitUtil.check(input2, k));
+                    }
+                    break;
+                case 30:
+                    output = buf.readUnsignedByte();
+                    position.set(Position.KEY_OUTPUT, output);
+                    for (int k = 0; k < 8; k++) {
+                        position.set(Position.PREFIX_OUT + (k + 1), BitUtil.check(output, k));
+                    }
+                    break;
+                case 31:
+                    short output2 = buf.readUnsignedByte();
+                    position.set(Position.KEY_OUTPUT, (short) (BitUtil.to(output, 8) | (output2 << 8)));
+                    for (int k = 0; k < 8; k++) {
+                        position.set(Position.PREFIX_OUT + (k + 9), BitUtil.check(output2, k));
+                    }
+                    break;
+                case 36:
+                    position.set(Position.KEY_HOURS, buf.readUnsignedIntLE() * 1000);
+                    break;
+                case 44:
+                case 45:
+                case 46:
+                case 47:
+                case 48:
+                case 49:
+                case 50:
+                case 51:
+                    position.set(Position.PREFIX_TEMP + (i - 43), buf.readByte());
+                    break;
+                case 68:
+                    position.set("can-speed", buf.readUnsignedByte());
+                    break;
+                // FLEX 2.0
+                case 69:
+                    int satVisible = 0;
+                    for (int k = 0; k < 8; k++) {
+                        satVisible += buf.readUnsignedByte();
+                    }
+                    position.set(Position.KEY_SATELLITES_VISIBLE, satVisible);
+                    break;
+                case 70:
+                    position.set(Position.KEY_HDOP, buf.readUnsignedByte() * 0.1);
+                    position.set(Position.KEY_PDOP, buf.readUnsignedByte() * 0.1);
+                    break;
+                default:
+                    if (i < FLEX_FIELDS_SIZES.length) {
+                        buf.skipBytes(FLEX_FIELDS_SIZES[i]);
+                    }
+                    break;
+            }
+        }
+
+        return position;
+    }
+
+    private Position parseFlex20Position(DeviceSession deviceSession, ByteBuf buf) {
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        int length = buf.readUnsignedShort();
+        if (length <= buf.readableBytes() && buf.readUnsignedByte() == 0x0A) {
+
+            buf.readUnsignedByte(); // length of static part
+
+            position.set(Position.KEY_INDEX, buf.readUnsignedIntLE());
+
+            position.set(Position.KEY_EVENT, buf.readUnsignedShortLE());
+            buf.readUnsignedInt(); // event time
+
+            int navSensorState = buf.readUnsignedByte();
+            position.setValid(BitUtil.check(navSensorState, 1));
+            position.set(Position.KEY_SATELLITES, BitUtil.from(navSensorState, 2));
+
+            position.setTime(new DateBuilder(new Date(buf.readUnsignedIntLE() * 1000)).getDate());
+            position.setLatitude(buf.readIntLE() / 600000.0);
+            position.setLongitude(buf.readIntLE() / 600000.0);
+            position.setAltitude(buf.readIntLE() * 0.1);
+            position.setSpeed(UnitsConverter.knotsFromKph(buf.readFloatLE()));
+            position.setCourse(buf.readUnsignedShortLE());
+            position.set(Position.KEY_ODOMETER, buf.readFloatLE() * 1000);
+
+            buf.skipBytes(length - buf.readerIndex() - 1); // skip unused part
+        }
+
+        return position;
+    }
+
+    private interface FlexPositionParser {
+        Position parsePosition(DeviceSession deviceSession, ByteBuf buf);
+    }
+
+    private Object processFlexSingle(
+            FlexPositionParser parser, String flexHeader, DeviceSession deviceSession, Channel channel, ByteBuf buf) {
+
+        if (!flexHeader.equals("~C")) {
+            buf.readUnsignedInt(); // event index
+        }
+
+        Position position = parser.parsePosition(deviceSession, buf);
+
+        ByteBuf response = Unpooled.buffer();
+        response.writeCharSequence(flexHeader, StandardCharsets.US_ASCII);
+        response.writeIntLE((int) position.getLong(Position.KEY_INDEX));
+        sendFlexReply(channel, response);
+
+        return position.getFixTime() != null ? position : null;
+    }
+
+    private Object processFlexArray(
+            FlexPositionParser parser, String flexHeader, DeviceSession deviceSession, Channel channel, ByteBuf buf) {
+
+        List<Position> positions = new LinkedList<>();
+        int count = buf.readUnsignedByte();
+
+        for (int i = 0; i < count; i++) {
+            Position position = parser.parsePosition(deviceSession, buf);
+            if (position.getFixTime() != null) {
+                positions.add(position);
+            }
+        }
+
+        ByteBuf response = Unpooled.buffer();
+        response.writeCharSequence(flexHeader, StandardCharsets.US_ASCII);
+        response.writeByte(count);
+        sendFlexReply(channel, response);
+
+        return !positions.isEmpty() ? positions : null;
+    }
+
+    private Object processFlexNegotiation(Channel channel, ByteBuf buf) {
+        if ((byte) buf.readUnsignedByte() != (byte) 0xB0) {
+            return null;
+        }
+
+        short flexProtocolVersion = buf.readUnsignedByte();
+        short flexStructVersion = buf.readUnsignedByte();
+        if ((flexProtocolVersion == 0x0A || flexProtocolVersion == 0x14)
+            && (flexStructVersion == 0x0A || flexStructVersion == 0x14)) {
+
+            flexBitFieldSize = buf.readUnsignedByte();
+            if (flexBitFieldSize > 122) {
+                return null;
+            }
+
+            buf.readBytes(flexBitField, 0, (int) Math.ceil((double) flexBitFieldSize / 8));
+
+            flexDataSize = 0;
+            for (int i = 0; i < flexBitFieldSize; i++) {
+                if (checkFlexBitfield(i)) {
+                    flexDataSize += FLEX_FIELDS_SIZES[i];
+                }
+            }
+        } else {
+            flexProtocolVersion = 0x14;
+            flexStructVersion = 0x14;
+        }
+
+        ByteBuf response = Unpooled.buffer(9);
+        response.writeCharSequence("*<FLEX", StandardCharsets.US_ASCII);
+        response.writeByte(0xB0);
+        response.writeByte(flexProtocolVersion);
+        response.writeByte(flexStructVersion);
+        sendNtcbReply(channel, response);
+
+        return null;
+    }
+
+    private Object processHandshake(Channel channel, SocketAddress remoteAddress, ByteBuf buf) {
+        buf.readByte(); // colon
+        if (getDeviceSession(channel, remoteAddress, buf.toString(StandardCharsets.US_ASCII)) != null) {
+            sendNtcbReply(channel, Unpooled.copiedBuffer("*<S", StandardCharsets.US_ASCII));
+        }
+        return null;
+    }
+
+    private void sendNtcbReply(Channel channel, ByteBuf data) {
+        if (channel != null) {
+            ByteBuf header = Unpooled.buffer(16);
+            header.writeCharSequence(prefix, StandardCharsets.US_ASCII);
+            header.writeIntLE((int) deviceUniqueId);
+            header.writeIntLE((int) serverId);
+            header.writeShortLE(data.readableBytes());
+            header.writeByte(Checksum.xor(data.nioBuffer()));
+            header.writeByte(Checksum.xor(header.nioBuffer()));
+
+            channel.writeAndFlush(new NetworkMessage(Unpooled.wrappedBuffer(header, data), channel.remoteAddress()));
+        }
+    }
+
+    private void sendFlexReply(Channel channel, ByteBuf data) {
+        if (channel != null) {
+            ByteBuf cs = Unpooled.buffer(1);
+            cs.writeByte(Checksum.crc8(new Algorithm(8, 0x31, 0xFF, false, false, 0x00), data.nioBuffer()));
+
+            channel.writeAndFlush(new NetworkMessage(Unpooled.wrappedBuffer(data, cs), channel.remoteAddress()));
+        }
+    }
+
+    private Object decodeNtcb(Channel channel, SocketAddress remoteAddress, ByteBuf buf) {
+
+        prefix = buf.toString(buf.readerIndex(), 4, StandardCharsets.US_ASCII);
+        buf.skipBytes(prefix.length()); // prefix @NTC by default
+        serverId = buf.readUnsignedIntLE();
+        deviceUniqueId = buf.readUnsignedIntLE();
+        int length = buf.readUnsignedShortLE();
+        buf.skipBytes(2); // header and data XOR checksum
+
+        if (length == 0) {
+            return null; // keep alive message
+        }
+
+        String type = buf.toString(buf.readerIndex(), 3, StandardCharsets.US_ASCII);
+        buf.skipBytes(type.length());
+
+        if (type.equals("*>S")) {
+            return processHandshake(channel, remoteAddress, buf);
+        } else {
+            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+            if (deviceSession != null) {
+                switch (type) {
+                    case "*>A":
+                        return processNtcbArray(deviceSession, channel, buf);
+                    case "*>T":
+                        return processNtcbSingle(deviceSession, channel, buf);
+                    case "*>F":
+                        buf.skipBytes(3);
+                        return processFlexNegotiation(channel, buf);
+                    default:
+                        break;
+                }
+            }
+        }
+
+        return null;
+    }
+
+    private Object decodeFlex(Channel channel, SocketAddress remoteAddress, ByteBuf buf) {
+
+        if (buf.getByte(buf.readerIndex()) == 0x7F) {
+            return null; // keep alive
+        }
+
+        String type = buf.toString(buf.readerIndex(), 2, StandardCharsets.US_ASCII);
+        buf.skipBytes(type.length());
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+        if (deviceSession != null) {
+            switch (type) {
+                // FLEX 1.0
+                case "~A":
+                    return processFlexArray(this::parseFlexPosition, type, deviceSession, channel, buf);
+                case "~T":
+                case "~C":
+                    return processFlexSingle(this::parseFlexPosition, type, deviceSession, channel, buf);
+                // FLEX 2.0 (extra packages)
+                case "~E":
+                    return processFlexArray(this::parseFlex20Position, type, deviceSession, channel, buf);
+                case "~X":
+                    return processFlexSingle(this::parseFlex20Position, type, deviceSession, channel, buf);
+                default:
+                    break;
+            }
+        }
+
+        return null;
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        if (flexDataSize > 0) {
+            return decodeFlex(channel, remoteAddress, buf);
+        } else {
+            return decodeNtcb(channel, remoteAddress, buf);
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/NeosProtocol.java b/src/main/java/org/traccar/protocol/NeosProtocol.java
new file mode 100644
index 000000000..e545a9969
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/NeosProtocol.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2019 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class NeosProtocol extends BaseProtocol {
+
+    public NeosProtocol() {
+        addServer(new TrackerServer(true, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new NeosProtocolDecoder(NeosProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/NeosProtocolDecoder.java b/src/main/java/org/traccar/protocol/NeosProtocolDecoder.java
new file mode 100644
index 000000000..6b5596dba
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/NeosProtocolDecoder.java
@@ -0,0 +1,98 @@
+/*
+ * Copyright 2019 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class NeosProtocolDecoder extends BaseProtocolDecoder {
+
+    public NeosProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text(">")
+            .number("(d{8}),")                   // id
+            .number("d+,")                       // status
+            .number("([01]),")                   // valid
+            .number("(dd)(dd)(dd),")             // date (yymmdd)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .expression("([EW])")
+            .number("(d+)(dd.d+),")              // longitude
+            .expression("([NS])")
+            .number("(d+)(dd.d+),")              // latitude
+            .expression("[^,]*,")                // response
+            .number("(d+),")                     // speed
+            .number("(d+),")                     // course
+            .number("(d+),")                     // rssi
+            .expression("[^,]*,")                // event data
+            .number("(d+)-")                     // adc
+            .number("(d+),")                     // battery
+            .number("0,")
+            .number("d,")
+            .number("([01]{8})")                 // input
+            .text("*")
+            .number("xx!")
+            .any()
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        if (channel != null) {
+            channel.writeAndFlush(new NetworkMessage("$OK!", remoteAddress));
+        }
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setValid(parser.nextInt() > 0);
+        position.setTime(parser.nextDateTime());
+        position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN));
+        position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN));
+        position.setSpeed(parser.nextInt());
+        position.setCourse(parser.nextInt());
+
+        position.set(Position.KEY_RSSI, parser.nextInt());
+        position.set(Position.PREFIX_ADC + 1, parser.nextInt());
+        position.set(Position.KEY_BATTERY_LEVEL, parser.nextInt());
+        position.set(Position.KEY_INPUT, parser.nextBinInt());
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/NoranProtocol.java b/src/main/java/org/traccar/protocol/NoranProtocol.java
new file mode 100644
index 000000000..9f3078d6d
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/NoranProtocol.java
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+import org.traccar.model.Command;
+
+public class NoranProtocol extends BaseProtocol {
+
+    public NoranProtocol() {
+        setSupportedDataCommands(
+                Command.TYPE_POSITION_SINGLE,
+                Command.TYPE_POSITION_PERIODIC,
+                Command.TYPE_POSITION_STOP,
+                Command.TYPE_ENGINE_STOP,
+                Command.TYPE_ENGINE_RESUME);
+        addServer(new TrackerServer(true, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new NoranProtocolEncoder());
+                pipeline.addLast(new NoranProtocolDecoder(NoranProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/NoranProtocolDecoder.java b/src/main/java/org/traccar/protocol/NoranProtocolDecoder.java
new file mode 100644
index 000000000..53dae7fd6
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/NoranProtocolDecoder.java
@@ -0,0 +1,164 @@
+/*
+ * Copyright 2013 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.text.DateFormat;
+import java.text.SimpleDateFormat;
+
+public class NoranProtocolDecoder extends BaseProtocolDecoder {
+
+    public NoranProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    public static final int MSG_UPLOAD_POSITION = 0x0008;
+    public static final int MSG_UPLOAD_POSITION_NEW = 0x0032;
+    public static final int MSG_CONTROL = 0x0002;
+    public static final int MSG_CONTROL_RESPONSE = 0x8009;
+    public static final int MSG_ALARM = 0x0003;
+    public static final int MSG_SHAKE_HAND = 0x0000;
+    public static final int MSG_SHAKE_HAND_RESPONSE = 0x8000;
+    public static final int MSG_IMAGE_SIZE = 0x0200;
+    public static final int MSG_IMAGE_PACKET = 0x0201;
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        buf.readUnsignedShortLE(); // length
+        int type = buf.readUnsignedShortLE();
+
+        if (type == MSG_SHAKE_HAND && channel != null) {
+
+            ByteBuf response = Unpooled.buffer(13);
+            response.writeCharSequence("\r\n*KW", StandardCharsets.US_ASCII);
+            response.writeByte(0);
+            response.writeShortLE(response.capacity());
+            response.writeShortLE(MSG_SHAKE_HAND_RESPONSE);
+            response.writeByte(1); // status
+            response.writeCharSequence("\r\n", StandardCharsets.US_ASCII);
+
+            channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
+
+        } else if (type == MSG_UPLOAD_POSITION || type == MSG_UPLOAD_POSITION_NEW
+                || type == MSG_CONTROL_RESPONSE || type == MSG_ALARM) {
+
+            boolean newFormat = false;
+            if (type == MSG_UPLOAD_POSITION && buf.readableBytes() == 48
+                    || type == MSG_ALARM && buf.readableBytes() == 48
+                    || type == MSG_CONTROL_RESPONSE && buf.readableBytes() == 57) {
+                newFormat = true;
+            }
+
+            Position position = new Position(getProtocolName());
+
+            if (type == MSG_CONTROL_RESPONSE) {
+                buf.readUnsignedIntLE(); // GIS ip
+                buf.readUnsignedIntLE(); // GIS port
+            }
+
+            position.setValid(BitUtil.check(buf.readUnsignedByte(), 0));
+
+            short alarm = buf.readUnsignedByte();
+            switch (alarm) {
+                case 1:
+                    position.set(Position.KEY_ALARM, Position.ALARM_SOS);
+                    break;
+                case 2:
+                    position.set(Position.KEY_ALARM, Position.ALARM_OVERSPEED);
+                    break;
+                case 3:
+                    position.set(Position.KEY_ALARM, Position.ALARM_GEOFENCE_EXIT);
+                    break;
+                case 9:
+                    position.set(Position.KEY_ALARM, Position.ALARM_POWER_OFF);
+                    break;
+                default:
+                    break;
+            }
+
+            if (newFormat) {
+                position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedIntLE()));
+                position.setCourse(buf.readFloatLE());
+            } else {
+                position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte()));
+                position.setCourse(buf.readUnsignedShortLE());
+            }
+            position.setLongitude(buf.readFloatLE());
+            position.setLatitude(buf.readFloatLE());
+
+            if (!newFormat) {
+                long timeValue = buf.readUnsignedIntLE();
+                DateBuilder dateBuilder = new DateBuilder()
+                        .setYear((int) BitUtil.from(timeValue, 26))
+                        .setMonth((int) BitUtil.between(timeValue, 22, 26))
+                        .setDay((int) BitUtil.between(timeValue, 17, 22))
+                        .setHour((int) BitUtil.between(timeValue, 12, 17))
+                        .setMinute((int) BitUtil.between(timeValue, 6, 12))
+                        .setSecond((int) BitUtil.to(timeValue, 6));
+                position.setTime(dateBuilder.getDate());
+            }
+
+            ByteBuf rawId;
+            if (newFormat) {
+                rawId = buf.readSlice(12);
+            } else {
+                rawId = buf.readSlice(11);
+            }
+            String id = rawId.toString(StandardCharsets.US_ASCII).replaceAll("[^\\p{Print}]", "");
+            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, id);
+            if (deviceSession == null) {
+                return null;
+            }
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            if (newFormat) {
+                DateFormat dateFormat = new SimpleDateFormat("yy-MM-dd HH:mm:ss");
+                position.setTime(dateFormat.parse(buf.readSlice(17).toString(StandardCharsets.US_ASCII)));
+                buf.readByte();
+            }
+
+            if (!newFormat) {
+                position.set(Position.PREFIX_IO + 1, buf.readUnsignedByte());
+                position.set(Position.KEY_FUEL_LEVEL, buf.readUnsignedByte());
+            } else if (type == MSG_UPLOAD_POSITION_NEW) {
+                position.set(Position.PREFIX_TEMP + 1, buf.readShortLE());
+                position.set(Position.KEY_ODOMETER, buf.readFloatLE());
+            }
+
+            return position;
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/NoranProtocolEncoder.java b/src/main/java/org/traccar/protocol/NoranProtocolEncoder.java
new file mode 100644
index 000000000..92826c8b2
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/NoranProtocolEncoder.java
@@ -0,0 +1,64 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import org.traccar.BaseProtocolEncoder;
+import org.traccar.model.Command;
+
+import java.nio.charset.StandardCharsets;
+
+public class NoranProtocolEncoder extends BaseProtocolEncoder {
+
+    private ByteBuf encodeContent(String content) {
+
+        ByteBuf buf = Unpooled.buffer(12 + 56);
+
+        buf.writeCharSequence("\r\n*KW", StandardCharsets.US_ASCII);
+        buf.writeByte(0);
+        buf.writeShortLE(buf.capacity());
+        buf.writeShortLE(NoranProtocolDecoder.MSG_CONTROL);
+        buf.writeInt(0); // gis ip
+        buf.writeShortLE(0); // gis port
+        buf.writeBytes(content.getBytes(StandardCharsets.US_ASCII));
+        buf.writerIndex(buf.writerIndex() + 50 - content.length());
+        buf.writeCharSequence("\r\n", StandardCharsets.US_ASCII);
+
+        return buf;
+    }
+
+    @Override
+    protected Object encodeCommand(Command command) {
+
+        switch (command.getType()) {
+            case Command.TYPE_POSITION_SINGLE:
+                return encodeContent("*KW,000,000,000000#");
+            case Command.TYPE_POSITION_PERIODIC:
+                int interval = command.getInteger(Command.KEY_FREQUENCY);
+                return encodeContent("*KW,000,002,000000," + interval + "#");
+            case Command.TYPE_POSITION_STOP:
+                return encodeContent("*KW,000,002,000000,0#");
+            case Command.TYPE_ENGINE_STOP:
+                return encodeContent("*KW,000,007,000000,0#");
+            case Command.TYPE_ENGINE_RESUME:
+                return encodeContent("*KW,000,007,000000,1#");
+            default:
+                return null;
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/NvsFrameDecoder.java b/src/main/java/org/traccar/protocol/NvsFrameDecoder.java
new file mode 100644
index 000000000..e93a58cf6
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/NvsFrameDecoder.java
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+import org.traccar.BaseFrameDecoder;
+
+public class NvsFrameDecoder extends BaseFrameDecoder {
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+        if (buf.readableBytes() < 4 + 2) {
+            return null;
+        }
+
+        int length;
+        if (buf.getUnsignedByte(buf.readerIndex()) == 0) {
+            length = 2 + buf.getUnsignedShort(buf.readerIndex());
+        } else {
+            length = 4 + 2 + buf.getUnsignedShort(buf.readerIndex() + 4) + 2;
+        }
+
+        if (buf.readableBytes() >= length) {
+            return buf.readRetainedSlice(length);
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/NvsProtocol.java b/src/main/java/org/traccar/protocol/NvsProtocol.java
new file mode 100644
index 000000000..d319b22f3
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/NvsProtocol.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class NvsProtocol extends BaseProtocol {
+
+    public NvsProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new NvsFrameDecoder());
+                pipeline.addLast(new NvsProtocolDecoder(NvsProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/NvsProtocolDecoder.java b/src/main/java/org/traccar/protocol/NvsProtocolDecoder.java
new file mode 100644
index 000000000..5d1159f7d
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/NvsProtocolDecoder.java
@@ -0,0 +1,137 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.Date;
+import java.util.LinkedList;
+import java.util.List;
+
+public class NvsProtocolDecoder extends BaseProtocolDecoder {
+
+    public NvsProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private void sendResponse(Channel channel, SocketAddress remoteAddress, String response) {
+        if (channel != null) {
+            channel.writeAndFlush(new NetworkMessage(
+                    Unpooled.copiedBuffer(response, StandardCharsets.US_ASCII), remoteAddress));
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+
+        if (buf.getUnsignedByte(buf.readerIndex()) == 0) {
+
+            buf.readUnsignedShort(); // length
+
+            String imei = buf.toString(buf.readerIndex(), 15, StandardCharsets.US_ASCII);
+
+            if (getDeviceSession(channel, remoteAddress, imei) != null) {
+                sendResponse(channel, remoteAddress, "OK");
+            } else {
+                sendResponse(channel, remoteAddress, "NO01");
+            }
+
+        } else {
+
+            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+            if (deviceSession == null) {
+                return null;
+            }
+
+            List<Position> positions = new LinkedList<>();
+
+            buf.skipBytes(4); // marker
+            buf.readUnsignedShort(); // length
+            buf.readLong(); // imei
+            buf.readUnsignedByte(); // codec
+            int count = buf.readUnsignedByte();
+
+            for (int i = 0; i < count; i++) {
+                Position position = new Position(getProtocolName());
+                position.setDeviceId(deviceSession.getDeviceId());
+
+                position.setTime(new Date(buf.readUnsignedInt() * 1000));
+
+                position.set("reason", buf.readUnsignedByte());
+
+                position.setLongitude(buf.readInt() / 10000000.0);
+                position.setLatitude(buf.readInt() / 10000000.0);
+                position.setAltitude(buf.readShort());
+                position.setCourse(buf.readUnsignedShort());
+
+                position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
+
+                position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShort()));
+                position.setValid(buf.readUnsignedByte() != 0);
+
+                buf.readUnsignedByte(); // used systems
+
+                buf.readUnsignedByte(); // cause element id
+
+                // Read 1 byte data
+                int cnt = buf.readUnsignedByte();
+                for (int j = 0; j < cnt; j++) {
+                    position.set(Position.PREFIX_IO + buf.readUnsignedByte(), buf.readUnsignedByte());
+                }
+
+                // Read 2 byte data
+                cnt = buf.readUnsignedByte();
+                for (int j = 0; j < cnt; j++) {
+                    position.set(Position.PREFIX_IO + buf.readUnsignedByte(), buf.readUnsignedShort());
+                }
+
+                // Read 4 byte data
+                cnt = buf.readUnsignedByte();
+                for (int j = 0; j < cnt; j++) {
+                    position.set(Position.PREFIX_IO + buf.readUnsignedByte(), buf.readUnsignedInt());
+                }
+
+                // Read 8 byte data
+                cnt = buf.readUnsignedByte();
+                for (int j = 0; j < cnt; j++) {
+                    position.set(Position.PREFIX_IO + buf.readUnsignedByte(), buf.readLong());
+                }
+
+                positions.add(position);
+            }
+
+            return positions;
+
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/NyitechProtocol.java b/src/main/java/org/traccar/protocol/NyitechProtocol.java
new file mode 100644
index 000000000..58974be5c
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/NyitechProtocol.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2019 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LengthFieldBasedFrameDecoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+import java.nio.ByteOrder;
+
+public class NyitechProtocol extends BaseProtocol {
+
+    public NyitechProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LengthFieldBasedFrameDecoder(ByteOrder.LITTLE_ENDIAN, 1024, 2, 2, -4, 0, true));
+                pipeline.addLast(new NyitechProtocolDecoder(NyitechProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/NyitechProtocolDecoder.java b/src/main/java/org/traccar/protocol/NyitechProtocolDecoder.java
new file mode 100644
index 000000000..e145205f7
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/NyitechProtocolDecoder.java
@@ -0,0 +1,123 @@
+/*
+ * Copyright 2019 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+
+public class NyitechProtocolDecoder extends BaseProtocolDecoder {
+
+    public NyitechProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    public static final short MSG_LOGIN = 0x1001;
+    public static final short MSG_COMPREHENSIVE_LIVE = 0x2001;
+    public static final short MSG_COMPREHENSIVE_HISTORY = 0x2002;
+    public static final short MSG_ALARM = 0x2003;
+    public static final short MSG_FIXED = 0x2004;
+
+    private void decodeLocation(Position position, ByteBuf buf) {
+
+        DateBuilder dateBuilder = new DateBuilder()
+                .setDateReverse(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte())
+                .setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte());
+        position.setTime(dateBuilder.getDate());
+
+        int flags = buf.readUnsignedByte();
+        position.setValid(BitUtil.to(flags, 2) > 0);
+
+        double lat = buf.readUnsignedIntLE() / 3600000.0;
+        double lon = buf.readUnsignedIntLE() / 3600000.0;
+
+        position.setLatitude(BitUtil.check(flags, 2) ? lat : -lat);
+        position.setLongitude(BitUtil.check(flags, 3) ? lon : -lon);
+
+        position.setSpeed(UnitsConverter.knotsFromCps(buf.readUnsignedShortLE()));
+        position.setCourse(buf.readUnsignedShortLE() * 0.1);
+        position.setAltitude(buf.readShortLE() * 0.1);
+    }
+
+    private String decodeAlarm(int type) {
+        switch (type) {
+            case 0x09:
+                return Position.ALARM_ACCELERATION;
+            case 0x0a:
+                return Position.ALARM_BRAKING;
+            case 0x0b:
+                return Position.ALARM_CORNERING;
+            case 0x0e:
+                return Position.ALARM_SOS;
+            default:
+                return null;
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        buf.skipBytes(2); // header
+        buf.readUnsignedShortLE(); // length
+
+        String id = buf.readCharSequence(12, StandardCharsets.US_ASCII).toString();
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, id);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        int type = buf.readUnsignedShortLE();
+
+        if (type != MSG_LOGIN && type != MSG_COMPREHENSIVE_LIVE
+                && type != MSG_COMPREHENSIVE_HISTORY && type != MSG_ALARM && type != MSG_FIXED) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        if (type == MSG_COMPREHENSIVE_LIVE || type == MSG_COMPREHENSIVE_HISTORY) {
+            buf.skipBytes(6); // time
+            buf.skipBytes(3); // data
+        } else if (type == MSG_ALARM) {
+            buf.readUnsignedShortLE(); // random number
+            buf.readUnsignedByte(); // tag
+            position.set(Position.KEY_ALARM, decodeAlarm(buf.readUnsignedByte()));
+            buf.readUnsignedShortLE(); // threshold
+            buf.readUnsignedShortLE(); // value
+            buf.skipBytes(6); // time
+        } else if (type == MSG_FIXED) {
+            buf.skipBytes(6); // time
+        }
+
+        decodeLocation(position, buf);
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/ObdDongleProtocol.java b/src/main/java/org/traccar/protocol/ObdDongleProtocol.java
new file mode 100644
index 000000000..10a55759b
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/ObdDongleProtocol.java
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LengthFieldBasedFrameDecoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class ObdDongleProtocol extends BaseProtocol {
+
+    public ObdDongleProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LengthFieldBasedFrameDecoder(1099, 20, 2, 3, 0));
+                pipeline.addLast(new ObdDongleProtocolDecoder(ObdDongleProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/ObdDongleProtocolDecoder.java b/src/main/java/org/traccar/protocol/ObdDongleProtocolDecoder.java
new file mode 100644
index 000000000..1c9771ce9
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/ObdDongleProtocolDecoder.java
@@ -0,0 +1,130 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.Date;
+
+public class ObdDongleProtocolDecoder extends BaseProtocolDecoder {
+
+    public ObdDongleProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    public static final int MSG_TYPE_CONNECT = 0x01;
+    public static final int MSG_TYPE_CONNACK = 0x02;
+    public static final int MSG_TYPE_PUBLISH = 0x03;
+    public static final int MSG_TYPE_PUBACK = 0x04;
+    public static final int MSG_TYPE_PINGREQ = 0x0C;
+    public static final int MSG_TYPE_PINGRESP = 0x0D;
+    public static final int MSG_TYPE_DISCONNECT = 0x0E;
+
+    private static void sendResponse(Channel channel, int type, int index, String imei, ByteBuf content) {
+        if (channel != null) {
+            ByteBuf response = Unpooled.buffer();
+            response.writeShort(0x5555); // header
+            response.writeShort(index);
+            response.writeBytes(imei.getBytes(StandardCharsets.US_ASCII));
+            response.writeByte(type);
+            response.writeShort(content.readableBytes());
+            response.writeBytes(content);
+            content.release();
+            response.writeByte(0); // checksum
+            response.writeShort(0xAAAA);
+            channel.writeAndFlush(new NetworkMessage(response, channel.remoteAddress()));
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        buf.skipBytes(2); // header
+        int index = buf.readUnsignedShort();
+
+        String imei = buf.readSlice(15).toString(StandardCharsets.US_ASCII);
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        int type = buf.readUnsignedByte();
+
+        buf.readUnsignedShort(); // data length
+
+        if (type == MSG_TYPE_CONNECT) {
+
+            ByteBuf response = Unpooled.buffer();
+            response.writeByte(1);
+            response.writeShort(0);
+            response.writeInt(0);
+            sendResponse(channel, MSG_TYPE_CONNACK, index, imei, response);
+
+        } else if (type == MSG_TYPE_PUBLISH) {
+
+            int typeMajor = buf.readUnsignedByte();
+            int typeMinor = buf.readUnsignedByte();
+
+            buf.readUnsignedByte(); // event id
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            position.setTime(new Date(buf.readUnsignedInt() * 1000));
+
+            int flags = buf.readUnsignedByte();
+
+            position.setValid(!BitUtil.check(flags, 6));
+
+            position.set(Position.KEY_SATELLITES, BitUtil.to(flags, 4));
+
+            double longitude = ((BitUtil.to(buf.readUnsignedShort(), 1) << 24) + buf.readUnsignedMedium()) * 0.00001;
+            position.setLongitude(BitUtil.check(flags, 5) ? longitude : -longitude);
+
+            double latitude = buf.readUnsignedMedium() * 0.00001;
+            position.setLatitude(BitUtil.check(flags, 4) ? latitude : -latitude);
+
+            int speedCourse = buf.readUnsignedMedium();
+            position.setSpeed(UnitsConverter.knotsFromMph(BitUtil.from(speedCourse, 10) * 0.1));
+            position.setCourse(BitUtil.to(speedCourse, 10));
+
+            ByteBuf response = Unpooled.buffer();
+            response.writeByte(typeMajor);
+            response.writeByte(typeMinor);
+            sendResponse(channel, MSG_TYPE_PUBACK, index, imei, response);
+
+            return position;
+
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/OigoProtocol.java b/src/main/java/org/traccar/protocol/OigoProtocol.java
new file mode 100644
index 000000000..5056f68aa
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/OigoProtocol.java
@@ -0,0 +1,33 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class OigoProtocol extends BaseProtocol {
+
+    public OigoProtocol() {
+        addServer(new TrackerServer(true, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new OigoProtocolDecoder(OigoProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/OigoProtocolDecoder.java b/src/main/java/org/traccar/protocol/OigoProtocolDecoder.java
new file mode 100644
index 000000000..b9cc71e8c
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/OigoProtocolDecoder.java
@@ -0,0 +1,240 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.ByteBufUtil;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+
+public class OigoProtocolDecoder extends BaseProtocolDecoder {
+
+    public OigoProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    public static final int MSG_AR_LOCATION = 0x00;
+    public static final int MSG_AR_REMOTE_START = 0x10;
+
+    public static final int MSG_ACKNOWLEDGEMENT = 0xE0;
+
+    private Position decodeArMessage(Channel channel, SocketAddress remoteAddress, ByteBuf buf) {
+
+        buf.skipBytes(1); // header
+        buf.readUnsignedShort(); // length
+
+        int type = buf.readUnsignedByte();
+
+        int tag = buf.readUnsignedByte();
+
+        DeviceSession deviceSession;
+        switch (BitUtil.to(tag, 3)) {
+            case 0:
+                String imei = ByteBufUtil.hexDump(buf.readSlice(8)).substring(1);
+                deviceSession = getDeviceSession(channel, remoteAddress, imei);
+                break;
+            case 1:
+                buf.skipBytes(1);
+                String meid = buf.readSlice(14).toString(StandardCharsets.US_ASCII);
+                deviceSession = getDeviceSession(channel, remoteAddress, meid);
+                break;
+            default:
+                deviceSession = getDeviceSession(channel, remoteAddress);
+                break;
+        }
+
+        if (deviceSession == null || type != MSG_AR_LOCATION) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.set(Position.KEY_EVENT, buf.readUnsignedByte());
+
+        int mask = buf.readInt();
+
+        if (BitUtil.check(mask, 0)) {
+            position.set(Position.KEY_INDEX, buf.readUnsignedShort());
+        }
+
+        if (BitUtil.check(mask, 1)) {
+            int date = buf.readUnsignedByte();
+            DateBuilder dateBuilder = new DateBuilder()
+                    .setDate(BitUtil.between(date, 4, 8) + 2010, BitUtil.to(date, 4), buf.readUnsignedByte())
+                    .setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte());
+            position.setTime(dateBuilder.getDate());
+        }
+
+        if (BitUtil.check(mask, 2)) {
+            buf.skipBytes(5); // device time
+        }
+
+        if (BitUtil.check(mask, 3)) {
+            position.setLatitude(buf.readUnsignedInt() * 0.000001 - 90);
+            position.setLongitude(buf.readUnsignedInt() * 0.000001 - 180.0);
+        }
+
+        if (BitUtil.check(mask, 4)) {
+            int status = buf.readUnsignedByte();
+            position.setValid(BitUtil.between(status, 4, 8) != 0);
+            position.set(Position.KEY_SATELLITES, BitUtil.to(status, 4));
+            position.set(Position.KEY_HDOP, buf.readUnsignedByte() * 0.1);
+        }
+
+        if (BitUtil.check(mask, 5)) {
+            position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte()));
+        }
+
+        if (BitUtil.check(mask, 6)) {
+            position.setCourse(buf.readUnsignedShort());
+        }
+
+        if (BitUtil.check(mask, 7)) {
+            position.setAltitude(buf.readShort());
+        }
+
+        if (BitUtil.check(mask, 8)) {
+            position.set(Position.KEY_RSSI, buf.readUnsignedByte());
+        }
+
+        if (BitUtil.check(mask, 9)) {
+            position.set(Position.KEY_POWER, buf.readUnsignedShort() * 0.001);
+        }
+
+        if (BitUtil.check(mask, 10)) {
+            position.set(Position.KEY_BATTERY, buf.readUnsignedShort() * 0.001);
+        }
+
+        if (BitUtil.check(mask, 11)) {
+            buf.skipBytes(2); // gpio
+        }
+
+        if (BitUtil.check(mask, 12)) {
+            position.set(Position.KEY_ODOMETER, buf.readUnsignedInt() * 1000);
+        }
+
+        if (BitUtil.check(mask, 13)) {
+            buf.skipBytes(6); // software version
+        }
+
+        if (BitUtil.check(mask, 14)) {
+            buf.skipBytes(5); // hardware version
+        }
+
+        if (BitUtil.check(mask, 15)) {
+            buf.readUnsignedShort(); // device config
+        }
+
+        return position;
+    }
+
+    private double convertCoordinate(long value) {
+        boolean negative = value < 0;
+        value = Math.abs(value);
+        double minutes = (value % 100000) * 0.001;
+        value /= 100000;
+        double degrees = value + minutes / 60;
+        return negative ? -degrees : degrees;
+    }
+
+    private Position decodeMgMessage(Channel channel, SocketAddress remoteAddress, ByteBuf buf) {
+
+        buf.readUnsignedByte(); // tag
+        int flags = buf.getUnsignedByte(buf.readerIndex());
+
+        DeviceSession deviceSession;
+        if (BitUtil.check(flags, 6)) {
+            buf.readUnsignedByte(); // flags
+            deviceSession = getDeviceSession(channel, remoteAddress);
+        } else {
+            String imei = ByteBufUtil.hexDump(buf.readSlice(8)).substring(1);
+            deviceSession = getDeviceSession(channel, remoteAddress, imei);
+        }
+
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        buf.skipBytes(8); // imsi
+
+        int date = buf.readUnsignedShort();
+
+        DateBuilder dateBuilder = new DateBuilder()
+                .setDate(2010 + BitUtil.from(date, 12), BitUtil.between(date, 8, 12), BitUtil.to(date, 8))
+                .setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), 0);
+
+        position.setValid(true);
+        position.setLatitude(convertCoordinate(buf.readInt()));
+        position.setLongitude(convertCoordinate(buf.readInt()));
+
+        position.setAltitude(UnitsConverter.metersFromFeet(buf.readShort()));
+        position.setCourse(buf.readUnsignedShort());
+        position.setSpeed(UnitsConverter.knotsFromMph(buf.readUnsignedByte()));
+
+        position.set(Position.KEY_POWER, buf.readUnsignedByte() * 0.1);
+        position.set(Position.PREFIX_IO + 1, buf.readUnsignedByte());
+
+        dateBuilder.setSecond(buf.readUnsignedByte());
+        position.setTime(dateBuilder.getDate());
+
+        position.set(Position.KEY_RSSI, buf.readUnsignedByte());
+
+        int index = buf.readUnsignedByte();
+
+        position.set(Position.KEY_VERSION_FW, buf.readUnsignedByte());
+        position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
+        position.set(Position.KEY_ODOMETER, (long) (buf.readUnsignedInt() * 1609.34));
+
+        if (channel != null && BitUtil.check(flags, 7)) {
+            ByteBuf response = Unpooled.buffer();
+            response.writeByte(MSG_ACKNOWLEDGEMENT);
+            response.writeByte(index);
+            response.writeByte(0x00);
+            channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
+        }
+
+        return position;
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        if (buf.getUnsignedByte(buf.readerIndex()) == 0x7e) {
+            return decodeArMessage(channel, remoteAddress, buf);
+        } else {
+            return decodeMgMessage(channel, remoteAddress, buf);
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/OkoProtocol.java b/src/main/java/org/traccar/protocol/OkoProtocol.java
new file mode 100644
index 000000000..9571ccc48
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/OkoProtocol.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import org.traccar.BaseProtocol;
+import org.traccar.CharacterDelimiterFrameDecoder;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class OkoProtocol extends BaseProtocol {
+
+    public OkoProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, '}'));
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new OkoProtocolDecoder(OkoProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/OkoProtocolDecoder.java b/src/main/java/org/traccar/protocol/OkoProtocolDecoder.java
new file mode 100644
index 000000000..5adf61494
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/OkoProtocolDecoder.java
@@ -0,0 +1,100 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class OkoProtocolDecoder extends BaseProtocolDecoder {
+
+    public OkoProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("{")
+            .number("(d{15}),").optional()       // imei
+            .number("(dd)(dd)(dd).d+,")          // time
+            .expression("([AV]),")               // validity
+            .number("(dd)(dd.d+),")              // latitude
+            .expression("([NS]),")
+            .number("(ddd)(dd.d+),")             // longitude
+            .expression("([EW]),")
+            .number("(d+.?d*)?,")                // speed
+            .number("(d+.?d*)?,")                // course
+            .number("(dd)(dd)(dd),")             // date (ddmmyy)
+            .number("(d+),")                     // satellites
+            .number("(d+.d+),")                  // adc
+            .number("(xx),")                     // event
+            .number("(d+.d+),")                  // power
+            .number("d,")                        // memory status
+            .number("(xx)")                      // io
+            .any()
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession;
+        if (parser.hasNext()) {
+            deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        } else {
+            deviceSession = getDeviceSession(channel, remoteAddress);
+        }
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        DateBuilder dateBuilder = new DateBuilder()
+                .setTime(parser.nextInt(), parser.nextInt(), parser.nextInt());
+
+        position.setValid(parser.next().equals("A"));
+        position.setLatitude(parser.nextCoordinate());
+        position.setLongitude(parser.nextCoordinate());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
+
+        dateBuilder.setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt());
+        position.setTime(dateBuilder.getDate());
+
+        position.set(Position.KEY_SATELLITES, parser.nextInt());
+        position.set(Position.PREFIX_ADC + 1, parser.nextDouble());
+        position.set(Position.KEY_EVENT, parser.next());
+        position.set(Position.KEY_POWER, parser.nextDouble());
+        position.set(Position.KEY_INPUT, parser.nextHexInt());
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/OpenGtsProtocol.java b/src/main/java/org/traccar/protocol/OpenGtsProtocol.java
new file mode 100644
index 000000000..5ef3260c6
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/OpenGtsProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.http.HttpObjectAggregator;
+import io.netty.handler.codec.http.HttpRequestDecoder;
+import io.netty.handler.codec.http.HttpResponseEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class OpenGtsProtocol extends BaseProtocol {
+
+    public OpenGtsProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new HttpResponseEncoder());
+                pipeline.addLast(new HttpRequestDecoder());
+                pipeline.addLast(new HttpObjectAggregator(16384));
+                pipeline.addLast(new OpenGtsProtocolDecoder(OpenGtsProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/OpenGtsProtocolDecoder.java b/src/main/java/org/traccar/protocol/OpenGtsProtocolDecoder.java
new file mode 100644
index 000000000..b76cbfa85
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/OpenGtsProtocolDecoder.java
@@ -0,0 +1,115 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import io.netty.handler.codec.http.FullHttpRequest;
+import io.netty.handler.codec.http.HttpResponseStatus;
+import io.netty.handler.codec.http.QueryStringDecoder;
+import org.traccar.BaseHttpProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.List;
+import java.util.Map;
+import java.util.regex.Pattern;
+
+public class OpenGtsProtocolDecoder extends BaseHttpProtocolDecoder {
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("$GPRMC,")
+            .number("(dd)(dd)(dd)(?:.d+)?,")     // time (hhmmss)
+            .expression("([AV]),")               // validity
+            .number("(d+)(dd.d+),")              // latitude
+            .expression("([NS]),")
+            .number("(d+)(dd.d+),")              // longitude
+            .expression("([EW]),")
+            .number("(d+.d+),")                  // speed
+            .number("(d+.d+)?,")                 // course
+            .number("(dd)(dd)(dd),")             // date (ddmmyy)
+            .any()
+            .compile();
+
+    public OpenGtsProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        FullHttpRequest request = (FullHttpRequest) msg;
+        QueryStringDecoder decoder = new QueryStringDecoder(request.uri());
+        Map<String, List<String>> params = decoder.parameters();
+
+        Position position = new Position(getProtocolName());
+
+        for (Map.Entry<String, List<String>> entry : params.entrySet()) {
+            String value = entry.getValue().get(0);
+            switch (entry.getKey()) {
+                case "id":
+                    DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, value);
+                    if (deviceSession == null) {
+                        sendResponse(channel, HttpResponseStatus.BAD_REQUEST);
+                        return null;
+                    }
+                    position.setDeviceId(deviceSession.getDeviceId());
+                    break;
+                case "gprmc":
+                    Parser parser = new Parser(PATTERN, value);
+                    if (!parser.matches()) {
+                            sendResponse(channel, HttpResponseStatus.BAD_REQUEST);
+                        return null;
+                    }
+
+                    DateBuilder dateBuilder = new DateBuilder()
+                            .setTime(parser.nextInt(), parser.nextInt(), parser.nextInt());
+
+                    position.setValid(parser.next().equals("A"));
+                    position.setLatitude(parser.nextCoordinate());
+                    position.setLongitude(parser.nextCoordinate());
+                    position.setSpeed(parser.nextDouble());
+                    position.setCourse(parser.nextDouble(0));
+
+                    dateBuilder.setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt());
+                    position.setTime(dateBuilder.getDate());
+                    break;
+                case "alt":
+                    position.setAltitude(Double.parseDouble(value));
+                    break;
+                case "batt":
+                    position.set(Position.KEY_BATTERY_LEVEL, Double.parseDouble(value));
+                    break;
+                default:
+                    break;
+            }
+        }
+
+        if (position.getDeviceId() != 0) {
+            sendResponse(channel, HttpResponseStatus.OK);
+            return position;
+        } else {
+            sendResponse(channel, HttpResponseStatus.BAD_REQUEST);
+            return null;
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/OrionFrameDecoder.java b/src/main/java/org/traccar/protocol/OrionFrameDecoder.java
new file mode 100644
index 000000000..948806609
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/OrionFrameDecoder.java
@@ -0,0 +1,68 @@
+/*
+ * Copyright 2014 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+import org.traccar.BaseFrameDecoder;
+
+public class OrionFrameDecoder extends BaseFrameDecoder {
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+        int length = 6;
+
+        if (buf.readableBytes() >= length) {
+
+            int type = buf.getUnsignedByte(buf.readerIndex() + 2) & 0x0f;
+
+            if (type == OrionProtocolDecoder.MSG_USERLOG && buf.readableBytes() >= length + 5) {
+
+                int index = buf.readerIndex() + 3;
+                int count = buf.getUnsignedByte(index) & 0x0f;
+                index += 5;
+                length += 5;
+
+                for (int i = 0; i < count; i++) {
+                    if (buf.readableBytes() < length) {
+                        return null;
+                    }
+                    int logLength = buf.getUnsignedByte(index + 1);
+                    index += logLength;
+                    length += logLength;
+                }
+
+                if (buf.readableBytes() >= length) {
+                    return buf.readRetainedSlice(length);
+                }
+
+            } else if (type == OrionProtocolDecoder.MSG_SYSLOG && buf.readableBytes() >= length + 12) {
+
+                length += buf.getUnsignedShortLE(buf.readerIndex() + 8);
+                if (buf.readableBytes() >= length) {
+                    return buf.readRetainedSlice(length);
+                }
+
+            }
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/OrionProtocol.java b/src/main/java/org/traccar/protocol/OrionProtocol.java
new file mode 100644
index 000000000..8485ae638
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/OrionProtocol.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class OrionProtocol extends BaseProtocol {
+
+    public OrionProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new OrionFrameDecoder());
+                pipeline.addLast(new OrionProtocolDecoder(OrionProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/OrionProtocolDecoder.java b/src/main/java/org/traccar/protocol/OrionProtocolDecoder.java
new file mode 100644
index 000000000..af819989e
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/OrionProtocolDecoder.java
@@ -0,0 +1,115 @@
+/*
+ * Copyright 2014 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.DateBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.LinkedList;
+import java.util.List;
+
+public class OrionProtocolDecoder extends BaseProtocolDecoder {
+
+    public OrionProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    public static final int MSG_USERLOG = 0;
+    public static final int MSG_SYSLOG = 3;
+
+    private static void sendResponse(Channel channel, ByteBuf buf) {
+        if (channel != null) {
+            ByteBuf response = Unpooled.buffer(4);
+            response.writeByte('*');
+            response.writeShort(buf.getUnsignedShort(buf.writerIndex() - 2));
+            response.writeByte(buf.getUnsignedByte(buf.writerIndex() - 3));
+            channel.writeAndFlush(new NetworkMessage(response, channel.remoteAddress()));
+        }
+    }
+
+    private static double convertCoordinate(int raw) {
+        int degrees = raw / 1000000;
+        double minutes = (raw % 1000000) / 10000.0;
+        return degrees + minutes / 60;
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        buf.skipBytes(2); // header
+        int type = buf.readUnsignedByte() & 0x0f;
+
+        if (type == MSG_USERLOG) {
+
+            int header = buf.readUnsignedByte();
+
+            if ((header & 0x40) != 0) {
+                sendResponse(channel, buf);
+            }
+
+            DeviceSession deviceSession = getDeviceSession(
+                    channel, remoteAddress, String.valueOf(buf.readUnsignedInt()));
+            if (deviceSession == null) {
+                return null;
+            }
+
+            List<Position> positions = new LinkedList<>();
+
+            for (int i = 0; i < (header & 0x0f); i++) {
+
+                Position position = new Position(getProtocolName());
+                position.setDeviceId(deviceSession.getDeviceId());
+
+                position.set(Position.KEY_EVENT, buf.readUnsignedByte());
+                buf.readUnsignedByte(); // length
+                position.set(Position.KEY_FLAGS, buf.readUnsignedShortLE());
+
+                position.setLatitude(convertCoordinate(buf.readIntLE()));
+                position.setLongitude(convertCoordinate(buf.readIntLE()));
+                position.setAltitude(buf.readShortLE() / 10.0);
+                position.setCourse(buf.readUnsignedShortLE());
+                position.setSpeed(buf.readUnsignedShortLE() * 0.0539957);
+
+                DateBuilder dateBuilder = new DateBuilder()
+                        .setDate(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte())
+                        .setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte());
+                position.setTime(dateBuilder.getDate());
+
+                int satellites = buf.readUnsignedByte();
+                position.setValid(satellites >= 3);
+                position.set(Position.KEY_SATELLITES, satellites);
+
+                positions.add(position);
+            }
+
+            return positions;
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/OsmAndProtocol.java b/src/main/java/org/traccar/protocol/OsmAndProtocol.java
new file mode 100644
index 000000000..d3aa2fd6f
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/OsmAndProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2015 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.http.HttpObjectAggregator;
+import io.netty.handler.codec.http.HttpRequestDecoder;
+import io.netty.handler.codec.http.HttpResponseEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class OsmAndProtocol extends BaseProtocol {
+
+    public OsmAndProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new HttpResponseEncoder());
+                pipeline.addLast(new HttpRequestDecoder());
+                pipeline.addLast(new HttpObjectAggregator(16384));
+                pipeline.addLast(new OsmAndProtocolDecoder(OsmAndProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/OsmAndProtocolDecoder.java b/src/main/java/org/traccar/protocol/OsmAndProtocolDecoder.java
new file mode 100644
index 000000000..3bc71de81
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/OsmAndProtocolDecoder.java
@@ -0,0 +1,184 @@
+/*
+ * Copyright 2013 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import io.netty.handler.codec.http.FullHttpRequest;
+import io.netty.handler.codec.http.HttpResponseStatus;
+import io.netty.handler.codec.http.QueryStringDecoder;
+import org.traccar.BaseHttpProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.DateUtil;
+import org.traccar.model.CellTower;
+import org.traccar.model.Network;
+import org.traccar.model.Position;
+import org.traccar.model.WifiAccessPoint;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.text.DateFormat;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.List;
+import java.util.Map;
+
+public class OsmAndProtocolDecoder extends BaseHttpProtocolDecoder {
+
+    public OsmAndProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    @Override
+    protected Object decode(Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        FullHttpRequest request = (FullHttpRequest) msg;
+        QueryStringDecoder decoder = new QueryStringDecoder(request.uri());
+        Map<String, List<String>> params = decoder.parameters();
+        if (params.isEmpty()) {
+            decoder = new QueryStringDecoder(request.content().toString(StandardCharsets.US_ASCII), false);
+            params = decoder.parameters();
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setValid(true);
+
+        Network network = new Network();
+
+        for (Map.Entry<String, List<String>> entry : params.entrySet()) {
+            for (String value : entry.getValue()) {
+                switch (entry.getKey()) {
+                    case "id":
+                    case "deviceid":
+                        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, value);
+                        if (deviceSession == null) {
+                            sendResponse(channel, HttpResponseStatus.BAD_REQUEST);
+                            return null;
+                        }
+                        position.setDeviceId(deviceSession.getDeviceId());
+                        break;
+                    case "valid":
+                        position.setValid(Boolean.parseBoolean(value) || "1".equals(value));
+                        break;
+                    case "timestamp":
+                        try {
+                            long timestamp = Long.parseLong(value);
+                            if (timestamp < Integer.MAX_VALUE) {
+                                timestamp *= 1000;
+                            }
+                            position.setTime(new Date(timestamp));
+                        } catch (NumberFormatException error) {
+                            if (value.contains("T")) {
+                                position.setTime(DateUtil.parseDate(value));
+                            } else {
+                                DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
+                                position.setTime(dateFormat.parse(value));
+                            }
+                        }
+                        break;
+                    case "lat":
+                        position.setLatitude(Double.parseDouble(value));
+                        break;
+                    case "lon":
+                        position.setLongitude(Double.parseDouble(value));
+                        break;
+                    case "location":
+                        String[] location = value.split(",");
+                        position.setLatitude(Double.parseDouble(location[0]));
+                        position.setLongitude(Double.parseDouble(location[1]));
+                        break;
+                    case "cell":
+                        String[] cell = value.split(",");
+                        if (cell.length > 4) {
+                            network.addCellTower(CellTower.from(
+                                    Integer.parseInt(cell[0]), Integer.parseInt(cell[1]),
+                                    Integer.parseInt(cell[2]), Integer.parseInt(cell[3]), Integer.parseInt(cell[4])));
+                        } else {
+                            network.addCellTower(CellTower.from(
+                                    Integer.parseInt(cell[0]), Integer.parseInt(cell[1]),
+                                    Integer.parseInt(cell[2]), Integer.parseInt(cell[3])));
+                        }
+                        break;
+                    case "wifi":
+                        String[] wifi = value.split(",");
+                        network.addWifiAccessPoint(WifiAccessPoint.from(
+                                wifi[0].replace('-', ':'), Integer.parseInt(wifi[1])));
+                        break;
+                    case "speed":
+                        position.setSpeed(convertSpeed(Double.parseDouble(value), "kn"));
+                        break;
+                    case "bearing":
+                    case "heading":
+                        position.setCourse(Double.parseDouble(value));
+                        break;
+                    case "altitude":
+                        position.setAltitude(Double.parseDouble(value));
+                        break;
+                    case "accuracy":
+                        position.setAccuracy(Double.parseDouble(value));
+                        break;
+                    case "hdop":
+                        position.set(Position.KEY_HDOP, Double.parseDouble(value));
+                        break;
+                    case "batt":
+                        position.set(Position.KEY_BATTERY_LEVEL, Double.parseDouble(value));
+                        break;
+                    case "driverUniqueId":
+                        position.set(Position.KEY_DRIVER_UNIQUE_ID, value);
+                        break;
+                    default:
+                        try {
+                            position.set(entry.getKey(), Double.parseDouble(value));
+                        } catch (NumberFormatException e) {
+                            switch (value) {
+                                case "true":
+                                    position.set(entry.getKey(), true);
+                                    break;
+                                case "false":
+                                    position.set(entry.getKey(), false);
+                                    break;
+                                default:
+                                    position.set(entry.getKey(), value);
+                                    break;
+                            }
+                        }
+                        break;
+                }
+            }
+        }
+
+        if (position.getFixTime() == null) {
+            position.setTime(new Date());
+        }
+
+        if (network.getCellTowers() != null || network.getWifiAccessPoints() != null) {
+            position.setNetwork(network);
+        }
+
+        if (position.getLatitude() == 0 && position.getLongitude() == 0) {
+            getLastLocation(position, position.getDeviceTime());
+        }
+
+        if (position.getDeviceId() != 0) {
+            sendResponse(channel, HttpResponseStatus.OK);
+            return position;
+        } else {
+            sendResponse(channel, HttpResponseStatus.BAD_REQUEST);
+            return null;
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/OwnTracksProtocol.java b/src/main/java/org/traccar/protocol/OwnTracksProtocol.java
new file mode 100644
index 000000000..0086371d8
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/OwnTracksProtocol.java
@@ -0,0 +1,40 @@
+/*
+ * Copyright 2017 Jan-Piet Mens (jpmens@gmail.com)
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.http.HttpObjectAggregator;
+import io.netty.handler.codec.http.HttpRequestDecoder;
+import io.netty.handler.codec.http.HttpResponseEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class OwnTracksProtocol extends BaseProtocol {
+
+    public OwnTracksProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new HttpResponseEncoder());
+                pipeline.addLast(new HttpRequestDecoder());
+                pipeline.addLast(new HttpObjectAggregator(16384));
+                pipeline.addLast(new OwnTracksProtocolDecoder(OwnTracksProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/OwnTracksProtocolDecoder.java b/src/main/java/org/traccar/protocol/OwnTracksProtocolDecoder.java
new file mode 100644
index 000000000..323d97fa3
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/OwnTracksProtocolDecoder.java
@@ -0,0 +1,215 @@
+/*
+ * Copyright 2017 Jan-Piet Mens (jpmens@gmail.com)
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import io.netty.handler.codec.http.FullHttpRequest;
+import io.netty.handler.codec.http.HttpResponseStatus;
+import org.traccar.BaseHttpProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import javax.json.Json;
+import javax.json.JsonObject;
+import java.io.StringReader;
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.Date;
+
+public class OwnTracksProtocolDecoder extends BaseHttpProtocolDecoder {
+
+    public OwnTracksProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        FullHttpRequest request = (FullHttpRequest) msg;
+        JsonObject root = Json.createReader(
+                new StringReader(request.content().toString(StandardCharsets.US_ASCII))).readObject();
+
+        if (!root.containsKey("_type")) {
+            sendResponse(channel, HttpResponseStatus.OK);
+            return null;
+        }
+        if (!root.getString("_type").equals("location")
+            && !root.getString("_type").equals("lwt")) {
+            sendResponse(channel, HttpResponseStatus.BAD_REQUEST);
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        String uniqueId;
+
+        if (root.containsKey("topic")) {
+            uniqueId = root.getString("topic");
+            if (root.containsKey("tid")) {
+                position.set("tid", root.getString("tid"));
+            }
+        } else {
+            uniqueId = root.getString("tid");
+        }
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, uniqueId);
+        if (deviceSession == null) {
+            sendResponse(channel, HttpResponseStatus.BAD_REQUEST);
+            return null;
+        }
+
+        if (root.getString("_type").equals("lwt")) {
+            sendResponse(channel, HttpResponseStatus.OK);
+            return null;
+        }
+
+        if (root.containsKey("t") && root.getString("t").equals("p")) {
+            sendResponse(channel, HttpResponseStatus.OK);
+            return null;
+        }
+
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setTime(new Date(root.getJsonNumber("tst").longValue() * 1000));
+        if (root.containsKey("sent")) {
+            position.setDeviceTime(new Date(root.getJsonNumber("sent").longValue() * 1000));
+        }
+
+        position.setValid(true);
+
+        position.setLatitude(root.getJsonNumber("lat").doubleValue());
+        position.setLongitude(root.getJsonNumber("lon").doubleValue());
+
+        if (root.containsKey("vel")) {
+            position.setSpeed(UnitsConverter.knotsFromKph(root.getInt("vel")));
+        }
+        if (root.containsKey("alt")) {
+            position.setAltitude(root.getInt("alt"));
+        }
+        if (root.containsKey("cog")) {
+            position.setCourse(root.getInt("cog"));
+        }
+        if (root.containsKey("acc")) {
+            position.setAccuracy(root.getInt("acc"));
+        }
+        if (root.containsKey("t")) {
+            String trigger = root.getString("t");
+            position.set("t", trigger);
+            Integer reportType = -1;
+            if (root.containsKey("rty")) {
+                 reportType = root.getInt("rty");
+            }
+            setEventOrAlarm(position, trigger, reportType);
+        }
+        if (root.containsKey("batt")) {
+            position.set(Position.KEY_BATTERY_LEVEL, root.getInt("batt"));
+        }
+        if (root.containsKey("uext")) {
+            position.set(Position.KEY_POWER, root.getJsonNumber("uext").doubleValue());
+        }
+        if (root.containsKey("ubatt")) {
+            position.set(Position.KEY_BATTERY, root.getJsonNumber("ubatt").doubleValue());
+        }
+        if (root.containsKey("vin")) {
+            position.set(Position.KEY_VIN, root.getString("vin"));
+        }
+        if (root.containsKey("name")) {
+            position.set(Position.KEY_VIN, root.getString("name"));
+        }
+        if (root.containsKey("rpm")) {
+            position.set(Position.KEY_RPM, root.getInt("rpm"));
+        }
+        if (root.containsKey("ign")) {
+            position.set(Position.KEY_IGNITION, root.getBoolean("ign"));
+        }
+        if (root.containsKey("motion")) {
+            position.set(Position.KEY_MOTION, root.getBoolean("motion"));
+        }
+        if (root.containsKey("odometer")) {
+            position.set(Position.KEY_ODOMETER, root.getJsonNumber("odometer").doubleValue() * 1000.0);
+        }
+        if (root.containsKey("hmc")) {
+            position.set(Position.KEY_HOURS, root.getJsonNumber("hmc").doubleValue() / 3600.0);
+        }
+
+        if (root.containsKey("anum")) {
+            Integer numberOfAnalogueInputs = root.getInt("anum");
+            for (Integer i = 0; i < numberOfAnalogueInputs; i++) {
+                String indexString = String.format("%02d", i);
+                if (root.containsKey("adda-" + indexString)) {
+                    position.set(Position.PREFIX_ADC + (i + 1), root.getString("adda-" + indexString));
+                }
+                if (root.containsKey("temp_c-" + indexString)) {
+                    position.set(Position.PREFIX_TEMP + (i + 1),
+                        root.getJsonNumber("temp_c-" + indexString).doubleValue());
+                }
+            }
+        }
+
+        sendResponse(channel, HttpResponseStatus.OK);
+        return position;
+    }
+
+    private void setEventOrAlarm(Position position, String trigger, Integer reportType) {
+        switch (trigger) {
+            case "9":
+                position.set(Position.KEY_ALARM, Position.ALARM_LOW_BATTERY);
+                break;
+            case "1":
+                position.set(Position.KEY_ALARM, Position.ALARM_POWER_ON);
+                break;
+            case "i":
+                position.set(Position.KEY_IGNITION, true);
+                break;
+            case "I":
+                position.set(Position.KEY_IGNITION, false);
+                break;
+            case "E":
+                position.set(Position.KEY_ALARM, Position.ALARM_POWER_RESTORED);
+                break;
+            case "e":
+                position.set(Position.KEY_ALARM, Position.ALARM_POWER_CUT);
+                break;
+            case "!":
+                position.set(Position.KEY_ALARM, Position.ALARM_TOW);
+                break;
+            case "s":
+                position.set(Position.KEY_ALARM, Position.ALARM_OVERSPEED);
+                break;
+            case "h":
+                switch (reportType) {
+                    case 0:
+                    case 3:
+                        position.set(Position.KEY_ALARM, Position.ALARM_BRAKING);
+                        break;
+                    case 1:
+                    case 4:
+                        position.set(Position.KEY_ALARM, Position.ALARM_ACCELERATION);
+                        break;
+                    case 2:
+                    case 5:
+                    default:
+                        position.set(Position.KEY_ALARM, Position.ALARM_CORNERING);
+                        break;
+                }
+                break;
+            default:
+                break;
+        }
+    }
+}
diff --git a/src/main/java/org/traccar/protocol/PathAwayProtocol.java b/src/main/java/org/traccar/protocol/PathAwayProtocol.java
new file mode 100644
index 000000000..6b5d75c5e
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/PathAwayProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.http.HttpObjectAggregator;
+import io.netty.handler.codec.http.HttpRequestDecoder;
+import io.netty.handler.codec.http.HttpResponseEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class PathAwayProtocol extends BaseProtocol {
+
+    public PathAwayProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new HttpResponseEncoder());
+                pipeline.addLast(new HttpRequestDecoder());
+                pipeline.addLast(new HttpObjectAggregator(16384));
+                pipeline.addLast(new PathAwayProtocolDecoder(PathAwayProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/PathAwayProtocolDecoder.java b/src/main/java/org/traccar/protocol/PathAwayProtocolDecoder.java
new file mode 100644
index 000000000..02a15e34a
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/PathAwayProtocolDecoder.java
@@ -0,0 +1,97 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelFutureListener;
+import io.netty.handler.codec.http.DefaultFullHttpResponse;
+import io.netty.handler.codec.http.FullHttpRequest;
+import io.netty.handler.codec.http.FullHttpResponse;
+import io.netty.handler.codec.http.HttpResponseStatus;
+import io.netty.handler.codec.http.HttpVersion;
+import io.netty.handler.codec.http.QueryStringDecoder;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class PathAwayProtocolDecoder extends BaseProtocolDecoder {
+
+    public PathAwayProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("$PWS,")
+            .number("d+,")                       // version
+            .expression("[^,]*,")                // name
+            .expression("[^,]*,")                // icon
+            .expression("[^,]*,")                // color
+            .number("(dd)(dd)(dd),")             // date (ddmmyy)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .number("(-?d+.d+),")                // latitude
+            .number("(-?d+.d+),")                // longitude
+            .number("(-?d+.?d*),")               // altitude
+            .number("(-?d+.?d*),")               // speed
+            .number("(-?d+.?d*),")               // course
+            .any()
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        FullHttpRequest request = (FullHttpRequest) msg;
+        QueryStringDecoder decoder = new QueryStringDecoder(request.uri());
+
+        DeviceSession deviceSession = getDeviceSession(
+                channel, remoteAddress, decoder.parameters().get("UserName").get(0));
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Parser parser = new Parser(PATTERN, decoder.parameters().get("LOC").get(0));
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
+
+        position.setValid(true);
+        position.setLatitude(parser.nextDouble(0));
+        position.setLongitude(parser.nextDouble(0));
+        position.setAltitude(parser.nextDouble(0));
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
+
+        if (channel != null) {
+            FullHttpResponse response = new DefaultFullHttpResponse(HttpVersion.HTTP_1_1, HttpResponseStatus.OK);
+            channel.writeAndFlush(new NetworkMessage(response, remoteAddress)).addListener(ChannelFutureListener.CLOSE);
+        }
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/PiligrimProtocol.java b/src/main/java/org/traccar/protocol/PiligrimProtocol.java
new file mode 100644
index 000000000..d88c1ab72
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/PiligrimProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.http.HttpObjectAggregator;
+import io.netty.handler.codec.http.HttpRequestDecoder;
+import io.netty.handler.codec.http.HttpResponseEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class PiligrimProtocol extends BaseProtocol {
+
+    public PiligrimProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new HttpResponseEncoder());
+                pipeline.addLast(new HttpRequestDecoder());
+                pipeline.addLast(new HttpObjectAggregator(16384));
+                pipeline.addLast(new PiligrimProtocolDecoder(PiligrimProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/PiligrimProtocolDecoder.java b/src/main/java/org/traccar/protocol/PiligrimProtocolDecoder.java
new file mode 100644
index 000000000..47aa86da7
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/PiligrimProtocolDecoder.java
@@ -0,0 +1,167 @@
+/*
+ * Copyright 2014 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import io.netty.handler.codec.http.DefaultFullHttpResponse;
+import io.netty.handler.codec.http.FullHttpRequest;
+import io.netty.handler.codec.http.FullHttpResponse;
+import io.netty.handler.codec.http.HttpResponseStatus;
+import io.netty.handler.codec.http.HttpVersion;
+import io.netty.handler.codec.http.QueryStringDecoder;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.DateBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.LinkedList;
+import java.util.List;
+
+public class PiligrimProtocolDecoder extends BaseProtocolDecoder {
+
+    public PiligrimProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private void sendResponse(Channel channel, String message) {
+        if (channel != null) {
+            FullHttpResponse response = new DefaultFullHttpResponse(
+                    HttpVersion.HTTP_1_1, HttpResponseStatus.OK,
+                    Unpooled.copiedBuffer(message, StandardCharsets.US_ASCII));
+            channel.writeAndFlush(new NetworkMessage(response, channel.remoteAddress()));
+        }
+    }
+
+    public static final int MSG_GPS = 0xF1;
+    public static final int MSG_GPS_SENSORS = 0xF2;
+    public static final int MSG_EVENTS = 0xF3;
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        FullHttpRequest request = (FullHttpRequest) msg;
+        String uri = request.uri();
+
+        if (uri.startsWith("/config")) {
+
+            sendResponse(channel, "CONFIG: OK");
+
+        } else if (uri.startsWith("/addlog")) {
+
+            sendResponse(channel, "ADDLOG: OK");
+
+        } else if (uri.startsWith("/inform")) {
+
+            sendResponse(channel, "INFORM: OK");
+
+        } else if (uri.startsWith("/bingps")) {
+
+            sendResponse(channel, "BINGPS: OK");
+
+            QueryStringDecoder decoder = new QueryStringDecoder(request.uri());
+            DeviceSession deviceSession = getDeviceSession(
+                    channel, remoteAddress, decoder.parameters().get("imei").get(0));
+            if (deviceSession == null) {
+                return null;
+            }
+
+            List<Position> positions = new LinkedList<>();
+            ByteBuf buf = request.content();
+
+            while (buf.readableBytes() > 2) {
+
+                buf.readUnsignedByte(); // header
+                int type = buf.readUnsignedByte();
+                buf.readUnsignedByte(); // length
+
+                if (type == MSG_GPS || type == MSG_GPS_SENSORS) {
+
+                    Position position = new Position(getProtocolName());
+                    position.setDeviceId(deviceSession.getDeviceId());
+
+                    DateBuilder dateBuilder = new DateBuilder()
+                            .setDay(buf.readUnsignedByte())
+                            .setMonth(buf.getByte(buf.readerIndex()) & 0x0f)
+                            .setYear(2010 + (buf.readUnsignedByte() >> 4))
+                            .setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte());
+                    position.setTime(dateBuilder.getDate());
+
+                    double latitude = buf.readUnsignedByte();
+                    latitude += buf.readUnsignedByte() / 60.0;
+                    latitude += buf.readUnsignedByte() / 6000.0;
+                    latitude += buf.readUnsignedByte() / 600000.0;
+
+                    double longitude = buf.readUnsignedByte();
+                    longitude += buf.readUnsignedByte() / 60.0;
+                    longitude += buf.readUnsignedByte() / 6000.0;
+                    longitude += buf.readUnsignedByte() / 600000.0;
+
+                    int flags = buf.readUnsignedByte();
+                    if (BitUtil.check(flags, 0)) {
+                        latitude = -latitude;
+                    }
+                    if (BitUtil.check(flags, 1)) {
+                        longitude = -longitude;
+                    }
+                    position.setLatitude(latitude);
+                    position.setLongitude(longitude);
+
+                    int satellites = buf.readUnsignedByte();
+                    position.set(Position.KEY_SATELLITES, satellites);
+                    position.setValid(satellites >= 3);
+
+                    position.setSpeed(buf.readUnsignedByte());
+
+                    double course = buf.readUnsignedByte() << 1;
+                    course += (flags >> 2) & 1;
+                    course += buf.readUnsignedByte() / 100.0;
+                    position.setCourse(course);
+
+                    if (type == MSG_GPS_SENSORS) {
+                        double power = buf.readUnsignedByte();
+                        power += buf.readUnsignedByte() << 8;
+                        position.set(Position.KEY_POWER, power * 0.01);
+
+                        double battery = buf.readUnsignedByte();
+                        battery += buf.readUnsignedByte() << 8;
+                        position.set(Position.KEY_BATTERY, battery * 0.01);
+
+                        buf.skipBytes(6);
+                    }
+
+                    positions.add(position);
+
+                } else if (type == MSG_EVENTS) {
+
+                    buf.skipBytes(13);
+                }
+            }
+
+            return positions;
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/PretraceProtocol.java b/src/main/java/org/traccar/protocol/PretraceProtocol.java
new file mode 100644
index 000000000..f753cbdb4
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/PretraceProtocol.java
@@ -0,0 +1,44 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.CharacterDelimiterFrameDecoder;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+import org.traccar.model.Command;
+
+public class PretraceProtocol extends BaseProtocol {
+
+    public PretraceProtocol() {
+        setSupportedDataCommands(
+                Command.TYPE_CUSTOM,
+                Command.TYPE_POSITION_PERIODIC);
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, ')'));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new PretraceProtocolEncoder());
+                pipeline.addLast(new PretraceProtocolDecoder(PretraceProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/PretraceProtocolDecoder.java b/src/main/java/org/traccar/protocol/PretraceProtocolDecoder.java
new file mode 100644
index 000000000..a19384e62
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/PretraceProtocolDecoder.java
@@ -0,0 +1,132 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class PretraceProtocolDecoder extends BaseProtocolDecoder {
+
+    public PretraceProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("(")
+            .number("(d{15})")                   // imei
+            .number("Uddd")                      // type
+            .number("d")                         // gps type
+            .expression("([AV])")                // validity
+            .number("(dd)(dd)(dd)")              // date (yymmdd)
+            .number("(dd)(dd)(dd)")              // time (hhmmss)
+            .number("(dd)(dd.dddd)")             // latitude
+            .expression("([NS])")
+            .number("(ddd)(dd.dddd)")            // longitude
+            .expression("([EW])")
+            .number("(ddd)")                     // speed
+            .number("(ddd)")                     // course
+            .number("(xxx)")                     // altitude
+            .number("(x{8})")                    // odometer
+            .number("(x)")                       // satellites
+            .number("(dd)")                      // hdop
+            .number("(dd)")                      // gsm
+            .expression("(.{8}),&")              // state
+            .expression("(.+)?")                 // optional data
+            .text("^")
+            .number("xx")                        // checksum
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setValid(parser.next().equals("A"));
+
+        position.setTime(parser.nextDateTime());
+
+        position.setLatitude(parser.nextCoordinate());
+        position.setLongitude(parser.nextCoordinate());
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextInt(0)));
+        position.setCourse(parser.nextInt(0));
+        position.setAltitude(parser.nextHexInt(0));
+
+        position.set(Position.KEY_ODOMETER, parser.nextHexInt(0));
+        position.set(Position.KEY_SATELLITES, parser.nextHexInt(0));
+        position.set(Position.KEY_HDOP, parser.nextInt(0));
+        position.set(Position.KEY_RSSI, parser.nextInt(0));
+
+        parser.next(); // state
+
+        if (parser.hasNext()) {
+            for (String value : parser.next().split(",")) {
+                switch (value.charAt(0)) {
+                    case 'P':
+                        if (value.charAt(1) == '1') {
+                            if (value.charAt(4) == '%') {
+                                position.set(Position.KEY_BATTERY_LEVEL, Integer.parseInt(value.substring(2, 4)));
+                            } else {
+                                position.set(Position.KEY_BATTERY, Integer.parseInt(value.substring(2), 16) * 0.01);
+                            }
+                        } else {
+                            position.set(Position.KEY_POWER, Integer.parseInt(value.substring(2), 16) * 0.01);
+                        }
+                        break;
+                    case 'T':
+                        double temperature = Integer.parseInt(value.substring(2), 16) * 0.25;
+                        if (value.charAt(1) == '1') {
+                            position.set(Position.KEY_DEVICE_TEMP, temperature);
+                        } else {
+                            position.set(Position.PREFIX_TEMP + (value.charAt(1) - '0'), temperature);
+                        }
+                        break;
+                    case 'F':
+                        position.set("fuel" + (value.charAt(1) - '0'), Integer.parseInt(value.substring(2), 16) * 0.01);
+                        break;
+                    case 'R':
+                        position.set(Position.KEY_DRIVER_UNIQUE_ID, value.substring(3));
+                        break;
+                    default:
+                        break;
+                }
+            }
+        }
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/PretraceProtocolEncoder.java b/src/main/java/org/traccar/protocol/PretraceProtocolEncoder.java
new file mode 100644
index 000000000..9cf951e3b
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/PretraceProtocolEncoder.java
@@ -0,0 +1,46 @@
+/*
+ * Copyright 2015 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseProtocolEncoder;
+import org.traccar.Context;
+import org.traccar.helper.Checksum;
+import org.traccar.model.Command;
+
+public class PretraceProtocolEncoder extends BaseProtocolEncoder {
+
+    private String formatCommand(String uniqueId, String data) {
+        String content = uniqueId + data;
+        return String.format("(%s^%02X)", content, Checksum.xor(content));
+    }
+
+    @Override
+    protected Object encodeCommand(Command command) {
+
+        String uniqueId = Context.getIdentityManager().getById(command.getDeviceId()).getUniqueId();
+
+        switch (command.getType()) {
+            case Command.TYPE_CUSTOM:
+                return formatCommand(uniqueId, command.getString(Command.KEY_DATA));
+            case Command.TYPE_POSITION_PERIODIC:
+                return formatCommand(
+                        uniqueId, String.format("D221%1$d,%1$d,,", command.getInteger(Command.KEY_FREQUENCY)));
+            default:
+                return null;
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/PricolProtocol.java b/src/main/java/org/traccar/protocol/PricolProtocol.java
new file mode 100644
index 000000000..6821cd949
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/PricolProtocol.java
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.FixedLengthFrameDecoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class PricolProtocol extends BaseProtocol {
+
+    public PricolProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new FixedLengthFrameDecoder(64));
+                pipeline.addLast(new PricolProtocolDecoder(PricolProtocol.this));
+            }
+        });
+        addServer(new TrackerServer(true, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new PricolProtocolDecoder(PricolProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/PricolProtocolDecoder.java b/src/main/java/org/traccar/protocol/PricolProtocolDecoder.java
new file mode 100644
index 000000000..190c68258
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/PricolProtocolDecoder.java
@@ -0,0 +1,98 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+
+public class PricolProtocolDecoder extends BaseProtocolDecoder {
+
+    public PricolProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        buf.readUnsignedByte(); // header
+
+        DeviceSession deviceSession = getDeviceSession(
+                channel, remoteAddress, buf.readSlice(7).toString(StandardCharsets.US_ASCII));
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.set("eventType", buf.readUnsignedByte());
+        position.set("packetVersion", buf.readUnsignedByte());
+        position.set(Position.KEY_STATUS, buf.readUnsignedByte());
+        position.set(Position.KEY_RSSI, buf.readUnsignedByte());
+        position.set(Position.KEY_GPS, buf.readUnsignedByte());
+
+        position.setTime(new DateBuilder()
+                .setDateReverse(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte())
+                .setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte()).getDate());
+
+        position.setValid(true);
+
+        double lat = buf.getUnsignedShort(buf.readerIndex()) / 100;
+        lat += (buf.readUnsignedShort() % 100 * 10000 + buf.readUnsignedShort()) / 600000.0;
+        position.setLatitude(buf.readUnsignedByte() == 'S' ? -lat : lat);
+
+        double lon = buf.getUnsignedMedium(buf.readerIndex()) / 100;
+        lon += (buf.readUnsignedMedium() % 100 * 10000 + buf.readUnsignedShort()) / 600000.0;
+        position.setLongitude(buf.readUnsignedByte() == 'W' ? -lon : lon);
+
+        position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte()));
+
+        position.set(Position.KEY_INPUT, buf.readUnsignedShort());
+        position.set(Position.KEY_OUTPUT, buf.readUnsignedByte());
+
+        position.set("analogAlerts", buf.readUnsignedByte());
+        position.set("customAlertTypes", buf.readUnsignedShort());
+
+        for (int i = 1; i <= 5; i++) {
+            position.set(Position.PREFIX_ADC + i, buf.readUnsignedShort());
+        }
+
+        position.set(Position.KEY_ODOMETER, buf.readUnsignedMedium());
+        position.set(Position.KEY_RPM, buf.readUnsignedShort());
+
+        if (channel != null) {
+            channel.writeAndFlush(new NetworkMessage(
+                    Unpooled.copiedBuffer("ACK", StandardCharsets.US_ASCII), remoteAddress));
+        }
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/ProgressProtocol.java b/src/main/java/org/traccar/protocol/ProgressProtocol.java
new file mode 100644
index 000000000..aac84205d
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/ProgressProtocol.java
@@ -0,0 +1,36 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LengthFieldBasedFrameDecoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+import java.nio.ByteOrder;
+public class ProgressProtocol extends BaseProtocol {
+
+    public ProgressProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LengthFieldBasedFrameDecoder(ByteOrder.LITTLE_ENDIAN, 1024, 2, 2, 4, 0, true));
+                pipeline.addLast(new ProgressProtocolDecoder(ProgressProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/ProgressProtocolDecoder.java b/src/main/java/org/traccar/protocol/ProgressProtocolDecoder.java
new file mode 100644
index 000000000..0025cd9e7
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/ProgressProtocolDecoder.java
@@ -0,0 +1,172 @@
+/*
+ * Copyright 2012 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.ByteBufUtil;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.Date;
+import java.util.LinkedList;
+import java.util.List;
+
+public class ProgressProtocolDecoder extends BaseProtocolDecoder {
+
+    private long lastIndex;
+    private long newIndex;
+
+    public ProgressProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    public static final int MSG_NULL = 0;
+    public static final int MSG_IDENT = 1;
+    public static final int MSG_IDENT_FULL = 2;
+    public static final int MSG_POINT = 10;
+    public static final int MSG_LOG_SYNC = 100;
+    public static final int MSG_LOGMSG = 101;
+    public static final int MSG_TEXT = 102;
+    public static final int MSG_ALARM = 200;
+    public static final int MSG_ALARM_RECIEVED = 201;
+
+    private void requestArchive(Channel channel) {
+        if (lastIndex == 0) {
+            lastIndex = newIndex;
+        } else if (newIndex > lastIndex) {
+            ByteBuf request = Unpooled.buffer(12);
+            request.writeShortLE(MSG_LOG_SYNC);
+            request.writeShortLE(4);
+            request.writeIntLE((int) lastIndex);
+            request.writeIntLE(0);
+            channel.writeAndFlush(new NetworkMessage(request, channel.remoteAddress()));
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+        int type = buf.readUnsignedShortLE();
+        buf.readUnsignedShortLE(); // length
+
+        if (type == MSG_IDENT || type == MSG_IDENT_FULL) {
+
+            buf.readUnsignedIntLE(); // id
+            int length = buf.readUnsignedShortLE();
+            buf.skipBytes(length);
+            length = buf.readUnsignedShortLE();
+            buf.skipBytes(length);
+            length = buf.readUnsignedShortLE();
+            String imei = buf.readSlice(length).toString(StandardCharsets.US_ASCII);
+            getDeviceSession(channel, remoteAddress, imei);
+
+        } else if (type == MSG_POINT || type == MSG_ALARM || type == MSG_LOGMSG) {
+
+            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+            if (deviceSession == null) {
+                return null;
+            }
+
+            List<Position> positions = new LinkedList<>();
+
+            int recordCount = 1;
+            if (type == MSG_LOGMSG) {
+                recordCount = buf.readUnsignedShortLE();
+            }
+
+            for (int j = 0; j < recordCount; j++) {
+                Position position = new Position(getProtocolName());
+                position.setDeviceId(deviceSession.getDeviceId());
+
+                if (type == MSG_LOGMSG) {
+                    position.set(Position.KEY_ARCHIVE, true);
+                    int subtype = buf.readUnsignedShortLE();
+                    if (subtype == MSG_ALARM) {
+                        position.set(Position.KEY_ALARM, Position.ALARM_GENERAL);
+                    }
+                    if (buf.readUnsignedShortLE() > buf.readableBytes()) {
+                        lastIndex += 1;
+                        break; // workaround for device bug
+                    }
+                    lastIndex = buf.readUnsignedIntLE();
+                    position.set(Position.KEY_INDEX, lastIndex);
+                } else {
+                    newIndex = buf.readUnsignedIntLE();
+                }
+
+                position.setTime(new Date(buf.readUnsignedIntLE() * 1000));
+                position.setLatitude(buf.readIntLE() * 180.0 / 0x7FFFFFFF);
+                position.setLongitude(buf.readIntLE() * 180.0 / 0x7FFFFFFF);
+                position.setSpeed(buf.readUnsignedIntLE() * 0.01);
+                position.setCourse(buf.readUnsignedShortLE() * 0.01);
+                position.setAltitude(buf.readUnsignedShortLE() * 0.01);
+
+                int satellites = buf.readUnsignedByte();
+                position.setValid(satellites >= 3);
+                position.set(Position.KEY_SATELLITES, satellites);
+
+                position.set(Position.KEY_RSSI, buf.readUnsignedByte());
+                position.set(Position.KEY_ODOMETER, buf.readUnsignedIntLE());
+
+                long extraFlags = buf.readLongLE();
+
+                if (BitUtil.check(extraFlags, 0)) {
+                    int count = buf.readUnsignedShortLE();
+                    for (int i = 1; i <= count; i++) {
+                        position.set(Position.PREFIX_ADC + i, buf.readUnsignedShortLE());
+                    }
+                }
+
+                if (BitUtil.check(extraFlags, 1)) {
+                    int size = buf.readUnsignedShortLE();
+                    position.set("can", buf.toString(buf.readerIndex(), size, StandardCharsets.US_ASCII));
+                    buf.skipBytes(size);
+                }
+
+                if (BitUtil.check(extraFlags, 2)) {
+                    position.set("passenger", ByteBufUtil.hexDump(buf.readSlice(buf.readUnsignedShortLE())));
+                }
+
+                if (type == MSG_ALARM) {
+                    position.set(Position.KEY_ALARM, true);
+                    byte[] response = {(byte) 0xC9, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
+                    channel.writeAndFlush(new NetworkMessage(Unpooled.wrappedBuffer(response), remoteAddress));
+                }
+
+                buf.readUnsignedIntLE(); // crc
+
+                positions.add(position);
+            }
+
+            requestArchive(channel);
+
+            return positions;
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Pt3000Protocol.java b/src/main/java/org/traccar/protocol/Pt3000Protocol.java
new file mode 100644
index 000000000..1ad0026a3
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Pt3000Protocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.CharacterDelimiterFrameDecoder;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class Pt3000Protocol extends BaseProtocol {
+
+    public Pt3000Protocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, 'd')); // probably wrong
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new Pt3000ProtocolDecoder(Pt3000Protocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Pt3000ProtocolDecoder.java b/src/main/java/org/traccar/protocol/Pt3000ProtocolDecoder.java
new file mode 100644
index 000000000..e7f9e062a
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Pt3000ProtocolDecoder.java
@@ -0,0 +1,83 @@
+/*
+ * Copyright 2013 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class Pt3000ProtocolDecoder extends BaseProtocolDecoder {
+
+    public Pt3000ProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .number("%(d+),")                    // imei
+            .text("$GPRMC,")
+            .number("(dd)(dd)(dd).?d*,")         // time (hhmmss)
+            .expression("([AV]),")               // validity
+            .number("(dd)(dd.d+),")              // latitude
+            .expression("([NS]),")
+            .number("(ddd)(dd.d+),")             // longitude
+            .expression("([EW]),")
+            .number("(d+.?d*)?,")                // speed
+            .number("(d+.?d*)?,")                // course
+            .number("(dd)(dd)(dd)")              // date (ddmmyy)
+            .any()
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        DateBuilder dateBuilder = new DateBuilder()
+                .setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+
+        position.setValid(parser.next().equals("A"));
+        position.setLatitude(parser.nextCoordinate());
+        position.setLongitude(parser.nextCoordinate());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
+
+        dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+        position.setTime(dateBuilder.getDate());
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Pt502FrameDecoder.java b/src/main/java/org/traccar/protocol/Pt502FrameDecoder.java
new file mode 100644
index 000000000..316cd987f
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Pt502FrameDecoder.java
@@ -0,0 +1,73 @@
+/*
+ * Copyright 2014 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+import org.traccar.BaseFrameDecoder;
+
+import java.nio.charset.StandardCharsets;
+
+public class Pt502FrameDecoder extends BaseFrameDecoder {
+
+    private static final int BINARY_HEADER = 5;
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+        if (buf.readableBytes() < 10) {
+            return null;
+        }
+
+        if (buf.getUnsignedByte(buf.readerIndex()) == 0xbf
+                && buf.toString(buf.readerIndex() + BINARY_HEADER, 4, StandardCharsets.US_ASCII).equals("$PHD")) {
+
+            int length = buf.getUnsignedShortLE(buf.readerIndex() + 3);
+            if (buf.readableBytes() >= length) {
+                buf.skipBytes(BINARY_HEADER);
+                ByteBuf result = buf.readRetainedSlice(length - BINARY_HEADER - 2);
+                buf.skipBytes(2); // line break
+                return result;
+            }
+
+        } else {
+
+            if (buf.getUnsignedByte(buf.readerIndex()) == 0xbf) {
+                buf.skipBytes(BINARY_HEADER);
+            }
+
+            int index = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '\r');
+            if (index < 0) {
+                index = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '\n');
+            }
+
+            if (index > 0) {
+                ByteBuf result = buf.readRetainedSlice(index - buf.readerIndex());
+                while (buf.isReadable()
+                        && (buf.getByte(buf.readerIndex()) == '\r' || buf.getByte(buf.readerIndex()) == '\n')) {
+                    buf.skipBytes(1);
+                }
+                return result;
+            }
+
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Pt502Protocol.java b/src/main/java/org/traccar/protocol/Pt502Protocol.java
new file mode 100644
index 000000000..5afb9451d
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Pt502Protocol.java
@@ -0,0 +1,44 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+import org.traccar.model.Command;
+
+public class Pt502Protocol extends BaseProtocol {
+
+    public Pt502Protocol() {
+        setSupportedDataCommands(
+                Command.TYPE_CUSTOM,
+                Command.TYPE_SET_TIMEZONE,
+                Command.TYPE_ALARM_SPEED,
+                Command.TYPE_OUTPUT_CONTROL,
+                Command.TYPE_REQUEST_PHOTO);
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new Pt502FrameDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new Pt502ProtocolEncoder());
+                pipeline.addLast(new Pt502ProtocolDecoder(Pt502Protocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Pt502ProtocolDecoder.java b/src/main/java/org/traccar/protocol/Pt502ProtocolDecoder.java
new file mode 100644
index 000000000..0afec67ad
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Pt502ProtocolDecoder.java
@@ -0,0 +1,212 @@
+/*
+ * Copyright 2012 - 2018 Anton Tananaev (anton@traccar.org)
+ * Copyright 2012 Luis Parada (luis.parada@gmail.com)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.Context;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.regex.Pattern;
+
+public class Pt502ProtocolDecoder extends BaseProtocolDecoder {
+
+    private static final int MAX_CHUNK_SIZE = 960;
+
+    private ByteBuf photo;
+
+    public Pt502ProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .any().text("$")
+            .expression("([^,]+),")              // type
+            .number("(d+),")                     // id
+            .number("(dd)(dd)(dd).(ddd),")       // time (hhmmss.sss)
+            .expression("([AV]),")               // validity
+            .number("(d+)(dd.dddd),")            // latitude
+            .expression("([NS]),")
+            .number("(d+)(dd.dddd),")            // longitude
+            .expression("([EW]),")
+            .number("(d+.d+)?,")                 // speed
+            .number("(d+.d+)?,")                 // course
+            .number("(dd)(dd)(dd),,,")           // date (ddmmyy)
+            .expression("./")
+            .expression("([01])+,")              // input
+            .expression("([01])+/")              // output
+            .expression("([^/]+)?/")             // adc
+            .number("(d+)")                      // odometer
+            .expression("/([^/]+)?/")            // rfid
+            .number("(xxx)").optional(2)         // state
+            .any()
+            .compile();
+
+    private String decodeAlarm(String value) {
+        switch (value) {
+            case "IN1":
+                return Position.ALARM_SOS;
+            case "GOF":
+                return Position.ALARM_GEOFENCE;
+            case "TOW":
+                return Position.ALARM_TOW;
+            case "HDA":
+                return Position.ALARM_ACCELERATION;
+            case "HDB":
+                return Position.ALARM_BRAKING;
+            case "FDA":
+                return Position.ALARM_FATIGUE_DRIVING;
+            case "SKA":
+                return Position.ALARM_VIBRATION;
+            case "PMA":
+                return Position.ALARM_MOVEMENT;
+            case "CPA":
+                return Position.ALARM_POWER_CUT;
+            default:
+                return null;
+        }
+    }
+
+    private Position decodePosition(Channel channel, SocketAddress remoteAddress, String sentence) {
+
+        Parser parser = new Parser(PATTERN, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.set(Position.KEY_ALARM, decodeAlarm(parser.next()));
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        DateBuilder dateBuilder = new DateBuilder()
+                .setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+
+        position.setValid(parser.next().equals("A"));
+        position.setLatitude(parser.nextCoordinate());
+        position.setLongitude(parser.nextCoordinate());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
+
+        dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+        position.setTime(dateBuilder.getDate());
+
+        position.set(Position.KEY_INPUT, parser.next());
+        position.set(Position.KEY_OUTPUT, parser.next());
+
+        if (parser.hasNext()) {
+            String[] values = parser.next().split(",");
+            for (int i = 0; i < values.length; i++) {
+                position.set(Position.PREFIX_ADC + (i + 1), Integer.parseInt(values[i], 16));
+            }
+        }
+
+        position.set(Position.KEY_ODOMETER, parser.nextInt(0));
+        position.set(Position.KEY_DRIVER_UNIQUE_ID, parser.next());
+
+        if (parser.hasNext()) {
+            int value = parser.nextHexInt(0);
+            position.set(Position.KEY_BATTERY, value >> 8);
+            position.set(Position.KEY_RSSI, (value >> 4) & 0xf);
+            position.set(Position.KEY_SATELLITES, value & 0xf);
+        }
+
+        return position;
+    }
+
+    private void requestPhotoFragment(Channel channel) {
+        if (channel != null) {
+            int offset = photo.writerIndex();
+            int size = Math.min(photo.writableBytes(), MAX_CHUNK_SIZE);
+            channel.writeAndFlush(new NetworkMessage("#PHD" + offset + "," + size + "\r\n", channel.remoteAddress()));
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        int typeEndIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) ',');
+        String type = buf.toString(buf.readerIndex(), typeEndIndex - buf.readerIndex(), StandardCharsets.US_ASCII);
+
+        if (type.startsWith("$PHD")) {
+
+            int dataIndex = buf.indexOf(typeEndIndex + 1, buf.writerIndex(), (byte) ',') + 1;
+            buf.readerIndex(dataIndex);
+
+            if (photo != null) {
+
+                photo.writeBytes(buf.readSlice(buf.readableBytes()));
+
+                if (photo.writableBytes() > 0) {
+
+                    requestPhotoFragment(channel);
+
+                } else {
+
+                    DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+                    String uniqueId = Context.getIdentityManager().getById(deviceSession.getDeviceId()).getUniqueId();
+
+                    Position position = new Position(getProtocolName());
+                    position.setDeviceId(deviceSession.getDeviceId());
+
+                    getLastLocation(position, null);
+
+                    position.set(Position.KEY_IMAGE, Context.getMediaManager().writeFile(uniqueId, photo, "jpg"));
+                    photo.release();
+                    photo = null;
+
+                    return position;
+
+                }
+
+            }
+
+        } else {
+
+            if (type.startsWith("$PHO")) {
+                int size = Integer.parseInt(type.split("-")[0].substring(4));
+                if (size > 0) {
+                    photo = Unpooled.buffer(size);
+                    requestPhotoFragment(channel);
+                }
+            }
+
+            return decodePosition(channel, remoteAddress, buf.toString(StandardCharsets.US_ASCII));
+
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Pt502ProtocolEncoder.java b/src/main/java/org/traccar/protocol/Pt502ProtocolEncoder.java
new file mode 100644
index 000000000..ed18208cc
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Pt502ProtocolEncoder.java
@@ -0,0 +1,58 @@
+/*
+ * Copyright 2016 - 2017 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import java.util.TimeZone;
+
+import org.traccar.StringProtocolEncoder;
+import org.traccar.model.Command;
+
+public class Pt502ProtocolEncoder extends StringProtocolEncoder implements StringProtocolEncoder.ValueFormatter {
+
+    @Override
+    public String formatValue(String key, Object value) {
+        if (key.equals(Command.KEY_TIMEZONE)) {
+            return String.valueOf(TimeZone.getTimeZone((String) value).getRawOffset() / 3600000);
+        }
+
+        return null;
+    }
+
+    @Override
+    protected String formatCommand(Command command, String format, String... keys) {
+        return formatCommand(command, format, this, keys);
+    }
+
+    @Override
+    protected Object encodeCommand(Command command) {
+
+        switch (command.getType()) {
+            case Command.TYPE_CUSTOM:
+                return formatCommand(command, "{%s}\r\n", Command.KEY_DATA);
+            case Command.TYPE_OUTPUT_CONTROL:
+                return formatCommand(command, "#OPC{%s},{%s}\r\n", Command.KEY_INDEX, Command.KEY_DATA);
+            case Command.TYPE_SET_TIMEZONE:
+                return formatCommand(command, "#TMZ{%s}\r\n", Command.KEY_TIMEZONE);
+            case Command.TYPE_ALARM_SPEED:
+                return formatCommand(command, "#SPD{%s}\r\n", Command.KEY_DATA);
+            case Command.TYPE_REQUEST_PHOTO:
+                return formatCommand(command, "#PHO\r\n");
+            default:
+                return null;
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Pt60Protocol.java b/src/main/java/org/traccar/protocol/Pt60Protocol.java
new file mode 100644
index 000000000..c502426c5
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Pt60Protocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.CharacterDelimiterFrameDecoder;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class Pt60Protocol extends BaseProtocol {
+
+    public Pt60Protocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, "@R#@", "@E#@"));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new Pt60ProtocolDecoder(Pt60Protocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Pt60ProtocolDecoder.java b/src/main/java/org/traccar/protocol/Pt60ProtocolDecoder.java
new file mode 100644
index 000000000..6a3fe2734
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Pt60ProtocolDecoder.java
@@ -0,0 +1,184 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.CellTower;
+import org.traccar.model.Network;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.regex.Pattern;
+
+public class Pt60ProtocolDecoder extends BaseProtocolDecoder {
+
+    public Pt60ProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    public static final int MSG_G_TRACK = 6;
+    public static final int MSG_G_STEP_COUNT = 13;
+    public static final int MSG_G_HEART_RATE = 14;
+
+    public static final int MSG_B_POSITION = 1;
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .expression("@(.)#@[,|]")            // header
+            .number("V?dd[,|]")                  // protocol version
+            .number("(d+)[,|]")                  // type
+            .number("(d+)[,|]")                  // imei
+            .number("d+[,|]")                    // imsi
+            .groupBegin()
+            .expression("[^,|]+[,|]").optional() // firmware version
+            .number("[01][,|]")                  // state
+            .number("d+[,|]")                    // battery
+            .groupEnd("?")
+            .number("(dddd)(dd)(dd)")            // date (yyyymmdd)
+            .number("(dd)(dd)(dd)[,|]")          // time (hhmmss)
+            .expression("(.*)")                  // data
+            .expression("[,|]")
+            .compile();
+
+    private void sendResponse(Channel channel, SocketAddress remoteAddress, String format, int type, String imei) {
+        if (channel != null) {
+            String message;
+            String time = new SimpleDateFormat("yyyyMMddHHmmss").format(new Date());
+            if (format.equals("G")) {
+                message = String.format("@G#@,V01,38,%s,@R#@", time);
+            } else {
+                message = String.format("@B#@|01|%03d|%s|0|%s|@E#@", type + 1, imei, time);
+            }
+            channel.writeAndFlush(new NetworkMessage(message, remoteAddress));
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        String format = parser.next();
+        int type = parser.nextInt();
+        String imei = parser.next();
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        sendResponse(channel, remoteAddress, format, type, imei);
+
+        if (format.equals("G")) {
+
+            if (type != MSG_G_TRACK && type != MSG_G_STEP_COUNT && type != MSG_G_HEART_RATE) {
+                return null;
+            }
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+            position.setDeviceTime(parser.nextDateTime());
+
+            String[] values = parser.next().split(",");
+
+            if (type == MSG_G_TRACK) {
+
+                position.setValid(true);
+                position.setFixTime(position.getDeviceTime());
+
+                String[] coordinates = values[0].split(";");
+                position.setLatitude(Double.parseDouble(coordinates[0]));
+                position.setLongitude(Double.parseDouble(coordinates[1]));
+
+            } else {
+
+                getLastLocation(position, position.getDeviceTime());
+
+                switch (type) {
+                    case MSG_G_STEP_COUNT:
+                        position.set(Position.KEY_STEPS, Integer.parseInt(values[0]));
+                        break;
+                    case MSG_G_HEART_RATE:
+                        position.set(Position.KEY_HEART_RATE, Integer.parseInt(values[0]));
+                        position.set(Position.KEY_BATTERY, Integer.parseInt(values[1]));
+                        break;
+                    default:
+                        break;
+                }
+
+            }
+
+            return position;
+
+        } else {
+
+            if (type != MSG_B_POSITION) {
+                return null;
+            }
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+            position.setDeviceTime(parser.nextDateTime());
+
+            String[] values = parser.next().split("\\|");
+
+            if (Integer.parseInt(values[values.length - 1]) == 2) {
+
+                getLastLocation(position, position.getDeviceTime());
+
+                Network network = new Network();
+
+                for (int i = 0; i < values.length - 1; i++) {
+                    String[] cellValues = values[i].split(",");
+                    CellTower tower = new CellTower();
+                    tower.setCellId(Long.parseLong(cellValues[0]));
+                    tower.setLocationAreaCode(Integer.parseInt(cellValues[1]));
+                    tower.setMobileNetworkCode(Integer.parseInt(cellValues[2]));
+                    tower.setMobileCountryCode(Integer.parseInt(cellValues[3]));
+                    tower.setSignalStrength(Integer.parseInt(cellValues[4]));
+                    network.addCellTower(tower);
+                }
+
+                position.setNetwork(network);
+
+
+            } else {
+
+                position.setValid(true);
+                position.setFixTime(position.getDeviceTime());
+
+                position.setLatitude(Double.parseDouble(values[0]));
+                position.setLongitude(Double.parseDouble(values[1]));
+
+            }
+
+            return position;
+
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/RaveonProtocol.java b/src/main/java/org/traccar/protocol/RaveonProtocol.java
new file mode 100644
index 000000000..44faadb3b
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/RaveonProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LineBasedFrameDecoder;
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class RaveonProtocol extends BaseProtocol {
+
+    public RaveonProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LineBasedFrameDecoder(1024));
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new RaveonProtocolDecoder(RaveonProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/RaveonProtocolDecoder.java b/src/main/java/org/traccar/protocol/RaveonProtocolDecoder.java
new file mode 100644
index 000000000..50acd20a1
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/RaveonProtocolDecoder.java
@@ -0,0 +1,99 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class RaveonProtocolDecoder extends BaseProtocolDecoder {
+
+    public RaveonProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("$PRAVE,")
+            .number("(d+),")                     // id
+            .number("d+,")
+            .number("(-?)(d+)(dd.d+),")          // latitude
+            .number("(-?)(d+)(dd.d+),")          // longitude
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .number("(d),")                      // validity
+            .number("(d+),")                     // satellites
+            .number("(-?d+),")                   // altitude
+            .number("(-?d+),")                   // temperature
+            .number("(d+.d+),")                  // power
+            .number("(d+),")                     // inputs
+            .number("(-?d+),")                   // gsm
+            .number("(d+),")                     // speed
+            .number("(d+),")                     // course
+            .expression("([PMACIVSX])?,")        // status
+            .any()
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        String sentence = (String) msg;
+
+        Parser parser = new Parser(PATTERN, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN));
+        position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN));
+
+        position.setTime(parser.nextDateTime(Parser.DateTimeFormat.HMS));
+
+        position.setValid(parser.nextInt(0) != 0);
+
+        position.set(Position.KEY_SATELLITES, parser.nextInt(0));
+
+        position.setAltitude(parser.nextInt(0));
+
+        position.set(Position.PREFIX_TEMP + 1, parser.nextInt(0));
+        position.set(Position.KEY_POWER, parser.nextDouble(0));
+        position.set(Position.KEY_INPUT, parser.nextInt(0));
+        position.set(Position.KEY_RSSI, parser.nextInt(0));
+
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextInt(0)));
+        position.setCourse(parser.nextInt(0));
+
+        position.set(Position.KEY_ALARM, parser.next());
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/RecodaProtocol.java b/src/main/java/org/traccar/protocol/RecodaProtocol.java
new file mode 100644
index 000000000..0bc9870bc
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/RecodaProtocol.java
@@ -0,0 +1,36 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LengthFieldBasedFrameDecoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+import java.nio.ByteOrder;
+public class RecodaProtocol extends BaseProtocol {
+
+    public RecodaProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LengthFieldBasedFrameDecoder(ByteOrder.LITTLE_ENDIAN, 1024, 4, 4, -8, 0, true));
+                pipeline.addLast(new RecodaProtocolDecoder(RecodaProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/RecodaProtocolDecoder.java b/src/main/java/org/traccar/protocol/RecodaProtocolDecoder.java
new file mode 100644
index 000000000..04098225f
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/RecodaProtocolDecoder.java
@@ -0,0 +1,110 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.Date;
+
+public class RecodaProtocolDecoder extends BaseProtocolDecoder {
+
+    public RecodaProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    public static final int MSG_HEARTBEAT = 0x00001001;
+    public static final int MSG_REQUEST_RESPONSE = 0x20000001;
+    public static final int MSG_SIGNAL_LINK_REGISTRATION = 0x20001001;
+    public static final int MSG_EVENT_NOTICE = 0x20002001;
+    public static final int MSG_GPS_DATA = 0x20001011;
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        int type = buf.readIntLE();
+        buf.readUnsignedIntLE(); // length
+
+        if (type != MSG_HEARTBEAT) {
+            buf.readUnsignedShortLE(); // version
+            buf.readUnsignedShortLE(); // index
+        }
+
+        if (type == MSG_SIGNAL_LINK_REGISTRATION) {
+
+            getDeviceSession(channel, remoteAddress, buf.readSlice(12).toString(StandardCharsets.US_ASCII));
+
+        } else if (type == MSG_GPS_DATA) {
+
+            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+            if (deviceSession == null) {
+                return null;
+            }
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            position.setTime(new Date(buf.readLongLE()));
+
+            int flags = buf.readUnsignedByte();
+
+            if (BitUtil.check(flags, 0)) {
+
+                buf.readUnsignedShortLE(); // declination
+
+                position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShortLE()));
+
+                position.setLongitude(buf.readUnsignedByte() + buf.readUnsignedByte() / 60.0);
+                position.setLatitude(buf.readUnsignedByte() + buf.readUnsignedByte() / 60.0);
+
+                position.setLongitude(position.getLongitude() + buf.readUnsignedIntLE() / 3600.0);
+                position.setLatitude(position.getLatitude() + buf.readUnsignedIntLE() / 3600.0);
+
+                int status = buf.readUnsignedByte();
+
+                position.setValid(BitUtil.check(status, 0));
+                if (BitUtil.check(status, 1)) {
+                    position.setLongitude(-position.getLongitude());
+                }
+                if (!BitUtil.check(status, 2)) {
+                    position.setLatitude(-position.getLatitude());
+                }
+
+            } else {
+
+                getLastLocation(position, position.getDeviceTime());
+
+            }
+
+            return position;
+
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/RetranslatorFrameDecoder.java b/src/main/java/org/traccar/protocol/RetranslatorFrameDecoder.java
new file mode 100644
index 000000000..4edd09418
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/RetranslatorFrameDecoder.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+import org.traccar.BaseFrameDecoder;
+
+public class RetranslatorFrameDecoder extends BaseFrameDecoder {
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+        int length = 4 + buf.getIntLE(buf.readerIndex());
+        if (buf.readableBytes() >= length) {
+            return buf.readRetainedSlice(length);
+        } else {
+            return null;
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/RetranslatorProtocol.java b/src/main/java/org/traccar/protocol/RetranslatorProtocol.java
new file mode 100644
index 000000000..fae81f7d2
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/RetranslatorProtocol.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class RetranslatorProtocol extends BaseProtocol {
+
+    public RetranslatorProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new RetranslatorFrameDecoder());
+                pipeline.addLast(new RetranslatorProtocolDecoder(RetranslatorProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/RetranslatorProtocolDecoder.java b/src/main/java/org/traccar/protocol/RetranslatorProtocolDecoder.java
new file mode 100644
index 000000000..0688c9b0e
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/RetranslatorProtocolDecoder.java
@@ -0,0 +1,114 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.Date;
+
+public class RetranslatorProtocolDecoder extends BaseProtocolDecoder {
+
+    public RetranslatorProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        if (channel != null) {
+            channel.writeAndFlush(new NetworkMessage(Unpooled.wrappedBuffer(new byte[]{0x11}), remoteAddress));
+        }
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        buf.readUnsignedInt(); // length
+
+        int idLength = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) 0x00) - buf.readerIndex();
+        String id = buf.readBytes(idLength).toString(StandardCharsets.US_ASCII);
+        buf.readByte();
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, id);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+        position.setTime(new Date(buf.readUnsignedInt() * 1000));
+
+        buf.readUnsignedInt(); // bit flags
+
+        while (buf.isReadable()) {
+
+            buf.readUnsignedShort(); // block type
+            int blockEnd = buf.readInt() + buf.readerIndex();
+            buf.readUnsignedByte(); // security attribute
+            int dataType = buf.readUnsignedByte();
+
+            int nameLength = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) 0x00) - buf.readerIndex();
+            String name = buf.readBytes(nameLength).toString(StandardCharsets.US_ASCII);
+            buf.readByte();
+
+            if (name.equals("posinfo")) {
+                position.setValid(true);
+                position.setLongitude(buf.readDoubleLE());
+                position.setLatitude(buf.readDoubleLE());
+                position.setAltitude(buf.readDoubleLE());
+                position.setSpeed(buf.readShort());
+                position.setCourse(buf.readShort());
+                position.set(Position.KEY_SATELLITES, buf.readByte());
+            } else {
+                switch (dataType) {
+                    case 1:
+                        int len = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) 0x00) - buf.readerIndex();
+                        position.set(name, buf.readBytes(len).toString(StandardCharsets.US_ASCII));
+                        buf.readByte();
+                        break;
+                    case 3:
+                        position.set(name, buf.readInt());
+                        break;
+                    case 4:
+                        position.set(name, buf.readDoubleLE());
+                        break;
+                    case 5:
+                        position.set(name, buf.readLong());
+                        break;
+                    default:
+                        break;
+                }
+            }
+
+            buf.readerIndex(blockEnd);
+
+        }
+
+        if (position.getLatitude() == 0 && position.getLongitude() == 0) {
+            getLastLocation(position, position.getDeviceTime());
+        }
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/RitiProtocol.java b/src/main/java/org/traccar/protocol/RitiProtocol.java
new file mode 100644
index 000000000..de1026672
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/RitiProtocol.java
@@ -0,0 +1,36 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LengthFieldBasedFrameDecoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+import java.nio.ByteOrder;
+public class RitiProtocol extends BaseProtocol {
+
+    public RitiProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LengthFieldBasedFrameDecoder(ByteOrder.LITTLE_ENDIAN, 1024, 105, 2, 3, 0, true));
+                pipeline.addLast(new RitiProtocolDecoder(RitiProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/RitiProtocolDecoder.java b/src/main/java/org/traccar/protocol/RitiProtocolDecoder.java
new file mode 100644
index 000000000..46267ca90
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/RitiProtocolDecoder.java
@@ -0,0 +1,102 @@
+/*
+ * Copyright 2014 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.regex.Pattern;
+
+public class RitiProtocolDecoder extends BaseProtocolDecoder {
+
+    public RitiProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("$GPRMC,")
+            .number("(dd)(dd)(dd).?d*,")         // time (hhmmss)
+            .expression("([AV]),")               // validity
+            .number("(dd)(dd.d+),")              // latitude
+            .expression("([NS]),")
+            .number("(ddd)(dd.d+),")             // longitude
+            .expression("([EW]),")
+            .number("(d+.?d*)?,")                // speed
+            .number("(d+.?d*)?,")                // course
+            .number("(dd)(dd)(dd)")              // date (ddmmyy)
+            .any()
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        buf.skipBytes(2); // header
+
+        Position position = new Position(getProtocolName());
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, String.valueOf(buf.readUnsignedShort()));
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.set("mode", buf.readUnsignedByte());
+        position.set(Position.KEY_COMMAND, buf.readUnsignedByte());
+        position.set(Position.KEY_POWER, buf.readUnsignedShortLE() * 0.001);
+
+        buf.skipBytes(5);  // status
+        buf.readUnsignedShortLE();  // idleCount
+        buf.readUnsignedShortLE();  // idleTime in seconds
+
+        position.set(Position.KEY_DISTANCE, buf.readUnsignedIntLE());
+        position.set(Position.KEY_ODOMETER_TRIP, buf.readUnsignedIntLE());
+
+        // Parse GPRMC
+        int end = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '*');
+        String gprmc = buf.toString(buf.readerIndex(), end - buf.readerIndex(), StandardCharsets.US_ASCII);
+        Parser parser = new Parser(PATTERN, gprmc);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DateBuilder dateBuilder = new DateBuilder()
+                .setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+
+        position.setValid(parser.next().equals("A"));
+        position.setLatitude(parser.nextCoordinate());
+        position.setLongitude(parser.nextCoordinate());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
+
+        dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+        position.setTime(dateBuilder.getDate());
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/RoboTrackFrameDecoder.java b/src/main/java/org/traccar/protocol/RoboTrackFrameDecoder.java
new file mode 100644
index 000000000..85ed6c76f
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/RoboTrackFrameDecoder.java
@@ -0,0 +1,57 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+import org.traccar.BaseFrameDecoder;
+
+public class RoboTrackFrameDecoder extends BaseFrameDecoder {
+
+    private int messageLength(ByteBuf buf) {
+        switch (buf.getUnsignedByte(buf.readerIndex())) {
+            case RoboTrackProtocolDecoder.MSG_ID:
+                return 69;
+            case RoboTrackProtocolDecoder.MSG_ACK:
+                return 3;
+            case RoboTrackProtocolDecoder.MSG_GPS:
+            case RoboTrackProtocolDecoder.MSG_GSM:
+            case RoboTrackProtocolDecoder.MSG_IMAGE_START:
+                return 24;
+            case RoboTrackProtocolDecoder.MSG_IMAGE_DATA:
+                return 8 + buf.getUnsignedShortLE(buf.readerIndex() + 1);
+            case RoboTrackProtocolDecoder.MSG_IMAGE_END:
+                return 6;
+            default:
+                return Integer.MAX_VALUE;
+        }
+    }
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+        int length = messageLength(buf);
+
+        if (buf.readableBytes() >= length) {
+            return buf.readRetainedSlice(length);
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/RoboTrackProtocol.java b/src/main/java/org/traccar/protocol/RoboTrackProtocol.java
new file mode 100644
index 000000000..c2c531293
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/RoboTrackProtocol.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class RoboTrackProtocol extends BaseProtocol {
+
+    public RoboTrackProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new RoboTrackFrameDecoder());
+                pipeline.addLast(new RoboTrackProtocolDecoder(RoboTrackProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/RoboTrackProtocolDecoder.java b/src/main/java/org/traccar/protocol/RoboTrackProtocolDecoder.java
new file mode 100644
index 000000000..b613f31d7
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/RoboTrackProtocolDecoder.java
@@ -0,0 +1,131 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.CellTower;
+import org.traccar.model.Network;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.Date;
+
+public class RoboTrackProtocolDecoder extends BaseProtocolDecoder {
+
+    public RoboTrackProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    public static final int MSG_ID = 0x00;
+    public static final int MSG_ACK = 0x80;
+    public static final int MSG_GPS = 0x03;
+    public static final int MSG_GSM = 0x04;
+    public static final int MSG_IMAGE_START = 0x06;
+    public static final int MSG_IMAGE_DATA = 0x07;
+    public static final int MSG_IMAGE_END = 0x08;
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        int type = buf.readUnsignedByte();
+
+        if (type == MSG_ID) {
+
+            buf.skipBytes(16); // name
+
+            String imei = buf.readSlice(15).toString(StandardCharsets.US_ASCII);
+
+            if (getDeviceSession(channel, remoteAddress, imei) != null && channel != null) {
+                ByteBuf response = Unpooled.buffer();
+                response.writeByte(MSG_ACK);
+                response.writeByte(0x01); // success
+                response.writeByte(0x66); // checksum
+                channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
+            }
+
+        } else if (type == MSG_GPS || type == MSG_GSM) {
+
+            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+            if (deviceSession == null) {
+                return null;
+            }
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            position.setDeviceTime(new Date(buf.readUnsignedIntLE() * 1000));
+
+            if (type == MSG_GPS) {
+
+                position.setValid(true);
+                position.setFixTime(position.getDeviceTime());
+                position.setLatitude(buf.readIntLE() * 0.000001);
+                position.setLongitude(buf.readIntLE() * 0.000001);
+                position.setSpeed(UnitsConverter.knotsFromKph(buf.readByte()));
+
+            } else {
+
+                getLastLocation(position, position.getDeviceTime());
+
+                position.setNetwork(new Network(CellTower.from(
+                        buf.readUnsignedShortLE(), buf.readUnsignedShortLE(),
+                        buf.readUnsignedShortLE(), buf.readUnsignedShortLE())));
+
+                buf.readUnsignedByte(); // reserved
+
+            }
+
+            int value = buf.readUnsignedByte();
+
+            position.set(Position.KEY_SATELLITES, BitUtil.to(value, 4));
+            position.set(Position.KEY_RSSI, BitUtil.between(value, 4, 7));
+            position.set(Position.KEY_MOTION, BitUtil.check(value, 7));
+
+            value = buf.readUnsignedByte();
+
+            position.set(Position.KEY_CHARGE, BitUtil.check(value, 0));
+
+            for (int i = 1; i <= 4; i++) {
+                position.set(Position.PREFIX_IN + i, BitUtil.check(value, i));
+            }
+
+            position.set(Position.KEY_BATTERY_LEVEL, BitUtil.from(value, 5) * 100 / 7);
+            position.set(Position.KEY_DEVICE_TEMP, buf.readByte());
+
+            for (int i = 1; i <= 3; i++) {
+                position.set(Position.PREFIX_ADC + i, buf.readUnsignedShortLE());
+            }
+
+            return position;
+
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/RuptelaProtocol.java b/src/main/java/org/traccar/protocol/RuptelaProtocol.java
new file mode 100644
index 000000000..1ac62570a
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/RuptelaProtocol.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LengthFieldBasedFrameDecoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+import org.traccar.model.Command;
+
+public class RuptelaProtocol extends BaseProtocol {
+
+    public RuptelaProtocol() {
+        setSupportedDataCommands(
+                Command.TYPE_CUSTOM,
+                Command.TYPE_CONFIGURATION,
+                Command.TYPE_GET_VERSION,
+                Command.TYPE_FIRMWARE_UPDATE,
+                Command.TYPE_OUTPUT_CONTROL,
+                Command.TYPE_SET_CONNECTION,
+                Command.TYPE_SET_ODOMETER);
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LengthFieldBasedFrameDecoder(1024, 0, 2, 2, 0));
+                pipeline.addLast(new RuptelaProtocolEncoder());
+                pipeline.addLast(new RuptelaProtocolDecoder(RuptelaProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/RuptelaProtocolDecoder.java b/src/main/java/org/traccar/protocol/RuptelaProtocolDecoder.java
new file mode 100644
index 000000000..b043b6201
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/RuptelaProtocolDecoder.java
@@ -0,0 +1,248 @@
+/*
+ * Copyright 2013 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.DataConverter;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.Date;
+import java.util.LinkedList;
+import java.util.List;
+
+public class RuptelaProtocolDecoder extends BaseProtocolDecoder {
+
+    public RuptelaProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    public static final int MSG_RECORDS = 1;
+    public static final int MSG_DEVICE_CONFIGURATION = 2;
+    public static final int MSG_DEVICE_VERSION = 3;
+    public static final int MSG_FIRMWARE_UPDATE = 4;
+    public static final int MSG_SET_CONNECTION = 5;
+    public static final int MSG_SET_ODOMETER = 6;
+    public static final int MSG_SMS_VIA_GPRS_RESPONSE = 7;
+    public static final int MSG_SMS_VIA_GPRS = 8;
+    public static final int MSG_DTCS = 9;
+    public static final int MSG_SET_IO = 17;
+    public static final int MSG_EXTENDED_RECORDS = 68;
+
+    private Position decodeCommandResponse(DeviceSession deviceSession, int type, ByteBuf buf) {
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        getLastLocation(position, null);
+
+        position.set(Position.KEY_TYPE, type);
+
+        switch (type) {
+            case MSG_DEVICE_CONFIGURATION:
+            case MSG_DEVICE_VERSION:
+            case MSG_FIRMWARE_UPDATE:
+            case MSG_SMS_VIA_GPRS_RESPONSE:
+                position.set(Position.KEY_RESULT,
+                        buf.toString(buf.readerIndex(), buf.readableBytes() - 2, StandardCharsets.US_ASCII).trim());
+                return position;
+            case MSG_SET_IO:
+                position.set(Position.KEY_RESULT,
+                        String.valueOf(buf.readUnsignedByte()));
+                return position;
+            default:
+                return null;
+        }
+    }
+
+    private long readValue(ByteBuf buf, int length, boolean signed) {
+        switch (length) {
+            case 1:
+                return signed ? buf.readByte() : buf.readUnsignedByte();
+            case 2:
+                return signed ? buf.readShort() : buf.readUnsignedShort();
+            case 4:
+                return signed ? buf.readInt() : buf.readUnsignedInt();
+            default:
+                return buf.readLong();
+        }
+    }
+
+    private void decodeParameter(Position position, int id, ByteBuf buf, int length) {
+        switch (id) {
+            case 2:
+            case 3:
+            case 4:
+                position.set("di" + (id - 1), readValue(buf, length, false));
+                break;
+            case 5:
+                position.set(Position.KEY_IGNITION, readValue(buf, length, false) == 1);
+                break;
+            case 74:
+                position.set(Position.PREFIX_TEMP + 3, readValue(buf, length, true) * 0.1);
+                break;
+            case 78:
+            case 79:
+            case 80:
+                position.set(Position.PREFIX_TEMP + (id - 78), readValue(buf, length, true) * 0.1);
+                break;
+            default:
+                position.set(Position.PREFIX_IO + id, readValue(buf, length, false));
+                break;
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        buf.readUnsignedShort(); // data length
+
+        String imei = String.format("%015d", buf.readLong());
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        int type = buf.readUnsignedByte();
+
+        if (type == MSG_RECORDS || type == MSG_EXTENDED_RECORDS) {
+
+            List<Position> positions = new LinkedList<>();
+
+            buf.readUnsignedByte(); // records left
+            int count = buf.readUnsignedByte();
+
+            for (int i = 0; i < count; i++) {
+                Position position = new Position(getProtocolName());
+                position.setDeviceId(deviceSession.getDeviceId());
+
+                position.setTime(new Date(buf.readUnsignedInt() * 1000));
+                buf.readUnsignedByte(); // timestamp extension
+
+                if (type == MSG_EXTENDED_RECORDS) {
+                    buf.readUnsignedByte(); // record extension
+                }
+
+                buf.readUnsignedByte(); // priority (reserved)
+
+                position.setValid(true);
+                position.setLongitude(buf.readInt() / 10000000.0);
+                position.setLatitude(buf.readInt() / 10000000.0);
+                position.setAltitude(buf.readUnsignedShort() / 10.0);
+                position.setCourse(buf.readUnsignedShort() / 100.0);
+
+                position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
+
+                position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShort()));
+
+                position.set(Position.KEY_HDOP, buf.readUnsignedByte() / 10.0);
+
+                if (type == MSG_EXTENDED_RECORDS) {
+                    position.set(Position.KEY_EVENT, buf.readUnsignedShort());
+                } else {
+                    position.set(Position.KEY_EVENT, buf.readUnsignedByte());
+                }
+
+                // Read 1 byte data
+                int cnt = buf.readUnsignedByte();
+                for (int j = 0; j < cnt; j++) {
+                    int id = type == MSG_EXTENDED_RECORDS ? buf.readUnsignedShort() : buf.readUnsignedByte();
+                    decodeParameter(position, id, buf, 1);
+                }
+
+                // Read 2 byte data
+                cnt = buf.readUnsignedByte();
+                for (int j = 0; j < cnt; j++) {
+                    int id = type == MSG_EXTENDED_RECORDS ? buf.readUnsignedShort() : buf.readUnsignedByte();
+                    decodeParameter(position, id, buf, 2);
+                }
+
+                // Read 4 byte data
+                cnt = buf.readUnsignedByte();
+                for (int j = 0; j < cnt; j++) {
+                    int id = type == MSG_EXTENDED_RECORDS ? buf.readUnsignedShort() : buf.readUnsignedByte();
+                    decodeParameter(position, id, buf, 4);
+                }
+
+                // Read 8 byte data
+                cnt = buf.readUnsignedByte();
+                for (int j = 0; j < cnt; j++) {
+                    int id = type == MSG_EXTENDED_RECORDS ? buf.readUnsignedShort() : buf.readUnsignedByte();
+                    decodeParameter(position, id, buf, 8);
+                }
+
+                positions.add(position);
+            }
+
+            if (channel != null) {
+                channel.writeAndFlush(new NetworkMessage(
+                        Unpooled.wrappedBuffer(DataConverter.parseHex("0002640113bc")), remoteAddress));
+            }
+
+            return positions;
+
+        } else if (type == MSG_DTCS) {
+
+            List<Position> positions = new LinkedList<>();
+
+            int count = buf.readUnsignedByte();
+
+            for (int i = 0; i < count; i++) {
+                Position position = new Position(getProtocolName());
+                position.setDeviceId(deviceSession.getDeviceId());
+
+                buf.readUnsignedByte(); // reserved
+
+                position.setTime(new Date(buf.readUnsignedInt() * 1000));
+
+                position.setValid(true);
+                position.setLongitude(buf.readInt() / 10000000.0);
+                position.setLatitude(buf.readInt() / 10000000.0);
+
+                if (buf.readUnsignedByte() == 2) {
+                    position.set(Position.KEY_ARCHIVE, true);
+                }
+
+                position.set(Position.KEY_DTCS, buf.readSlice(5).toString(StandardCharsets.US_ASCII));
+
+                positions.add(position);
+            }
+
+            if (channel != null) {
+                channel.writeAndFlush(new NetworkMessage(
+                        Unpooled.wrappedBuffer(DataConverter.parseHex("00026d01c4a4")), remoteAddress));
+            }
+
+            return positions;
+
+        } else {
+
+            return decodeCommandResponse(deviceSession, type, buf);
+
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/RuptelaProtocolEncoder.java b/src/main/java/org/traccar/protocol/RuptelaProtocolEncoder.java
new file mode 100644
index 000000000..4242584c9
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/RuptelaProtocolEncoder.java
@@ -0,0 +1,73 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import org.traccar.BaseProtocolEncoder;
+import org.traccar.helper.Checksum;
+import org.traccar.model.Command;
+
+import java.nio.charset.StandardCharsets;
+
+public class RuptelaProtocolEncoder extends BaseProtocolEncoder {
+
+    private ByteBuf encodeContent(int type, ByteBuf content) {
+
+        ByteBuf buf = Unpooled.buffer();
+
+        buf.writeShort(1 + content.readableBytes());
+        buf.writeByte(100 + type);
+        buf.writeBytes(content);
+        buf.writeShort(Checksum.crc16(Checksum.CRC16_KERMIT, buf.nioBuffer(2, buf.writerIndex() - 2)));
+
+        return buf;
+    }
+
+    @Override
+    protected Object encodeCommand(Command command) {
+
+        ByteBuf content = Unpooled.buffer();
+
+        switch (command.getType()) {
+            case Command.TYPE_CUSTOM:
+                content.writeBytes(command.getString(Command.KEY_DATA).getBytes(StandardCharsets.US_ASCII));
+                return encodeContent(RuptelaProtocolDecoder.MSG_SMS_VIA_GPRS, content);
+            case Command.TYPE_CONFIGURATION:
+                content.writeBytes((command.getString(Command.KEY_DATA) + "\r\n").getBytes(StandardCharsets.US_ASCII));
+                return encodeContent(RuptelaProtocolDecoder.MSG_DEVICE_CONFIGURATION, content);
+            case Command.TYPE_GET_VERSION:
+                return encodeContent(RuptelaProtocolDecoder.MSG_DEVICE_VERSION, content);
+            case Command.TYPE_FIRMWARE_UPDATE:
+                content.writeBytes("|FU_STRT*\r\n".getBytes(StandardCharsets.US_ASCII));
+                return encodeContent(RuptelaProtocolDecoder.MSG_FIRMWARE_UPDATE, content);
+            case Command.TYPE_OUTPUT_CONTROL:
+                content.writeInt(command.getInteger(Command.KEY_INDEX));
+                content.writeInt(Integer.parseInt(command.getString(Command.KEY_DATA)));
+                return encodeContent(RuptelaProtocolDecoder.MSG_SET_IO, content);
+            case Command.TYPE_SET_CONNECTION:
+                String c = command.getString(Command.KEY_SERVER) + "," + command.getInteger(Command.KEY_PORT) + ",TCP";
+                content.writeBytes(c.getBytes(StandardCharsets.US_ASCII));
+                return encodeContent(RuptelaProtocolDecoder.MSG_SET_CONNECTION, content);
+            case Command.TYPE_SET_ODOMETER:
+                content.writeInt(Integer.parseInt(command.getString(Command.KEY_DATA)));
+                return encodeContent(RuptelaProtocolDecoder.MSG_SET_ODOMETER, content);
+            default:
+                return null;
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/SabertekFrameDecoder.java b/src/main/java/org/traccar/protocol/SabertekFrameDecoder.java
new file mode 100644
index 000000000..ad5000bf8
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/SabertekFrameDecoder.java
@@ -0,0 +1,44 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+import org.traccar.BaseFrameDecoder;
+
+public class SabertekFrameDecoder extends BaseFrameDecoder {
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+        int beginIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) 0x02);
+        if (beginIndex >= 0) {
+            int endIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) 0x03);
+            if (endIndex >= 0) {
+                buf.readerIndex(beginIndex + 1);
+                ByteBuf frame = buf.readRetainedSlice(endIndex - beginIndex - 1);
+                buf.readerIndex(endIndex + 1);
+                buf.skipBytes(2); // end line
+                return frame;
+            }
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/SabertekProtocol.java b/src/main/java/org/traccar/protocol/SabertekProtocol.java
new file mode 100644
index 000000000..0ec847b60
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/SabertekProtocol.java
@@ -0,0 +1,36 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class SabertekProtocol extends BaseProtocol {
+
+    public SabertekProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new SabertekFrameDecoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new SabertekProtocolDecoder(SabertekProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/SabertekProtocolDecoder.java b/src/main/java/org/traccar/protocol/SabertekProtocolDecoder.java
new file mode 100644
index 000000000..3033aa2cc
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/SabertekProtocolDecoder.java
@@ -0,0 +1,135 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.Date;
+import java.util.regex.Pattern;
+
+public class SabertekProtocolDecoder extends BaseProtocolDecoder {
+
+    public SabertekProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text(",")
+            .number("(d+),")                     // id
+            .number("d,")                        // type
+            .groupBegin()
+            .number("d+,")                       // imei
+            .number("d+,")                       // scid
+            .expression("[^,]*,")                // phone
+            .number("(dddd)(dd)(dd)")            // date (yyyymmdd)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .groupEnd("?")
+            .number("(d+),")                     // battery
+            .number("(d+),")                     // rssi
+            .number("(d+),")                     // state
+            .number("(d+),")                     // events
+            .number("(d),")                      // valid
+            .number("(-?d+.d+),")                // latitude
+            .number("(-?d+.d+),")                // longitude
+            .number("(d+),")                     // speed
+            .number("(d+),")                     // course
+            .number("(d+),")                     // altitude
+            .number("(d+),")                     // satellites
+            .number("(d+),")                     // odometer
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (channel != null) {
+            channel.writeAndFlush(new NetworkMessage(
+                    Unpooled.wrappedBuffer(new byte[]{(byte) (deviceSession != null ? 0x06 : 0x15)}), remoteAddress));
+        }
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        if (parser.hasNext(6)) {
+            position.setTime(parser.nextDateTime());
+        } else {
+            position.setTime(new Date());
+        }
+
+        position.set(Position.KEY_BATTERY_LEVEL, parser.nextInt());
+        position.set(Position.KEY_RSSI, parser.nextInt());
+
+        int state = parser.nextInt();
+
+        position.set(Position.KEY_IGNITION, BitUtil.check(state, 0));
+        position.set(Position.KEY_CHARGE, BitUtil.check(state, 1));
+
+        if (BitUtil.check(state, 2)) {
+            position.set(Position.KEY_ALARM, Position.ALARM_JAMMING);
+        }
+        if (BitUtil.check(state, 3)) {
+            position.set(Position.KEY_ALARM, Position.ALARM_TAMPERING);
+        }
+
+        int events = parser.nextInt();
+
+        if (BitUtil.check(events, 0)) {
+            position.set(Position.KEY_ALARM, Position.ALARM_BRAKING);
+        }
+        if (BitUtil.check(events, 1)) {
+            position.set(Position.KEY_ALARM, Position.ALARM_OVERSPEED);
+        }
+        if (BitUtil.check(events, 2)) {
+            position.set(Position.KEY_ALARM, Position.ALARM_ACCIDENT);
+        }
+        if (BitUtil.check(events, 3)) {
+            position.set(Position.KEY_ALARM, Position.ALARM_CORNERING);
+        }
+
+        position.setValid(parser.nextInt() == 1);
+        position.setLatitude(parser.nextDouble());
+        position.setLongitude(parser.nextDouble());
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextInt()));
+        position.setCourse(parser.nextInt());
+        position.setAltitude(parser.nextInt());
+
+        position.set(Position.KEY_SATELLITES, parser.nextInt());
+        position.set(Position.KEY_ODOMETER, parser.nextInt() * 1000L);
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/SanavProtocol.java b/src/main/java/org/traccar/protocol/SanavProtocol.java
new file mode 100644
index 000000000..6799c57e6
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/SanavProtocol.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class SanavProtocol extends BaseProtocol {
+
+    public SanavProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new SanavProtocolDecoder(SanavProtocol.this));
+            }
+        });
+        addServer(new TrackerServer(true, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new SanavProtocolDecoder(SanavProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/SanavProtocolDecoder.java b/src/main/java/org/traccar/protocol/SanavProtocolDecoder.java
new file mode 100644
index 000000000..7e1c158e6
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/SanavProtocolDecoder.java
@@ -0,0 +1,107 @@
+/*
+ * Copyright 2013 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class SanavProtocolDecoder extends BaseProtocolDecoder {
+
+    public SanavProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .expression("imei[:=]")
+            .number("(d+)")                      // imei
+            .expression("&?rmc[:=]")
+            .text("$GPRMC,")
+            .number("(dd)(dd)(dd).d+,")          // time (hhmmss.sss)
+            .expression("([AV]),")               // validity
+            .number("(d+)(dd.d+),")              // latitude
+            .expression("([NS]),")
+            .number("(d+)(dd.d+),")              // longitude
+            .expression("([EW]),")
+            .number("(d+.d+),")                  // speed
+            .number("(d+.d+)?,")                 // course
+            .number("(dd)(dd)(dd),")             // date (ddmmyy)
+            .groupBegin()
+            .expression("[^*]*")
+            .text("*")
+            .number("xx,")
+            .expression("[^,]+,")                // status
+            .number("(d+),")                     // io
+            .groupEnd("?")
+            .any()
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        DateBuilder dateBuilder = new DateBuilder()
+                .setTime(parser.nextInt(), parser.nextInt(), parser.nextInt());
+
+        position.setValid(parser.next().equals("A"));
+        position.setLatitude(parser.nextCoordinate());
+        position.setLongitude(parser.nextCoordinate());
+        position.setSpeed(parser.nextDouble());
+        position.setCourse(parser.nextDouble(0));
+
+        dateBuilder.setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt());
+        position.setTime(dateBuilder.getDate());
+
+        if (parser.hasNext()) {
+            int io = parser.nextHexInt();
+            for (int i = 0; i < 5; i++) {
+                position.set(Position.PREFIX_IN + (i + 1), BitUtil.check(io, i));
+            }
+            position.set(Position.KEY_IGNITION, BitUtil.check(io, 5));
+            position.set(Position.PREFIX_OUT + 1, BitUtil.check(io, 6));
+            position.set(Position.PREFIX_OUT + 2, BitUtil.check(io, 7));
+            position.set(Position.KEY_CHARGE, BitUtil.check(io, 8));
+            if (!BitUtil.check(io, 9)) {
+                position.set(Position.KEY_ALARM, Position.ALARM_LOW_BATTERY);
+            }
+        }
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/SatsolProtocol.java b/src/main/java/org/traccar/protocol/SatsolProtocol.java
new file mode 100644
index 000000000..b69fdd1fe
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/SatsolProtocol.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2019 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LengthFieldBasedFrameDecoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+import java.nio.ByteOrder;
+
+public class SatsolProtocol extends BaseProtocol {
+
+    public SatsolProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LengthFieldBasedFrameDecoder(ByteOrder.LITTLE_ENDIAN, 1400, 8, 2, 0, 0, true));
+                pipeline.addLast(new SatsolProtocolDecoder(SatsolProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/SatsolProtocolDecoder.java b/src/main/java/org/traccar/protocol/SatsolProtocolDecoder.java
new file mode 100644
index 000000000..c457d5620
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/SatsolProtocolDecoder.java
@@ -0,0 +1,104 @@
+/*
+ * Copyright 2019 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.Checksum;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.Date;
+import java.util.LinkedList;
+import java.util.List;
+
+public class SatsolProtocolDecoder extends BaseProtocolDecoder {
+
+    public SatsolProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        buf.readUnsignedShortLE(); // checksum
+        buf.readUnsignedShortLE(); // preamble
+        long id = buf.readUnsignedIntLE();
+        buf.readUnsignedShortLE(); // length
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, String.valueOf(id));
+        if (deviceSession == null) {
+            return null;
+        }
+
+        List<Position> positions = new LinkedList<>();
+
+        while (buf.isReadable()) {
+
+            buf.readUnsignedShortLE(); // checksum
+            buf.readUnsignedShortLE(); // checksum
+            buf.readUnsignedShortLE(); // type
+            int length = buf.readUnsignedShortLE();
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            position.setTime(new Date(buf.readUnsignedIntLE() * 1000));
+            position.setLatitude(buf.readUnsignedIntLE() * 0.000001);
+            position.setLongitude(buf.readUnsignedIntLE() * 0.000001);
+            position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShortLE() * 0.01));
+            position.setAltitude(buf.readShortLE());
+            position.setCourse(buf.readUnsignedShortLE());
+            position.setValid(buf.readUnsignedByte() > 0);
+
+            position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
+            position.set(Position.KEY_EVENT, buf.readUnsignedByte());
+
+            if (BitUtil.check(buf.readUnsignedByte(), 0)) {
+                position.set(Position.KEY_ARCHIVE, true);
+            }
+
+            positions.add(position);
+
+            buf.skipBytes(length);
+
+        }
+
+        if (channel != null) {
+            ByteBuf response = Unpooled.buffer();
+            response.writeShortLE(0);
+            response.writeShortLE(0x4CBF); // preamble
+            response.writeIntLE((int) id);
+            response.writeShortLE(0);
+            response.setShortLE(0, Checksum.crc16(
+                    Checksum.CRC16_CCITT_FALSE, response.nioBuffer(2, response.readableBytes() - 2)));
+            channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
+        }
+
+        return positions;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/SigfoxProtocol.java b/src/main/java/org/traccar/protocol/SigfoxProtocol.java
new file mode 100644
index 000000000..e2f2cbe1f
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/SigfoxProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.http.HttpObjectAggregator;
+import io.netty.handler.codec.http.HttpRequestDecoder;
+import io.netty.handler.codec.http.HttpResponseEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class SigfoxProtocol extends BaseProtocol {
+
+    public SigfoxProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new HttpResponseEncoder());
+                pipeline.addLast(new HttpRequestDecoder());
+                pipeline.addLast(new HttpObjectAggregator(65535));
+                pipeline.addLast(new SigfoxProtocolDecoder(SigfoxProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/SigfoxProtocolDecoder.java b/src/main/java/org/traccar/protocol/SigfoxProtocolDecoder.java
new file mode 100644
index 000000000..d7836b35d
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/SigfoxProtocolDecoder.java
@@ -0,0 +1,92 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import io.netty.handler.codec.http.FullHttpRequest;
+import io.netty.handler.codec.http.HttpResponseStatus;
+import org.traccar.BaseHttpProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.DataConverter;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import javax.json.Json;
+import javax.json.JsonObject;
+import java.io.StringReader;
+import java.net.SocketAddress;
+import java.net.URLDecoder;
+import java.nio.charset.StandardCharsets;
+import java.util.Date;
+
+public class SigfoxProtocolDecoder extends BaseHttpProtocolDecoder {
+
+    public SigfoxProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        FullHttpRequest request = (FullHttpRequest) msg;
+        JsonObject json = Json.createReader(new StringReader(URLDecoder.decode(
+                request.content().toString(StandardCharsets.UTF_8).split("=")[0], "UTF-8"))).readObject();
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, json.getString("device"));
+        if (deviceSession == null) {
+            sendResponse(channel, HttpResponseStatus.BAD_REQUEST);
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setTime(new Date(json.getInt("time") * 1000L));
+
+        ByteBuf buf = Unpooled.wrappedBuffer(DataConverter.parseHex(json.getString("data")));
+        try {
+            int type = buf.readUnsignedByte() >> 4;
+            if (type == 0) {
+
+                position.setValid(true);
+                position.setLatitude(buf.readIntLE() * 0.0000001);
+                position.setLongitude(buf.readIntLE() * 0.0000001);
+                position.setCourse(buf.readUnsignedByte() * 2);
+                position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte()));
+
+                position.set(Position.KEY_BATTERY, buf.readUnsignedByte() * 0.025);
+
+            } else {
+
+                getLastLocation(position, position.getDeviceTime());
+
+            }
+        } finally {
+            buf.release();
+        }
+
+        position.set(Position.KEY_RSSI, json.getJsonNumber("rssi").doubleValue());
+        position.set(Position.KEY_INDEX, json.getInt("seqNumber"));
+
+        sendResponse(channel, HttpResponseStatus.OK);
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/SiwiProtocol.java b/src/main/java/org/traccar/protocol/SiwiProtocol.java
new file mode 100644
index 000000000..8963721c8
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/SiwiProtocol.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LineBasedFrameDecoder;
+import io.netty.handler.codec.string.StringDecoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class SiwiProtocol extends BaseProtocol {
+
+    public SiwiProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LineBasedFrameDecoder(1024));
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new SiwiProtocolDecoder(SiwiProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/SiwiProtocolDecoder.java b/src/main/java/org/traccar/protocol/SiwiProtocolDecoder.java
new file mode 100644
index 000000000..6b97f5fe0
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/SiwiProtocolDecoder.java
@@ -0,0 +1,96 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class SiwiProtocolDecoder extends BaseProtocolDecoder {
+
+    public SiwiProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("$").expression("[A-Z]+,")     // header
+            .number("(d+),")                     // device id
+            .number("d+,")                       // unit no
+            .expression("([A-Z]),")              // reason
+            .number("d+,")                       // command code
+            .number("[^,]*,")                    // command value
+            .expression("([01]),")               // ignition
+            .expression("[01],")                 // power cut
+            .expression("[01],")                 // box open
+            .number("d+,")                       // message key
+            .number("(d+),")                     // odometer
+            .number("(d+),")                     // speed
+            .number("(d+),")                     // satellites
+            .expression("([AV]),")               // valid
+            .number("(-?d+.d+),")                // latitude
+            .number("(-?d+.d+),")                // longitude
+            .number("(-?d+),")                   // altitude
+            .number("(d+),")                     // course
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .number("(dd)(dd)(dd),")             // date (ddmmyy)
+            .any()
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.set(Position.KEY_EVENT, parser.next());
+        position.set(Position.KEY_IGNITION, parser.next().equals("1"));
+        position.set(Position.KEY_ODOMETER, parser.nextInt(0));
+
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextInt(0)));
+
+        position.set(Position.KEY_SATELLITES, parser.nextInt(0));
+
+        position.setValid(parser.next().equals("A"));
+        position.setLatitude(parser.nextDouble(0));
+        position.setLongitude(parser.nextDouble(0));
+        position.setAltitude(parser.nextDouble(0));
+        position.setCourse(parser.nextInt(0));
+
+        position.setTime(parser.nextDateTime(Parser.DateTimeFormat.HMS_DMY, "IST"));
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/SkypatrolProtocol.java b/src/main/java/org/traccar/protocol/SkypatrolProtocol.java
new file mode 100644
index 000000000..7c6203d86
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/SkypatrolProtocol.java
@@ -0,0 +1,33 @@
+/*
+ * Copyright 2015 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class SkypatrolProtocol extends BaseProtocol {
+
+    public SkypatrolProtocol() {
+        addServer(new TrackerServer(true, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new SkypatrolProtocolDecoder(SkypatrolProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/SkypatrolProtocolDecoder.java b/src/main/java/org/traccar/protocol/SkypatrolProtocolDecoder.java
new file mode 100644
index 000000000..3c7ca6dc5
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/SkypatrolProtocolDecoder.java
@@ -0,0 +1,193 @@
+/*
+ * Copyright 2012 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.Context;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.DateBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+
+public class SkypatrolProtocolDecoder extends BaseProtocolDecoder {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(SkypatrolProtocolDecoder.class);
+
+    private final long defaultMask;
+
+    public SkypatrolProtocolDecoder(Protocol protocol) {
+        super(protocol);
+        defaultMask = Context.getConfig().getInteger(getProtocolName() + ".mask");
+    }
+
+    private static double convertCoordinate(long coordinate) {
+        int sign = 1;
+        if (coordinate > 0x7fffffffL) {
+            sign = -1;
+            coordinate = 0xffffffffL - coordinate;
+        }
+
+        long degrees = coordinate / 1000000;
+        double minutes = (coordinate % 1000000) / 10000.0;
+
+        return sign * (degrees + minutes / 60);
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        int apiNumber = buf.readUnsignedShort();
+        int commandType = buf.readUnsignedByte();
+        int messageType = BitUtil.from(buf.readUnsignedByte(), 4);
+        long mask = defaultMask;
+        if (buf.readUnsignedByte() == 4) {
+            mask = buf.readUnsignedInt();
+        }
+
+        // Binary position report
+        if (apiNumber == 5 && commandType == 2 && messageType == 1 && BitUtil.check(mask, 0)) {
+
+            Position position = new Position(getProtocolName());
+
+            if (BitUtil.check(mask, 1)) {
+                position.set(Position.KEY_STATUS, buf.readUnsignedInt());
+            }
+
+            String id;
+            if (BitUtil.check(mask, 23)) {
+                id = buf.toString(buf.readerIndex(), 8, StandardCharsets.US_ASCII).trim();
+                buf.skipBytes(8);
+            } else if (BitUtil.check(mask, 2)) {
+                id = buf.toString(buf.readerIndex(), 22, StandardCharsets.US_ASCII).trim();
+                buf.skipBytes(22);
+            } else {
+                LOGGER.warn("No device id field");
+                return null;
+            }
+            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, id);
+            if (deviceSession == null) {
+                return null;
+            }
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            if (BitUtil.check(mask, 3)) {
+                position.set(Position.PREFIX_IO + 1, buf.readUnsignedShort());
+            }
+
+            if (BitUtil.check(mask, 4)) {
+                position.set(Position.PREFIX_ADC + 1, buf.readUnsignedShort());
+            }
+
+            if (BitUtil.check(mask, 5)) {
+                position.set(Position.PREFIX_ADC + 2, buf.readUnsignedShort());
+            }
+
+            if (BitUtil.check(mask, 7)) {
+                buf.readUnsignedByte(); // function category
+            }
+
+            DateBuilder dateBuilder = new DateBuilder();
+
+            if (BitUtil.check(mask, 8)) {
+                dateBuilder.setDateReverse(
+                        buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte());
+            }
+
+            if (BitUtil.check(mask, 9)) {
+                position.setValid(buf.readUnsignedByte() == 1); // gps status
+            }
+
+            if (BitUtil.check(mask, 10)) {
+                position.setLatitude(convertCoordinate(buf.readUnsignedInt()));
+            }
+
+            if (BitUtil.check(mask, 11)) {
+                position.setLongitude(convertCoordinate(buf.readUnsignedInt()));
+            }
+
+            if (BitUtil.check(mask, 12)) {
+                position.setSpeed(buf.readUnsignedShort() / 10.0);
+            }
+
+            if (BitUtil.check(mask, 13)) {
+                position.setCourse(buf.readUnsignedShort() / 10.0);
+            }
+
+            if (BitUtil.check(mask, 14)) {
+                dateBuilder.setTime(
+                        buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte());
+            }
+
+            position.setTime(dateBuilder.getDate());
+
+            if (BitUtil.check(mask, 15)) {
+                position.setAltitude(buf.readMedium());
+            }
+
+            if (BitUtil.check(mask, 16)) {
+                position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
+            }
+
+            if (BitUtil.check(mask, 17)) {
+                position.set(Position.KEY_BATTERY, buf.readUnsignedShort());
+            }
+
+            if (BitUtil.check(mask, 20)) {
+                position.set(Position.KEY_ODOMETER_TRIP, buf.readUnsignedInt());
+            }
+
+            if (BitUtil.check(mask, 21)) {
+                position.set(Position.KEY_ODOMETER, buf.readUnsignedInt());
+            }
+
+            if (BitUtil.check(mask, 22)) {
+                buf.skipBytes(6); // time of message generation
+            }
+
+            if (BitUtil.check(mask, 24)) {
+                position.set(Position.KEY_POWER, buf.readUnsignedShort() * 0.001);
+            }
+
+            if (BitUtil.check(mask, 25)) {
+                buf.skipBytes(18); // gps overspeed
+            }
+
+            if (BitUtil.check(mask, 26)) {
+                buf.skipBytes(54); // cell information
+            }
+
+            if (BitUtil.check(mask, 28)) {
+                position.set(Position.KEY_INDEX, buf.readUnsignedShort());
+            }
+
+            return position;
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/SmartSoleProtocol.java b/src/main/java/org/traccar/protocol/SmartSoleProtocol.java
new file mode 100644
index 000000000..bcf43f68b
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/SmartSoleProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.CharacterDelimiterFrameDecoder;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class SmartSoleProtocol extends BaseProtocol {
+
+    public SmartSoleProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, '$'));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new SmartSoleProtocolDecoder(SmartSoleProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/SmartSoleProtocolDecoder.java b/src/main/java/org/traccar/protocol/SmartSoleProtocolDecoder.java
new file mode 100644
index 000000000..04920c969
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/SmartSoleProtocolDecoder.java
@@ -0,0 +1,91 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class SmartSoleProtocolDecoder extends BaseProtocolDecoder {
+
+    public SmartSoleProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("#GTXRP=")
+            .number("(d+),")                     // imei
+            .number("d+,")                       // report type
+            .number("(dd)(dd)(dd)")              // date (yymmdd)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .number("(-?d+.d+),")                // longitude
+            .number("(-?d+.d+),")                // latitude
+            .number("(-?d+),")                   // altitude
+            .number("(d+),")                     // speed
+            .number("([01]),")                   // valid
+            .number("(d+),")                     // satellites
+            .number("(d+.d+),")                  // hdop
+            .number("(dd)(dd)(dd)")              // date (yymmdd)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .number("(d+.d+),")                  // battery
+            .number("(d+)")                      // status
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setFixTime(parser.nextDateTime());
+
+        position.setLatitude(parser.nextDouble());
+        position.setLongitude(parser.nextDouble());
+        position.setAltitude(parser.nextInt());
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextInt()));
+        position.setValid(parser.nextInt() == 1);
+
+        position.set(Position.KEY_SATELLITES, parser.nextInt());
+        position.set(Position.KEY_HDOP, parser.nextDouble());
+
+        position.setDeviceTime(parser.nextDateTime());
+
+        position.set(Position.KEY_BATTERY, parser.nextDouble());
+        position.set(Position.KEY_STATUS, parser.nextInt());
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/SmokeyProtocol.java b/src/main/java/org/traccar/protocol/SmokeyProtocol.java
new file mode 100644
index 000000000..482c8347c
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/SmokeyProtocol.java
@@ -0,0 +1,33 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class SmokeyProtocol extends BaseProtocol {
+
+    public SmokeyProtocol() {
+        addServer(new TrackerServer(true, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new SmokeyProtocolDecoder(SmokeyProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/SmokeyProtocolDecoder.java b/src/main/java/org/traccar/protocol/SmokeyProtocolDecoder.java
new file mode 100644
index 000000000..9da52e97a
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/SmokeyProtocolDecoder.java
@@ -0,0 +1,161 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.ByteBufUtil;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.DateBuilder;
+import org.traccar.model.CellTower;
+import org.traccar.model.Network;
+import org.traccar.model.Position;
+import org.traccar.model.WifiAccessPoint;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.time.Instant;
+import java.time.temporal.ChronoUnit;
+
+public class SmokeyProtocolDecoder extends BaseProtocolDecoder {
+
+    public SmokeyProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    public static final int MSG_DATE_RECORD = 0;
+    public static final int MSG_DATE_RECORD_ACK = 1;
+
+    private static void sendResponse(
+            Channel channel, SocketAddress remoteAddress, ByteBuf id, int index, int report) {
+
+        if (channel != null) {
+            ByteBuf response = Unpooled.buffer();
+            response.writeBytes("SM".getBytes(StandardCharsets.US_ASCII));
+            response.writeByte(3); // protocol version
+            response.writeByte(MSG_DATE_RECORD_ACK);
+            response.writeBytes(id);
+            response.writeInt(
+                    (int) ChronoUnit.SECONDS.between(Instant.parse("2000-01-01T00:00:00.00Z"), Instant.now()));
+            response.writeByte(index);
+            response.writeByte(report - 0x200);
+
+            short checksum = (short) 0xF5A0;
+            for (int i = 0; i < response.readableBytes(); i += 2) {
+                checksum ^= response.getShortLE(i);
+            }
+            response.writeShort(checksum);
+
+            channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        buf.skipBytes(2); // header
+        buf.readUnsignedByte(); // protocol version
+
+        int type = buf.readUnsignedByte();
+
+        ByteBuf id = buf.readSlice(8);
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, ByteBufUtil.hexDump(id));
+        if (deviceSession == null) {
+            return null;
+        }
+
+        if (type == MSG_DATE_RECORD) {
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            position.set(Position.KEY_VERSION_FW, buf.readUnsignedShort());
+
+            int status = buf.readUnsignedShort();
+            position.set(Position.KEY_STATUS, status);
+
+            DateBuilder dateBuilder = new DateBuilder()
+                    .setDate(2000, 1, 1).addSeconds(buf.readUnsignedInt());
+
+            getLastLocation(position, dateBuilder.getDate());
+
+            int index = buf.readUnsignedByte();
+            position.set(Position.KEY_INDEX, index);
+
+            int report = buf.readUnsignedShort();
+
+            buf.readUnsignedShort(); // length
+
+            position.set(Position.KEY_BATTERY, buf.readUnsignedShort());
+
+            Network network = new Network();
+
+            if (report != 0x0203) {
+
+                int count = 1;
+                if (report != 0x0200) {
+                    count = buf.readUnsignedByte();
+                }
+
+                for (int i = 0; i < count; i++) {
+                    int mcc = buf.readUnsignedShort();
+                    int mnc = buf.readUnsignedShort();
+                    int lac = buf.readUnsignedShort();
+                    int cid = buf.readUnsignedShort();
+                    if (i == 0) {
+                        buf.readByte(); // timing advance
+                    }
+                    int rssi = buf.readByte();
+                    network.addCellTower(CellTower.from(mcc, mnc, lac, cid, rssi));
+                }
+
+            }
+
+            if (report == 0x0202 || report == 0x0203) {
+
+                int count = buf.readUnsignedByte();
+
+                for (int i = 0; i < count; i++) {
+                    buf.readerIndex(buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) 0) + 1); // ssid
+
+                    String mac = String.format("%02x:%02x:%02x:%02x:%02x:%02x",
+                            buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte(),
+                            buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte());
+
+                    network.addWifiAccessPoint(WifiAccessPoint.from(mac, buf.readByte()));
+                }
+
+            }
+
+            position.setNetwork(network);
+
+            sendResponse(channel, remoteAddress, id, index, report);
+
+            return position;
+
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/SpotProtocol.java b/src/main/java/org/traccar/protocol/SpotProtocol.java
new file mode 100644
index 000000000..bbf0e8d8a
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/SpotProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.http.HttpObjectAggregator;
+import io.netty.handler.codec.http.HttpRequestDecoder;
+import io.netty.handler.codec.http.HttpResponseEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class SpotProtocol extends BaseProtocol {
+
+    public SpotProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new HttpResponseEncoder());
+                pipeline.addLast(new HttpRequestDecoder());
+                pipeline.addLast(new HttpObjectAggregator(65535));
+                pipeline.addLast(new SpotProtocolDecoder(SpotProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/SpotProtocolDecoder.java b/src/main/java/org/traccar/protocol/SpotProtocolDecoder.java
new file mode 100644
index 000000000..da36c2048
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/SpotProtocolDecoder.java
@@ -0,0 +1,102 @@
+/*
+ * Copyright 2017 - 2019 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import com.fasterxml.jackson.databind.util.ByteBufferBackedInputStream;
+import io.netty.channel.Channel;
+import io.netty.handler.codec.http.FullHttpRequest;
+import io.netty.handler.codec.http.HttpResponseStatus;
+import org.traccar.BaseHttpProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.DateUtil;
+import org.traccar.model.Position;
+import org.w3c.dom.Document;
+import org.w3c.dom.Node;
+import org.w3c.dom.NodeList;
+
+import javax.xml.parsers.DocumentBuilder;
+import javax.xml.parsers.DocumentBuilderFactory;
+import javax.xml.parsers.ParserConfigurationException;
+import javax.xml.xpath.XPath;
+import javax.xml.xpath.XPathConstants;
+import javax.xml.xpath.XPathExpression;
+import javax.xml.xpath.XPathExpressionException;
+import javax.xml.xpath.XPathFactory;
+import java.net.SocketAddress;
+import java.util.LinkedList;
+import java.util.List;
+
+public class SpotProtocolDecoder extends BaseHttpProtocolDecoder {
+
+    private DocumentBuilder documentBuilder;
+    private XPath xPath;
+    private XPathExpression messageExpression;
+
+    public SpotProtocolDecoder(Protocol protocol) {
+        super(protocol);
+        try {
+            DocumentBuilderFactory builderFactory = DocumentBuilderFactory.newInstance();
+            builderFactory.setFeature("http://apache.org/xml/features/disallow-doctype-decl", true);
+            builderFactory.setFeature("http://xml.org/sax/features/external-general-entities", false);
+            builderFactory.setFeature("http://xml.org/sax/features/external-parameter-entities", false);
+            builderFactory.setFeature("http://apache.org/xml/features/nonvalidating/load-external-dtd", false);
+            builderFactory.setXIncludeAware(false);
+            builderFactory.setExpandEntityReferences(false);
+            documentBuilder = builderFactory.newDocumentBuilder();
+            xPath = XPathFactory.newInstance().newXPath();
+            messageExpression = xPath.compile("//messageList/message");
+        } catch (ParserConfigurationException | XPathExpressionException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        FullHttpRequest request = (FullHttpRequest) msg;
+
+        Document document = documentBuilder.parse(new ByteBufferBackedInputStream(request.content().nioBuffer()));
+        NodeList nodes = (NodeList) messageExpression.evaluate(document, XPathConstants.NODESET);
+
+        List<Position> positions = new LinkedList<>();
+
+        for (int i = 0; i < nodes.getLength(); i++) {
+            Node node = nodes.item(i);
+            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, xPath.evaluate("esnName", node));
+            if (deviceSession != null) {
+
+                Position position = new Position(getProtocolName());
+                position.setDeviceId(deviceSession.getDeviceId());
+
+                position.setValid(true);
+                position.setTime(DateUtil.parseDate(xPath.evaluate("timestamp", node)));
+                position.setLatitude(Double.parseDouble(xPath.evaluate("latitude", node)));
+                position.setLongitude(Double.parseDouble(xPath.evaluate("longitude", node)));
+
+                position.set(Position.KEY_EVENT, xPath.evaluate("messageType", node));
+
+                positions.add(position);
+
+            }
+        }
+
+        sendResponse(channel, HttpResponseStatus.OK);
+        return positions;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/StarLinkProtocol.java b/src/main/java/org/traccar/protocol/StarLinkProtocol.java
new file mode 100644
index 000000000..5630722ee
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/StarLinkProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LineBasedFrameDecoder;
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class StarLinkProtocol extends BaseProtocol {
+
+    public StarLinkProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LineBasedFrameDecoder(1024));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new StarLinkProtocolDecoder(StarLinkProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/StarLinkProtocolDecoder.java b/src/main/java/org/traccar/protocol/StarLinkProtocolDecoder.java
new file mode 100644
index 000000000..ed5f81c1c
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/StarLinkProtocolDecoder.java
@@ -0,0 +1,229 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.Context;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.CellTower;
+import org.traccar.model.Network;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.text.DateFormat;
+import java.text.SimpleDateFormat;
+import java.util.TimeZone;
+import java.util.regex.Pattern;
+
+public class StarLinkProtocolDecoder extends BaseProtocolDecoder {
+
+    private String[] dataTags;
+    private DateFormat dateFormat;
+
+    public StarLinkProtocolDecoder(Protocol protocol) {
+        super(protocol);
+
+        String format = Context.getConfig().getString(
+                getProtocolName() + ".format", "#EDT#,#EID#,#PDT#,#LAT#,#LONG#,#SPD#,#HEAD#,#ODO#,"
+                + "#IN1#,#IN2#,#IN3#,#IN4#,#OUT1#,#OUT2#,#OUT3#,#OUT4#,#LAC#,#CID#,#VIN#,#VBAT#,#DEST#,#IGN#,#ENG#");
+        dataTags = format.split(",");
+
+        dateFormat = new SimpleDateFormat(
+                Context.getConfig().getString(getProtocolName() + ".dateFormat", "yyMMddHHmmss"));
+        dateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .expression(".")                     // protocol head
+            .text("SLU")                         // message head
+            .number("(x{6}|d{15}),")             // id
+            .number("(d+),")                     // type
+            .number("(d+),")                     // index
+            .expression("(.+)")                  // data
+            .text("*")
+            .number("xx")                        // checksum
+            .compile();
+
+    public static final int MSG_EVENT_REPORT = 6;
+
+    private double parseCoordinate(String value) {
+        int minutesIndex = value.indexOf('.') - 2;
+        double result = Double.parseDouble(value.substring(1, minutesIndex));
+        result += Double.parseDouble(value.substring(minutesIndex)) / 60;
+        return value.charAt(0) == '+' ? result : -result;
+    }
+
+    private String decodeAlarm(int event) {
+        switch (event) {
+            case 6:
+                return Position.ALARM_OVERSPEED;
+            case 7:
+                return Position.ALARM_GEOFENCE_ENTER;
+            case 8:
+                return Position.ALARM_GEOFENCE_EXIT;
+            case 9:
+                return Position.ALARM_POWER_CUT;
+            case 11:
+                return Position.ALARM_LOW_BATTERY;
+            case 26:
+                return Position.ALARM_TOW;
+            case 36:
+                return Position.ALARM_SOS;
+            case 42:
+                return Position.ALARM_JAMMING;
+            default:
+                return null;
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        int type = parser.nextInt(0);
+        if (type != MSG_EVENT_REPORT) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+        position.setValid(true);
+
+        position.set(Position.KEY_INDEX, parser.nextInt(0));
+
+        String[] data = parser.next().split(",");
+        Integer lac = null, cid = null;
+        int event = 0;
+
+        for (int i = 0; i < Math.min(data.length, dataTags.length); i++) {
+            if (data[i].isEmpty()) {
+                continue;
+            }
+            switch (dataTags[i]) {
+                case "#EDT#":
+                    position.setDeviceTime(dateFormat.parse(data[i]));
+                    break;
+                case "#EID#":
+                    event = Integer.parseInt(data[i]);
+                    position.set(Position.KEY_ALARM, decodeAlarm(event));
+                    position.set(Position.KEY_EVENT, event);
+                    break;
+                case "#PDT#":
+                    position.setFixTime(dateFormat.parse(data[i]));
+                    break;
+                case "#LAT#":
+                    position.setLatitude(parseCoordinate(data[i]));
+                    break;
+                case "#LONG#":
+                    position.setLongitude(parseCoordinate(data[i]));
+                    break;
+                case "#SPD#":
+                    position.setSpeed(Double.parseDouble(data[i]));
+                    break;
+                case "#HEAD#":
+                    position.setCourse(Integer.parseInt(data[i]));
+                    break;
+                case "#ODO#":
+                    position.set(Position.KEY_ODOMETER, Long.parseLong(data[i]) * 1000);
+                    break;
+                case "#IN1#":
+                    position.set(Position.PREFIX_IN + 1, Integer.parseInt(data[i]));
+                    break;
+                case "#IN2#":
+                    position.set(Position.PREFIX_IN + 2, Integer.parseInt(data[i]));
+                    break;
+                case "#IN3#":
+                    position.set(Position.PREFIX_IN + 3, Integer.parseInt(data[i]));
+                    break;
+                case "#IN4#":
+                    position.set(Position.PREFIX_IN + 4, Integer.parseInt(data[i]));
+                    break;
+                case "#OUT1#":
+                    position.set(Position.PREFIX_OUT + 1, Integer.parseInt(data[i]));
+                    break;
+                case "#OUT2#":
+                    position.set(Position.PREFIX_OUT + 2, Integer.parseInt(data[i]));
+                    break;
+                case "#OUT3#":
+                    position.set(Position.PREFIX_OUT + 3, Integer.parseInt(data[i]));
+                    break;
+                case "#OUT4#":
+                    position.set(Position.PREFIX_OUT + 4, Integer.parseInt(data[i]));
+                    break;
+                case "#LAC#":
+                    if (!data[i].isEmpty()) {
+                        lac = Integer.parseInt(data[i]);
+                    }
+                    break;
+                case "#CID#":
+                    if (!data[i].isEmpty()) {
+                        cid = Integer.parseInt(data[i]);
+                    }
+                    break;
+                case "#VIN#":
+                    position.set(Position.KEY_POWER, Double.parseDouble(data[i]));
+                    break;
+                case "#VBAT#":
+                    position.set(Position.KEY_BATTERY, Double.parseDouble(data[i]));
+                    break;
+                case "#DEST#":
+                    position.set("destination", data[i]);
+                    break;
+                case "#IGN#":
+                    position.set(Position.KEY_IGNITION, data[i].equals("1"));
+                    break;
+                case "#ENG#":
+                    position.set("engine", data[i].equals("1"));
+                    break;
+                default:
+                    break;
+            }
+        }
+
+        if (position.getFixTime() == null) {
+            getLastLocation(position, null);
+        }
+
+        if (lac != null && cid != null) {
+            position.setNetwork(new Network(CellTower.fromLacCid(lac, cid)));
+        }
+
+        if (event == 20) {
+            String rfid = data[data.length - 1];
+            if (rfid.matches("0+")) {
+                rfid = data[data.length - 2];
+            }
+            position.set(Position.KEY_DRIVER_UNIQUE_ID, rfid);
+        }
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Stl060FrameDecoder.java b/src/main/java/org/traccar/protocol/Stl060FrameDecoder.java
new file mode 100644
index 000000000..f72474e2b
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Stl060FrameDecoder.java
@@ -0,0 +1,48 @@
+/*
+ * Copyright 2014 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.ChannelHandlerContext;
+import org.traccar.CharacterDelimiterFrameDecoder;
+
+public class Stl060FrameDecoder extends CharacterDelimiterFrameDecoder {
+
+    public Stl060FrameDecoder(int maxFrameLength) {
+        super(maxFrameLength, '#');
+    }
+
+    @Override
+    protected Object decode(ChannelHandlerContext ctx, ByteBuf buf) throws Exception {
+
+        ByteBuf result = (ByteBuf) super.decode(ctx, buf);
+
+        if (result != null) {
+
+            int index = result.indexOf(result.readerIndex(), result.writerIndex(), (byte) '$');
+            if (index == -1) {
+                return result;
+            } else {
+                result.skipBytes(index);
+                return result.readRetainedSlice(result.readableBytes());
+            }
+
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Stl060Protocol.java b/src/main/java/org/traccar/protocol/Stl060Protocol.java
new file mode 100644
index 000000000..2711e936b
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Stl060Protocol.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class Stl060Protocol extends BaseProtocol {
+
+    public Stl060Protocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new Stl060FrameDecoder(1024));
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new Stl060ProtocolDecoder(Stl060Protocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Stl060ProtocolDecoder.java b/src/main/java/org/traccar/protocol/Stl060ProtocolDecoder.java
new file mode 100644
index 000000000..7b0055aa1
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Stl060ProtocolDecoder.java
@@ -0,0 +1,120 @@
+/*
+ * Copyright 2014 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class Stl060ProtocolDecoder extends BaseProtocolDecoder {
+
+    public Stl060ProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .any()
+            .text("$1,")
+            .number("(d+),")                     // imei
+            .text("D001,")                       // type
+            .expression("[^,]*,")                // vehicle
+            .number("(dd)/(dd)/(dd),")           // date (dd/mm/yy)
+            .number("(dd):(dd):(dd),")           // time (hh:mm:ss)
+            .number("(dd)(dd).?(d+)([NS]),")     // latitude
+            .number("(ddd)(dd).?(d+)([EW]),")    // longitude
+            .number("(d+.?d*),")                 // speed
+            .number("(d+.?d*),")                 // course
+            .groupBegin()
+            .number("(d+),")                     // odometer
+            .number("(d+),")                     // Ignition
+            .number("(d+),")                     // di1
+            .number("(d+),")                     // di2
+            .number("(d+),")                     // fuel
+            .or()
+            .expression("([01]),")               // charging
+            .expression("([01]),")               // ignition
+            .expression("0,0,")                  // reserved
+            .number("(d+),")                     // di
+            .expression("([^,]+),")              // rfid
+            .number("(d+),")                     // odometer
+            .number("(d+),")                     // temperature
+            .number("(d+),")                     // fuel
+            .expression("([01]),")               // accelerometer
+            .expression("([01]),")               // do1
+            .expression("([01]),")               // do2
+            .groupEnd()
+            .expression("([AV])")                // validity
+            .any()
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
+
+        position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_MIN_MIN_HEM));
+        position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_MIN_MIN_HEM));
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
+
+        // Old format
+        if (parser.hasNext(5)) {
+            position.set(Position.KEY_ODOMETER, parser.nextInt(0));
+            position.set(Position.KEY_IGNITION, parser.nextInt(0) == 1);
+            position.set(Position.KEY_INPUT, parser.nextInt(0) + parser.nextInt(0) << 1);
+            position.set(Position.KEY_FUEL_LEVEL, parser.nextInt(0));
+        }
+
+        // New format
+        if (parser.hasNext(10)) {
+            position.set(Position.KEY_CHARGE, parser.nextInt(0) == 1);
+            position.set(Position.KEY_IGNITION, parser.nextInt(0) == 1);
+            position.set(Position.KEY_INPUT, parser.nextInt(0));
+            position.set(Position.KEY_DRIVER_UNIQUE_ID, parser.next());
+            position.set(Position.KEY_ODOMETER, parser.nextInt(0));
+            position.set(Position.PREFIX_TEMP + 1, parser.nextInt(0));
+            position.set(Position.KEY_FUEL_LEVEL, parser.nextInt(0));
+            position.set(Position.KEY_ACCELERATION, parser.nextInt(0) == 1);
+            position.set(Position.KEY_OUTPUT, parser.nextInt(0) + parser.nextInt(0) << 1);
+        }
+
+        position.setValid(parser.next().equals("A"));
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/SuntechProtocol.java b/src/main/java/org/traccar/protocol/SuntechProtocol.java
new file mode 100644
index 000000000..29ae114e7
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/SuntechProtocol.java
@@ -0,0 +1,49 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.CharacterDelimiterFrameDecoder;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+import org.traccar.model.Command;
+
+public class SuntechProtocol extends BaseProtocol {
+
+    public SuntechProtocol() {
+        setSupportedDataCommands(
+                Command.TYPE_OUTPUT_CONTROL,
+                Command.TYPE_REBOOT_DEVICE,
+                Command.TYPE_POSITION_SINGLE,
+                Command.TYPE_ENGINE_STOP,
+                Command.TYPE_ENGINE_RESUME,
+                Command.TYPE_ALARM_ARM,
+                Command.TYPE_ALARM_DISARM);
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, '\r'));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new SuntechProtocolEncoder());
+                pipeline.addLast(new SuntechProtocolDecoder(SuntechProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/SuntechProtocolDecoder.java b/src/main/java/org/traccar/protocol/SuntechProtocolDecoder.java
new file mode 100644
index 000000000..922431021
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/SuntechProtocolDecoder.java
@@ -0,0 +1,467 @@
+/*
+ * Copyright 2013 - 2019 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.Context;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.CellTower;
+import org.traccar.model.Network;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.text.DateFormat;
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.util.TimeZone;
+
+public class SuntechProtocolDecoder extends BaseProtocolDecoder {
+
+    private int protocolType;
+    private boolean hbm;
+    private boolean includeAdc;
+    private boolean includeTemp;
+
+    public SuntechProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    public void setProtocolType(int protocolType) {
+        this.protocolType = protocolType;
+    }
+
+    public int getProtocolType(long deviceId) {
+        return Context.getIdentityManager().lookupAttributeInteger(
+                deviceId, getProtocolName() + ".protocolType", protocolType, true);
+    }
+
+    public void setHbm(boolean hbm) {
+        this.hbm = hbm;
+    }
+
+    public boolean isHbm(long deviceId) {
+        return Context.getIdentityManager().lookupAttributeBoolean(
+                deviceId, getProtocolName() + ".hbm", hbm, true);
+    }
+
+    public void setIncludeAdc(boolean includeAdc) {
+        this.includeAdc = includeAdc;
+    }
+
+    public boolean isIncludeAdc(long deviceId) {
+        return Context.getIdentityManager().lookupAttributeBoolean(
+                deviceId, getProtocolName() + ".includeAdc", includeAdc, true);
+    }
+
+    public void setIncludeTemp(boolean includeTemp) {
+        this.includeTemp = includeTemp;
+    }
+
+    public boolean isIncludeTemp(long deviceId) {
+        return Context.getIdentityManager().lookupAttributeBoolean(
+                deviceId, getProtocolName() + ".includeTemp", includeTemp, true);
+    }
+
+    private Position decode9(
+            Channel channel, SocketAddress remoteAddress, String[] values) throws ParseException {
+        int index = 1;
+
+        String type = values[index++];
+
+        if (!type.equals("Location") && !type.equals("Emergency") && !type.equals("Alert")) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, values[index++]);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        if (type.equals("Emergency") || type.equals("Alert")) {
+            position.set(Position.KEY_ALARM, Position.ALARM_GENERAL);
+        }
+
+        if (!type.equals("Alert") || getProtocolType(deviceSession.getDeviceId()) == 0) {
+            position.set(Position.KEY_VERSION_FW, values[index++]);
+        }
+
+        DateFormat dateFormat = new SimpleDateFormat("yyyyMMddHH:mm:ss");
+        dateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
+        position.setTime(dateFormat.parse(values[index++] + values[index++]));
+
+        if (getProtocolType(deviceSession.getDeviceId()) == 1) {
+            index += 1; // cell
+        }
+
+        position.setLatitude(Double.parseDouble(values[index++]));
+        position.setLongitude(Double.parseDouble(values[index++]));
+        position.setSpeed(UnitsConverter.knotsFromKph(Double.parseDouble(values[index++])));
+        position.setCourse(Double.parseDouble(values[index++]));
+
+        position.setValid(values[index++].equals("1"));
+
+        if (getProtocolType(deviceSession.getDeviceId()) == 1) {
+            position.set(Position.KEY_ODOMETER, Integer.parseInt(values[index++]));
+        }
+
+        return position;
+    }
+
+    private String decodeEmergency(int value) {
+        switch (value) {
+            case 1:
+                return Position.ALARM_SOS;
+            case 2:
+                return Position.ALARM_PARKING;
+            case 3:
+                return Position.ALARM_POWER_CUT;
+            case 5:
+            case 6:
+                return Position.ALARM_DOOR;
+            case 7:
+                return Position.ALARM_MOVEMENT;
+            case 8:
+                return Position.ALARM_SHOCK;
+            default:
+                return null;
+        }
+    }
+
+    private String decodeAlert(int value) {
+        switch (value) {
+            case 1:
+                return Position.ALARM_OVERSPEED;
+            case 5:
+                return Position.ALARM_GEOFENCE_EXIT;
+            case 6:
+                return Position.ALARM_GEOFENCE_ENTER;
+            case 14:
+                return Position.ALARM_LOW_BATTERY;
+            case 15:
+                return Position.ALARM_SHOCK;
+            case 16:
+                return Position.ALARM_ACCIDENT;
+            case 46:
+                return Position.ALARM_ACCELERATION;
+            case 47:
+                return Position.ALARM_BRAKING;
+            case 48:
+                return Position.ALARM_ACCIDENT;
+            case 50:
+                return Position.ALARM_JAMMING;
+            default:
+                return null;
+        }
+    }
+    private Position decode4(
+            Channel channel, SocketAddress remoteAddress, String[] values) throws ParseException {
+        int index = 0;
+
+        String type = values[index++].substring(5);
+
+        if (!type.equals("STT") && !type.equals("ALT")) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, values[index++]);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+        position.set(Position.KEY_TYPE, type);
+
+        position.set(Position.KEY_VERSION_FW, values[index++]);
+        index += 1; // model
+
+        Network network = new Network();
+
+        for (int i = 0; i < 7; i++) {
+            int cid = Integer.parseInt(values[index++]);
+            int mcc = Integer.parseInt(values[index++]);
+            int mnc = Integer.parseInt(values[index++]);
+            int lac, rssi;
+            if (i == 0) {
+                rssi = Integer.parseInt(values[index++]);
+                lac = Integer.parseInt(values[index++]);
+            } else {
+                lac = Integer.parseInt(values[index++]);
+                rssi = Integer.parseInt(values[index++]);
+            }
+            index += 1; // timing advance
+            if (cid > 0) {
+                network.addCellTower(CellTower.from(mcc, mnc, lac, cid, rssi));
+            }
+        }
+
+        position.setNetwork(network);
+
+        position.set(Position.KEY_BATTERY, Double.parseDouble(values[index++]));
+        position.set(Position.KEY_ARCHIVE, values[index++].equals("0") ? true : null);
+        position.set(Position.KEY_INDEX, Integer.parseInt(values[index++]));
+        position.set(Position.KEY_STATUS, Integer.parseInt(values[index++]));
+
+        DateFormat dateFormat = new SimpleDateFormat("yyyyMMddHH:mm:ss");
+        dateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
+        position.setTime(dateFormat.parse(values[index++] + values[index++]));
+
+        position.setLatitude(Double.parseDouble(values[index++]));
+        position.setLongitude(Double.parseDouble(values[index++]));
+        position.setSpeed(UnitsConverter.knotsFromKph(Double.parseDouble(values[index++])));
+        position.setCourse(Double.parseDouble(values[index++]));
+
+        position.set(Position.KEY_SATELLITES, Integer.parseInt(values[index++]));
+
+        position.setValid(values[index++].equals("1"));
+
+        return position;
+    }
+
+    private Position decode2356(
+            Channel channel, SocketAddress remoteAddress, String protocol, String[] values) throws ParseException {
+        int index = 0;
+
+        String type = values[index++].substring(5);
+
+        if (!type.equals("STT") && !type.equals("EMG") && !type.equals("EVT") && !type.equals("ALT")) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, values[index++]);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+        position.set(Position.KEY_TYPE, type);
+
+        if (protocol.equals("ST300") || protocol.equals("ST500") || protocol.equals("ST600")) {
+            index += 1; // model
+        }
+
+        position.set(Position.KEY_VERSION_FW, values[index++]);
+
+        DateFormat dateFormat = new SimpleDateFormat("yyyyMMddHH:mm:ss");
+        dateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
+        position.setTime(dateFormat.parse(values[index++] + values[index++]));
+
+        if (!protocol.equals("ST500")) {
+            long cid = Long.parseLong(values[index++], 16);
+            if (protocol.equals("ST600")) {
+                position.setNetwork(new Network(CellTower.from(
+                        Integer.parseInt(values[index++]), Integer.parseInt(values[index++]),
+                        Integer.parseInt(values[index++], 16), cid, Integer.parseInt(values[index++]))));
+            }
+        }
+
+        position.setLatitude(Double.parseDouble(values[index++]));
+        position.setLongitude(Double.parseDouble(values[index++]));
+        position.setSpeed(UnitsConverter.knotsFromKph(Double.parseDouble(values[index++])));
+        position.setCourse(Double.parseDouble(values[index++]));
+
+        position.set(Position.KEY_SATELLITES, Integer.parseInt(values[index++]));
+
+        position.setValid(values[index++].equals("1"));
+
+        position.set(Position.KEY_ODOMETER, Integer.parseInt(values[index++]));
+        position.set(Position.KEY_POWER, Double.parseDouble(values[index++]));
+
+        String io = values[index++];
+        if (io.length() == 6) {
+            position.set(Position.KEY_IGNITION, io.charAt(0) == '1');
+            position.set(Position.PREFIX_IN + 1, io.charAt(1) == '1');
+            position.set(Position.PREFIX_IN + 2, io.charAt(2) == '1');
+            position.set(Position.PREFIX_IN + 3, io.charAt(3) == '1');
+            position.set(Position.PREFIX_OUT + 1, io.charAt(4) == '1');
+            position.set(Position.PREFIX_OUT + 2, io.charAt(5) == '1');
+        }
+
+        switch (type) {
+            case "STT":
+                position.set(Position.KEY_STATUS, Integer.parseInt(values[index++]));
+                position.set(Position.KEY_INDEX, Integer.parseInt(values[index++]));
+                break;
+            case "EMG":
+                position.set(Position.KEY_ALARM, decodeEmergency(Integer.parseInt(values[index++])));
+                break;
+            case "EVT":
+                position.set(Position.KEY_EVENT, Integer.parseInt(values[index++]));
+                break;
+            case "ALT":
+                position.set(Position.KEY_ALARM, decodeAlert(Integer.parseInt(values[index++])));
+                break;
+            default:
+                break;
+        }
+
+        if (isHbm(deviceSession.getDeviceId())) {
+
+            if (index < values.length) {
+                position.set(Position.KEY_HOURS, UnitsConverter.msFromMinutes(Integer.parseInt(values[index++])));
+            }
+
+            if (index < values.length) {
+                position.set(Position.KEY_BATTERY, Double.parseDouble(values[index++]));
+            }
+
+            if (index < values.length && values[index++].equals("0")) {
+                position.set(Position.KEY_ARCHIVE, true);
+            }
+
+            if (isIncludeAdc(deviceSession.getDeviceId())) {
+                for (int i = 1; i <= 3; i++) {
+                    if (!values[index++].isEmpty()) {
+                        position.set(Position.PREFIX_ADC + i, Double.parseDouble(values[index - 1]));
+                    }
+                }
+            }
+
+            if (values.length - index >= 2) {
+                String driverUniqueId = values[index++];
+                if (values[index++].equals("1") && !driverUniqueId.isEmpty()) {
+                    position.set(Position.KEY_DRIVER_UNIQUE_ID, driverUniqueId);
+                }
+            }
+
+            if (isIncludeTemp(deviceSession.getDeviceId())) {
+                for (int i = 1; i <= 3; i++) {
+                    String temperature = values[index++];
+                    String value = temperature.substring(temperature.indexOf(':') + 1);
+                    if (!value.isEmpty()) {
+                        position.set(Position.PREFIX_TEMP + i, Double.parseDouble(value));
+                    }
+                }
+
+            }
+
+        }
+
+        return position;
+    }
+
+    private Position decodeUniversal(
+            Channel channel, SocketAddress remoteAddress, String[] values) throws ParseException {
+        int index = 0;
+
+        String type = values[index++];
+
+        if (!type.equals("STT")) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, values[index++]);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+        position.set(Position.KEY_TYPE, type);
+
+        int mask = Integer.parseInt(values[index++], 16);
+
+        if (BitUtil.check(mask, 1)) {
+            index += 1; // model
+        }
+
+        if (BitUtil.check(mask, 2)) {
+            position.set(Position.KEY_VERSION_FW, values[index++]);
+        }
+
+        if (BitUtil.check(mask, 3) && values[index++].equals("0")) {
+            position.set(Position.KEY_ARCHIVE, true);
+        }
+
+        if (BitUtil.check(mask, 4) && BitUtil.check(mask, 5)) {
+            DateFormat dateFormat = new SimpleDateFormat("yyyyMMddHH:mm:ss");
+            dateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
+            position.setTime(dateFormat.parse(values[index++] + values[index++]));
+        }
+
+        if (BitUtil.check(mask, 6)) {
+            index += 1; // cell
+        }
+
+        if (BitUtil.check(mask, 7)) {
+            index += 1; // mcc
+        }
+
+        if (BitUtil.check(mask, 8)) {
+            index += 1; // mnc
+        }
+
+        if (BitUtil.check(mask, 9)) {
+            index += 1; // lac
+        }
+
+        if (BitUtil.check(mask, 10)) {
+            position.set(Position.KEY_RSSI, Integer.parseInt(values[index++]));
+        }
+
+        if (BitUtil.check(mask, 11)) {
+            position.setLatitude(Double.parseDouble(values[index++]));
+        }
+
+        if (BitUtil.check(mask, 12)) {
+            position.setLongitude(Double.parseDouble(values[index++]));
+        }
+
+        if (BitUtil.check(mask, 13)) {
+            position.setSpeed(UnitsConverter.knotsFromKph(Double.parseDouble(values[index++])));
+        }
+
+        if (BitUtil.check(mask, 14)) {
+            position.setCourse(Double.parseDouble(values[index++]));
+        }
+
+        if (BitUtil.check(mask, 15)) {
+            position.set(Position.KEY_SATELLITES, Integer.parseInt(values[index++]));
+        }
+
+        if (BitUtil.check(mask, 16)) {
+            position.setValid(values[index++].equals("1"));
+        }
+
+        return position;
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        String[] values = ((String) msg).split(";");
+
+        if (values[0].length() < 5) {
+            return decodeUniversal(channel, remoteAddress, values);
+        } else if (values[0].startsWith("ST9")) {
+            return decode9(channel, remoteAddress, values);
+        } else if (values[0].startsWith("ST4")) {
+            return decode4(channel, remoteAddress, values);
+        } else {
+            return decode2356(channel, remoteAddress, values[0].substring(0, 5), values);
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/SuntechProtocolEncoder.java b/src/main/java/org/traccar/protocol/SuntechProtocolEncoder.java
new file mode 100644
index 000000000..90fa4aa39
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/SuntechProtocolEncoder.java
@@ -0,0 +1,54 @@
+/*
+ * Copyright 2015 - 2016 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.StringProtocolEncoder;
+import org.traccar.model.Command;
+
+public class SuntechProtocolEncoder extends StringProtocolEncoder {
+
+    @Override
+    protected Object encodeCommand(Command command) {
+
+        switch (command.getType()) {
+            case Command.TYPE_REBOOT_DEVICE:
+                return formatCommand(command, "SA200CMD;{%s};02;Reboot\r", Command.KEY_UNIQUE_ID);
+            case Command.TYPE_POSITION_SINGLE:
+                return formatCommand(command, "SA200GTR;{%s};02;\r", Command.KEY_UNIQUE_ID);
+            case Command.TYPE_OUTPUT_CONTROL:
+                if (command.getAttributes().containsKey(Command.KEY_DATA)) {
+                    if (command.getAttributes().get(Command.KEY_DATA).equals("1")) {
+                        return formatCommand(command, "SA200CMD;{%s};02;Enable{%s}\r",
+                                Command.KEY_UNIQUE_ID, Command.KEY_INDEX);
+                    } else {
+                        return formatCommand(command, "SA200CMD;{%s};02;Disable{%s}\r",
+                                Command.KEY_UNIQUE_ID, Command.KEY_INDEX);
+                    }
+                }
+            case Command.TYPE_ENGINE_STOP:
+                return formatCommand(command, "SA200CMD;{%s};02;Enable1\r", Command.KEY_UNIQUE_ID);
+            case Command.TYPE_ENGINE_RESUME:
+                return formatCommand(command, "SA200CMD;{%s};02;Disable1\r", Command.KEY_UNIQUE_ID);
+            case Command.TYPE_ALARM_ARM:
+                return formatCommand(command, "SA200CMD;{%s};02;Enable2\r", Command.KEY_UNIQUE_ID);
+            case Command.TYPE_ALARM_DISARM:
+                return formatCommand(command, "SA200CMD;{%s};02;Disable2\r", Command.KEY_UNIQUE_ID);
+            default:
+                return null;
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/SupermateProtocol.java b/src/main/java/org/traccar/protocol/SupermateProtocol.java
new file mode 100644
index 000000000..46625ddc7
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/SupermateProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.CharacterDelimiterFrameDecoder;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class SupermateProtocol extends BaseProtocol {
+
+    public SupermateProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, "#"));
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new SupermateProtocolDecoder(SupermateProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/SupermateProtocolDecoder.java b/src/main/java/org/traccar/protocol/SupermateProtocolDecoder.java
new file mode 100644
index 000000000..40a25bb91
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/SupermateProtocolDecoder.java
@@ -0,0 +1,122 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.Calendar;
+import java.util.regex.Pattern;
+
+public class SupermateProtocolDecoder extends BaseProtocolDecoder {
+
+    public SupermateProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .number("d+:")                       // header
+            .number("(d+):")                     // imei
+            .number("d+:").text("*,")
+            .number("(d+),")                     // command id
+            .expression("([^,]{2}),")            // command
+            .expression("([AV]),")               // validity
+            .number("(xx)(xx)(xx),")             // date (yymmdd)
+            .number("(xx)(xx)(xx),")             // time (hhmmss)
+            .number("(x)(x{7}),")                // latitude
+            .number("(x)(x{7}),")                // longitude
+            .number("(x{4}),")                   // speed
+            .number("(x{4}),")                   // course
+            .number("(x{12}),")                  // status
+            .number("(x+),")                     // signal
+            .number("(d+),")                     // power
+            .number("(x{4}),")                   // oil
+            .number("(x+)?")                     // odometer
+            .any()
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+
+        String imei = parser.next();
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.set("commandId", parser.next());
+        position.set(Position.KEY_COMMAND, parser.next());
+
+        position.setValid(parser.next().equals("A"));
+
+        DateBuilder dateBuilder = new DateBuilder()
+                .setDate(parser.nextHexInt(0), parser.nextHexInt(0), parser.nextHexInt(0))
+                .setTime(parser.nextHexInt(0), parser.nextHexInt(0), parser.nextHexInt(0));
+        position.setTime(dateBuilder.getDate());
+
+        if (parser.nextHexInt(0) == 8) {
+            position.setLatitude(-parser.nextHexInt(0) / 600000.0);
+        } else {
+            position.setLatitude(parser.nextHexInt(0) / 600000.0);
+        }
+
+        if (parser.nextHexInt(0) == 8) {
+            position.setLongitude(-parser.nextHexInt(0) / 600000.0);
+        } else {
+            position.setLongitude(parser.nextHexInt(0) / 600000.0);
+        }
+
+        position.setSpeed(parser.nextHexInt(0) / 100.0);
+        position.setCourse(parser.nextHexInt(0) / 100.0);
+
+        position.set(Position.KEY_STATUS, parser.next());
+        position.set("signal", parser.next());
+        position.set(Position.KEY_POWER, parser.nextDouble(0));
+        position.set("oil", parser.nextHexInt(0));
+        position.set(Position.KEY_ODOMETER, parser.nextHexInt(0));
+
+        if (channel != null) {
+            Calendar calendar = Calendar.getInstance();
+            String content = String.format("#1:%s:1:*,00000000,UP,%02x%02x%02x,%02x%02x%02x#", imei,
+                    calendar.get(Calendar.YEAR), calendar.get(Calendar.MONTH) + 1, calendar.get(Calendar.DAY_OF_MONTH),
+                    calendar.get(Calendar.HOUR_OF_DAY), calendar.get(Calendar.MINUTE), calendar.get(Calendar.SECOND));
+            channel.writeAndFlush(new NetworkMessage(
+                    Unpooled.copiedBuffer(content, StandardCharsets.US_ASCII), remoteAddress));
+        }
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/SviasProtocol.java b/src/main/java/org/traccar/protocol/SviasProtocol.java
new file mode 100644
index 000000000..f01f28389
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/SviasProtocol.java
@@ -0,0 +1,51 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.CharacterDelimiterFrameDecoder;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+import org.traccar.model.Command;
+
+public class SviasProtocol extends BaseProtocol {
+
+    public SviasProtocol() {
+        setSupportedDataCommands(
+                Command.TYPE_CUSTOM,
+                Command.TYPE_POSITION_SINGLE,
+                Command.TYPE_SET_ODOMETER,
+                Command.TYPE_ENGINE_STOP,
+                Command.TYPE_ENGINE_RESUME,
+                Command.TYPE_ALARM_ARM,
+                Command.TYPE_ALARM_DISARM,
+                Command.TYPE_ALARM_REMOVE);
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, "]"));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new SviasProtocolEncoder());
+                pipeline.addLast(new SviasProtocolDecoder(SviasProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/SviasProtocolDecoder.java b/src/main/java/org/traccar/protocol/SviasProtocolDecoder.java
new file mode 100644
index 000000000..7e783f6cd
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/SviasProtocolDecoder.java
@@ -0,0 +1,105 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.PatternBuilder;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+import org.traccar.DeviceSession;
+import org.traccar.helper.Parser;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+public class SviasProtocolDecoder extends BaseProtocolDecoder {
+
+    public SviasProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("[")                           // delimiter
+            .number("d{4},")                     // hardware version
+            .number("d{4},")                     // software version
+            .number("d+,")                       // index
+            .number("(d+),")                     // imei
+            .number("d+,")                       // hour meter
+            .number("(d+)(dd)(dd),")             // date (dmmyy)
+            .number("(d+)(dd)(dd),")             // time (hmmss)
+            .number("(-?)(d+)(dd)(d{5}),")       // latitude
+            .number("(-?)(d+)(dd)(d{5}),")       // longitude
+            .number("(d+),")                     // speed
+            .number("(d+),")                     // course
+            .number("(d+),")                     // odometer
+            .number("(d+),")                     // input
+            .number("(d+),")                     // output / status
+            .number("(d),")
+            .number("(d),")
+            .number("(d+),")                     // power
+            .number("(d+),")                     // battery level
+            .number("(d+),")                     // rssi
+            .any()
+            .compile();
+
+    @Override
+    protected Object decode(Channel channel, SocketAddress remoteAddress, Object msg)
+            throws Exception {
+
+        if (channel != null) {
+            channel.writeAndFlush(new NetworkMessage("@", remoteAddress));
+        }
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
+        position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN_MIN));
+        position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN_MIN));
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble() * 0.01));
+        position.setCourse(parser.nextDouble() * 0.01);
+
+        position.set(Position.KEY_ODOMETER, parser.nextInt() * 100);
+
+        int input = parser.nextInt();
+        int output = parser.nextInt();
+
+        position.set(Position.KEY_ALARM, BitUtil.check(input, 0) ? Position.ALARM_SOS : null);
+        position.set(Position.KEY_IGNITION, BitUtil.check(input, 4));
+        position.setValid(BitUtil.check(output, 0));
+
+        position.set(Position.KEY_POWER, parser.nextInt() * 0.001);
+        position.set(Position.KEY_BATTERY_LEVEL, parser.nextInt());
+        position.set(Position.KEY_RSSI, parser.nextInt());
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/SviasProtocolEncoder.java b/src/main/java/org/traccar/protocol/SviasProtocolEncoder.java
new file mode 100644
index 000000000..8bfbef119
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/SviasProtocolEncoder.java
@@ -0,0 +1,48 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ * Copyright 2018 Andrey Kunitsyn (andrey@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.StringProtocolEncoder;
+import org.traccar.model.Command;
+
+public class SviasProtocolEncoder extends StringProtocolEncoder {
+
+    @Override
+    protected Object encodeCommand(Command command) {
+        switch (command.getType()) {
+            case Command.TYPE_CUSTOM:
+                return formatCommand(command, "{%s}", Command.KEY_DATA);
+            case Command.TYPE_POSITION_SINGLE:
+                return formatCommand(command, "AT+STR=1*");
+            case Command.TYPE_SET_ODOMETER:
+                return formatCommand(command, "AT+ODT={%s}*", Command.KEY_DATA);
+            case Command.TYPE_ENGINE_STOP:
+                return formatCommand(command, "AT+OUT=1,1*");
+            case Command.TYPE_ENGINE_RESUME:
+                return formatCommand(command, "AT+OUT=1,0*");
+            case Command.TYPE_ALARM_ARM:
+                return formatCommand(command, "AT+OUT=2,1*");
+            case Command.TYPE_ALARM_DISARM:
+                return formatCommand(command, "AT+OUT=2,0*");
+            case Command.TYPE_ALARM_REMOVE:
+                return formatCommand(command, "AT+PNC=600*");
+            default:
+                return null;
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/T55Protocol.java b/src/main/java/org/traccar/protocol/T55Protocol.java
new file mode 100644
index 000000000..f5ec19094
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/T55Protocol.java
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LineBasedFrameDecoder;
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class T55Protocol extends BaseProtocol {
+
+    public T55Protocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LineBasedFrameDecoder(1024));
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new T55ProtocolDecoder(T55Protocol.this));
+            }
+        });
+        addServer(new TrackerServer(true, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new T55ProtocolDecoder(T55Protocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/T55ProtocolDecoder.java b/src/main/java/org/traccar/protocol/T55ProtocolDecoder.java
new file mode 100644
index 000000000..ba231a635
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/T55ProtocolDecoder.java
@@ -0,0 +1,283 @@
+/*
+ * Copyright 2012 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.Context;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.channels.DatagramChannel;
+import java.util.Date;
+import java.util.regex.Pattern;
+
+public class T55ProtocolDecoder extends BaseProtocolDecoder {
+
+    public T55ProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN_GPRMC = new PatternBuilder()
+            .text("$GPRMC,")
+            .number("(dd)(dd)(dd).?d*,")         // time (hhmmss)
+            .expression("([AV]),")               // validity
+            .number("(dd)(dd.d+),")              // latitude
+            .expression("([NS]),")
+            .number("(d{2,3})(dd.d+),")          // longitude
+            .expression("([EW]),")
+            .number("(d+.?d*)?,")                // speed
+            .number("(d+.?d*)?,")                // course
+            .number("(dd)(dd)(dd),")             // date (ddmmyy)
+            .expression("[^*]+")
+            .text("*")
+            .expression("[^,]+")
+            .number(",(d+)")                     // satellites
+            .number(",(d+)")                     // imei
+            .expression(",([01])")               // ignition
+            .number(",(d+)")                     // fuel
+            .number(",(d+)").optional(7)         // battery
+            .number("((?:,d+)+)?")               // parameters
+            .any()
+            .compile();
+
+    private static final Pattern PATTERN_GPGGA = new PatternBuilder()
+            .text("$GPGGA,")
+            .number("(dd)(dd)(dd).?d*,")         // time (hhmmss)
+            .number("(d+)(dd.d+),")              // latitude
+            .expression("([NS]),")
+            .number("(d+)(dd.d+),")              // longitude
+            .expression("([EW]),")
+            .any()
+            .compile();
+
+    private static final Pattern PATTERN_GPRMA = new PatternBuilder()
+            .text("$GPRMA,")
+            .expression("([AV]),")               // validity
+            .number("(dd)(dd.d+),")              // latitude
+            .expression("([NS]),")
+            .number("(ddd)(dd.d+),")             // longitude
+            .expression("([EW]),,,")
+            .number("(d+.?d*)?,")                // speed
+            .number("(d+.?d*)?,")                // course
+            .any()
+            .compile();
+
+    private static final Pattern PATTERN_TRCCR = new PatternBuilder()
+            .text("$TRCCR,")
+            .number("(dddd)(dd)(dd)")            // date (yyyymmdd)
+            .number("(dd)(dd)(dd).?d*,")         // time (hhmmss)
+            .expression("([AV]),")               // validity
+            .number("(-?d+.d+),")                // latitude
+            .number("(-?d+.d+),")                // longitude
+            .number("(d+.d+),")                  // speed
+            .number("(d+.d+),")                  // course
+            .number("(-?d+.d+),")                // altitude
+            .number("(d+.?d*),")                 // battery
+            .any()
+            .compile();
+
+    private Position position = null;
+
+    private Position decodeGprmc(
+            DeviceSession deviceSession, String sentence, SocketAddress remoteAddress, Channel channel) {
+
+        if (deviceSession != null && channel != null && !(channel instanceof DatagramChannel)
+                && Context.getIdentityManager().lookupAttributeBoolean(
+                        deviceSession.getDeviceId(), getProtocolName() + ".ack", false, true)) {
+            channel.writeAndFlush(new NetworkMessage("OK1\r\n", remoteAddress));
+        }
+
+        Parser parser = new Parser(PATTERN_GPRMC, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+
+        if (deviceSession != null) {
+            position.setDeviceId(deviceSession.getDeviceId());
+        }
+
+        DateBuilder dateBuilder = new DateBuilder()
+                .setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+
+        position.setValid(parser.next().equals("A"));
+        position.setLatitude(parser.nextCoordinate());
+        position.setLongitude(parser.nextCoordinate());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
+
+        dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+        position.setTime(dateBuilder.getDate());
+
+        if (parser.hasNext(5)) {
+            position.set(Position.KEY_SATELLITES, parser.nextInt());
+
+            deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+            if (deviceSession == null) {
+                return null;
+            }
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            position.set(Position.KEY_IGNITION, parser.hasNext() && parser.next().equals("1"));
+            position.set(Position.KEY_FUEL_LEVEL, parser.nextInt(0));
+            position.set(Position.KEY_BATTERY, parser.nextInt());
+        }
+
+        if (parser.hasNext()) {
+            String[] parameters = parser.next().split(",");
+            for (int i = 1; i < parameters.length; i++) {
+                position.set(Position.PREFIX_IO + i, parameters[i]);
+            }
+        }
+
+        if (deviceSession != null) {
+            return position;
+        } else {
+            this.position = position; // save position
+            return null;
+        }
+    }
+
+    private Position decodeGpgga(DeviceSession deviceSession, String sentence) {
+
+        Parser parser = new Parser(PATTERN_GPGGA, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        DateBuilder dateBuilder = new DateBuilder()
+                .setCurrentDate()
+                .setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+        position.setTime(dateBuilder.getDate());
+
+        position.setValid(true);
+        position.setLatitude(parser.nextCoordinate());
+        position.setLongitude(parser.nextCoordinate());
+
+        return position;
+    }
+
+    private Position decodeGprma(DeviceSession deviceSession, String sentence) {
+
+        Parser parser = new Parser(PATTERN_GPRMA, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setTime(new Date());
+        position.setValid(parser.next().equals("A"));
+        position.setLatitude(parser.nextCoordinate());
+        position.setLongitude(parser.nextCoordinate());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
+
+        return position;
+    }
+
+    private Position decodeTrccr(DeviceSession deviceSession, String sentence) {
+
+        Parser parser = new Parser(PATTERN_TRCCR, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setTime(parser.nextDateTime());
+
+        position.setValid(parser.next().equals("A"));
+        position.setLatitude(parser.nextDouble(0));
+        position.setLongitude(parser.nextDouble(0));
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
+        position.setAltitude(parser.nextDouble(0));
+
+        position.set(Position.KEY_BATTERY, parser.nextDouble(0));
+
+        return position;
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        String sentence = (String) msg;
+
+        DeviceSession deviceSession;
+
+        if (!sentence.startsWith("$") && sentence.contains("$")) {
+            int index = sentence.indexOf("$");
+            String id = sentence.substring(0, index);
+            if (id.endsWith(",")) {
+                id = id.substring(0, id.length() - 1);
+            } else if (id.endsWith("/")) {
+                id = id.substring(id.indexOf('/') + 1, id.length() - 1);
+            }
+            deviceSession = getDeviceSession(channel, remoteAddress, id);
+            sentence = sentence.substring(index);
+        } else {
+            deviceSession = getDeviceSession(channel, remoteAddress);
+        }
+
+        if (sentence.startsWith("$PGID")) {
+            getDeviceSession(channel, remoteAddress, sentence.substring(6, sentence.length() - 3));
+        } else if (sentence.startsWith("$DEVID")) {
+            getDeviceSession(channel, remoteAddress, sentence.substring(7, sentence.lastIndexOf('*')));
+        } else if (sentence.startsWith("$PCPTI")) {
+            getDeviceSession(channel, remoteAddress, sentence.substring(7, sentence.indexOf(",", 7)));
+        } else if (sentence.startsWith("IMEI")) {
+            getDeviceSession(channel, remoteAddress, sentence.substring(5));
+        } else if (sentence.startsWith("$IMEI")) {
+            getDeviceSession(channel, remoteAddress, sentence.substring(6));
+        } else if (sentence.startsWith("$GPFID")) {
+            deviceSession = getDeviceSession(channel, remoteAddress, sentence.substring(7));
+            if (deviceSession != null && position != null) {
+                Position position = this.position;
+                position.setDeviceId(deviceSession.getDeviceId());
+                this.position = null;
+                return position;
+            }
+        } else if (sentence.matches("^[0-9A-F]+$")) {
+            getDeviceSession(channel, remoteAddress, sentence);
+        } else if (sentence.startsWith("$GPRMC")) {
+            return decodeGprmc(deviceSession, sentence, remoteAddress, channel);
+        } else if (sentence.startsWith("$GPGGA") && deviceSession != null) {
+            return decodeGpgga(deviceSession, sentence);
+        } else if (sentence.startsWith("$GPRMA") && deviceSession != null) {
+            return decodeGprma(deviceSession, sentence);
+        } else if (sentence.startsWith("$TRCCR") && deviceSession != null) {
+            return decodeTrccr(deviceSession, sentence);
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/T57FrameDecoder.java b/src/main/java/org/traccar/protocol/T57FrameDecoder.java
new file mode 100644
index 000000000..14ba31453
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/T57FrameDecoder.java
@@ -0,0 +1,49 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+import org.traccar.BaseFrameDecoder;
+
+import java.nio.charset.StandardCharsets;
+
+public class T57FrameDecoder extends BaseFrameDecoder {
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+        if (buf.readableBytes() < 10) {
+            return null;
+        }
+
+        String type = buf.toString(buf.readerIndex() + 5, 2, StandardCharsets.US_ASCII);
+        int count = type.equals("F3") ? 12 : 14;
+
+        int index = 0;
+        while (index >= 0 && count > 0) {
+            index = buf.indexOf(index + 1, buf.writerIndex(), (byte) '#');
+            if (index > 0) {
+                count -= 1;
+            }
+        }
+
+        return index > 0 ? buf.readRetainedSlice(index + 1 - buf.readerIndex()) : null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/T57Protocol.java b/src/main/java/org/traccar/protocol/T57Protocol.java
new file mode 100644
index 000000000..f67f82318
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/T57Protocol.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class T57Protocol extends BaseProtocol {
+
+    public T57Protocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new T57FrameDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new T57ProtocolDecoder(T57Protocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/T57ProtocolDecoder.java b/src/main/java/org/traccar/protocol/T57ProtocolDecoder.java
new file mode 100644
index 000000000..2a3cca3e4
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/T57ProtocolDecoder.java
@@ -0,0 +1,84 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class T57ProtocolDecoder extends BaseProtocolDecoder {
+
+    public T57ProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("*T57#")
+            .number("Fd#")                       // type
+            .number("([^#]+)#")                  // device id
+            .number("(dd)(dd)(dd)#")             // date (ddmmyy)
+            .number("(dd)(dd)(dd)#")             // time (hhmmss)
+            .number("(dd)(dd.d+)#")              // latitude
+            .expression("([NS])#")
+            .number("(ddd)(dd.d+)#")             // longitude
+            .expression("([EW])#")
+            .expression("[^#]+#")
+            .number("(d+.d+)#")                  // speed
+            .number("(d+.d+)#")                  // altitude
+            .expression("([AV])")                // valid
+            .number("d#")                        // fix type
+            .number("(d+.d+)#")                  // battery
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
+
+        position.setLatitude(parser.nextCoordinate());
+        position.setLongitude(parser.nextCoordinate());
+        position.setSpeed(parser.nextDouble());
+        position.setAltitude(parser.nextDouble());
+
+        position.setValid(parser.next().equals("A"));
+
+        position.set(Position.KEY_BATTERY, parser.nextDouble());
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/T800xProtocol.java b/src/main/java/org/traccar/protocol/T800xProtocol.java
new file mode 100644
index 000000000..85749d0cf
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/T800xProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LengthFieldBasedFrameDecoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+import org.traccar.model.Command;
+
+public class T800xProtocol extends BaseProtocol {
+
+    public T800xProtocol() {
+        setSupportedDataCommands(
+                Command.TYPE_CUSTOM);
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LengthFieldBasedFrameDecoder(1024, 3, 2, -5, 0));
+                pipeline.addLast(new T800xProtocolEncoder());
+                pipeline.addLast(new T800xProtocolDecoder(T800xProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/T800xProtocolDecoder.java b/src/main/java/org/traccar/protocol/T800xProtocolDecoder.java
new file mode 100644
index 000000000..dfb286257
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/T800xProtocolDecoder.java
@@ -0,0 +1,199 @@
+/*
+ * Copyright 2015 - 2019 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.ByteBufUtil;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.BcdUtil;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.CellTower;
+import org.traccar.model.Network;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+
+public class T800xProtocolDecoder extends BaseProtocolDecoder {
+
+    public T800xProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    public static final int MSG_LOGIN = 0x01;
+    public static final int MSG_GPS = 0x02;
+    public static final int MSG_HEARTBEAT = 0x03;
+    public static final int MSG_ALARM = 0x04;
+    public static final int MSG_COMMAND = 0x81;
+
+    private void sendResponse(Channel channel, short header, int type, int index, ByteBuf imei) {
+        if (channel != null) {
+            ByteBuf response = Unpooled.buffer(15);
+            response.writeShort(header);
+            response.writeByte(type);
+            response.writeShort(response.capacity()); // length
+            response.writeShort(index);
+            response.writeBytes(imei);
+            channel.writeAndFlush(new NetworkMessage(response, channel.remoteAddress()));
+        }
+    }
+
+    private String decodeAlarm(short value) {
+        switch (value) {
+            case 1:
+                return Position.ALARM_POWER_CUT;
+            case 2:
+                return Position.ALARM_LOW_BATTERY;
+            case 3:
+                return Position.ALARM_SOS;
+            case 4:
+                return Position.ALARM_OVERSPEED;
+            case 5:
+                return Position.ALARM_GEOFENCE_ENTER;
+            case 6:
+                return Position.ALARM_GEOFENCE_EXIT;
+            case 7:
+                return Position.ALARM_TOW;
+            case 8:
+            case 10:
+                return Position.ALARM_VIBRATION;
+            case 21:
+                return Position.ALARM_JAMMING;
+            case 23:
+                return Position.ALARM_POWER_RESTORED;
+            case 24:
+                return Position.ALARM_LOW_POWER;
+            default:
+                return null;
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        short header = buf.readShort();
+        int type = buf.readUnsignedByte();
+        buf.readUnsignedShort(); // length
+        int index = buf.readUnsignedShort();
+        ByteBuf imei = buf.readSlice(8);
+
+        DeviceSession deviceSession = getDeviceSession(
+                channel, remoteAddress, ByteBufUtil.hexDump(imei).substring(1));
+        if (deviceSession == null) {
+            return null;
+        }
+
+        sendResponse(channel, header, type, index, imei);
+
+        if (type == MSG_GPS || type == MSG_ALARM) {
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            position.set(Position.KEY_INDEX, index);
+
+            buf.readUnsignedShort(); // acc on interval
+            buf.readUnsignedShort(); // acc off interval
+            buf.readUnsignedByte(); // angle compensation
+            buf.readUnsignedShort(); // distance compensation
+
+            position.set(Position.KEY_RSSI, BitUtil.to(buf.readUnsignedShort(), 7));
+
+            int status = buf.readUnsignedByte();
+            position.set(Position.KEY_SATELLITES, BitUtil.to(status, 5));
+
+            buf.readUnsignedByte(); // gsensor manager status
+            buf.readUnsignedByte(); // other flags
+            buf.readUnsignedByte(); // heartbeat
+            buf.readUnsignedByte(); // relay status
+            buf.readUnsignedShort(); // drag alarm setting
+
+            int io = buf.readUnsignedShort();
+            position.set(Position.KEY_IGNITION, BitUtil.check(io, 14));
+            position.set("ac", BitUtil.check(io, 13));
+
+            position.set(Position.PREFIX_ADC + 1, buf.readUnsignedShort());
+            position.set(Position.PREFIX_ADC + 2, buf.readUnsignedShort());
+
+            position.set(Position.KEY_ALARM, decodeAlarm(buf.readUnsignedByte()));
+
+            buf.readUnsignedByte(); // reserved
+
+            position.set(Position.KEY_ODOMETER, buf.readUnsignedInt());
+
+            int battery = BcdUtil.readInteger(buf, 2);
+            if (battery == 0) {
+                battery = 100;
+            }
+            position.set(Position.KEY_BATTERY, battery);
+
+            DateBuilder dateBuilder = new DateBuilder()
+                    .setYear(BcdUtil.readInteger(buf, 2))
+                    .setMonth(BcdUtil.readInteger(buf, 2))
+                    .setDay(BcdUtil.readInteger(buf, 2))
+                    .setHour(BcdUtil.readInteger(buf, 2))
+                    .setMinute(BcdUtil.readInteger(buf, 2))
+                    .setSecond(BcdUtil.readInteger(buf, 2));
+
+            if (BitUtil.check(status, 6)) {
+
+                position.setValid(!BitUtil.check(status, 7));
+                position.setTime(dateBuilder.getDate());
+                position.setAltitude(buf.readFloatLE());
+                position.setLongitude(buf.readFloatLE());
+                position.setLatitude(buf.readFloatLE());
+                position.setSpeed(UnitsConverter.knotsFromKph(BcdUtil.readInteger(buf, 4) * 0.1));
+                position.setCourse(buf.readUnsignedShort());
+
+            } else {
+
+                getLastLocation(position, dateBuilder.getDate());
+
+                int mcc = buf.readUnsignedShortLE();
+                int mnc = buf.readUnsignedShortLE();
+
+                if (mcc != 0xffff && mnc != 0xffff) {
+                    Network network = new Network();
+                    for (int i = 0; i < 3; i++) {
+                        network.addCellTower(CellTower.from(
+                                mcc, mnc, buf.readUnsignedShortLE(), buf.readUnsignedShortLE()));
+                    }
+                    position.setNetwork(network);
+                }
+
+            }
+
+            if (buf.readableBytes() >= 2) {
+                position.set(Position.KEY_POWER, BcdUtil.readInteger(buf, 4) * 0.01);
+            }
+
+            return position;
+
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/T800xProtocolEncoder.java b/src/main/java/org/traccar/protocol/T800xProtocolEncoder.java
new file mode 100644
index 000000000..1d0f3dabe
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/T800xProtocolEncoder.java
@@ -0,0 +1,59 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import org.traccar.BaseProtocolEncoder;
+import org.traccar.helper.DataConverter;
+import org.traccar.model.Command;
+
+import java.nio.charset.StandardCharsets;
+
+public class T800xProtocolEncoder extends BaseProtocolEncoder {
+
+    public static final int MODE_SETTING = 0x01;
+    public static final int MODE_BROADCAST = 0x02;
+    public static final int MODE_FORWARD = 0x03;
+
+    private ByteBuf encodeContent(Command command, String content) {
+
+        ByteBuf buf = Unpooled.buffer();
+
+        buf.writeByte('#');
+        buf.writeByte('#');
+        buf.writeByte(T800xProtocolDecoder.MSG_COMMAND);
+        buf.writeShort(7 + 8 + 1 + content.length());
+        buf.writeShort(1); // serial number
+        buf.writeBytes(DataConverter.parseHex("0" + getUniqueId(command.getDeviceId())));
+        buf.writeByte(MODE_SETTING);
+        buf.writeBytes(content.getBytes(StandardCharsets.US_ASCII));
+
+        return buf;
+    }
+
+    @Override
+    protected Object encodeCommand(Command command) {
+
+        switch (command.getType()) {
+            case Command.TYPE_CUSTOM:
+                return encodeContent(command, command.getString(Command.KEY_DATA));
+            default:
+                return null;
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/TaipProtocol.java b/src/main/java/org/traccar/protocol/TaipProtocol.java
new file mode 100644
index 000000000..b8f40a183
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/TaipProtocol.java
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.CharacterDelimiterFrameDecoder;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class TaipProtocol extends BaseProtocol {
+
+    public TaipProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, '<'));
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new TaipProtocolDecoder(TaipProtocol.this));
+            }
+        });
+        addServer(new TrackerServer(true, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new TaipProtocolDecoder(TaipProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/TaipProtocolDecoder.java b/src/main/java/org/traccar/protocol/TaipProtocolDecoder.java
new file mode 100644
index 000000000..8a0cb870b
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/TaipProtocolDecoder.java
@@ -0,0 +1,287 @@
+/*
+ * Copyright 2013 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.Checksum;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.DateUtil;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.Date;
+import java.util.regex.Pattern;
+
+public class TaipProtocolDecoder extends BaseProtocolDecoder {
+
+    public TaipProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .groupBegin()
+            .expression("R[EP]V")                // type
+            .groupBegin()
+            .number("(dd)")                      // event
+            .number("(dddd)")                    // week
+            .number("(d)")                       // day
+            .groupEnd("?")
+            .number("(d{5})")                    // seconds
+            .or()
+            .expression("(?:RGP|RCQ|RCV|RBR)")   // type
+            .number("(dd)?")                     // event
+            .number("(dd)(dd)(dd)")              // date (mmddyy)
+            .number("(dd)(dd)(dd)")              // time (hhmmss)
+            .groupEnd()
+            .groupBegin()
+            .number("([-+]dd)(d{5})")            // latitude
+            .number("([-+]ddd)(d{5})")           // longitude
+            .or()
+            .number("([-+])(dd)(dd.dddd)")       // latitude
+            .number("([-+])(ddd)(dd.dddd)")      // longitude
+            .groupEnd()
+            .number("(ddd)")                     // speed
+            .number("(ddd)")                     // course
+            .groupBegin()
+            .number("([023])")                   // fix mode
+            .number("xx")                        // data age
+            .number("(xx)")                      // input
+            .number("(dd)")                      // event
+            .number("(dd)")                      // hdop
+            .or()
+            .groupBegin()
+            .number("(xx)")                      // input
+            .number("(xx)")                      // satellites
+            .number("(ddd)")                     // battery
+            .number("(x{8})")                    // odometer
+            .number("[01]")                      // gps power
+            .groupBegin()
+            .number("([023])")                   // fix mode
+            .number("(dd)")                      // pdop
+            .number("dd")                        // satellites
+            .number("xxxx")                      // data age
+            .number("[01]")                      // modem power
+            .number("[0-5]")                     // gsm status
+            .number("(dd)")                      // rssi
+            .number("([-+]dddd)")                // temperature 1
+            .number("xx")                        // seconds from last
+            .number("([-+]dddd)")                // temperature 2
+            .number("xx")                        // seconds from last
+            .groupEnd("?")
+            .groupEnd("?")
+            .groupEnd()
+            .any()
+            .compile();
+
+    private Date getTime(long week, long day, long seconds) {
+        DateBuilder dateBuilder = new DateBuilder()
+                .setDate(1980, 1, 6)
+                .addMillis(((week * 7 + day) * 24 * 60 * 60 + seconds) * 1000);
+        return dateBuilder.getDate();
+    }
+
+    private Date getTime(long seconds) {
+        DateBuilder dateBuilder = new DateBuilder(new Date())
+                .setTime(0, 0, 0, 0)
+                .addMillis(seconds * 1000);
+        return DateUtil.correctDay(dateBuilder.getDate());
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        String sentence = (String) msg;
+
+        int beginIndex = sentence.indexOf('>');
+        if (beginIndex != -1) {
+            sentence = sentence.substring(beginIndex + 1);
+        }
+
+        Parser parser = new Parser(PATTERN, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+
+        Boolean valid = null;
+        Integer event = null;
+
+        if (parser.hasNext(3)) {
+            event = parser.nextInt();
+            position.setTime(getTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0)));
+        } else if (parser.hasNext()) {
+            position.setTime(getTime(parser.nextInt(0)));
+        }
+
+        if (parser.hasNext()) {
+            event = parser.nextInt();
+        }
+
+        if (parser.hasNext(6)) {
+            position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
+        }
+
+        if (parser.hasNext(4)) {
+            position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_DEG));
+            position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_DEG));
+        }
+        if (parser.hasNext(6)) {
+            position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN));
+            position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN));
+        }
+
+        position.setSpeed(UnitsConverter.knotsFromMph(parser.nextDouble(0)));
+        position.setCourse(parser.nextDouble(0));
+
+        if (parser.hasNext(4)) {
+            valid = parser.nextInt() > 0;
+            int input = parser.nextHexInt();
+            position.set(Position.KEY_IGNITION, BitUtil.check(input, 7));
+            position.set(Position.KEY_INPUT, input);
+            event = parser.nextInt();
+            position.set(Position.KEY_HDOP, parser.nextInt());
+        }
+
+        if (parser.hasNext(4)) {
+            position.set(Position.KEY_INPUT, parser.nextHexInt(0));
+            position.set(Position.KEY_SATELLITES, parser.nextHexInt(0));
+            position.set(Position.KEY_BATTERY, parser.nextInt(0));
+            position.set(Position.KEY_ODOMETER, parser.nextLong(16, 0));
+        }
+
+        if (parser.hasNext(4)) {
+            valid = parser.nextInt() > 0;
+            position.set(Position.KEY_PDOP, parser.nextInt());
+            position.set(Position.KEY_RSSI, parser.nextInt());
+            position.set(Position.PREFIX_TEMP + 1, parser.nextInt() * 0.01);
+            position.set(Position.PREFIX_TEMP + 2, parser.nextInt() * 0.01);
+        }
+
+        position.setValid(valid == null || valid);
+
+        if (event != null) {
+            position.set(Position.KEY_EVENT, event);
+            switch (event) {
+                case 22:
+                    position.set(Position.KEY_ALARM, Position.ALARM_ACCELERATION);
+                    break;
+                case 23:
+                    position.set(Position.KEY_ALARM, Position.ALARM_BRAKING);
+                    break;
+                case 24:
+                    position.set(Position.KEY_ALARM, Position.ALARM_ACCIDENT);
+                    break;
+                case 26:
+                case 28:
+                    position.set(Position.KEY_ALARM, Position.ALARM_CORNERING);
+                    break;
+                default:
+                    break;
+            }
+        }
+
+        String[] attributes = null;
+        beginIndex = sentence.indexOf(';');
+        if (beginIndex != -1) {
+            int endIndex = sentence.indexOf('<', beginIndex);
+            if (endIndex == -1) {
+                endIndex = sentence.length();
+            }
+            attributes = sentence.substring(beginIndex, endIndex).split(";");
+        }
+
+        return decodeAttributes(channel, remoteAddress, position, attributes);
+    }
+
+    private Position decodeAttributes(
+            Channel channel, SocketAddress remoteAddress, Position position, String[] attributes) {
+
+        String uniqueId = null;
+        DeviceSession deviceSession = null;
+        String messageIndex = null;
+
+        if (attributes != null) {
+            for (String attribute : attributes) {
+                int index = attribute.indexOf('=');
+                if (index != -1) {
+                    String key = attribute.substring(0, index).toLowerCase();
+                    String value = attribute.substring(index + 1);
+                    switch (key) {
+                        case "id":
+                            uniqueId = value;
+                            deviceSession = getDeviceSession(channel, remoteAddress, value);
+                            if (deviceSession != null) {
+                                position.setDeviceId(deviceSession.getDeviceId());
+                            }
+                            break;
+                        case "io":
+                            position.set(Position.KEY_IGNITION, BitUtil.check(value.charAt(0) - '0', 0));
+                            position.set(Position.KEY_CHARGE, BitUtil.check(value.charAt(0) - '0', 1));
+                            position.set(Position.KEY_OUTPUT, value.charAt(1) - '0');
+                            position.set(Position.KEY_INPUT, value.charAt(2) - '0');
+                            break;
+                        case "ix":
+                            position.set(Position.PREFIX_IO + 1, value);
+                            break;
+                        case "ad":
+                            position.set(Position.PREFIX_ADC + 1, Integer.parseInt(value));
+                            break;
+                        case "sv":
+                            position.set(Position.KEY_SATELLITES, Integer.parseInt(value));
+                            break;
+                        case "bl":
+                            position.set(Position.KEY_BATTERY, Integer.parseInt(value) * 0.001);
+                            break;
+                        case "vo":
+                            position.set(Position.KEY_ODOMETER, Long.parseLong(value));
+                            break;
+                        default:
+                            position.set(key, value);
+                            break;
+                    }
+                } else if (attribute.startsWith("#")) {
+                    messageIndex = attribute;
+                }
+            }
+        }
+
+        if (deviceSession != null) {
+            if (channel != null) {
+                if (messageIndex != null) {
+                    String response = ">ACK;ID=" + uniqueId + ";" + messageIndex + ";*";
+                    response += String.format("%02X", Checksum.xor(response)) + "<";
+                    channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
+                } else {
+                    channel.writeAndFlush(new NetworkMessage(uniqueId, remoteAddress));
+                }
+            }
+            return position;
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/TekFrameDecoder.java b/src/main/java/org/traccar/protocol/TekFrameDecoder.java
new file mode 100644
index 000000000..44d2c590e
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/TekFrameDecoder.java
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+import org.traccar.BaseFrameDecoder;
+import org.traccar.helper.BitUtil;
+
+public class TekFrameDecoder extends BaseFrameDecoder {
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+        if (buf.readableBytes() < 17) {
+            return null;
+        }
+
+        int length = 17 + buf.getUnsignedByte(16) + (BitUtil.from(buf.getUnsignedByte(15), 6) << 6);
+        if (buf.readableBytes() >= length) {
+            return buf.readBytes(length);
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/TekProtocol.java b/src/main/java/org/traccar/protocol/TekProtocol.java
new file mode 100644
index 000000000..c1d78e6f5
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/TekProtocol.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class TekProtocol extends BaseProtocol {
+
+    public TekProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new TekFrameDecoder());
+                pipeline.addLast(new TekProtocolDecoder(TekProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/TekProtocolDecoder.java b/src/main/java/org/traccar/protocol/TekProtocolDecoder.java
new file mode 100644
index 000000000..a9101e65f
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/TekProtocolDecoder.java
@@ -0,0 +1,139 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.ByteBufUtil;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.regex.Pattern;
+
+public class TekProtocolDecoder extends BaseProtocolDecoder {
+
+    public TekProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .number(",d+,")
+            .number("(dd)(dd)(dd).d,")           // time (hhmmss)
+            .number("(dd)(dd.d+)")               // latitude
+            .expression("([NS]),")
+            .number("(ddd)(dd.d+)")              // longitude
+            .expression("([EW]),")
+            .number("(d+.d+),")                  // hdop
+            .number("(d+.d+),")                  // altitude
+            .number("(d+),")                     // fix mode
+            .number("(d+.d+),")                  // course
+            .number("d+.d+,")                    // speed km
+            .number("(d+.d+),")                  // speed kn
+            .number("(dd)(dd)(dd),")             // date (ddmmyy)
+            .number("(d+),")                     // satellites
+            .any()
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        buf.readUnsignedByte(); // product type
+        buf.readUnsignedByte(); // hardware version
+        buf.readUnsignedByte(); // firmware version
+        buf.readUnsignedByte(); // contact reason
+        buf.readUnsignedByte(); // alarm / status
+        buf.readUnsignedByte(); // rssi
+        buf.readUnsignedByte(); // battery / status
+
+        String imei = ByteBufUtil.hexDump(buf.readBytes(8)).substring(1);
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        int type = BitUtil.to(buf.readUnsignedByte(), 6);
+        buf.readUnsignedByte(); // length
+
+        if (type == 4 || type == 8) {
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            int count = buf.readUnsignedShort();
+            buf.readUnsignedByte(); // hours / tickets
+            buf.readUnsignedByte(); // error code
+            buf.readUnsignedByte(); // reserved
+            buf.readUnsignedByte(); // logger speed
+            buf.readUnsignedByte(); // login time
+            buf.readUnsignedByte(); // minutes
+
+            for (int i = 0; i < count; i++) {
+                position.set("rssi" + (i + 1), buf.readUnsignedByte());
+                position.set("temp" + (i + 1), buf.readUnsignedByte() - 30);
+                int data = buf.readUnsignedShort();
+                position.set("src" + (i + 1), BitUtil.from(data, 10));
+                position.set("ullage" + (i + 1), BitUtil.to(data, 10));
+            }
+
+            return position;
+
+        } else if (type == 17) {
+
+            String sentence = buf.toString(StandardCharsets.US_ASCII);
+
+            Parser parser = new Parser(PATTERN, sentence);
+            if (!parser.matches()) {
+                return null;
+            }
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            DateBuilder dateBuilder = new DateBuilder()
+                    .setTime(parser.nextInt(), parser.nextInt(), parser.nextInt());
+
+            position.setLatitude(parser.nextCoordinate());
+            position.setLongitude(parser.nextCoordinate());
+
+            position.set(Position.KEY_HDOP, parser.nextDouble());
+
+            position.setAltitude(parser.nextDouble());
+            position.setValid(parser.nextInt() > 0);
+            position.setCourse(parser.nextDouble());
+            position.setSpeed(parser.nextDouble());
+
+            dateBuilder.setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt());
+            position.setTime(dateBuilder.getDate());
+
+            return position;
+
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/TelemaxProtocol.java b/src/main/java/org/traccar/protocol/TelemaxProtocol.java
new file mode 100644
index 000000000..838da9df1
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/TelemaxProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LineBasedFrameDecoder;
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class TelemaxProtocol extends BaseProtocol {
+
+    public TelemaxProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LineBasedFrameDecoder(1024));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new TelemaxProtocolDecoder(TelemaxProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/TelemaxProtocolDecoder.java b/src/main/java/org/traccar/protocol/TelemaxProtocolDecoder.java
new file mode 100644
index 000000000..9369ab101
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/TelemaxProtocolDecoder.java
@@ -0,0 +1,112 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.LinkedList;
+import java.util.List;
+
+public class TelemaxProtocolDecoder extends BaseProtocolDecoder {
+
+    public TelemaxProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private String readValue(String sentence, int[] index, int length) {
+        String value = sentence.substring(index[0], index[0] + length);
+        index[0] += length;
+        return value;
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        String sentence = (String) msg;
+
+        if (sentence.startsWith("%")) {
+            int length = Integer.parseInt(sentence.substring(1, 3));
+            getDeviceSession(channel, remoteAddress, sentence.substring(3, 3 + length));
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        int[] index = {0};
+
+        if (!readValue(sentence, index, 1).equals("Y")) {
+            return null;
+        }
+
+        readValue(sentence, index, 8); // command id
+        readValue(sentence, index, 6); // password
+        readValue(sentence, index, Integer.parseInt(readValue(sentence, index, 2), 16)); // unit id
+        readValue(sentence, index, 2); // frame count
+
+        readValue(sentence, index, 2); // data format
+
+        int interval = Integer.parseInt(readValue(sentence, index, 4), 16);
+
+        readValue(sentence, index, 2); // info flags
+        readValue(sentence, index, 2); // version
+
+        int count = Integer.parseInt(readValue(sentence, index, 2), 16);
+
+        Date time = null;
+        List<Position> positions = new LinkedList<>();
+
+        for (int i = 0; i < count; i++) {
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            int speed = Integer.parseInt(readValue(sentence, index, 2), 16);
+
+            position.setValid(BitUtil.check(speed, 7));
+            position.setSpeed(BitUtil.to(speed, 7));
+
+            position.setLongitude((Integer.parseInt(readValue(sentence, index, 6), 16) - 5400000) / 30000.0);
+            position.setLatitude((Integer.parseInt(readValue(sentence, index, 6), 16) - 5400000) / 30000.0);
+
+            if (i == 0 | i == count - 1) {
+                time = new SimpleDateFormat("yyMMddHHmmss").parse(readValue(sentence, index, 12));
+                position.set(Position.KEY_STATUS, readValue(sentence, index, 8));
+            } else {
+                time = new Date(time.getTime() + interval * 1000);
+            }
+
+            position.setTime(time);
+
+            positions.add(position);
+
+        }
+
+        return positions;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/TelicFrameDecoder.java b/src/main/java/org/traccar/protocol/TelicFrameDecoder.java
new file mode 100644
index 000000000..d1fef1b5b
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/TelicFrameDecoder.java
@@ -0,0 +1,55 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseFrameDecoder;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+
+public class TelicFrameDecoder extends BaseFrameDecoder {
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+        if (buf.readableBytes() < 4) {
+            return null;
+        }
+
+        long length = buf.getUnsignedIntLE(buf.readerIndex());
+
+        if (length < 1024) {
+            if (buf.readableBytes() >= length + 4) {
+                buf.readUnsignedIntLE();
+                return buf.readRetainedSlice((int) length);
+            }
+        } else {
+            int endIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) 0);
+            if (endIndex >= 0) {
+                ByteBuf frame = buf.readRetainedSlice(endIndex - buf.readerIndex());
+                buf.readByte();
+                if (frame.readableBytes() > 0) {
+                    return frame;
+                }
+            }
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/TelicProtocol.java b/src/main/java/org/traccar/protocol/TelicProtocol.java
new file mode 100644
index 000000000..991befa19
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/TelicProtocol.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class TelicProtocol extends BaseProtocol {
+
+    public TelicProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new TelicFrameDecoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new TelicProtocolDecoder(TelicProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/TelicProtocolDecoder.java b/src/main/java/org/traccar/protocol/TelicProtocolDecoder.java
new file mode 100644
index 000000000..6d5e8f21e
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/TelicProtocolDecoder.java
@@ -0,0 +1,135 @@
+/*
+ * Copyright 2014 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class TelicProtocolDecoder extends BaseProtocolDecoder {
+
+    public TelicProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .number("dddd")
+            .number("(d{6}|d{15})")              // device id
+            .number("(d{1,2}),")                 // type
+            .number("d{12},")                    // event time
+            .number("d+,")
+            .number("(dd)(dd)(dd)")              // date (ddmmyy)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .groupBegin()
+            .number("(ddd)(dd)(dddd),")          // longitude
+            .number("(dd)(dd)(dddd),")           // latitude
+            .or()
+            .number("(-?d+),")                   // longitude
+            .number("(-?d+),")                   // latitude
+            .groupEnd()
+            .number("(d),")                      // validity
+            .number("(d+),")                     // speed
+            .number("(d+),")                     // course
+            .number("(d+)?,")                    // satellites
+            .expression("(?:[^,]*,){7}")
+            .number("(d+),")                     // battery
+            .any()
+            .compile();
+
+    private String decodeAlarm(int eventId) {
+
+        switch (eventId) {
+            case 1:
+                return Position.ALARM_POWER_ON;
+            case 2:
+                return Position.ALARM_SOS;
+            case 5:
+                return Position.ALARM_POWER_OFF;
+            case 7:
+                return Position.ALARM_GEOFENCE_ENTER;
+            case 8:
+                return Position.ALARM_GEOFENCE_EXIT;
+            case 22:
+                return Position.ALARM_LOW_BATTERY;
+            case 25:
+                return Position.ALARM_MOVEMENT;
+            default:
+                return null;
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        int event = parser.nextInt(0);
+        position.set(Position.KEY_EVENT, event);
+
+        position.set(Position.KEY_ALARM, decodeAlarm(event));
+
+        if (event == 11) {
+            position.set(Position.KEY_IGNITION, true);
+        } else if (event == 12) {
+            position.set(Position.KEY_IGNITION, false);
+        }
+
+        position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
+
+        if (parser.hasNext(6)) {
+            position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_MIN_MIN));
+            position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_MIN_MIN));
+        }
+
+        if (parser.hasNext(2)) {
+            position.setLongitude(parser.nextDouble(0) / 10000);
+            position.setLatitude(parser.nextDouble(0) / 10000);
+        }
+
+        position.setValid(parser.nextInt(0) != 1);
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
+        position.setCourse(parser.nextDouble(0));
+
+        if (parser.hasNext()) {
+            position.set(Position.KEY_SATELLITES, parser.nextInt(0));
+        }
+
+        position.set(Position.KEY_BATTERY, parser.nextInt(0));
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/TeltonikaFrameDecoder.java b/src/main/java/org/traccar/protocol/TeltonikaFrameDecoder.java
new file mode 100644
index 000000000..4d4d79d8d
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/TeltonikaFrameDecoder.java
@@ -0,0 +1,53 @@
+/*
+ * Copyright 2013 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseFrameDecoder;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+
+public class TeltonikaFrameDecoder extends BaseFrameDecoder {
+
+    private static final int MESSAGE_MINIMUM_LENGTH = 12;
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+        // Check minimum length
+        if (buf.readableBytes() < MESSAGE_MINIMUM_LENGTH) {
+            return null;
+        }
+
+        // Read packet
+        int length = buf.getUnsignedShort(buf.readerIndex());
+        if (length > 0) {
+            if (buf.readableBytes() >= (length + 2)) {
+                return buf.readRetainedSlice(length + 2);
+            }
+        } else {
+            int dataLength = buf.getInt(buf.readerIndex() + 4);
+            if (buf.readableBytes() >= (dataLength + 12)) {
+                return buf.readRetainedSlice(dataLength + 12);
+            }
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/TeltonikaProtocol.java b/src/main/java/org/traccar/protocol/TeltonikaProtocol.java
new file mode 100644
index 000000000..eef9662d7
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/TeltonikaProtocol.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+import org.traccar.model.Command;
+
+public class TeltonikaProtocol extends BaseProtocol {
+
+    public TeltonikaProtocol() {
+        setSupportedDataCommands(
+                Command.TYPE_CUSTOM);
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new TeltonikaFrameDecoder());
+                pipeline.addLast(new TeltonikaProtocolEncoder());
+                pipeline.addLast(new TeltonikaProtocolDecoder(TeltonikaProtocol.this, false));
+            }
+        });
+        addServer(new TrackerServer(true, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new TeltonikaProtocolEncoder());
+                pipeline.addLast(new TeltonikaProtocolDecoder(TeltonikaProtocol.this, true));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/TeltonikaProtocolDecoder.java b/src/main/java/org/traccar/protocol/TeltonikaProtocolDecoder.java
new file mode 100644
index 000000000..974d2c106
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/TeltonikaProtocolDecoder.java
@@ -0,0 +1,597 @@
+/*
+ * Copyright 2013 - 2019 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.ByteBufUtil;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.Context;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.Checksum;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.CellTower;
+import org.traccar.model.Network;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.Date;
+import java.util.HashMap;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
+
+public class TeltonikaProtocolDecoder extends BaseProtocolDecoder {
+
+    private static final int IMAGE_PACKET_MAX = 2048;
+
+    private boolean connectionless;
+    private boolean extended;
+    private Map<Long, ByteBuf> photos = new HashMap<>();
+
+    public void setExtended(boolean extended) {
+        this.extended = extended;
+    }
+
+    public TeltonikaProtocolDecoder(Protocol protocol, boolean connectionless) {
+        super(protocol);
+        this.connectionless = connectionless;
+        this.extended = Context.getConfig().getBoolean(getProtocolName() + ".extended");
+    }
+
+    private void parseIdentification(Channel channel, SocketAddress remoteAddress, ByteBuf buf) {
+
+        int length = buf.readUnsignedShort();
+        String imei = buf.toString(buf.readerIndex(), length, StandardCharsets.US_ASCII);
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
+
+        if (channel != null) {
+            ByteBuf response = Unpooled.buffer(1);
+            if (deviceSession != null) {
+                response.writeByte(1);
+            } else {
+                response.writeByte(0);
+            }
+            channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
+        }
+    }
+
+    public static final int CODEC_GH3000 = 0x07;
+    public static final int CODEC_8 = 0x08;
+    public static final int CODEC_8_EXT = 0x8E;
+    public static final int CODEC_12 = 0x0C;
+    public static final int CODEC_16 = 0x10;
+
+    private void sendImageRequest(Channel channel, SocketAddress remoteAddress, long id, int offset, int size) {
+        if (channel != null) {
+            ByteBuf response = Unpooled.buffer();
+            response.writeInt(0);
+            response.writeShort(0);
+            response.writeShort(19); // length
+            response.writeByte(CODEC_12);
+            response.writeByte(1); // nod
+            response.writeByte(0x0D); // camera
+            response.writeInt(11); // payload length
+            response.writeByte(2); // command
+            response.writeInt((int) id);
+            response.writeInt(offset);
+            response.writeShort(size);
+            response.writeByte(1); // nod
+            response.writeShort(0);
+            response.writeShort(Checksum.crc16(
+                    Checksum.CRC16_IBM, response.nioBuffer(8, response.readableBytes() - 10)));
+            channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
+        }
+    }
+
+    private void decodeSerial(Channel channel, SocketAddress remoteAddress, Position position, ByteBuf buf) {
+
+        getLastLocation(position, null);
+
+        int type = buf.readUnsignedByte();
+        if (type == 0x0D) {
+
+            buf.readInt(); // length
+            int subtype = buf.readUnsignedByte();
+            if (subtype == 0x01) {
+
+                long photoId = buf.readUnsignedInt();
+                ByteBuf photo = Unpooled.buffer(buf.readInt());
+                photos.put(photoId, photo);
+                sendImageRequest(
+                        channel, remoteAddress, photoId,
+                        0, Math.min(IMAGE_PACKET_MAX, photo.capacity()));
+
+            } else if (subtype == 0x02) {
+
+                long photoId = buf.readUnsignedInt();
+                buf.readInt(); // offset
+                ByteBuf photo = photos.get(photoId);
+                photo.writeBytes(buf, buf.readUnsignedShort());
+                if (photo.writableBytes() > 0) {
+                    sendImageRequest(
+                            channel, remoteAddress, photoId,
+                            photo.writerIndex(), Math.min(IMAGE_PACKET_MAX, photo.writableBytes()));
+                } else {
+                    String uniqueId = Context.getIdentityManager().getById(position.getDeviceId()).getUniqueId();
+                    photos.remove(photoId);
+                    try {
+                        position.set(Position.KEY_IMAGE, Context.getMediaManager().writeFile(uniqueId, photo, "jpg"));
+                    } finally {
+                        photo.release();
+                    }
+                }
+
+            }
+
+        } else {
+
+            position.set(Position.KEY_TYPE, type);
+            position.set(Position.KEY_RESULT, buf.readSlice(buf.readInt()).toString(StandardCharsets.US_ASCII));
+
+        }
+    }
+
+    private long readValue(ByteBuf buf, int length, boolean signed) {
+        switch (length) {
+            case 1:
+                return signed ? buf.readByte() : buf.readUnsignedByte();
+            case 2:
+                return signed ? buf.readShort() : buf.readUnsignedShort();
+            case 4:
+                return signed ? buf.readInt() : buf.readUnsignedInt();
+            default:
+                return buf.readLong();
+        }
+    }
+
+    private void decodeOtherParameter(Position position, int id, ByteBuf buf, int length) {
+        switch (id) {
+            case 1:
+            case 2:
+            case 3:
+            case 4:
+                position.set("di" + id, readValue(buf, length, false));
+                break;
+            case 9:
+                position.set(Position.PREFIX_ADC + 1, readValue(buf, length, false));
+                break;
+            case 17:
+                position.set("axisX", readValue(buf, length, true));
+                break;
+            case 18:
+                position.set("axisY", readValue(buf, length, true));
+                break;
+            case 19:
+                position.set("axisZ", readValue(buf, length, true));
+                break;
+            case 21:
+                position.set(Position.KEY_RSSI, readValue(buf, length, false));
+                break;
+            case 25:
+            case 26:
+            case 27:
+            case 28:
+                position.set(Position.PREFIX_TEMP + (id - 24), readValue(buf, length, true) * 0.1);
+                break;
+            case 66:
+                position.set(Position.KEY_POWER, readValue(buf, length, false) * 0.001);
+                break;
+            case 67:
+                position.set(Position.KEY_BATTERY, readValue(buf, length, false) * 0.001);
+                break;
+            case 69:
+                position.set("gpsStatus", readValue(buf, length, false));
+                break;
+            case 72:
+            case 73:
+            case 74:
+                position.set(Position.PREFIX_TEMP + (id - 71), readValue(buf, length, true) * 0.1);
+                break;
+            case 78:
+                long driverUniqueId = readValue(buf, length, false);
+                if (driverUniqueId != 0) {
+                    position.set(Position.KEY_DRIVER_UNIQUE_ID, String.format("%016X", driverUniqueId));
+                }
+                break;
+            case 80:
+                position.set("workMode", readValue(buf, length, false));
+                break;
+            case 129:
+            case 130:
+            case 131:
+            case 132:
+            case 133:
+            case 134:
+                String driver = id == 129 || id == 132 ? "" : position.getString("driver1");
+                position.set("driver" + (id >= 132 ? 2 : 1),
+                        driver + buf.readSlice(length).toString(StandardCharsets.US_ASCII).trim());
+                break;
+            case 179:
+                position.set(Position.PREFIX_OUT + 1, readValue(buf, length, false) == 1);
+                break;
+            case 180:
+                position.set(Position.PREFIX_OUT + 2, readValue(buf, length, false) == 1);
+                break;
+            case 181:
+                position.set(Position.KEY_PDOP, readValue(buf, length, false) * 0.1);
+                break;
+            case 182:
+                position.set(Position.KEY_HDOP, readValue(buf, length, false) * 0.1);
+                break;
+            case 236:
+                if (readValue(buf, length, false) == 1) {
+                    position.set(Position.KEY_ALARM, Position.ALARM_OVERSPEED);
+                }
+                break;
+            case 237:
+                position.set(Position.KEY_MOTION, readValue(buf, length, false) == 0);
+                break;
+            case 238:
+                switch ((int) readValue(buf, length, false)) {
+                    case 1:
+                        position.set(Position.KEY_ALARM, Position.ALARM_ACCELERATION);
+                        break;
+                    case 2:
+                        position.set(Position.KEY_ALARM, Position.ALARM_BRAKING);
+                        break;
+                    case 3:
+                        position.set(Position.KEY_ALARM, Position.ALARM_CORNERING);
+                        break;
+                    default:
+                        break;
+                }
+                break;
+            case 239:
+                position.set(Position.KEY_IGNITION, readValue(buf, length, false) == 1);
+                break;
+            case 240:
+                position.set(Position.KEY_MOTION, readValue(buf, length, false) == 1);
+                break;
+            case 241:
+                position.set(Position.KEY_OPERATOR, readValue(buf, length, false));
+                break;
+            default:
+                position.set(Position.PREFIX_IO + id, readValue(buf, length, false));
+                break;
+        }
+    }
+
+    private void decodeGh3000Parameter(Position position, int id, ByteBuf buf, int length) {
+        switch (id) {
+            case 1:
+                position.set(Position.KEY_BATTERY_LEVEL, readValue(buf, length, false));
+                break;
+            case 2:
+                position.set("usbConnected", readValue(buf, length, false) == 1);
+                break;
+            case 5:
+                position.set("uptime", readValue(buf, length, false));
+                break;
+            case 20:
+                position.set(Position.KEY_HDOP, readValue(buf, length, false) * 0.1);
+                break;
+            case 21:
+                position.set(Position.KEY_VDOP, readValue(buf, length, false) * 0.1);
+                break;
+            case 22:
+                position.set(Position.KEY_PDOP, readValue(buf, length, false) * 0.1);
+                break;
+            case 67:
+                position.set(Position.KEY_BATTERY, readValue(buf, length, false) * 0.001);
+                break;
+            case 221:
+                position.set("button", readValue(buf, length, false));
+                break;
+            case 222:
+                if (readValue(buf, length, false) == 1) {
+                    position.set(Position.KEY_ALARM, Position.ALARM_SOS);
+                }
+                break;
+            case 240:
+                position.set(Position.KEY_MOTION, readValue(buf, length, false) == 1);
+                break;
+            case 244:
+                position.set(Position.KEY_ROAMING, readValue(buf, length, false) == 1);
+                break;
+            default:
+                position.set(Position.PREFIX_IO + id, readValue(buf, length, false));
+                break;
+        }
+    }
+
+    private void decodeParameter(Position position, int id, ByteBuf buf, int length, int codec) {
+        if (codec == CODEC_GH3000) {
+            decodeGh3000Parameter(position, id, buf, length);
+        } else {
+            decodeOtherParameter(position, id, buf, length);
+        }
+    }
+
+    private void decodeNetwork(Position position) {
+        long cid = position.getLong(Position.PREFIX_IO + 205);
+        int lac = position.getInteger(Position.PREFIX_IO + 206);
+        if (cid != 0 && lac != 0) {
+            CellTower cellTower = CellTower.fromLacCid(lac, cid);
+            long operator = position.getInteger(Position.KEY_OPERATOR);
+            if (operator != 0) {
+                cellTower.setOperator(operator);
+            }
+            position.setNetwork(new Network(cellTower));
+        }
+    }
+
+    private int readExtByte(ByteBuf buf, int codec, int... codecs) {
+        boolean ext = false;
+        for (int c : codecs) {
+            if (codec == c) {
+                ext = true;
+                break;
+            }
+        }
+        if (ext) {
+            return buf.readUnsignedShort();
+        } else {
+            return buf.readUnsignedByte();
+        }
+    }
+
+    private void decodeLocation(Position position, ByteBuf buf, int codec) {
+
+        int globalMask = 0x0f;
+
+        if (codec == CODEC_GH3000) {
+
+            long time = buf.readUnsignedInt() & 0x3fffffff;
+            time += 1167609600; // 2007-01-01 00:00:00
+
+            globalMask = buf.readUnsignedByte();
+            if (BitUtil.check(globalMask, 0)) {
+
+                position.setTime(new Date(time * 1000));
+
+                int locationMask = buf.readUnsignedByte();
+
+                if (BitUtil.check(locationMask, 0)) {
+                    position.setLatitude(buf.readFloat());
+                    position.setLongitude(buf.readFloat());
+                }
+
+                if (BitUtil.check(locationMask, 1)) {
+                    position.setAltitude(buf.readUnsignedShort());
+                }
+
+                if (BitUtil.check(locationMask, 2)) {
+                    position.setCourse(buf.readUnsignedByte() * 360.0 / 256);
+                }
+
+                if (BitUtil.check(locationMask, 3)) {
+                    position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte()));
+                }
+
+                if (BitUtil.check(locationMask, 4)) {
+                    position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
+                }
+
+                if (BitUtil.check(locationMask, 5)) {
+                    CellTower cellTower = CellTower.fromLacCid(buf.readUnsignedShort(), buf.readUnsignedShort());
+
+                    if (BitUtil.check(locationMask, 6)) {
+                        cellTower.setSignalStrength((int) buf.readUnsignedByte());
+                    }
+
+                    if (BitUtil.check(locationMask, 7)) {
+                        cellTower.setOperator(buf.readUnsignedInt());
+                    }
+
+                    position.setNetwork(new Network(cellTower));
+
+                } else {
+                    if (BitUtil.check(locationMask, 6)) {
+                        position.set(Position.KEY_RSSI, buf.readUnsignedByte());
+                    }
+                    if (BitUtil.check(locationMask, 7)) {
+                        position.set(Position.KEY_OPERATOR, buf.readUnsignedInt());
+                    }
+                }
+
+            } else {
+
+                getLastLocation(position, new Date(time * 1000));
+
+            }
+
+        } else {
+
+            position.setTime(new Date(buf.readLong()));
+
+            position.set("priority", buf.readUnsignedByte());
+
+            position.setLongitude(buf.readInt() / 10000000.0);
+            position.setLatitude(buf.readInt() / 10000000.0);
+            position.setAltitude(buf.readShort());
+            position.setCourse(buf.readUnsignedShort());
+
+            int satellites = buf.readUnsignedByte();
+            position.set(Position.KEY_SATELLITES, satellites);
+
+            position.setValid(satellites != 0);
+
+            position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShort()));
+
+            position.set(Position.KEY_EVENT, readExtByte(buf, codec, CODEC_8_EXT, CODEC_16));
+            if (codec == CODEC_16) {
+                buf.readUnsignedByte(); // generation type
+            }
+
+            readExtByte(buf, codec, CODEC_8_EXT); // total IO data records
+
+        }
+
+        // Read 1 byte data
+        if (BitUtil.check(globalMask, 1)) {
+            int cnt = readExtByte(buf, codec, CODEC_8_EXT);
+            for (int j = 0; j < cnt; j++) {
+                decodeParameter(position, readExtByte(buf, codec, CODEC_8_EXT, CODEC_16), buf, 1, codec);
+            }
+        }
+
+        // Read 2 byte data
+        if (BitUtil.check(globalMask, 2)) {
+            int cnt = readExtByte(buf, codec, CODEC_8_EXT);
+            for (int j = 0; j < cnt; j++) {
+                decodeParameter(position, readExtByte(buf, codec, CODEC_8_EXT, CODEC_16), buf, 2, codec);
+            }
+        }
+
+        // Read 4 byte data
+        if (BitUtil.check(globalMask, 3)) {
+            int cnt = readExtByte(buf, codec, CODEC_8_EXT);
+            for (int j = 0; j < cnt; j++) {
+                decodeParameter(position, readExtByte(buf, codec, CODEC_8_EXT, CODEC_16), buf, 4, codec);
+            }
+        }
+
+        // Read 8 byte data
+        if (codec == CODEC_8 || codec == CODEC_8_EXT || codec == CODEC_16) {
+            int cnt = readExtByte(buf, codec, CODEC_8_EXT);
+            for (int j = 0; j < cnt; j++) {
+                decodeOtherParameter(position, readExtByte(buf, codec, CODEC_8_EXT, CODEC_16), buf, 8);
+            }
+        }
+
+        // Read 16 byte data
+        if (extended) {
+            int cnt = readExtByte(buf, codec, CODEC_8_EXT);
+            for (int j = 0; j < cnt; j++) {
+                int id = readExtByte(buf, codec, CODEC_8_EXT, CODEC_16);
+                position.set(Position.PREFIX_IO + id, ByteBufUtil.hexDump(buf.readSlice(16)));
+            }
+        }
+
+        // Read X byte data
+        if (codec == CODEC_8_EXT) {
+            int cnt = buf.readUnsignedShort();
+            for (int j = 0; j < cnt; j++) {
+                int id = buf.readUnsignedShort();
+                int length = buf.readUnsignedShort();
+                if (id == 256) {
+                    position.set(Position.KEY_VIN, buf.readSlice(length).toString(StandardCharsets.US_ASCII));
+                } else {
+                    position.set(Position.PREFIX_IO + id, ByteBufUtil.hexDump(buf.readSlice(length)));
+                }
+            }
+        }
+
+        decodeNetwork(position);
+
+    }
+
+    private List<Position> parseData(
+            Channel channel, SocketAddress remoteAddress, ByteBuf buf, int locationPacketId, String... imei) {
+        List<Position> positions = new LinkedList<>();
+
+        if (!connectionless) {
+            buf.readUnsignedInt(); // data length
+        }
+
+        int codec = buf.readUnsignedByte();
+        int count = buf.readUnsignedByte();
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
+
+        if (deviceSession == null) {
+            return null;
+        }
+
+        for (int i = 0; i < count; i++) {
+            Position position = new Position(getProtocolName());
+
+            position.setDeviceId(deviceSession.getDeviceId());
+            position.setValid(true);
+
+            if (codec == CODEC_12) {
+                decodeSerial(channel, remoteAddress, position, buf);
+            } else {
+                decodeLocation(position, buf, codec);
+            }
+
+            if (!position.getOutdated() || !position.getAttributes().isEmpty()) {
+                positions.add(position);
+            }
+        }
+
+        if (channel != null) {
+            if (connectionless) {
+                ByteBuf response = Unpooled.buffer();
+                response.writeShort(5);
+                response.writeShort(0);
+                response.writeByte(0x01);
+                response.writeByte(locationPacketId);
+                response.writeByte(count);
+                channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
+            } else {
+                ByteBuf response = Unpooled.buffer();
+                response.writeInt(count);
+                channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
+            }
+        }
+
+        return positions.isEmpty() ? null : positions;
+    }
+
+    @Override
+    protected Object decode(Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        if (connectionless) {
+            return decodeUdp(channel, remoteAddress, buf);
+        } else {
+            return decodeTcp(channel, remoteAddress, buf);
+        }
+    }
+
+    private Object decodeTcp(Channel channel, SocketAddress remoteAddress, ByteBuf buf) throws Exception {
+
+        if (buf.getUnsignedShort(0) > 0) {
+            parseIdentification(channel, remoteAddress, buf);
+        } else {
+            buf.skipBytes(4);
+            return parseData(channel, remoteAddress, buf, 0);
+        }
+
+        return null;
+    }
+
+    private Object decodeUdp(Channel channel, SocketAddress remoteAddress, ByteBuf buf) throws Exception {
+
+        buf.readUnsignedShort(); // length
+        buf.readUnsignedShort(); // packet id
+        buf.readUnsignedByte(); // packet type
+        int locationPacketId = buf.readUnsignedByte();
+        String imei = buf.readSlice(buf.readUnsignedShort()).toString(StandardCharsets.US_ASCII);
+
+        return parseData(channel, remoteAddress, buf, locationPacketId, imei);
+
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/TeltonikaProtocolEncoder.java b/src/main/java/org/traccar/protocol/TeltonikaProtocolEncoder.java
new file mode 100644
index 000000000..944cec024
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/TeltonikaProtocolEncoder.java
@@ -0,0 +1,59 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseProtocolEncoder;
+import org.traccar.helper.Checksum;
+import org.traccar.model.Command;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+
+import java.nio.charset.StandardCharsets;
+
+public class TeltonikaProtocolEncoder extends BaseProtocolEncoder {
+
+    private ByteBuf encodeContent(String content) {
+
+        ByteBuf buf = Unpooled.buffer();
+
+        buf.writeInt(0);
+        buf.writeInt(content.length() + 10);
+        buf.writeByte(TeltonikaProtocolDecoder.CODEC_12);
+        buf.writeByte(1); // quantity
+        buf.writeByte(5); // type
+        buf.writeInt(content.length() + 2);
+        buf.writeBytes(content.getBytes(StandardCharsets.US_ASCII));
+        buf.writeByte('\r');
+        buf.writeByte('\n');
+        buf.writeByte(1); // quantity
+        buf.writeInt(Checksum.crc16(Checksum.CRC16_IBM, buf.nioBuffer(8, buf.writerIndex() - 8)));
+
+        return buf;
+    }
+
+    @Override
+    protected Object encodeCommand(Command command) {
+
+        switch (command.getType()) {
+            case Command.TYPE_CUSTOM:
+                return encodeContent(command.getString(Command.KEY_DATA));
+            default:
+                return null;
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/ThinkRaceProtocol.java b/src/main/java/org/traccar/protocol/ThinkRaceProtocol.java
new file mode 100644
index 000000000..ca1237cef
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/ThinkRaceProtocol.java
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LengthFieldBasedFrameDecoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class ThinkRaceProtocol extends BaseProtocol {
+
+    public ThinkRaceProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LengthFieldBasedFrameDecoder(1024, 2 + 12 + 1 + 1, 2, 2, 0));
+                pipeline.addLast(new ThinkRaceProtocolDecoder(ThinkRaceProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/ThinkRaceProtocolDecoder.java b/src/main/java/org/traccar/protocol/ThinkRaceProtocolDecoder.java
new file mode 100644
index 000000000..0928b25e0
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/ThinkRaceProtocolDecoder.java
@@ -0,0 +1,116 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.model.CellTower;
+import org.traccar.model.Network;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.Date;
+
+public class ThinkRaceProtocolDecoder extends BaseProtocolDecoder {
+
+    public ThinkRaceProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    public static final int MSG_LOGIN = 0x80;
+    public static final int MSG_GPS = 0x90;
+
+    private static double convertCoordinate(long raw, boolean negative) {
+        long degrees = raw / 1000000;
+        double minutes = (raw % 1000000) * 0.0001;
+        double result = degrees + minutes / 60;
+        if (negative) {
+            result = -result;
+        }
+        return result;
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        buf.skipBytes(2); // header
+        ByteBuf id = buf.readSlice(12);
+        buf.readUnsignedByte(); // separator
+        int type = buf.readUnsignedByte();
+        buf.readUnsignedShort(); // length
+
+        if (type == MSG_LOGIN) {
+
+            int command = buf.readUnsignedByte(); // 0x00 - heartbeat
+
+            if (command == 0x01) {
+                String imei = buf.toString(buf.readerIndex(), 15, StandardCharsets.US_ASCII);
+                DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
+                if (deviceSession != null && channel != null) {
+                    ByteBuf response = Unpooled.buffer();
+                    response.writeByte(0x48); response.writeByte(0x52); // header
+                    response.writeBytes(id);
+                    response.writeByte(0x2c); // separator
+                    response.writeByte(type);
+                    response.writeShort(0x0002); // length
+                    response.writeShort(0x8000);
+                    response.writeShort(0x0000); // checksum
+                    channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
+                }
+            }
+
+        } else if (type == MSG_GPS) {
+
+            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+            if (deviceSession == null) {
+                return null;
+            }
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            position.setTime(new Date(buf.readUnsignedInt() * 1000));
+
+            int flags = buf.readUnsignedByte();
+
+            position.setValid(true);
+            position.setLatitude(convertCoordinate(buf.readUnsignedInt(), !BitUtil.check(flags, 0)));
+            position.setLongitude(convertCoordinate(buf.readUnsignedInt(), !BitUtil.check(flags, 1)));
+
+            position.setSpeed(buf.readUnsignedByte());
+            position.setCourse(buf.readUnsignedByte());
+
+            position.setNetwork(new Network(
+                    CellTower.fromLacCid(buf.readUnsignedShort(), buf.readUnsignedShort())));
+
+            return position;
+
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Tk102Protocol.java b/src/main/java/org/traccar/protocol/Tk102Protocol.java
new file mode 100644
index 000000000..9f2463cd6
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Tk102Protocol.java
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LengthFieldBasedFrameDecoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class Tk102Protocol extends BaseProtocol {
+
+    public Tk102Protocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LengthFieldBasedFrameDecoder(1024, 1 + 1 + 10, 1, 1, 0));
+                pipeline.addLast(new Tk102ProtocolDecoder(Tk102Protocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Tk102ProtocolDecoder.java b/src/main/java/org/traccar/protocol/Tk102ProtocolDecoder.java
new file mode 100644
index 000000000..da0c6928b
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Tk102ProtocolDecoder.java
@@ -0,0 +1,144 @@
+/*
+ * Copyright 2013 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.regex.Pattern;
+
+public class Tk102ProtocolDecoder extends BaseProtocolDecoder {
+
+    public Tk102ProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    public static final int MSG_LOGIN_REQUEST = 0x80;
+    public static final int MSG_LOGIN_REQUEST_2 = 0x21;
+    public static final int MSG_LOGIN_RESPONSE = 0x00;
+    public static final int MSG_HEARTBEAT_REQUEST = 0xF0;
+    public static final int MSG_HEARTBEAT_RESPONSE = 0xFF;
+    public static final int MSG_REPORT_ONCE = 0x90;
+    public static final int MSG_REPORT_INTERVAL = 0x93;
+
+    public static final int MODE_GPRS = 0x30;
+    public static final int MODE_GPRS_SMS = 0x33;
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("(")
+            .expression("[A-Z]+")
+            .number("(dd)(dd)(dd)")              // time (hhmmss)
+            .expression("([AV])")                // validity
+            .number("(dd)(dd.dddd)([NS])")       // latitude
+            .number("(ddd)(dd.dddd)([EW])")      // longitude
+            .number("(ddd.ddd)")                 // speed
+            .number("(dd)(dd)(dd)")              // date (ddmmyy)
+            .any()
+            .text(")")
+            .compile();
+
+    private void sendResponse(Channel channel, int type, ByteBuf dataSequence, ByteBuf content) {
+        if (channel != null) {
+            ByteBuf response = Unpooled.buffer();
+            response.writeByte('[');
+            response.writeByte(type);
+            response.writeBytes(dataSequence);
+            response.writeByte(content.readableBytes());
+            response.writeBytes(content);
+            content.release();
+            response.writeByte(']');
+            channel.writeAndFlush(new NetworkMessage(response, channel.remoteAddress()));
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        buf.skipBytes(1); // header
+        int type = buf.readUnsignedByte();
+        ByteBuf dataSequence = buf.readSlice(10);
+        int length = buf.readUnsignedByte();
+
+        if (type == MSG_LOGIN_REQUEST || type == MSG_LOGIN_REQUEST_2) {
+
+            ByteBuf data = buf.readSlice(length);
+
+            String id;
+            if (type == MSG_LOGIN_REQUEST) {
+                id =  data.toString(StandardCharsets.US_ASCII);
+            } else {
+                id = data.copy(1, 15).toString(StandardCharsets.US_ASCII);
+            }
+
+            if (getDeviceSession(channel, remoteAddress, id) != null) {
+                ByteBuf response = Unpooled.buffer();
+                response.writeByte(MODE_GPRS);
+                response.writeBytes(data);
+                sendResponse(channel, MSG_LOGIN_RESPONSE, dataSequence, response);
+            }
+
+        } else if (type == MSG_HEARTBEAT_REQUEST) {
+
+            sendResponse(channel, MSG_HEARTBEAT_RESPONSE, dataSequence, buf.readRetainedSlice(length));
+
+        } else {
+
+            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+            if (deviceSession == null) {
+                return null;
+            }
+
+            Parser parser = new Parser(PATTERN, buf.readSlice(length).toString(StandardCharsets.US_ASCII));
+            if (!parser.matches()) {
+                return null;
+            }
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            DateBuilder dateBuilder = new DateBuilder()
+                    .setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+
+            position.setValid(parser.next().equals("A"));
+            position.setLatitude(parser.nextCoordinate());
+            position.setLongitude(parser.nextCoordinate());
+            position.setSpeed(parser.nextDouble(0));
+
+            dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+            position.setTime(dateBuilder.getDate());
+
+            return position;
+
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Tk103FrameDecoder.java b/src/main/java/org/traccar/protocol/Tk103FrameDecoder.java
new file mode 100644
index 000000000..b61a42563
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Tk103FrameDecoder.java
@@ -0,0 +1,75 @@
+/*
+ * Copyright 2017 Valerii Vyshniak (val@val.one)
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+import org.traccar.BaseFrameDecoder;
+
+public class Tk103FrameDecoder extends BaseFrameDecoder {
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+        if (buf.readableBytes() < 2) {
+            return null;
+        }
+
+        int frameStartIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '(');
+        if (frameStartIndex == -1) {
+            buf.clear();
+            return null;
+        }
+
+        int frameEndIndex, freeTextSymbolCounter;
+        for (frameEndIndex = frameStartIndex, freeTextSymbolCounter = 0;; frameEndIndex++) {
+            int freeTextIndex = frameEndIndex;
+            frameEndIndex = buf.indexOf(frameEndIndex, buf.writerIndex(), (byte) ')');
+            if (frameEndIndex == -1) {
+                break;
+            }
+            for (;; freeTextIndex++, freeTextSymbolCounter++) {
+                freeTextIndex = buf.indexOf(freeTextIndex, frameEndIndex, (byte) '$');
+                if (freeTextIndex == -1 || freeTextIndex >= frameEndIndex) {
+                    break;
+                }
+            }
+            if (freeTextSymbolCounter % 2 == 0) {
+                break;
+            }
+        }
+
+        if (frameEndIndex == -1) {
+            while (buf.readableBytes() > 1024) {
+                int discardUntilIndex = buf.indexOf(buf.readerIndex() + 1, buf.writerIndex(), (byte) '(');
+                if (discardUntilIndex == -1) {
+                    buf.clear();
+                } else {
+                    buf.readerIndex(discardUntilIndex);
+                }
+            }
+            return null;
+        }
+
+        buf.readerIndex(frameStartIndex);
+
+        return buf.readRetainedSlice(frameEndIndex + 1 - frameStartIndex);
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Tk103Protocol.java b/src/main/java/org/traccar/protocol/Tk103Protocol.java
new file mode 100644
index 000000000..fa83133e2
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Tk103Protocol.java
@@ -0,0 +1,69 @@
+/*
+ * Copyright 2017 Christoph Krey (c@ckrey.de)
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+import org.traccar.model.Command;
+
+public class Tk103Protocol extends BaseProtocol {
+
+    public Tk103Protocol() {
+        setSupportedDataCommands(
+                Command.TYPE_CUSTOM,
+                Command.TYPE_GET_DEVICE_STATUS,
+                Command.TYPE_IDENTIFICATION,
+                Command.TYPE_MODE_DEEP_SLEEP,
+                Command.TYPE_MODE_POWER_SAVING,
+                Command.TYPE_ALARM_SOS,
+                Command.TYPE_SET_CONNECTION,
+                Command.TYPE_SOS_NUMBER,
+                Command.TYPE_POSITION_SINGLE,
+                Command.TYPE_POSITION_PERIODIC,
+                Command.TYPE_POSITION_STOP,
+                Command.TYPE_GET_VERSION,
+                Command.TYPE_POWER_OFF,
+                Command.TYPE_REBOOT_DEVICE,
+                Command.TYPE_SET_ODOMETER,
+                Command.TYPE_ENGINE_STOP,
+                Command.TYPE_ENGINE_RESUME,
+                Command.TYPE_OUTPUT_CONTROL);
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new Tk103FrameDecoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new Tk103ProtocolEncoder());
+                pipeline.addLast(new Tk103ProtocolDecoder(Tk103Protocol.this));
+            }
+        });
+        addServer(new TrackerServer(true, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new Tk103ProtocolEncoder());
+                pipeline.addLast(new Tk103ProtocolDecoder(Tk103Protocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Tk103ProtocolDecoder.java b/src/main/java/org/traccar/protocol/Tk103ProtocolDecoder.java
new file mode 100644
index 000000000..9e28b5051
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Tk103ProtocolDecoder.java
@@ -0,0 +1,453 @@
+/*
+ * Copyright 2012 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.Context;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.CellTower;
+import org.traccar.model.Network;
+import org.traccar.model.Position;
+import org.traccar.model.WifiAccessPoint;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class Tk103ProtocolDecoder extends BaseProtocolDecoder {
+
+    private boolean decodeLow;
+
+    public Tk103ProtocolDecoder(Protocol protocol) {
+        super(protocol);
+        decodeLow = Context.getConfig().getBoolean(getProtocolName() + ".decodeLow");
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("(").optional()
+            .number("(d+)(,)?")                  // device id
+            .expression("(.{4}),?")              // command
+            .number("(d*)")
+            .number("(dd)(dd)(dd),?")            // date (mmddyy if comma-delimited, otherwise yyddmm)
+            .expression("([AV]),?")              // validity
+            .number("(d+)(dd.d+)")               // latitude
+            .expression("([NS]),?")
+            .number("(d+)(dd.d+)")               // longitude
+            .expression("([EW]),?")
+            .number("(d+.d)(?:d*,)?")            // speed
+            .number("(dd)(dd)(dd),?")            // time (hhmmss)
+            .groupBegin()
+            .number("(?:([d.]{6})|(dd)),?")      // course
+            .number("([01])")                    // charge
+            .number("([01])")                    // ignition
+            .number("(x)")                       // io
+            .number("(x)")                       // io
+            .number("(x)")                       // io
+            .number("(xxx)")                     // fuel
+            .number("L(x+)")                     // odometer
+            .or()
+            .number("(d+.d+)")                   // course
+            .groupEnd()
+            .any()
+            .number("([+-]ddd.d)?")              // temperature
+            .text(")").optional()
+            .compile();
+
+    private static final Pattern PATTERN_BATTERY = new PatternBuilder()
+            .text("(").optional()
+            .number("(d+),")                     // device id
+            .text("ZC20,")
+            .number("(dd)(dd)(dd),")             // date (ddmmyy)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .number("(d+),")                     // battery level
+            .number("(d+),")                     // battery voltage
+            .number("(d+),")                     // power voltage
+            .number("d+")                        // installed
+            .any()
+            .compile();
+
+    private static final Pattern PATTERN_NETWORK = new PatternBuilder()
+            .text("(").optional()
+            .number("(d{12})")                   // device id
+            .text("BZ00,")
+            .number("(d+),")                     // mcc
+            .number("(d+),")                     // mnc
+            .number("(x+),")                     // lac
+            .number("(x+),")                     // cid
+            .any()
+            .compile();
+
+    private static final Pattern PATTERN_LBSWIFI = new PatternBuilder()
+            .text("(").optional()
+            .number("(d+),")                     // device id
+            .expression("(.{4}),")               // command
+            .number("(d+),")                     // mcc
+            .number("(d+),")                     // mnc
+            .number("(d+),")                     // lac
+            .number("(d+),")                     // cid
+            .number("(d+),")                     // number of wifi macs
+            .number("((?:(?:xx:){5}(?:xx)\\*[-+]?d+\\*d+,)*)")
+            .number("(dd)(dd)(dd),")             // date (ddmmyy)
+            .number("(dd)(dd)(dd)")              // time (hhmmss)
+            .any()
+            .compile();
+
+    private static final Pattern PATTERN_COMMAND_RESULT = new PatternBuilder()
+            .text("(").optional()
+            .number("(d+),")                     // device id
+            .expression(".{4},")                 // command
+            .number("(dd)(dd)(dd),")             // date (ddmmyy)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .expression("\\$([\\s\\S]*?)(?:\\$|$)") // message
+            .any()
+            .compile();
+
+    private String decodeAlarm(int value) {
+        switch (value) {
+            case 1:
+                return Position.ALARM_ACCIDENT;
+            case 2:
+                return Position.ALARM_SOS;
+            case 3:
+                return Position.ALARM_VIBRATION;
+            case 4:
+                return Position.ALARM_LOW_SPEED;
+            case 5:
+                return Position.ALARM_OVERSPEED;
+            case 6:
+                return Position.ALARM_GEOFENCE_EXIT;
+            default:
+                return null;
+        }
+    }
+
+    private void decodeType(Position position, String type, String data) {
+        switch (type) {
+            case "BO01":
+                position.set(Position.KEY_ALARM, decodeAlarm(data.charAt(0) - '0'));
+                break;
+            case "ZC11":
+            case "DW31":
+            case "DW51":
+                position.set(Position.KEY_ALARM, Position.ALARM_MOVEMENT);
+                break;
+            case "ZC12":
+            case "DW32":
+            case "DW52":
+                position.set(Position.KEY_ALARM, Position.ALARM_LOW_BATTERY);
+                break;
+            case "ZC13":
+            case "DW33":
+            case "DW53":
+                position.set(Position.KEY_ALARM, Position.ALARM_POWER_CUT);
+                break;
+            case "ZC15":
+            case "DW35":
+            case "DW55":
+                position.set(Position.KEY_IGNITION, true);
+                break;
+            case "ZC16":
+            case "DW36":
+            case "DW56":
+                position.set(Position.KEY_IGNITION, false);
+                break;
+            case "ZC29":
+            case "DW42":
+            case "DW62":
+                position.set(Position.KEY_IGNITION, true);
+                break;
+            case "ZC17":
+            case "DW37":
+            case "DW57":
+                position.set(Position.KEY_ALARM, Position.ALARM_REMOVING);
+                break;
+            case "ZC25":
+            case "DW3E":
+            case "DW5E":
+                position.set(Position.KEY_ALARM, Position.ALARM_SOS);
+                break;
+            case "ZC26":
+            case "DW3F":
+            case "DW5F":
+                position.set(Position.KEY_ALARM, Position.ALARM_TAMPERING);
+                break;
+            case "ZC27":
+            case "DW40":
+            case "DW60":
+                position.set(Position.KEY_ALARM, Position.ALARM_LOW_POWER);
+                break;
+            default:
+                break;
+        }
+    }
+
+    private Integer decodeBattery(int value) {
+        switch (value) {
+            case 6:
+                return 100;
+            case 5:
+                return 80;
+            case 4:
+                return 50;
+            case 3:
+                return 20;
+            case 2:
+                return 10;
+            default:
+                return null;
+        }
+    }
+
+    private Position decodeBattery(Channel channel, SocketAddress remoteAddress, String sentence) {
+        Parser parser = new Parser(PATTERN_BATTERY, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        getLastLocation(position, parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
+
+        int batterylevel = parser.nextInt(0);
+        if (batterylevel != 255) {
+            position.set(Position.KEY_BATTERY_LEVEL, decodeBattery(batterylevel));
+        }
+
+        int battery = parser.nextInt(0);
+        if (battery != 65535) {
+            position.set(Position.KEY_BATTERY, battery * 0.01);
+        }
+
+        int power = parser.nextInt(0);
+        if (power != 65535) {
+            position.set(Position.KEY_POWER, power * 0.1);
+        }
+
+        return position;
+    }
+
+    private Position decodeNetwork(Channel channel, SocketAddress remoteAddress, String sentence) {
+        Parser parser = new Parser(PATTERN_NETWORK, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        getLastLocation(position, null);
+
+        position.setNetwork(new Network(CellTower.from(
+                parser.nextInt(0), parser.nextInt(0), parser.nextHexInt(0), parser.nextHexInt(0))));
+
+        return position;
+    }
+
+    private Position decodeLbsWifi(Channel channel, SocketAddress remoteAddress, String sentence) {
+        Parser parser = new Parser(PATTERN_LBSWIFI, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        decodeType(position, parser.next(), "0");
+
+        getLastLocation(position, null);
+
+        Network network = new Network();
+
+        network.addCellTower(CellTower.from(
+                parser.nextInt(), parser.nextInt(), parser.nextInt(), parser.nextInt()));
+
+        int wifiCount = parser.nextInt();
+        if (parser.hasNext()) {
+            String[] wifimacs = parser.next().split(",");
+            if (wifimacs.length == wifiCount) {
+                for (int i = 0; i < wifiCount; i++) {
+                    String[] wifiinfo = wifimacs[i].split("\\*");
+                    network.addWifiAccessPoint(WifiAccessPoint.from(
+                            wifiinfo[0], Integer.parseInt(wifiinfo[1]), Integer.parseInt(wifiinfo[2])));
+                }
+            }
+        }
+
+        if (network.getCellTowers() != null || network.getWifiAccessPoints() != null) {
+            position.setNetwork(network);
+        }
+
+        position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
+
+        return position;
+    }
+
+    private Position decodeCommandResult(Channel channel, SocketAddress remoteAddress, String sentence) {
+        Parser parser = new Parser(PATTERN_COMMAND_RESULT, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        getLastLocation(position, parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
+
+        position.set(Position.KEY_RESULT, parser.next());
+
+        return position;
+
+    }
+
+@Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        String sentence = (String) msg;
+
+        if (channel != null) {
+            String id = sentence.substring(1, 13);
+            String type = sentence.substring(13, 17);
+            if (type.equals("BP00")) {
+                channel.writeAndFlush(new NetworkMessage("(" + id + "AP01HSO)", remoteAddress));
+                return null;
+            } else if (type.equals("BP05")) {
+                channel.writeAndFlush(new NetworkMessage("(" + id + "AP05)", remoteAddress));
+            }
+        }
+
+        if (sentence.contains("ZC20")) {
+            return decodeBattery(channel, remoteAddress, sentence);
+        } else if (sentence.contains("BZ00")) {
+            return decodeNetwork(channel, remoteAddress, sentence);
+        } else if (sentence.contains("ZC03")) {
+            return decodeCommandResult(channel, remoteAddress, sentence);
+        } else if (sentence.contains("DW5")) {
+            return decodeLbsWifi(channel, remoteAddress, sentence);
+        }
+
+        Parser parser = new Parser(PATTERN, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        boolean alternative = parser.next() != null;
+
+        decodeType(position, parser.next(), parser.next());
+
+        DateBuilder dateBuilder = new DateBuilder();
+        if (alternative) {
+            dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+        } else {
+            dateBuilder.setDate(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+        }
+
+        position.setValid(parser.next().equals("A"));
+        position.setLatitude(parser.nextCoordinate());
+        position.setLongitude(parser.nextCoordinate());
+
+        position.setSpeed(convertSpeed(parser.nextDouble(0), "kmh"));
+
+        dateBuilder.setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+        position.setTime(dateBuilder.getDate());
+
+        if (parser.hasNext()) {
+            position.setCourse(parser.nextDouble());
+        }
+        if (parser.hasNext()) {
+            position.setCourse(parser.nextDouble());
+        }
+
+        if (parser.hasNext(7)) {
+            position.set(Position.KEY_CHARGE, parser.nextInt() == 0);
+            position.set(Position.KEY_IGNITION, parser.nextInt() == 1);
+
+            int mask1 = parser.nextHexInt();
+            position.set(Position.PREFIX_IN + 2, BitUtil.check(mask1, 0) ? 1 : 0);
+            position.set("panic", BitUtil.check(mask1, 1) ? 1 : 0);
+            position.set(Position.PREFIX_OUT + 2, BitUtil.check(mask1, 2) ? 1 : 0);
+            if (decodeLow || BitUtil.check(mask1, 3)) {
+                position.set(Position.KEY_BLOCKED, BitUtil.check(mask1, 3) ? 1 : 0);
+            }
+
+            int mask2 = parser.nextHexInt();
+            for (int i = 0; i < 3; i++) {
+                if (decodeLow || BitUtil.check(mask2, i)) {
+                    position.set("hs" + (3 - i), BitUtil.check(mask2, i) ? 1 : 0);
+                }
+            }
+            if (decodeLow || BitUtil.check(mask2, 3)) {
+                position.set(Position.KEY_DOOR, BitUtil.check(mask2, 3) ? 1 : 0);
+            }
+
+            int mask3 = parser.nextHexInt();
+            for (int i = 1; i <= 3; i++) {
+                if (decodeLow || BitUtil.check(mask3, i)) {
+                    position.set("ls" + (3 - i + 1), BitUtil.check(mask3, i) ? 1 : 0);
+                }
+            }
+
+            position.set(Position.KEY_FUEL_LEVEL, parser.nextHexInt());
+            position.set(Position.KEY_ODOMETER, parser.nextLong(16, 0));
+        }
+
+        if (parser.hasNext()) {
+            position.setCourse(parser.nextDouble());
+        }
+
+        if (parser.hasNext()) {
+            position.set(Position.PREFIX_TEMP + 1, parser.nextDouble(0));
+        }
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Tk103ProtocolEncoder.java b/src/main/java/org/traccar/protocol/Tk103ProtocolEncoder.java
new file mode 100644
index 000000000..98edc8cb5
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Tk103ProtocolEncoder.java
@@ -0,0 +1,110 @@
+/*
+ * Copyright 2017 Christoph Krey (c@ckrey.de)
+ * Copyright 2017 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.Context;
+import org.traccar.StringProtocolEncoder;
+import org.traccar.model.Command;
+
+public class Tk103ProtocolEncoder extends StringProtocolEncoder {
+
+    private final boolean forceAlternative;
+
+    public Tk103ProtocolEncoder() {
+        this.forceAlternative = false;
+    }
+
+    public Tk103ProtocolEncoder(boolean forceAlternative) {
+        this.forceAlternative = forceAlternative;
+    }
+
+    private String formatAlt(Command command, String format, String... keys) {
+        return formatCommand(command, "[begin]sms2," + format + ",[end]", keys);
+    }
+
+    @Override
+    protected Object encodeCommand(Command command) {
+
+        boolean alternative = forceAlternative || Context.getIdentityManager().lookupAttributeBoolean(
+                command.getDeviceId(), "tk103.alternative", false, true);
+
+        initDevicePassword(command, "123456");
+
+        if (alternative) {
+            switch (command.getType()) {
+                case Command.TYPE_CUSTOM:
+                    return formatAlt(command, "{%s}", Command.KEY_DATA);
+                case Command.TYPE_GET_VERSION:
+                    return formatAlt(command, "*about*");
+                case Command.TYPE_POWER_OFF:
+                    return formatAlt(command, "*turnoff*");
+                case Command.TYPE_REBOOT_DEVICE:
+                    return formatAlt(command, "88888888");
+                case Command.TYPE_POSITION_SINGLE:
+                    return formatAlt(command, "*getposl*");
+                case Command.TYPE_POSITION_PERIODIC:
+                    return formatAlt(command, "*routetrack*99*");
+                case Command.TYPE_POSITION_STOP:
+                    return formatAlt(command, "*routetrackoff*");
+                case Command.TYPE_GET_DEVICE_STATUS:
+                    return formatAlt(command, "*status*");
+                case Command.TYPE_IDENTIFICATION:
+                    return formatAlt(command, "999999");
+                case Command.TYPE_MODE_DEEP_SLEEP:
+                    return formatAlt(command, command.getBoolean(Command.KEY_ENABLE) ? "*sleep*2*" : "*sleepoff*");
+                case Command.TYPE_MODE_POWER_SAVING:
+                    return formatAlt(command, command.getBoolean(Command.KEY_ENABLE) ? "*sleepv*" : "*sleepoff*");
+                case Command.TYPE_ALARM_SOS:
+                    return formatAlt(command, command.getBoolean(Command.KEY_ENABLE) ? "*soson*" : "*sosoff*");
+                case Command.TYPE_SET_CONNECTION:
+                    return formatAlt(command, "*setip*%s*{%s}*",
+                            command.getString(Command.KEY_SERVER).replace(".", "*"), Command.KEY_PORT);
+                case Command.TYPE_SOS_NUMBER:
+                    return formatAlt(command, "*master*{%s}*{%s}*", Command.KEY_DEVICE_PASSWORD, Command.KEY_PHONE);
+                default:
+                    return null;
+            }
+        } else {
+            switch (command.getType()) {
+                case Command.TYPE_CUSTOM:
+                    return formatCommand(command, "({%s}{%s})", Command.KEY_UNIQUE_ID, Command.KEY_DATA);
+                case Command.TYPE_GET_VERSION:
+                    return formatCommand(command, "({%s}AP07)", Command.KEY_UNIQUE_ID);
+                case Command.TYPE_REBOOT_DEVICE:
+                    return formatCommand(command, "({%s}AT00)", Command.KEY_UNIQUE_ID);
+                case Command.TYPE_SET_ODOMETER:
+                    return formatCommand(command, "({%s}AX01)", Command.KEY_UNIQUE_ID);
+                case Command.TYPE_POSITION_SINGLE:
+                    return formatCommand(command, "({%s}AP00)", Command.KEY_UNIQUE_ID);
+                case Command.TYPE_POSITION_PERIODIC:
+                    return formatCommand(command, "({%s}AR00%s0000)", Command.KEY_UNIQUE_ID,
+                            String.format("%04X", command.getInteger(Command.KEY_FREQUENCY)));
+                case Command.TYPE_POSITION_STOP:
+                    return formatCommand(command, "({%s}AR0000000000)", Command.KEY_UNIQUE_ID);
+                case Command.TYPE_ENGINE_STOP:
+                    return formatCommand(command, "({%s}AV010)", Command.KEY_UNIQUE_ID);
+                case Command.TYPE_ENGINE_RESUME:
+                    return formatCommand(command, "({%s}AV011)", Command.KEY_UNIQUE_ID);
+                case Command.TYPE_OUTPUT_CONTROL:
+                    return formatCommand(command, "({%s}AV00{%s})", Command.KEY_UNIQUE_ID, Command.KEY_DATA);
+                default:
+                    return null;
+            }
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Tlt2hProtocol.java b/src/main/java/org/traccar/protocol/Tlt2hProtocol.java
new file mode 100644
index 000000000..12fd92afa
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Tlt2hProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.CharacterDelimiterFrameDecoder;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class Tlt2hProtocol extends BaseProtocol {
+
+    public Tlt2hProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CharacterDelimiterFrameDecoder(32 * 1024, "##\r\n"));
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new Tlt2hProtocolDecoder(Tlt2hProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Tlt2hProtocolDecoder.java b/src/main/java/org/traccar/protocol/Tlt2hProtocolDecoder.java
new file mode 100644
index 000000000..f67ff88db
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Tlt2hProtocolDecoder.java
@@ -0,0 +1,152 @@
+/*
+ * Copyright 2013 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.regex.Pattern;
+
+public class Tlt2hProtocolDecoder extends BaseProtocolDecoder {
+
+    public Tlt2hProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN_HEADER = new PatternBuilder()
+            .number("#(d+)#")                    // imei
+            .any()
+            .expression("([^#]+)#")              // status
+            .number("d+")                        // number of records
+            .compile();
+
+    private static final Pattern PATTERN_POSITION = new PatternBuilder()
+            .number("#(x+)?")                    // cell info
+            .text("$GPRMC,")
+            .number("(dd)(dd)(dd).d+,")          // time (hhmmss.sss)
+            .expression("([AV]),")               // validity
+            .number("(d+)(dd.d+),")              // latitude
+            .expression("([NS]),")
+            .number("(d+)(dd.d+),")              // longitude
+            .number("([EW]),")
+            .number("(d+.?d*)?,")                // speed
+            .number("(d+.?d*)?,")                // course
+            .number("(dd)(dd)(dd)")              // date (ddmmyy)
+            .any()
+            .compile();
+
+    private void decodeStatus(Position position, String status) {
+        switch (status) {
+            case "AUTOSTART":
+            case "AUTO":
+                position.set(Position.KEY_IGNITION, true);
+                break;
+            case "AUTOSTOP":
+            case "AUTOLOW":
+                position.set(Position.KEY_IGNITION, false);
+                break;
+            case "TOWED":
+                position.set(Position.KEY_ALARM, Position.ALARM_TOW);
+                break;
+            case "SOS":
+                position.set(Position.KEY_ALARM, Position.ALARM_SOS);
+                break;
+            case "DEF":
+                position.set(Position.KEY_ALARM, Position.ALARM_POWER_CUT);
+                break;
+            case "BLP":
+                position.set(Position.KEY_ALARM, Position.ALARM_LOW_BATTERY);
+                break;
+            case "CLP":
+                position.set(Position.KEY_ALARM, Position.ALARM_LOW_POWER);
+                break;
+            case "OS":
+                position.set(Position.KEY_ALARM, Position.ALARM_GEOFENCE_EXIT);
+                break;
+            case "RS":
+                position.set(Position.KEY_ALARM, Position.ALARM_GEOFENCE_ENTER);
+                break;
+            case "OVERSPEED":
+                position.set(Position.KEY_ALARM, Position.ALARM_OVERSPEED);
+                break;
+            default:
+                break;
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        String sentence = (String) msg;
+        sentence = sentence.trim();
+
+        String header = sentence.substring(0, sentence.indexOf('\r'));
+        Parser parser = new Parser(PATTERN_HEADER, header);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        String status = parser.next();
+
+        String[] messages = sentence.substring(sentence.indexOf('\n') + 1).split("\r\n");
+        List<Position> positions = new LinkedList<>();
+
+        for (String message : messages) {
+            parser = new Parser(PATTERN_POSITION, message);
+            if (parser.matches()) {
+
+                Position position = new Position(getProtocolName());
+                position.setDeviceId(deviceSession.getDeviceId());
+
+                parser.next(); // base station info
+
+                DateBuilder dateBuilder = new DateBuilder()
+                        .setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+
+                position.setValid(parser.next().equals("A"));
+                position.setLatitude(parser.nextCoordinate());
+                position.setLongitude(parser.nextCoordinate());
+                position.setSpeed(parser.nextDouble(0));
+                position.setCourse(parser.nextDouble(0));
+
+                dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+                position.setTime(dateBuilder.getDate());
+
+                decodeStatus(position, status);
+
+                positions.add(position);
+            }
+        }
+
+        return positions;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/TlvProtocol.java b/src/main/java/org/traccar/protocol/TlvProtocol.java
new file mode 100644
index 000000000..94f5da94f
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/TlvProtocol.java
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseProtocol;
+import org.traccar.CharacterDelimiterFrameDecoder;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class TlvProtocol extends BaseProtocol {
+
+    public TlvProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, '\0'));
+                pipeline.addLast(new TlvProtocolDecoder(TlvProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/TlvProtocolDecoder.java b/src/main/java/org/traccar/protocol/TlvProtocolDecoder.java
new file mode 100644
index 000000000..36cf7859f
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/TlvProtocolDecoder.java
@@ -0,0 +1,110 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.Date;
+
+public class TlvProtocolDecoder extends BaseProtocolDecoder {
+
+    public TlvProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private void sendResponse(Channel channel, SocketAddress remoteAddress, String type, String... arguments) {
+        if (channel != null) {
+            ByteBuf response = Unpooled.buffer();
+            response.writeCharSequence(type, StandardCharsets.US_ASCII);
+            for (String argument : arguments) {
+                response.writeByte(argument.length());
+                response.writeCharSequence(argument, StandardCharsets.US_ASCII);
+            }
+            response.writeByte(0);
+            channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
+        }
+    }
+
+    private String readArgument(ByteBuf buf) {
+        return buf.readSlice(buf.readUnsignedByte()).toString(StandardCharsets.US_ASCII);
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        String type = buf.readSlice(2).toString(StandardCharsets.US_ASCII);
+
+        if (channel != null) {
+            switch (type) {
+                case "0A":
+                case "0C":
+                    sendResponse(channel, remoteAddress, type);
+                    break;
+                case "0B":
+                    sendResponse(channel, remoteAddress, type, "1482202689", "10", "20", "15");
+                    break;
+                case "0E":
+                case "0F":
+                    sendResponse(channel, remoteAddress, type, "30", "Unknown");
+                    break;
+                default:
+                    break;
+            }
+        }
+
+        if (type.equals("0E")) {
+
+            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, readArgument(buf));
+            if (deviceSession == null) {
+                return null;
+            }
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            position.setValid(true);
+            position.setTime(new Date(Long.parseLong(readArgument(buf)) * 1000));
+
+            readArgument(buf); // location identifier
+
+            position.setLongitude(Double.parseDouble(readArgument(buf)));
+            position.setLatitude(Double.parseDouble(readArgument(buf)));
+            position.setSpeed(UnitsConverter.knotsFromKph(Double.parseDouble(readArgument(buf))));
+            position.setCourse(Double.parseDouble(readArgument(buf)));
+
+            position.set(Position.KEY_SATELLITES, Integer.parseInt(readArgument(buf)));
+
+            return position;
+
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/TmgFrameDecoder.java b/src/main/java/org/traccar/protocol/TmgFrameDecoder.java
new file mode 100644
index 000000000..205adaa51
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/TmgFrameDecoder.java
@@ -0,0 +1,67 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseFrameDecoder;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+
+public class TmgFrameDecoder extends BaseFrameDecoder {
+
+    private boolean isLetter(byte c) {
+        return c >= 'a' && c <= 'z';
+    }
+
+    private int findHeader(ByteBuf buffer) {
+        int guessedIndex = buffer.indexOf(buffer.readerIndex(), buffer.writerIndex(), (byte) '$');
+        while (guessedIndex != -1 && buffer.writerIndex() - guessedIndex >= 5) {
+            if (buffer.getByte(guessedIndex + 4) == ','
+                        && isLetter(buffer.getByte(guessedIndex + 1))
+                        && isLetter(buffer.getByte(guessedIndex + 2))
+                        && isLetter(buffer.getByte(guessedIndex + 3))) {
+                return guessedIndex;
+            }
+            guessedIndex = buffer.indexOf(guessedIndex, buffer.writerIndex(), (byte) '$');
+        }
+        return -1;
+    }
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+        int beginIndex = findHeader(buf);
+
+        if (beginIndex >= 0) {
+
+            buf.readerIndex(beginIndex);
+
+            int endIndex = buf.indexOf(beginIndex, buf.writerIndex(), (byte) '\n');
+
+            if (endIndex >= 0) {
+                ByteBuf frame = buf.readRetainedSlice(endIndex - beginIndex);
+                buf.readByte(); // delimiter
+                return frame;
+            }
+
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/TmgProtocol.java b/src/main/java/org/traccar/protocol/TmgProtocol.java
new file mode 100644
index 000000000..020332ce7
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/TmgProtocol.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class TmgProtocol extends BaseProtocol {
+
+    public TmgProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new TmgFrameDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new TmgProtocolDecoder(TmgProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/TmgProtocolDecoder.java b/src/main/java/org/traccar/protocol/TmgProtocolDecoder.java
new file mode 100644
index 000000000..d27849f8c
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/TmgProtocolDecoder.java
@@ -0,0 +1,194 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class TmgProtocolDecoder extends BaseProtocolDecoder {
+
+    public TmgProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("$")
+            .expression("(...),")                // type
+            .expression("[LH],").optional()      // history
+            .number("(d+),")                     // imei
+            .number("(dd)(dd)(dddd),")           // date (ddmmyyyy)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .number("(d),")                      // status
+            .number("(dd)(dd.d+),")              // latitude
+            .expression("([NS]),")
+            .number("(ddd)(dd.d+),")             // longitude
+            .expression("([EW]),")
+            .number("(d+.?d*),")                 // speed
+            .number("(d+.?d*),")                 // course
+            .groupBegin()
+            .number("(-?d+.?d*),")               // altitude
+            .number("(d+.d+),")                  // hdop
+            .number("(d+),")                     // satellites
+            .number("(d+),")                     // visible satellites
+            .number("([^,]*),")                  // operator
+            .number("(d+),")                     // rssi
+            .number("[^,]*,")                    // cid
+            .expression("([01]),")               // ignition
+            .number("(d+.?d*),")                 // battery
+            .number("(d+.?d*),")                 // power
+            .expression("([01]+),")              // input
+            .expression("([01]+),")              // output
+            .expression("[01]+,")                // temper status
+            .number("(d+.?d*)[^,]*,")            // adc1
+            .number("(d+.?d*)[^,]*,")            // adc2
+            .number("d+.?d*,")                   // trip meter
+            .expression("([^,]*),")              // software version
+            .expression("([^,]*),").optional()   // rfid
+            .or()
+            .number("[^,]*,")                    // cid
+            .number("(d+),")                     // rssi
+            .number("(d+),")                     // satellites
+            .number("[^,]*,")                    // battery level
+            .expression("([01]),")               // ignition
+            .expression("([LH]{4}),")            // input
+            .expression("[NT]{4},")              // tamper status
+            .expression("([LH]{2}),")            // output
+            .number("(d+.d+),")                  // adc1
+            .number("(d+.d+),")                  // adc1
+            .number("[^,]*,")                    // device id
+            .number("(d+),")                     // odometer
+            .groupEnd()
+            .any()
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        String type = parser.next();
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        switch (type) {
+            case "rmv":
+                position.set(Position.KEY_ALARM, Position.ALARM_POWER_CUT);
+                break;
+            case "ebl":
+                position.set(Position.KEY_ALARM, Position.ALARM_LOW_POWER);
+                break;
+            case "ibl":
+                position.set(Position.KEY_ALARM, Position.ALARM_LOW_BATTERY);
+                break;
+            case "tmp":
+            case "smt":
+            case "btt":
+                position.set(Position.KEY_ALARM, Position.ALARM_TAMPERING);
+                break;
+            case "ion":
+                position.set(Position.KEY_IGNITION, true);
+                break;
+            case "iof":
+                position.set(Position.KEY_IGNITION, false);
+                break;
+            default:
+                break;
+        }
+
+        position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
+
+        position.setValid(parser.nextInt() > 0);
+        position.setLatitude(parser.nextCoordinate());
+        position.setLongitude(parser.nextCoordinate());
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble()));
+        position.setCourse(parser.nextDouble());
+
+        if (parser.hasNext(15)) {
+
+            position.setAltitude(parser.nextDouble());
+
+            position.set(Position.KEY_HDOP, parser.nextDouble());
+            position.set(Position.KEY_SATELLITES, parser.nextInt());
+            position.set(Position.KEY_SATELLITES_VISIBLE, parser.nextInt());
+            position.set(Position.KEY_OPERATOR, parser.next());
+            position.set(Position.KEY_RSSI, parser.nextInt());
+            position.set(Position.KEY_IGNITION, parser.nextInt() == 1);
+            position.set(Position.KEY_BATTERY, parser.nextDouble());
+            position.set(Position.KEY_POWER, parser.nextDouble());
+
+            int input = parser.nextBinInt();
+            int output = parser.nextBinInt();
+
+            if (!BitUtil.check(input, 0)) {
+                position.set(Position.KEY_ALARM, Position.ALARM_SOS);
+            }
+
+            position.set(Position.KEY_INPUT, input);
+            position.set(Position.KEY_OUTPUT, output);
+
+            position.set(Position.PREFIX_ADC + 1, parser.nextDouble());
+            position.set(Position.PREFIX_ADC + 2, parser.nextDouble());
+            position.set(Position.KEY_VERSION_FW, parser.next());
+            position.set(Position.KEY_DRIVER_UNIQUE_ID, parser.next());
+
+        }
+
+        if (parser.hasNext(6)) {
+
+            position.set(Position.KEY_RSSI, parser.nextInt());
+            position.set(Position.KEY_SATELLITES, parser.nextInt());
+            position.set(Position.KEY_IGNITION, parser.nextInt() == 1);
+
+            char[] input = parser.next().toCharArray();
+            for (int i = 0; i < input.length; i++) {
+                position.set(Position.PREFIX_IN + (i + 1), input[i] == 'H');
+            }
+
+            char[] output = parser.next().toCharArray();
+            for (int i = 0; i < output.length; i++) {
+                position.set(Position.PREFIX_OUT + (i + 1), output[i] == 'H');
+            }
+
+            position.set(Position.PREFIX_ADC + 1, parser.nextDouble());
+            position.set(Position.PREFIX_ADC + 2, parser.nextDouble());
+            position.set(Position.KEY_ODOMETER, parser.nextInt());
+
+        }
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/TopflytechProtocol.java b/src/main/java/org/traccar/protocol/TopflytechProtocol.java
new file mode 100644
index 000000000..303072bdb
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/TopflytechProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.CharacterDelimiterFrameDecoder;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class TopflytechProtocol extends BaseProtocol {
+
+    public TopflytechProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, ')'));
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new TopflytechProtocolDecoder(TopflytechProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/TopflytechProtocolDecoder.java b/src/main/java/org/traccar/protocol/TopflytechProtocolDecoder.java
new file mode 100644
index 000000000..6de053c32
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/TopflytechProtocolDecoder.java
@@ -0,0 +1,76 @@
+/*
+ * Copyright 2013 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class TopflytechProtocolDecoder extends BaseProtocolDecoder {
+
+    public TopflytechProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("(")
+            .number("(d+)")                      // imei
+            .any()
+            .number("(dd)(dd)(dd)")              // date (yymmdd)
+            .number("(dd)(dd)(dd)")              // time (hhmmss)
+            .expression("([AV])")
+            .number("(dd)(dd.dddd)([NS])")       // latitude
+            .number("(ddd)(dd.dddd)([EW])")      // longitude
+            .number("(ddd.d)")                   // speed
+            .number("(d+.d+)")                   // course
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setTime(parser.nextDateTime());
+
+        position.setValid(parser.next().equals("A"));
+        position.setLatitude(parser.nextCoordinate());
+        position.setLongitude(parser.nextCoordinate());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/TotemFrameDecoder.java b/src/main/java/org/traccar/protocol/TotemFrameDecoder.java
new file mode 100644
index 000000000..3fa5abc7a
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/TotemFrameDecoder.java
@@ -0,0 +1,59 @@
+/*
+ * Copyright 2013 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+
+import java.nio.charset.StandardCharsets;
+
+import org.traccar.BaseFrameDecoder;
+import org.traccar.helper.BufferUtil;
+
+public class TotemFrameDecoder extends BaseFrameDecoder {
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+        if (buf.readableBytes() < 10) {
+            return null;
+        }
+
+        int beginIndex = BufferUtil.indexOf("$$", buf);
+        if (beginIndex == -1) {
+            return null;
+        } else if (beginIndex > buf.readerIndex()) {
+            buf.readerIndex(beginIndex);
+        }
+
+        int length;
+
+        if (buf.getByte(buf.readerIndex() + 2) == (byte) '0') {
+            length = Integer.parseInt(buf.toString(buf.readerIndex() + 2, 4, StandardCharsets.US_ASCII));
+        } else {
+            length = Integer.parseInt(buf.toString(buf.readerIndex() + 2, 2, StandardCharsets.US_ASCII), 16);
+        }
+
+        if (length <= buf.readableBytes()) {
+            return buf.readRetainedSlice(length);
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/TotemProtocol.java b/src/main/java/org/traccar/protocol/TotemProtocol.java
new file mode 100644
index 000000000..66e1ec4f1
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/TotemProtocol.java
@@ -0,0 +1,44 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+import org.traccar.model.Command;
+
+public class TotemProtocol extends BaseProtocol {
+
+    public TotemProtocol() {
+        setSupportedDataCommands(
+                Command.TYPE_ENGINE_RESUME,
+                Command.TYPE_ENGINE_STOP
+        );
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new TotemFrameDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new TotemProtocolEncoder());
+                pipeline.addLast(new TotemProtocolDecoder(TotemProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/TotemProtocolDecoder.java b/src/main/java/org/traccar/protocol/TotemProtocolDecoder.java
new file mode 100644
index 000000000..cd7f684b8
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/TotemProtocolDecoder.java
@@ -0,0 +1,444 @@
+/*
+ * Copyright 2013 - 2019 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.Checksum;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.CellTower;
+import org.traccar.model.Network;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class TotemProtocolDecoder extends BaseProtocolDecoder {
+
+    public TotemProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN1 = new PatternBuilder()
+            .text("$$")                          // header
+            .number("xx")                        // length
+            .number("(d+)|")                     // imei
+            .expression("(..)")                  // alarm
+            .text("$GPRMC,")
+            .number("(dd)(dd)(dd).d+,")          // time (hhmmss)
+            .expression("([AV]),")               // validity
+            .number("(d+)(dd.d+),([NS]),")       // latitude
+            .number("(d+)(dd.d+),([EW]),")       // longitude
+            .number("(d+.?d*)?,")                // speed
+            .number("(d+.?d*)?,")                // course
+            .number("(dd)(dd)(dd)")              // date (ddmmyy)
+            .expression("[^*]*").text("*")
+            .number("xx|")                       // checksum
+            .number("(d+.d+)|")                  // pdop
+            .number("(d+.d+)|")                  // hdop
+            .number("(d+.d+)|")                  // vdop
+            .number("(d+)|")                     // io status
+            .number("d+|")                       // battery time
+            .number("d")                         // charged
+            .number("(ddd)")                     // battery
+            .number("(dddd)|")                   // power
+            .number("(d+)|").optional()          // adc
+            .number("x*(xxxx)")                  // lac
+            .number("(xxxx)|")                   // cid
+            .number("(d+)|")                     // temperature
+            .number("(d+.d+)|")                  // odometer
+            .number("d+|")                       // serial number
+            .any()
+            .number("xxxx")                      // checksum
+            .any()
+            .compile();
+
+    private static final Pattern PATTERN2 = new PatternBuilder()
+            .text("$$")                          // header
+            .number("xx")                        // length
+            .number("(d+)|")                     // imei
+            .expression("(..)")                  // alarm type
+            .number("(dd)(dd)(dd)")              // date (ddmmyy)
+            .number("(dd)(dd)(dd)|")             // time (hhmmss)
+            .expression("([AV])|")               // validity
+            .number("(d+)(dd.d+)|")              // latitude
+            .expression("([NS])|")
+            .number("(d+)(dd.d+)|")              // longitude
+            .expression("([EW])|")
+            .number("(d+.d+)?|")                 // speed
+            .number("(d+)?|")                    // course
+            .number("(d+.d+)|")                  // hdop
+            .number("(d+)|")                     // io status
+            .number("d")                         // charged
+            .number("(dd)")                      // battery
+            .number("(dd)|")                     // external power
+            .number("(d+)|")                     // adc
+            .number("(xxxx)")                    // lac
+            .number("(xxxx)|")                   // cid
+            .number("(d+)|")                     // temperature
+            .number("(d+.d+)|")                  // odometer
+            .number("d+|")                       // serial number
+            .number("xxxx")                      // checksum
+            .any()
+            .compile();
+
+    private static final Pattern PATTERN3 = new PatternBuilder()
+            .text("$$")                          // header
+            .number("xx")                        // length
+            .number("(d+)|")                     // imei
+            .expression("(..)")                  // alarm type
+            .number("(dd)(dd)(dd)")              // date (ddmmyy)
+            .number("(dd)(dd)(dd)")              // time (hhmmss)
+            .number("(xxxx)")                    // io status
+            .expression("[01]")                  // charging
+            .number("(dd)")                      // battery
+            .number("(dd)")                      // external power
+            .number("(dddd)")                    // adc 1
+            .number("(dddd)")                    // adc 2
+            .number("(ddd)")                     // temperature 1
+            .number("(ddd)")                     // temperature 2
+            .number("(xxxx)")                    // lac
+            .number("(xxxx)")                    // cid
+            .expression("([AV])")                // validity
+            .number("(dd)")                      // satellites
+            .number("(ddd)")                     // course
+            .number("(ddd)")                     // speed
+            .number("(dd.d)")                    // pdop
+            .number("(d{7})")                    // odometer
+            .number("(dd)(dd.dddd)([NS])")       // latitude
+            .number("(ddd)(dd.dddd)([EW])")      // longitude
+            .number("dddd")                      // serial number
+            .number("xxxx")                      // checksum
+            .any()
+            .compile();
+
+    private static final Pattern PATTERN4 = new PatternBuilder()
+            .text("$$")                          // header
+            .number("dddd")                      // length
+            .number("(xx)")                      // type
+            .number("(d+)|")                     // imei
+            .number("(x{8})")                    // status
+            .number("(dd)(dd)(dd)")              // date (yymmdd)
+            .number("(dd)(dd)(dd)")              // time (hhmmss)
+            .number("(dd)")                      // battery
+            .number("(dd)")                      // external power
+            .number("(dddd)")                    // adc 1
+            .groupBegin()
+            .groupBegin()
+            .number("(dddd)")                    // adc 2
+            .number("(dddd)")                    // adc 3
+            .number("(dddd)")                    // adc 4
+            .groupEnd("?")
+            .number("(dddd)")                    // temperature 1
+            .number("(dddd)?")                   // temperature 2
+            .groupEnd("?")
+            .number("(xxxx)")                    // lac
+            .number("(xxxx)")                    // cid
+            .groupBegin()
+            .number("(dd)")                      // mcc
+            .number("(ddd)")                     // mnc
+            .groupEnd("?")
+            .number("(dd)")                      // satellites
+            .number("(dd)")                      // gsm (rssi)
+            .number("(ddd)")                     // course
+            .number("(ddd)")                     // speed
+            .number("(dd.d)")                    // hdop
+            .number("(d{7})")                    // odometer
+            .number("(dd)(dd.dddd)([NS])")       // latitude
+            .number("(ddd)(dd.dddd)([EW])")      // longitude
+            .number("dddd")                      // serial number
+            .number("xx")                        // checksum
+            .any()
+            .compile();
+
+    private String decodeAlarm123(int value) {
+        switch (value) {
+            case 0x01:
+                return Position.ALARM_SOS;
+            case 0x10:
+                return Position.ALARM_LOW_BATTERY;
+            case 0x11:
+                return Position.ALARM_OVERSPEED;
+            case 0x30:
+                return Position.ALARM_PARKING;
+            case 0x42:
+                return Position.ALARM_GEOFENCE_EXIT;
+            case 0x43:
+                return Position.ALARM_GEOFENCE_ENTER;
+            default:
+                return null;
+        }
+    }
+
+    private String decodeAlarm4(int value) {
+        switch (value) {
+            case 0x01:
+                return Position.ALARM_SOS;
+            case 0x02:
+                return Position.ALARM_OVERSPEED;
+            case 0x04:
+                return Position.ALARM_GEOFENCE_EXIT;
+            case 0x05:
+                return Position.ALARM_GEOFENCE_ENTER;
+            case 0x40:
+                return Position.ALARM_SHOCK;
+            case 0x42:
+                return Position.ALARM_ACCELERATION;
+            case 0x43:
+                return Position.ALARM_BRAKING;
+            default:
+                return null;
+        }
+    }
+
+    private boolean decode12(Position position, Parser parser, Pattern pattern) {
+
+        if (parser.hasNext()) {
+            position.set(Position.KEY_ALARM, decodeAlarm123(Short.parseShort(parser.next(), 16)));
+        }
+        DateBuilder dateBuilder = new DateBuilder();
+        int year = 0, month = 0, day = 0;
+        if (pattern == PATTERN2) {
+            day   = parser.nextInt(0);
+            month = parser.nextInt(0);
+            year  = parser.nextInt(0);
+        }
+        dateBuilder.setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+
+        position.setValid(parser.next().equals("A"));
+        position.setLatitude(parser.nextCoordinate());
+        position.setLongitude(parser.nextCoordinate());
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
+
+        if (pattern == PATTERN1) {
+            day   = parser.nextInt(0);
+            month = parser.nextInt(0);
+            year  = parser.nextInt(0);
+        }
+        if (year == 0) {
+            return false; // ignore invalid data
+        }
+        dateBuilder.setDate(year, month, day);
+        position.setTime(dateBuilder.getDate());
+
+        if (pattern == PATTERN1) {
+            position.set(Position.KEY_PDOP, parser.nextDouble());
+            position.set(Position.KEY_HDOP, parser.nextDouble());
+            position.set(Position.KEY_VDOP, parser.nextDouble());
+        } else {
+            position.set(Position.KEY_HDOP, parser.nextDouble());
+        }
+
+        int io = parser.nextBinInt();
+        position.set(Position.KEY_STATUS, io);
+        if (pattern == PATTERN1) {
+            position.set(Position.KEY_ALARM, BitUtil.check(io, 0) ? Position.ALARM_SOS : null);
+            position.set(Position.PREFIX_IN + 3, BitUtil.check(io, 4));
+            position.set(Position.PREFIX_IN + 4, BitUtil.check(io, 5));
+            position.set(Position.PREFIX_IN + 1, BitUtil.check(io, 6));
+            position.set(Position.PREFIX_IN + 2, BitUtil.check(io, 7));
+            position.set(Position.PREFIX_OUT + 1, BitUtil.check(io, 8));
+            position.set(Position.PREFIX_OUT + 2, BitUtil.check(io, 9));
+            position.set(Position.KEY_BATTERY, parser.nextDouble(0) * 0.01);
+        } else {
+            position.set(Position.KEY_ANTENNA, BitUtil.check(io, 0));
+            position.set(Position.KEY_CHARGE, BitUtil.check(io, 1));
+            for (int i = 1; i <= 6; i++) {
+                position.set(Position.PREFIX_IN + i, BitUtil.check(io, 1 + i));
+            }
+            for (int i = 1; i <= 4; i++) {
+                position.set(Position.PREFIX_OUT + i, BitUtil.check(io, 7 + i));
+            }
+            position.set(Position.KEY_BATTERY, parser.nextDouble(0) * 0.1);
+        }
+
+        position.set(Position.KEY_POWER, parser.nextDouble(0));
+        position.set(Position.PREFIX_ADC + 1, parser.next());
+
+        int lac = parser.nextHexInt(0);
+        int cid = parser.nextHexInt(0);
+        if (lac != 0 && cid != 0) {
+            position.setNetwork(new Network(CellTower.fromLacCid(lac, cid)));
+        }
+
+        position.set(Position.PREFIX_TEMP + 1, parser.next());
+        position.set(Position.KEY_ODOMETER, parser.nextDouble(0) * 1000);
+
+        return true;
+    }
+
+    private boolean decode3(Position position, Parser parser) {
+
+        if (parser.hasNext()) {
+            position.set(Position.KEY_ALARM, decodeAlarm123(Short.parseShort(parser.next(), 16)));
+        }
+
+        position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
+
+        position.set(Position.PREFIX_IO + 1, parser.next());
+        position.set(Position.KEY_BATTERY, parser.nextDouble(0) * 0.1);
+        position.set(Position.KEY_POWER, parser.nextDouble(0));
+        position.set(Position.PREFIX_ADC + 1, parser.next());
+        position.set(Position.PREFIX_ADC + 2, parser.next());
+        position.set(Position.PREFIX_TEMP + 1, parser.next());
+        position.set(Position.PREFIX_TEMP + 2, parser.next());
+
+        position.setNetwork(new Network(
+                CellTower.fromLacCid(parser.nextHexInt(0), parser.nextHexInt(0))));
+
+        position.setValid(parser.next().equals("A"));
+        position.set(Position.KEY_SATELLITES, parser.nextInt());
+        position.setCourse(parser.nextDouble(0));
+        position.setSpeed(parser.nextDouble(0));
+        position.set(Position.KEY_PDOP, parser.nextDouble());
+        position.set(Position.KEY_ODOMETER, parser.nextInt(0) * 1000);
+
+        position.setLatitude(parser.nextCoordinate());
+        position.setLongitude(parser.nextCoordinate());
+
+        return true;
+    }
+
+    private boolean decode4(Position position, Parser parser) {
+
+        long status = parser.nextHexLong();
+
+        position.set(Position.KEY_ALARM, BitUtil.check(status, 32 - 1) ? Position.ALARM_SOS : null);
+        position.set(Position.KEY_IGNITION, BitUtil.check(status, 32 - 2));
+        position.set(Position.KEY_ALARM, BitUtil.check(status, 32 - 3) ? Position.ALARM_OVERSPEED : null);
+        position.set(Position.KEY_CHARGE, BitUtil.check(status, 32 - 4));
+        position.set(Position.KEY_ALARM, BitUtil.check(status, 32 - 5) ? Position.ALARM_GEOFENCE_EXIT : null);
+        position.set(Position.KEY_ALARM, BitUtil.check(status, 32 - 6) ? Position.ALARM_GEOFENCE_ENTER : null);
+        position.set(Position.PREFIX_OUT + 1, BitUtil.check(status, 32 - 9));
+        position.set(Position.PREFIX_OUT + 2, BitUtil.check(status, 32 - 10));
+        position.set(Position.PREFIX_OUT + 3, BitUtil.check(status, 32 - 11));
+        position.set(Position.PREFIX_OUT + 4, BitUtil.check(status, 32 - 12));
+        position.set(Position.PREFIX_IN + 2, BitUtil.check(status, 32 - 13));
+        position.set(Position.PREFIX_IN + 3, BitUtil.check(status, 32 - 14));
+        position.set(Position.PREFIX_IN + 4, BitUtil.check(status, 32 - 15));
+        position.set(Position.KEY_ALARM, BitUtil.check(status, 32 - 16) ? Position.ALARM_SHOCK : null);
+        position.set(Position.KEY_ALARM, BitUtil.check(status, 32 - 18) ? Position.ALARM_LOW_BATTERY : null);
+        position.set(Position.KEY_ALARM, BitUtil.check(status, 32 - 22) ? Position.ALARM_JAMMING : null);
+
+
+        position.setTime(parser.nextDateTime());
+
+        position.set(Position.KEY_BATTERY, parser.nextDouble() * 0.1);
+        position.set(Position.KEY_POWER, parser.nextDouble());
+
+        position.set(Position.PREFIX_ADC + 1, parser.next());
+        position.set(Position.PREFIX_ADC + 2, parser.next());
+        position.set(Position.PREFIX_ADC + 3, parser.next());
+        position.set(Position.PREFIX_ADC + 4, parser.next());
+        position.set(Position.PREFIX_TEMP + 1, parser.next());
+
+        if (parser.hasNext()) {
+            position.set(Position.PREFIX_TEMP + 2, parser.next());
+            position.setValid(BitUtil.check(status, 32 - 20));
+        } else {
+            position.setValid(BitUtil.check(status, 32 - 18));
+        }
+
+        int lac = parser.nextHexInt();
+        int cid = parser.nextHexInt();
+        CellTower cellTower;
+        if (parser.hasNext(2)) {
+            int mnc = parser.nextInt();
+            int mcc = parser.nextInt();
+            cellTower = CellTower.from(mcc, mnc, lac, cid);
+        } else {
+            cellTower = CellTower.fromLacCid(lac, cid);
+        }
+        position.set(Position.KEY_SATELLITES, parser.nextInt());
+        cellTower.setSignalStrength(parser.nextInt());
+        position.setNetwork(new Network(cellTower));
+
+        position.setCourse(parser.nextDouble());
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble()));
+        position.set(Position.KEY_HDOP, parser.nextDouble());
+        position.set(Position.KEY_ODOMETER, parser.nextInt() * 1000);
+
+        position.setLatitude(parser.nextCoordinate());
+        position.setLongitude(parser.nextCoordinate());
+
+        return true;
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        String sentence = (String) msg;
+        Pattern pattern = PATTERN3;
+        if (sentence.charAt(2) == '0') {
+            pattern = PATTERN4;
+        } else if (sentence.contains("$GPRMC")) {
+            pattern = PATTERN1;
+        } else {
+            int index = sentence.indexOf('|');
+            if (index != -1 && sentence.indexOf('|', index + 1) != -1) {
+                pattern = PATTERN2;
+            }
+        }
+
+        Parser parser = new Parser(pattern, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+
+        if (pattern == PATTERN4) {
+            position.set(Position.KEY_ALARM, decodeAlarm4(parser.nextHexInt()));
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        boolean result;
+        if (pattern == PATTERN1 || pattern == PATTERN2) {
+            result = decode12(position, parser, pattern);
+        } else if (pattern == PATTERN3) {
+            result = decode3(position, parser);
+        } else {
+            result = decode4(position, parser);
+        }
+
+        if (channel != null) {
+            if (pattern == PATTERN4) {
+                String response = "$$0014AA" + sentence.substring(sentence.length() - 6, sentence.length() - 2);
+                response += String.format("%02X", Checksum.xor(response)).toUpperCase();
+                channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
+            } else {
+                channel.writeAndFlush(new NetworkMessage("ACK OK\r\n", remoteAddress));
+            }
+        }
+
+        return result ? position : null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/TotemProtocolEncoder.java b/src/main/java/org/traccar/protocol/TotemProtocolEncoder.java
new file mode 100644
index 000000000..b5049859d
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/TotemProtocolEncoder.java
@@ -0,0 +1,40 @@
+/*
+ * Copyright 2015 Irving Gonzalez
+ * Copyright 2015 - 2016 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.StringProtocolEncoder;
+import org.traccar.model.Command;
+
+public class TotemProtocolEncoder extends StringProtocolEncoder {
+
+    @Override
+    protected Object encodeCommand(Command command) {
+
+        initDevicePassword(command, "000000");
+
+        switch (command.getType()) {
+            // Assuming PIN 8 (Output C) is the power wire, like manual says but it can be PIN 5,7,8
+            case Command.TYPE_ENGINE_STOP:
+                return formatCommand(command, "*{%s},025,C,1#", Command.KEY_DEVICE_PASSWORD);
+            case Command.TYPE_ENGINE_RESUME:
+                return formatCommand(command, "*{%s},025,C,0#", Command.KEY_DEVICE_PASSWORD);
+            default:
+                return null;
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Tr20Protocol.java b/src/main/java/org/traccar/protocol/Tr20Protocol.java
new file mode 100644
index 000000000..3eee9d9c3
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Tr20Protocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LineBasedFrameDecoder;
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class Tr20Protocol extends BaseProtocol {
+
+    public Tr20Protocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LineBasedFrameDecoder(1024));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new Tr20ProtocolDecoder(Tr20Protocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Tr20ProtocolDecoder.java b/src/main/java/org/traccar/protocol/Tr20ProtocolDecoder.java
new file mode 100644
index 000000000..c2e6c381f
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Tr20ProtocolDecoder.java
@@ -0,0 +1,103 @@
+/*
+ * Copyright 2012 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class Tr20ProtocolDecoder extends BaseProtocolDecoder {
+
+    public Tr20ProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN_PING = new PatternBuilder()
+            .text("%%")
+            .expression("[^,]+,")
+            .number("(d+)")
+            .compile();
+
+    private static final Pattern PATTERN_DATA = new PatternBuilder()
+            .text("%%")
+            .expression("([^,]+),")              // id
+            .expression("([AL]),")               // validity
+            .number("(dd)(dd)(dd)")              // date (yymmdd)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .expression("([NS])")
+            .number("(dd)(dd.d+)")               // latitude
+            .expression("([EW])")
+            .number("(ddd)(dd.d+),")             // longitude
+            .number("(d+),")                     // speed
+            .number("(d+),")                     // course
+            .number("(?:NA|[FC]?(-?d+)),")       // temperature
+            .number("(x{8}),")                   // status
+            .number("(d+)")                      // event
+            .any()
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN_PING, (String) msg);
+        if (parser.matches()) {
+            if (channel != null) {
+                channel.writeAndFlush(new NetworkMessage(
+                        "&&" + parser.next() + "\r\n", remoteAddress)); // keep-alive response
+            }
+            return null;
+        }
+
+        parser = new Parser(PATTERN_DATA, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setValid(parser.next().equals("A"));
+
+        position.setTime(parser.nextDateTime());
+
+        position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN));
+        position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN));
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble()));
+        position.setCourse(parser.nextDouble());
+
+        position.set(Position.PREFIX_TEMP + 1, parser.nextInt());
+        position.set(Position.KEY_STATUS, parser.nextHexLong());
+        position.set(Position.KEY_EVENT, parser.nextInt());
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Tr900Protocol.java b/src/main/java/org/traccar/protocol/Tr900Protocol.java
new file mode 100644
index 000000000..b70521b35
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Tr900Protocol.java
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LineBasedFrameDecoder;
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class Tr900Protocol extends BaseProtocol {
+
+    public Tr900Protocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LineBasedFrameDecoder(1024));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new Tr900ProtocolDecoder(Tr900Protocol.this));
+            }
+        });
+        addServer(new TrackerServer(true, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new Tr900ProtocolDecoder(Tr900Protocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Tr900ProtocolDecoder.java b/src/main/java/org/traccar/protocol/Tr900ProtocolDecoder.java
new file mode 100644
index 000000000..319194c21
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Tr900ProtocolDecoder.java
@@ -0,0 +1,94 @@
+/*
+ * Copyright 2015 -2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class Tr900ProtocolDecoder extends BaseProtocolDecoder {
+
+    public Tr900ProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .number(">(d+),")                    // id
+            .number("d+,")                       // period
+            .number("(d),")                      // fix
+            .number("(dd)(dd)(dd),")             // date (yymmdd)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .expression("([EW])")
+            .number("(ddd)(dd.d+),")             // longitude
+            .expression("([NS])")
+            .number("(dd)(dd.d+),")              // latitude
+            .expression("[^,]*,")                // command
+            .number("(d+.?d*),")                 // speed
+            .number("(d+.?d*),")                 // course
+            .number("(d+),")                     // gsm
+            .number("(d+),")                     // event
+            .number("(d+)-")                     // adc
+            .number("(d+),")                     // battery
+            .number("d+,")                       // impulses
+            .number("(d+),")                     // input
+            .number("(d+)")                      // status
+            .any()
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setValid(parser.nextInt(0) == 1);
+
+        position.setTime(parser.nextDateTime());
+
+        position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN));
+        position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN));
+        position.setSpeed(parser.nextDouble(0));
+        position.setCourse(parser.nextDouble(0));
+
+        position.set(Position.KEY_RSSI, parser.nextDouble());
+        position.set(Position.KEY_EVENT, parser.nextInt(0));
+        position.set(Position.PREFIX_ADC + 1, parser.nextInt(0));
+        position.set(Position.KEY_BATTERY, parser.nextInt(0));
+        position.set(Position.KEY_INPUT, parser.next());
+        position.set(Position.KEY_STATUS, parser.next());
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/TrackboxProtocol.java b/src/main/java/org/traccar/protocol/TrackboxProtocol.java
new file mode 100644
index 000000000..5da5abd64
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/TrackboxProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LineBasedFrameDecoder;
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class TrackboxProtocol extends BaseProtocol {
+
+    public TrackboxProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LineBasedFrameDecoder(1024));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new TrackboxProtocolDecoder(TrackboxProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/TrackboxProtocolDecoder.java b/src/main/java/org/traccar/protocol/TrackboxProtocolDecoder.java
new file mode 100644
index 000000000..db8022738
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/TrackboxProtocolDecoder.java
@@ -0,0 +1,110 @@
+/*
+ * Copyright 2014 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class TrackboxProtocolDecoder extends BaseProtocolDecoder {
+
+    public TrackboxProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .number("(dd)(dd)(dd).(ddd),")       // time (hhmmss.sss)
+            .number("(dd)(dd.dddd)([NS]),")      // latitude
+            .number("(ddd)(dd.dddd)([EW]),")     // longitude
+            .number("(d+.d),")                   // hdop
+            .number("(-?d+.?d*),")               // altitude
+            .number("(d),")                      // fix type
+            .number("(d+.d+),")                  // course
+            .number("d+.d+,")                    // speed (kph)
+            .number("(d+.d+),")                  // speed (knots)
+            .number("(dd)(dd)(dd),")             // date (ddmmyy)
+            .number("(d+)")                      // satellites
+            .compile();
+
+    private void sendResponse(Channel channel, SocketAddress remoteAddress) {
+        if (channel != null) {
+            channel.writeAndFlush(new NetworkMessage("=OK=\r\n", remoteAddress));
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        String sentence = (String) msg;
+
+        if (sentence.startsWith("a=connect")) {
+            String id = sentence.substring(sentence.indexOf("i=") + 2);
+            if (getDeviceSession(channel, remoteAddress, id) != null) {
+                sendResponse(channel, remoteAddress);
+            }
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Parser parser = new Parser(PATTERN, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+        sendResponse(channel, remoteAddress);
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        DateBuilder dateBuilder = new DateBuilder()
+                .setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+
+        position.setLatitude(parser.nextCoordinate());
+        position.setLongitude(parser.nextCoordinate());
+
+        position.set(Position.KEY_HDOP, parser.nextDouble());
+
+        position.setAltitude(parser.nextDouble(0));
+
+        int fix = parser.nextInt(0);
+        position.set(Position.KEY_GPS, fix);
+        position.setValid(fix > 0);
+
+        position.setCourse(parser.nextDouble(0));
+        position.setSpeed(parser.nextDouble(0));
+
+        dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+        position.setTime(dateBuilder.getDate());
+
+        position.set(Position.KEY_SATELLITES, parser.nextInt());
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/TrakMateProtocol.java b/src/main/java/org/traccar/protocol/TrakMateProtocol.java
new file mode 100644
index 000000000..bda5df10f
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/TrakMateProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.CharacterDelimiterFrameDecoder;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class TrakMateProtocol extends BaseProtocol {
+
+    public TrakMateProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, '#'));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new TrakMateProtocolDecoder(TrakMateProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/TrakMateProtocolDecoder.java b/src/main/java/org/traccar/protocol/TrakMateProtocolDecoder.java
new file mode 100644
index 000000000..4d5cb18f5
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/TrakMateProtocolDecoder.java
@@ -0,0 +1,233 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class TrakMateProtocolDecoder extends BaseProtocolDecoder {
+
+    public TrakMateProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN_SRT = new PatternBuilder()
+            .text("^TMSRT|")
+            .expression("([^ ]+)|")              // uid
+            .number("(d+.d+)|")                  // latitude
+            .number("(d+.d+)|")                  // longitude
+            .number("(dd)(dd)(dd)|")             // time (hhmmss)
+            .number("(dd)(dd)(dd)|")             // date (ddmmyy)
+            .number("(d+.d+)|")                  // software ver
+            .number("(d+.d+)|")                  // Hardware ver
+            .any()
+            .compile();
+
+    private static final Pattern PATTERN_PER = new PatternBuilder()
+            .text("^TM")
+            .expression("...|")                  // type
+            .expression("([^ ]+)|")              // uid
+            .number("(d+)|")                     // seq
+            .number("(d+.d+)|")                  // latitude
+            .number("(d+.d+)|")                  // longitude
+            .number("(dd)(dd)(dd)|")             // time (hhmmss)
+            .number("(dd)(dd)(dd)|")             // date (ddmmyy)
+            .number("(d+.d+)|")                  // speed
+            .number("(d+.d+)|")                  // heading
+            .number("(d+)|").optional()          // satellites
+            .number("([01])|")                   // ignition
+            .groupBegin()
+            .number("(d+)|")                     // dop1
+            .number("(d+)|")                     // dop2
+            .number("(d+.d+)|")                  // analog
+            .number("(d+.d+)|")                  // internal battery
+            .or()
+            .number("-?d+ -?d+ -?d+|")           // accelerometer
+            .number("([01])|")                   // movement
+            .groupEnd()
+            .number("(d+.d+)|")                  // vehicle battery
+            .number("(d+.d+)|")                  // gps odometer
+            .number("(d+.d+)|").optional()       // pulse odometer
+            .number("([01])|")                   // main power status
+            .number("([01])|")                   // gps data validity
+            .number("([01])|")                   // live or cache
+            .any()
+            .compile();
+
+    private static final Pattern PATTERN_ALT = new PatternBuilder()
+            .text("^TMALT|")
+            .expression("([^ ]+)|")              // uid
+            .number("(d+)|")                     // seq
+            .number("(d+)|")                     // Alert type
+            .number("(d+)|")                     // Alert status
+            .number("(d+.d+)|")                  // latitude
+            .number("(d+.d+)|")                  // longitude
+            .number("(dd)(dd)(dd)|")             // time (hhmmss)
+            .number("(dd)(dd)(dd)|")             // date (ddmmyy)
+            .number("(d+.d+)|")                  // speed
+            .number("(d+.d+)|")                  // heading
+            .any()
+            .compile();
+
+    private String decodeAlarm(int value) {
+        switch (value) {
+            case 1:
+                return Position.ALARM_SOS;
+            case 3:
+                return Position.ALARM_GEOFENCE;
+            case 4:
+                return Position.ALARM_POWER_CUT;
+            default:
+                return null;
+        }
+    }
+
+    private Object decodeSrt(Channel channel, SocketAddress remoteAddress, String sentence) {
+
+        Parser parser = new Parser(PATTERN_SRT, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setLatitude(parser.nextDouble());
+        position.setLongitude(parser.nextDouble());
+
+        position.setTime(parser.nextDateTime(Parser.DateTimeFormat.HMS_DMY));
+
+        position.set(Position.KEY_VERSION_FW, parser.next());
+        position.set(Position.KEY_VERSION_HW, parser.next());
+
+        return position;
+    }
+
+    private Object decodeAlt(Channel channel, SocketAddress remoteAddress, String sentence) {
+
+        Parser parser = new Parser(PATTERN_ALT, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        parser.next(); // seq
+        position.set(Position.KEY_ALARM, decodeAlarm(parser.nextInt()));
+        parser.next(); // alert status or data
+
+        position.setLatitude(parser.nextDouble());
+        position.setLongitude(parser.nextDouble());
+
+        position.setTime(parser.nextDateTime(Parser.DateTimeFormat.HMS_DMY));
+
+        position.setSpeed(parser.nextDouble());
+        position.setCourse(parser.nextDouble());
+
+        return position;
+    }
+
+    private Object decodePer(Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN_PER, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        parser.next(); // seq
+
+        position.setLatitude(parser.nextDouble());
+        position.setLongitude(parser.nextDouble());
+
+        position.setTime(parser.nextDateTime(Parser.DateTimeFormat.HMS_DMY));
+
+        position.setSpeed(parser.nextDouble());
+        position.setCourse(parser.nextDouble());
+
+        position.set(Position.KEY_SATELLITES, parser.nextInt());
+        position.set(Position.KEY_IGNITION, parser.nextInt() > 0);
+
+        if (parser.hasNext(4)) {
+            position.set("dop1", parser.nextInt());
+            position.set("dop2", parser.nextInt());
+            position.set(Position.PREFIX_ADC + 1, parser.nextDouble());
+            position.set(Position.KEY_BATTERY, parser.nextDouble());
+        }
+
+        if (parser.hasNext()) {
+            position.set(Position.KEY_MOTION, parser.nextInt(0) > 0);
+        }
+
+        position.set(Position.KEY_POWER, parser.nextDouble());
+        position.set(Position.KEY_ODOMETER, parser.nextDouble());
+        position.set("pulseOdometer", parser.nextDouble());
+        position.set(Position.KEY_STATUS, parser.nextInt());
+
+        position.setValid(parser.nextInt() > 0);
+
+        position.set(Position.KEY_ARCHIVE, parser.nextInt() > 0);
+
+        return position;
+    }
+
+    @Override
+    protected Object decode(Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        String sentence = (String) msg;
+        int typeIndex = sentence.indexOf("^TM");
+        if (typeIndex < 0) {
+            return null;
+        }
+
+        String type = sentence.substring(typeIndex + 3, typeIndex + 6);
+        switch (type) {
+            case "ALT":
+                return decodeAlt(channel, remoteAddress, sentence);
+            case "SRT":
+                return decodeSrt(channel, remoteAddress, sentence);
+            default:
+                return decodePer(channel, remoteAddress, sentence);
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/TramigoFrameDecoder.java b/src/main/java/org/traccar/protocol/TramigoFrameDecoder.java
new file mode 100644
index 000000000..aaaaccb60
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/TramigoFrameDecoder.java
@@ -0,0 +1,46 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+import org.traccar.BaseFrameDecoder;
+
+public class TramigoFrameDecoder extends BaseFrameDecoder {
+
+    @Override
+    protected Object decode(ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+        if (buf.readableBytes() < 20) {
+            return null;
+        }
+
+        int length;
+        if (buf.getUnsignedByte(buf.readerIndex()) == 0x80) {
+            length = buf.getUnsignedShortLE(buf.readerIndex() + 6);
+        } else {
+            length = buf.getUnsignedShort(buf.readerIndex() + 6);
+        }
+
+        if (length >= buf.readableBytes()) {
+            return buf.readRetainedSlice(length);
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/TramigoProtocol.java b/src/main/java/org/traccar/protocol/TramigoProtocol.java
new file mode 100644
index 000000000..f683ccc5d
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/TramigoProtocol.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class TramigoProtocol extends BaseProtocol {
+
+    public TramigoProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new TramigoFrameDecoder());
+                pipeline.addLast(new TramigoProtocolDecoder(TramigoProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/TramigoProtocolDecoder.java b/src/main/java/org/traccar/protocol/TramigoProtocolDecoder.java
new file mode 100644
index 000000000..e42e2f670
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/TramigoProtocolDecoder.java
@@ -0,0 +1,160 @@
+/*
+ * Copyright 2014 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.DateUtil;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.text.DateFormat;
+import java.text.SimpleDateFormat;
+import java.util.Calendar;
+import java.util.Date;
+import java.util.Locale;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class TramigoProtocolDecoder extends BaseProtocolDecoder {
+
+    public TramigoProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    public static final int MSG_COMPACT = 0x0100;
+    public static final int MSG_FULL = 0x00FE;
+
+    private static final String[] DIRECTIONS = new String[] {"N", "NE", "E", "SE", "S", "SW", "W", "NW"};
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        int protocol = buf.readUnsignedByte();
+        boolean legacy = protocol == 0x80;
+
+        buf.readUnsignedByte(); // version id
+        int index = legacy ? buf.readUnsignedShort() : buf.readUnsignedShortLE();
+        int type = legacy ? buf.readUnsignedShort() : buf.readUnsignedShortLE();
+        buf.readUnsignedShort(); // length
+        buf.readUnsignedShort(); // mask
+        buf.readUnsignedShort(); // checksum
+        long id = legacy ? buf.readUnsignedInt() : buf.readUnsignedIntLE();
+        buf.readUnsignedInt(); // time
+
+        Position position = new Position(getProtocolName());
+        position.set(Position.KEY_INDEX, index);
+        position.setValid(true);
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, String.valueOf(id));
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        if (protocol == 0x01 && (type == MSG_COMPACT || type == MSG_FULL)) {
+
+            // need to send ack?
+
+            buf.readUnsignedShortLE(); // report trigger
+            buf.readUnsignedShortLE(); // state flag
+
+            position.setLatitude(buf.readUnsignedIntLE() * 0.0000001);
+            position.setLongitude(buf.readUnsignedIntLE() * 0.0000001);
+
+            position.set(Position.KEY_RSSI, buf.readUnsignedShortLE());
+            position.set(Position.KEY_SATELLITES, buf.readUnsignedShortLE());
+            position.set(Position.KEY_SATELLITES_VISIBLE, buf.readUnsignedShortLE());
+            position.set("gpsAntennaStatus", buf.readUnsignedShortLE());
+
+            position.setSpeed(buf.readUnsignedShortLE() * 0.194384);
+            position.setCourse(buf.readUnsignedShortLE());
+
+            position.set(Position.KEY_ODOMETER, buf.readUnsignedIntLE());
+
+            position.set(Position.KEY_BATTERY, buf.readUnsignedShortLE());
+
+            position.set(Position.KEY_CHARGE, buf.readUnsignedShortLE());
+
+            position.setTime(new Date(buf.readUnsignedIntLE() * 1000));
+
+            // parse other data
+
+            return position;
+
+        } else if (legacy) {
+
+            if (channel != null) {
+                channel.writeAndFlush(new NetworkMessage(
+                        Unpooled.copiedBuffer("gprs,ack," + index, StandardCharsets.US_ASCII), remoteAddress));
+            }
+
+            String sentence = buf.toString(StandardCharsets.US_ASCII);
+
+            Pattern pattern = Pattern.compile("(-?\\d+\\.\\d+), (-?\\d+\\.\\d+)");
+            Matcher matcher = pattern.matcher(sentence);
+            if (!matcher.find()) {
+                return null;
+            }
+            position.setLatitude(Double.parseDouble(matcher.group(1)));
+            position.setLongitude(Double.parseDouble(matcher.group(2)));
+
+            pattern = Pattern.compile("([NSWE]{1,2}) with speed (\\d+) km/h");
+            matcher = pattern.matcher(sentence);
+            if (matcher.find()) {
+                for (int i = 0; i < DIRECTIONS.length; i++) {
+                    if (matcher.group(1).equals(DIRECTIONS[i])) {
+                        position.setCourse(i * 45.0);
+                        break;
+                    }
+                }
+                position.setSpeed(UnitsConverter.knotsFromKph(Double.parseDouble(matcher.group(2))));
+            }
+
+            pattern = Pattern.compile("(\\d{1,2}:\\d{2}(:\\d{2})? \\w{3} \\d{1,2})");
+            matcher = pattern.matcher(sentence);
+            if (!matcher.find()) {
+                return null;
+            }
+            DateFormat dateFormat = new SimpleDateFormat(
+                    matcher.group(2) != null ? "HH:mm:ss MMM d yyyy" : "HH:mm MMM d yyyy", Locale.ENGLISH);
+            position.setTime(DateUtil.correctYear(
+                    dateFormat.parse(matcher.group(1) + " " + Calendar.getInstance().get(Calendar.YEAR))));
+
+            if (sentence.contains("Ignition on detected")) {
+                position.set(Position.KEY_IGNITION, true);
+            } else if (sentence.contains("Ignition off detected")) {
+                position.set(Position.KEY_IGNITION, false);
+            }
+
+            return position;
+
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/TrvProtocol.java b/src/main/java/org/traccar/protocol/TrvProtocol.java
new file mode 100644
index 000000000..99a164cf1
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/TrvProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.CharacterDelimiterFrameDecoder;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class TrvProtocol extends BaseProtocol {
+
+    public TrvProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, '#'));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new TrvProtocolDecoder(TrvProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/TrvProtocolDecoder.java b/src/main/java/org/traccar/protocol/TrvProtocolDecoder.java
new file mode 100644
index 000000000..b63385187
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/TrvProtocolDecoder.java
@@ -0,0 +1,258 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.CellTower;
+import org.traccar.model.Network;
+import org.traccar.model.Position;
+import org.traccar.model.WifiAccessPoint;
+
+import java.net.SocketAddress;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.regex.Pattern;
+
+public class TrvProtocolDecoder extends BaseProtocolDecoder {
+
+    public TrvProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .expression("[A-Z]{2,3}")
+            .number("APdd")
+            .number("(dd)(dd)(dd)")              // date (yymmdd)
+            .expression("([AV])")                // validity
+            .number("(dd)(dd.d+)")               // latitude
+            .expression("([NS])")
+            .number("(ddd)(dd.d+)")              // longitude
+            .expression("([EW])")
+            .number("(ddd.d)")                   // speed
+            .number("(dd)(dd)(dd)")              // time (hhmmss)
+            .number("([d.]{6})")                 // course
+            .number("(ddd)")                     // gsm
+            .number("(ddd)")                     // satellites
+            .number("(ddd)")                     // battery
+            .number("(d)")                       // acc
+            .number("(dd)")                      // arm status
+            .number("(dd),")                     // working mode
+            .number("(d+),")                     // mcc
+            .number("(d+),")                     // mnc
+            .number("(d+),")                     // lac
+            .number("(d+)")                      // cell
+            .any()
+            .compile();
+
+    private static final Pattern PATTERN_HEATRBEAT = new PatternBuilder()
+            .expression("[A-Z]{2,3}")
+            .text("CP01,")
+            .number("(ddd)")                     // gsm
+            .number("(ddd)")                     // gps
+            .number("(ddd)")                     // battery
+            .number("(d)")                       // acc
+            .number("(dd)")                      // arm status
+            .number("(dd)")                      // working mode
+            .groupBegin()
+            .number("(ddd)")                     // interval
+            .number("d")                         // vibration alarm
+            .number("ddd")                       // vibration sensitivity
+            .number("d")                         // automatic arm
+            .number("dddd")                      // automatic arm time
+            .number("(d)")                       // blocked
+            .number("(d)")                       // power status
+            .number("(d)")                       // movement status
+            .groupEnd("?")
+            .any()
+            .compile();
+
+    private static final Pattern PATTERN_LBS = new PatternBuilder()
+            .expression("[A-Z]{2,3}")
+            .text("AP02,")
+            .expression("[^,]+,")                // language
+            .number("[01],")                     // reply
+            .number("d+,")                       // cell count
+            .number("(d+),")                     // mcc
+            .number("(d+),")                     // mnc
+            .expression("(")
+            .groupBegin()
+            .number("d+|")                       // lac
+            .number("d+|")                       // cid
+            .number("d+,")                       // rssi
+            .groupEnd("+")
+            .expression(")")
+            .number("d+,")                       // wifi count
+            .expression("(.*)")                  // wifi
+            .compile();
+
+    private Boolean decodeOptionalValue(Parser parser, int activeValue) {
+        int value = parser.nextInt();
+        if (value != 0) {
+            return value == activeValue;
+        }
+        return null;
+    }
+
+    private void decodeCommon(Position position, Parser parser) {
+
+        position.set(Position.KEY_RSSI, parser.nextInt());
+        position.set(Position.KEY_SATELLITES, parser.nextInt());
+        position.set(Position.KEY_BATTERY, parser.nextInt());
+        position.set(Position.KEY_IGNITION, decodeOptionalValue(parser, 1));
+        position.set(Position.KEY_ARMED, decodeOptionalValue(parser, 1));
+
+        int mode = parser.nextInt();
+        if (mode != 0) {
+            position.set("mode", mode);
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        String sentence = (String) msg;
+
+        String id = sentence.startsWith("TRV") ? sentence.substring(0, 3) : sentence.substring(0, 2);
+        String type = sentence.substring(id.length(), id.length() + 4);
+
+        if (channel != null) {
+            String responseHeader = id + (char) (type.charAt(0) + 1) + type.substring(1);
+            if (type.equals("AP00") && id.equals("IW")) {
+                String time = new SimpleDateFormat("yyyyMMddHHmmss").format(new Date());
+                channel.writeAndFlush(new NetworkMessage(responseHeader + "," + time + ",0#", remoteAddress));
+            } else if (type.equals("AP14")) {
+                channel.writeAndFlush(new NetworkMessage(responseHeader + ",0.000,0.000#", remoteAddress));
+            } else {
+                channel.writeAndFlush(new NetworkMessage(responseHeader + "#", remoteAddress));
+            }
+        }
+
+        if (type.equals("AP00")) {
+            getDeviceSession(channel, remoteAddress, sentence.substring(id.length() + type.length()));
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        if (type.equals("CP01")) {
+
+            Parser parser = new Parser(PATTERN_HEATRBEAT, sentence);
+            if (!parser.matches()) {
+                return null;
+            }
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            getLastLocation(position, null);
+
+            decodeCommon(position, parser);
+
+            if (parser.hasNext(3)) {
+                position.set(Position.KEY_BLOCKED, decodeOptionalValue(parser, 2));
+                position.set(Position.KEY_CHARGE, decodeOptionalValue(parser, 1));
+                position.set(Position.KEY_MOTION, decodeOptionalValue(parser, 1));
+            }
+
+            return position;
+
+        } else if (type.equals("AP01") || type.equals("AP10")) {
+
+            Parser parser = new Parser(PATTERN, sentence);
+            if (!parser.matches()) {
+                return null;
+            }
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            DateBuilder dateBuilder = new DateBuilder()
+                    .setDate(parser.nextInt(), parser.nextInt(), parser.nextInt());
+
+            position.setValid(parser.next().equals("A"));
+            position.setLatitude(parser.nextCoordinate());
+            position.setLongitude(parser.nextCoordinate());
+            position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble()));
+
+            dateBuilder.setTime(parser.nextInt(), parser.nextInt(), parser.nextInt());
+            position.setTime(dateBuilder.getDate());
+
+            position.setCourse(parser.nextDouble());
+
+            decodeCommon(position, parser);
+
+            position.setNetwork(new Network(CellTower.from(
+                    parser.nextInt(), parser.nextInt(), parser.nextInt(), parser.nextInt())));
+
+            return position;
+
+        } else if (type.equals("AP02")) {
+
+            Parser parser = new Parser(PATTERN_LBS, sentence);
+            if (!parser.matches()) {
+                return null;
+            }
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            getLastLocation(position, null);
+
+            int mcc = parser.nextInt();
+            int mnc = parser.nextInt();
+
+            Network network = new Network();
+
+            for (String cell : parser.next().split(",")) {
+                if (!cell.isEmpty()) {
+                    String[] values = cell.split("\\|");
+                    network.addCellTower(CellTower.from(
+                            mcc, mnc,
+                            Integer.parseInt(values[0]),
+                            Integer.parseInt(values[1]),
+                            Integer.parseInt(values[2])));
+                }
+            }
+
+            for (String wifi : parser.next().split("&")) {
+                if (!wifi.isEmpty()) {
+                    String[] values = wifi.split("\\|");
+                    network.addWifiAccessPoint(WifiAccessPoint.from(values[1], Integer.parseInt(values[2])));
+                }
+            }
+
+            position.setNetwork(network);
+
+            return position;
+
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Tt8850Protocol.java b/src/main/java/org/traccar/protocol/Tt8850Protocol.java
new file mode 100644
index 000000000..66a13da9e
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Tt8850Protocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.CharacterDelimiterFrameDecoder;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class Tt8850Protocol extends BaseProtocol {
+
+    public Tt8850Protocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, "$"));
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new Tt8850ProtocolDecoder(Tt8850Protocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Tt8850ProtocolDecoder.java b/src/main/java/org/traccar/protocol/Tt8850ProtocolDecoder.java
new file mode 100644
index 000000000..1010528c4
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Tt8850ProtocolDecoder.java
@@ -0,0 +1,99 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.CellTower;
+import org.traccar.model.Network;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class Tt8850ProtocolDecoder extends BaseProtocolDecoder {
+
+    public Tt8850ProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .binary("0004,")
+            .number("xxxx,")
+            .expression("[01],")
+            .expression("GT...,")
+            .number("(?:[0-9A-Z]{2}xxxx)?,")     // protocol version
+            .expression("([^,]+),")              // imei
+            .any()
+            .number("(d{1,2})?,")                // gps accuracy
+            .number("(d{1,3}.d)?,")              // speed
+            .number("(d{1,3})?,")                // course
+            .number("(-?d{1,5}.d)?,")            // altitude
+            .number("(-?d{1,3}.d{6}),")          // longitude
+            .number("(-?d{1,2}.d{6}),")          // latitude
+            .number("(dddd)(dd)(dd)")            // date (yyyymmdd)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .number("(0ddd)?,")                  // mcc
+            .number("(0ddd)?,")                  // mnc
+            .number("(xxxx)?,")                  // lac
+            .number("(xxxx)?,")                  // cell
+            .any()
+            .number("(dddd)(dd)(dd)")            // date (yyyymmdd)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .number("(xxxx)")
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setValid(true);
+        position.setAccuracy(parser.nextInt(0));
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
+        position.setCourse(parser.nextDouble(0));
+        position.setAltitude(parser.nextDouble(0));
+        position.setLongitude(parser.nextDouble(0));
+        position.setLatitude(parser.nextDouble(0));
+
+        position.setTime(parser.nextDateTime());
+
+        if (parser.hasNext(4)) {
+            position.setNetwork(new Network(
+                    CellTower.from(parser.nextInt(0), parser.nextInt(0), parser.nextHexInt(0), parser.nextHexInt(0))));
+        }
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/TytanProtocol.java b/src/main/java/org/traccar/protocol/TytanProtocol.java
new file mode 100644
index 000000000..32e9acae1
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/TytanProtocol.java
@@ -0,0 +1,33 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class TytanProtocol extends BaseProtocol {
+
+    public TytanProtocol() {
+        addServer(new TrackerServer(true, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new TytanProtocolDecoder(TytanProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/TytanProtocolDecoder.java b/src/main/java/org/traccar/protocol/TytanProtocolDecoder.java
new file mode 100644
index 000000000..93d3a63d2
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/TytanProtocolDecoder.java
@@ -0,0 +1,192 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.ByteBufUtil;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.Date;
+import java.util.LinkedList;
+import java.util.List;
+
+public class TytanProtocolDecoder extends BaseProtocolDecoder {
+
+    public TytanProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private void decodeExtraData(Position position, ByteBuf buf, int end) {
+        while (buf.readerIndex() < end) {
+
+            int type = buf.readUnsignedByte();
+            int length = buf.readUnsignedByte();
+            if (length == 255) {
+                length += buf.readUnsignedByte();
+            }
+
+            int n;
+
+            switch (type) {
+                case 2:
+                    position.set(Position.KEY_ODOMETER_TRIP, buf.readUnsignedMedium());
+                    break;
+                case 5:
+                    position.set(Position.KEY_INPUT, buf.readUnsignedByte());
+                    break;
+                case 6:
+                    n = buf.readUnsignedByte() >> 4;
+                    if (n < 2) {
+                        position.set(Position.PREFIX_ADC + n, buf.readFloat());
+                    } else {
+                        position.set("di" + (n - 2), buf.readFloat());
+                    }
+                    break;
+                case 7:
+                    int alarm = buf.readUnsignedByte();
+                    buf.readUnsignedByte();
+                    if (BitUtil.check(alarm, 5)) {
+                        position.set(Position.KEY_ALARM, Position.ALARM_GENERAL);
+                    }
+                    break;
+                case 8:
+                    position.set("antihijack", buf.readUnsignedByte());
+                    break;
+                case 9:
+                    position.set("unauthorized", ByteBufUtil.hexDump(buf.readSlice(8)));
+                    break;
+                case 10:
+                    position.set("authorized", ByteBufUtil.hexDump(buf.readSlice(8)));
+                    break;
+                case 24:
+                    for (int i = 0; i < length / 2; i++) {
+                        position.set(Position.PREFIX_TEMP + buf.readUnsignedByte(), buf.readByte());
+                    }
+                    break;
+                case 28:
+                    position.set(Position.KEY_AXLE_WEIGHT, buf.readUnsignedShort());
+                    buf.readUnsignedByte();
+                    break;
+                case 90:
+                    position.set(Position.KEY_POWER, buf.readFloat());
+                    break;
+                case 101:
+                    position.set(Position.KEY_OBD_SPEED, buf.readUnsignedByte());
+                    break;
+                case 102:
+                    position.set(Position.KEY_RPM, buf.readUnsignedByte() * 50);
+                    break;
+                case 107:
+                    int fuel = buf.readUnsignedShort();
+                    int fuelFormat = fuel >> 14;
+                    if (fuelFormat == 1) {
+                        position.set("fuelValue", (fuel & 0x3fff) * 0.4 + "%");
+                    } else if (fuelFormat == 2) {
+                        position.set("fuelValue", (fuel & 0x3fff) * 0.5 + " l");
+                    } else if (fuelFormat == 3) {
+                        position.set("fuelValue", (fuel & 0x3fff) * -0.5 + " l");
+                    }
+                    break;
+                case 108:
+                    position.set(Position.KEY_OBD_ODOMETER, buf.readUnsignedInt() * 5);
+                    break;
+                case 150:
+                    position.set(Position.KEY_DOOR, buf.readUnsignedByte());
+                    break;
+                default:
+                    buf.skipBytes(length);
+                    break;
+            }
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        buf.readUnsignedByte(); // protocol
+        buf.readUnsignedShort(); // length
+        int index = buf.readUnsignedByte() >> 3;
+
+        if (channel != null) {
+            ByteBuf response = Unpooled.copiedBuffer("^" + index, StandardCharsets.US_ASCII);
+            channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
+        }
+
+        String id = String.valueOf(buf.readUnsignedInt());
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, id);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        List<Position> positions = new LinkedList<>();
+
+        while (buf.readableBytes() > 2) {
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            int end = buf.readerIndex() + buf.readUnsignedByte();
+
+            position.setTime(new Date(buf.readUnsignedInt() * 1000));
+
+            int flags = buf.readUnsignedByte();
+            position.set(Position.KEY_SATELLITES, BitUtil.from(flags, 2));
+            position.setValid(BitUtil.to(flags, 2) > 0);
+
+            // Latitude
+            double lat = buf.readUnsignedMedium();
+            lat = lat * -180 / 16777216 + 90;
+            position.setLatitude(lat);
+
+            // Longitude
+            double lon = buf.readUnsignedMedium();
+            lon = lon * 360 / 16777216 - 180;
+            position.setLongitude(lon);
+
+            // Status
+            flags = buf.readUnsignedByte();
+            position.set(Position.KEY_IGNITION, BitUtil.check(flags, 0));
+            position.set(Position.KEY_RSSI, BitUtil.between(flags, 2, 5));
+            position.setCourse((BitUtil.from(flags, 5) * 45 + 180) % 360);
+
+            // Speed
+            int speed = buf.readUnsignedByte();
+            if (speed < 250) {
+                position.setSpeed(UnitsConverter.knotsFromKph(speed));
+            }
+
+            decodeExtraData(position, buf, end);
+
+            positions.add(position);
+        }
+
+        return positions;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/TzoneProtocol.java b/src/main/java/org/traccar/protocol/TzoneProtocol.java
new file mode 100644
index 000000000..6e855d138
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/TzoneProtocol.java
@@ -0,0 +1,36 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+import io.netty.handler.codec.LengthFieldBasedFrameDecoder;
+
+public class TzoneProtocol extends BaseProtocol {
+
+    public TzoneProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LengthFieldBasedFrameDecoder(256, 2, 2, 2, 0));
+                pipeline.addLast(new TzoneProtocolDecoder(TzoneProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/TzoneProtocolDecoder.java b/src/main/java/org/traccar/protocol/TzoneProtocolDecoder.java
new file mode 100644
index 000000000..87b44a4b2
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/TzoneProtocolDecoder.java
@@ -0,0 +1,293 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.ByteBufUtil;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.DateBuilder;
+import org.traccar.model.CellTower;
+import org.traccar.model.Network;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+
+public class TzoneProtocolDecoder extends BaseProtocolDecoder {
+
+    public TzoneProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private String decodeAlarm(Short value) {
+        switch (value) {
+            case 0x01:
+                return Position.ALARM_SOS;
+            case 0x10:
+                return Position.ALARM_LOW_BATTERY;
+            case 0x11:
+                return Position.ALARM_OVERSPEED;
+            case 0x14:
+                return Position.ALARM_BRAKING;
+            case 0x15:
+                return Position.ALARM_ACCELERATION;
+            case 0x30:
+                return Position.ALARM_PARKING;
+            case 0x42:
+                return Position.ALARM_GEOFENCE_EXIT;
+            case 0x43:
+                return Position.ALARM_GEOFENCE_ENTER;
+            default:
+                return null;
+        }
+    }
+
+    private boolean decodeGps(Position position, ByteBuf buf, int hardware) {
+
+        int blockLength = buf.readUnsignedShort();
+        int blockEnd = buf.readerIndex() + blockLength;
+
+        if (blockLength < 22) {
+            return false;
+        }
+
+        position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
+
+        double lat;
+        double lon;
+
+        if (hardware == 0x10A || hardware == 0x10B) {
+            lat = buf.readUnsignedInt() / 600000.0;
+            lon = buf.readUnsignedInt() / 600000.0;
+        } else {
+            lat = buf.readUnsignedInt() / 100000.0 / 60.0;
+            lon = buf.readUnsignedInt() / 100000.0 / 60.0;
+        }
+
+        position.setFixTime(new DateBuilder()
+                .setDate(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte())
+                .setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte()).getDate());
+
+        position.setSpeed(buf.readUnsignedShort() * 0.01);
+
+        position.set(Position.KEY_ODOMETER, buf.readUnsignedMedium());
+
+        int flags = buf.readUnsignedShort();
+        position.setCourse(BitUtil.to(flags, 9));
+        if (!BitUtil.check(flags, 10)) {
+            lat = -lat;
+        }
+        position.setLatitude(lat);
+        if (BitUtil.check(flags, 9)) {
+            lon = -lon;
+        }
+        position.setLongitude(lon);
+        position.setValid(BitUtil.check(flags, 11));
+
+        buf.readerIndex(blockEnd);
+
+        return true;
+    }
+
+    private void decodeCards(Position position, ByteBuf buf) {
+
+        int index = 1;
+        for (int i = 0; i < 4; i++) {
+
+            int blockLength = buf.readUnsignedShort();
+            int blockEnd = buf.readerIndex() + blockLength;
+
+            if (blockLength > 0) {
+
+                int count = buf.readUnsignedByte();
+                for (int j = 0; j < count; j++) {
+
+                    int length = buf.readUnsignedByte();
+
+                    boolean odd = length % 2 != 0;
+                    if (odd) {
+                        length += 1;
+                    }
+
+                    String num = ByteBufUtil.hexDump(buf.readSlice(length / 2));
+
+                    if (odd) {
+                        num = num.substring(1);
+                    }
+
+                    position.set("card" + index, num);
+                }
+            }
+
+            buf.readerIndex(blockEnd);
+        }
+
+    }
+
+    private void decodePassengers(Position position, ByteBuf buf) {
+
+        int blockLength = buf.readUnsignedShort();
+        int blockEnd = buf.readerIndex() + blockLength;
+
+        if (blockLength > 0) {
+
+            position.set("passengersOn", buf.readUnsignedMedium());
+            position.set("passengersOff", buf.readUnsignedMedium());
+
+        }
+
+        buf.readerIndex(blockEnd);
+
+    }
+
+    private void decodeTags(Position position, ByteBuf buf) {
+
+        int blockLength = buf.readUnsignedShort();
+        int blockEnd = buf.readerIndex() + blockLength;
+
+        if (blockLength > 0) {
+
+            buf.readUnsignedByte(); // tag type
+
+            int count = buf.readUnsignedByte();
+            int tagLength = buf.readUnsignedByte();
+
+            for (int i = 1; i <= count; i++) {
+                int tagEnd = buf.readerIndex() + tagLength;
+
+                buf.readUnsignedByte(); // status
+                buf.readUnsignedShortLE(); // battery voltage
+
+                position.set(Position.PREFIX_TEMP + i, (buf.readShortLE() & 0x3fff) * 0.1);
+
+                buf.readUnsignedByte(); // humidity
+                buf.readUnsignedByte(); // rssi
+
+                buf.readerIndex(tagEnd);
+            }
+
+        }
+
+        buf.readerIndex(blockEnd);
+
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        buf.skipBytes(2); // header
+        buf.readUnsignedShort(); // length
+        if (buf.readUnsignedShort() != 0x2424) {
+            return null;
+        }
+        int hardware = buf.readUnsignedShort();
+        long firmware = buf.readUnsignedInt();
+
+        String imei = ByteBufUtil.hexDump(buf.readSlice(8)).substring(1);
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.set(Position.KEY_VERSION_HW, hardware);
+        position.set(Position.KEY_VERSION_FW, firmware);
+
+        position.setDeviceTime(new DateBuilder()
+                .setDate(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte())
+                .setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte()).getDate());
+
+        // GPS info
+
+        if (hardware == 0x406 || !decodeGps(position, buf, hardware)) {
+
+            getLastLocation(position, position.getDeviceTime());
+
+        }
+
+        // LBS info
+
+        int blockLength = buf.readUnsignedShort();
+        int blockEnd = buf.readerIndex() + blockLength;
+
+        if (blockLength > 0 && (hardware == 0x10A || hardware == 0x10B || hardware == 0x406)) {
+            position.setNetwork(new Network(
+                    CellTower.fromLacCid(buf.readUnsignedShort(), buf.readUnsignedShort())));
+        }
+
+        buf.readerIndex(blockEnd);
+
+        // Status info
+
+        blockLength = buf.readUnsignedShort();
+        blockEnd = buf.readerIndex() + blockLength;
+
+        if (blockLength >= 13) {
+            position.set(Position.KEY_ALARM, decodeAlarm(buf.readUnsignedByte()));
+            position.set("terminalInfo", buf.readUnsignedByte());
+
+            int status = buf.readUnsignedByte();
+            position.set(Position.PREFIX_OUT + 1, BitUtil.check(status, 0));
+            position.set(Position.PREFIX_OUT + 2, BitUtil.check(status, 1));
+            status = buf.readUnsignedByte();
+            position.set(Position.PREFIX_IN + 1, BitUtil.check(status, 4));
+            if (BitUtil.check(status, 0)) {
+                position.set(Position.KEY_ALARM, Position.ALARM_SOS);
+            }
+
+            position.set(Position.KEY_RSSI, buf.readUnsignedByte());
+            position.set("gsmStatus", buf.readUnsignedByte());
+            position.set(Position.KEY_BATTERY, buf.readUnsignedShort());
+            position.set(Position.KEY_POWER, buf.readUnsignedShort());
+            position.set(Position.PREFIX_ADC + 1, buf.readUnsignedShort());
+            position.set(Position.PREFIX_ADC + 2, buf.readUnsignedShort());
+        }
+
+        if (blockLength >= 15) {
+            position.set(Position.PREFIX_TEMP + 1, buf.readUnsignedShort());
+        }
+
+        buf.readerIndex(blockEnd);
+
+        if (hardware == 0x10B) {
+
+            decodeCards(position, buf);
+
+            buf.skipBytes(buf.readUnsignedShort()); // temperature
+            buf.skipBytes(buf.readUnsignedShort()); // lock
+
+            decodePassengers(position, buf);
+
+        }
+
+        if (hardware == 0x406) {
+
+            decodeTags(position, buf);
+
+        }
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/UlbotechFrameDecoder.java b/src/main/java/org/traccar/protocol/UlbotechFrameDecoder.java
new file mode 100644
index 000000000..f141dc9b7
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/UlbotechFrameDecoder.java
@@ -0,0 +1,70 @@
+/*
+ * Copyright 2014 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseFrameDecoder;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+
+public class UlbotechFrameDecoder extends BaseFrameDecoder {
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+        if (buf.readableBytes() < 2) {
+            return null;
+        }
+
+        if (buf.getUnsignedByte(buf.readerIndex()) == 0xF8) {
+
+            int index = buf.indexOf(buf.readerIndex() + 1, buf.writerIndex(), (byte) 0xF8);
+            if (index != -1) {
+                ByteBuf result = Unpooled.buffer(index + 1 - buf.readerIndex());
+
+                while (buf.readerIndex() <= index) {
+                    int b = buf.readUnsignedByte();
+                    if (b == 0xF7) {
+                        int ext = buf.readUnsignedByte();
+                        if (ext == 0x00) {
+                            result.writeByte(0xF7);
+                        } else if (ext == 0x0F) {
+                            result.writeByte(0xF8);
+                        }
+                    } else {
+                        result.writeByte(b);
+                    }
+                }
+
+                return result;
+            }
+
+        } else {
+
+            int index = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '#');
+            if (index != -1) {
+                return buf.readRetainedSlice(index + 1 - buf.readerIndex());
+            }
+
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/UlbotechProtocol.java b/src/main/java/org/traccar/protocol/UlbotechProtocol.java
new file mode 100644
index 000000000..b99ec1cc6
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/UlbotechProtocol.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class UlbotechProtocol extends BaseProtocol {
+
+    public UlbotechProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new UlbotechFrameDecoder());
+                pipeline.addLast(new UlbotechProtocolDecoder(UlbotechProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/UlbotechProtocolDecoder.java b/src/main/java/org/traccar/protocol/UlbotechProtocolDecoder.java
new file mode 100644
index 000000000..0a2a59e23
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/UlbotechProtocolDecoder.java
@@ -0,0 +1,371 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.ByteBufUtil;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.Checksum;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.ObdDecoder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.CellTower;
+import org.traccar.model.Network;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.Date;
+import java.util.regex.Pattern;
+
+public class UlbotechProtocolDecoder extends BaseProtocolDecoder {
+
+    public UlbotechProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final short DATA_GPS = 0x01;
+    private static final short DATA_LBS = 0x02;
+    private static final short DATA_STATUS = 0x03;
+    private static final short DATA_ODOMETER = 0x04;
+    private static final short DATA_ADC = 0x05;
+    private static final short DATA_GEOFENCE = 0x06;
+    private static final short DATA_OBD2 = 0x07;
+    private static final short DATA_FUEL = 0x08;
+    private static final short DATA_OBD2_ALARM = 0x09;
+    private static final short DATA_HARSH_DRIVER = 0x0A;
+    private static final short DATA_CANBUS = 0x0B;
+    private static final short DATA_J1708 = 0x0C;
+    private static final short DATA_VIN = 0x0D;
+    private static final short DATA_RFID = 0x0E;
+    private static final short DATA_EVENT = 0x10;
+
+    private void decodeObd(Position position, ByteBuf buf, int length) {
+
+        int end = buf.readerIndex() + length;
+
+        while (buf.readerIndex() < end) {
+            int parameterLength = buf.getUnsignedByte(buf.readerIndex()) >> 4;
+            int mode = buf.readUnsignedByte() & 0x0F;
+            position.add(ObdDecoder.decode(mode, ByteBufUtil.hexDump(buf.readSlice(parameterLength - 1))));
+        }
+    }
+
+    private void decodeJ1708(Position position, ByteBuf buf, int length) {
+
+        int end = buf.readerIndex() + length;
+
+        while (buf.readerIndex() < end) {
+            int mark = buf.readUnsignedByte();
+            int len = BitUtil.between(mark, 0, 6);
+            int type = BitUtil.between(mark, 6, 8);
+            int id = buf.readUnsignedByte();
+            if (type == 3) {
+                id += 256;
+            }
+            String value = ByteBufUtil.hexDump(buf.readSlice(len - 1));
+            if (type == 2 || type == 3) {
+                position.set("pid" + id, value);
+            }
+        }
+    }
+
+    private void decodeDriverBehavior(Position position, ByteBuf buf) {
+
+        int value = buf.readUnsignedByte();
+
+        if (BitUtil.check(value, 0)) {
+            position.set("rapidAcceleration", true);
+        }
+        if (BitUtil.check(value, 1)) {
+            position.set("roughBraking", true);
+        }
+        if (BitUtil.check(value, 2)) {
+            position.set("harshCourse", true);
+        }
+        if (BitUtil.check(value, 3)) {
+            position.set("noWarmUp", true);
+        }
+        if (BitUtil.check(value, 4)) {
+            position.set("longIdle", true);
+        }
+        if (BitUtil.check(value, 5)) {
+            position.set("fatigueDriving", true);
+        }
+        if (BitUtil.check(value, 6)) {
+            position.set("roughTerrain", true);
+        }
+        if (BitUtil.check(value, 7)) {
+            position.set("highRpm", true);
+        }
+    }
+
+    private String decodeAlarm(int alarm) {
+        if (BitUtil.check(alarm, 0)) {
+            return Position.ALARM_POWER_OFF;
+        }
+        if (BitUtil.check(alarm, 1)) {
+            return Position.ALARM_MOVEMENT;
+        }
+        if (BitUtil.check(alarm, 2)) {
+            return Position.ALARM_OVERSPEED;
+        }
+        if (BitUtil.check(alarm, 4)) {
+            return Position.ALARM_GEOFENCE;
+        }
+        if (BitUtil.check(alarm, 10)) {
+            return Position.ALARM_SOS;
+        }
+        return null;
+    }
+
+    private void decodeAdc(Position position, ByteBuf buf, int length) {
+        for (int i = 0; i < length / 2; i++) {
+            int value = buf.readUnsignedShort();
+            int id = BitUtil.from(value, 12);
+            value = BitUtil.to(value, 12);
+            switch (id) {
+                case 0:
+                    position.set(Position.KEY_POWER, value * (100 + 10) / 4096.0 - 10);
+                    break;
+                case 1:
+                    position.set(Position.PREFIX_TEMP + 1, value * (125 + 55) / 4096.0 - 55);
+                    break;
+                case 2:
+                    position.set(Position.KEY_BATTERY, value * (100 + 10) / 4096.0 - 10);
+                    break;
+                case 3:
+                    position.set(Position.PREFIX_ADC + 1, value * (100 + 10) / 4096.0 - 10);
+                    break;
+                default:
+                    position.set(Position.PREFIX_IO + id, value);
+                    break;
+            }
+        }
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("*TS")
+            .number("dd,")                       // protocol version
+            .number("(d{15}),")                  // device id
+            .number("(dd)(dd)(dd)")              // time
+            .number("(dd)(dd)(dd),")             // date
+            .expression("([^#]+)")               // command
+            .text("#")
+            .compile();
+
+    private Object decodeText(Channel channel, SocketAddress remoteAddress, String sentence) {
+
+        Parser parser = new Parser(PATTERN, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        DateBuilder dateBuilder = new DateBuilder()
+                .setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0))
+                .setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+
+        getLastLocation(position, dateBuilder.getDate());
+
+        position.set(Position.KEY_RESULT, parser.next());
+
+        return position;
+    }
+
+    private Object decodeBinary(Channel channel, SocketAddress remoteAddress, ByteBuf buf) {
+
+        buf.readUnsignedByte(); // header
+        buf.readUnsignedByte(); // version
+        buf.readUnsignedByte(); // type
+
+        String imei = ByteBufUtil.hexDump(buf.readSlice(8)).substring(1);
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        if (deviceSession.getTimeZone() == null) {
+            deviceSession.setTimeZone(getTimeZone(deviceSession.getDeviceId()));
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        long seconds = buf.readUnsignedInt() & 0x7fffffffL;
+        seconds += 946684800L; // 2000-01-01 00:00
+        seconds -= deviceSession.getTimeZone().getRawOffset() / 1000;
+        Date time = new Date(seconds * 1000);
+
+        boolean hasLocation = false;
+
+        while (buf.readableBytes() > 3) {
+
+            int type = buf.readUnsignedByte();
+            int length = type == DATA_CANBUS ? buf.readUnsignedShort() : buf.readUnsignedByte();
+
+            switch (type) {
+
+                case DATA_GPS:
+                    hasLocation = true;
+                    position.setValid(true);
+                    position.setLatitude(buf.readInt() / 1000000.0);
+                    position.setLongitude(buf.readInt() / 1000000.0);
+                    position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShort()));
+                    position.setCourse(buf.readUnsignedShort());
+                    position.set(Position.KEY_HDOP, buf.readUnsignedShort());
+                    break;
+
+                case DATA_LBS:
+                    if (length == 11) {
+                        position.setNetwork(new Network(CellTower.from(
+                                buf.readUnsignedShort(), buf.readUnsignedShort(),
+                                buf.readUnsignedShort(), buf.readUnsignedInt(), -buf.readUnsignedByte())));
+                    } else {
+                        position.setNetwork(new Network(CellTower.from(
+                                buf.readUnsignedShort(), buf.readUnsignedShort(),
+                                buf.readUnsignedShort(), buf.readUnsignedShort(), -buf.readUnsignedByte())));
+                    }
+                    if (length > 9 && length != 11) {
+                        buf.skipBytes(length - 9);
+                    }
+                    break;
+
+                case DATA_STATUS:
+                    int status = buf.readUnsignedShort();
+                    position.set(Position.KEY_IGNITION, BitUtil.check(status, 9));
+                    position.set(Position.KEY_STATUS, status);
+                    position.set(Position.KEY_ALARM, decodeAlarm(buf.readUnsignedShort()));
+                    break;
+
+                case DATA_ODOMETER:
+                    position.set(Position.KEY_ODOMETER, buf.readUnsignedInt());
+                    break;
+
+                case DATA_ADC:
+                    decodeAdc(position, buf, length);
+                    break;
+
+                case DATA_GEOFENCE:
+                    position.set("geofenceIn", buf.readUnsignedInt());
+                    position.set("geofenceAlarm", buf.readUnsignedInt());
+                    break;
+
+                case DATA_OBD2:
+                    decodeObd(position, buf, length);
+                    break;
+
+                case DATA_FUEL:
+                    position.set(Position.KEY_FUEL_CONSUMPTION, buf.readUnsignedInt() / 10000.0);
+                    break;
+
+                case DATA_OBD2_ALARM:
+                    decodeObd(position, buf, length);
+                    break;
+
+                case DATA_HARSH_DRIVER:
+                    decodeDriverBehavior(position, buf);
+                    break;
+
+                case DATA_CANBUS:
+                    position.set("can", ByteBufUtil.hexDump(buf.readSlice(length)));
+                    break;
+
+                case DATA_J1708:
+                    decodeJ1708(position, buf, length);
+                    break;
+
+                case DATA_VIN:
+                    position.set(Position.KEY_VIN, buf.readSlice(length).toString(StandardCharsets.US_ASCII));
+                    break;
+
+                case DATA_RFID:
+                    position.set(Position.KEY_DRIVER_UNIQUE_ID,
+                            buf.readSlice(length - 1).toString(StandardCharsets.US_ASCII));
+                    position.set("authorized", buf.readUnsignedByte() != 0);
+                    break;
+
+                case DATA_EVENT:
+                    position.set(Position.KEY_EVENT, buf.readUnsignedByte());
+                    if (length > 1) {
+                        position.set("eventMask", buf.readUnsignedInt());
+                    }
+                    break;
+
+                default:
+                    buf.skipBytes(length);
+                    break;
+            }
+        }
+
+        if (!hasLocation) {
+            getLastLocation(position, time);
+        } else {
+            position.setTime(time);
+        }
+
+        return position;
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        if (buf.getUnsignedByte(buf.readerIndex()) == 0xF8) {
+
+            if (channel != null) {
+                ByteBuf response = Unpooled.buffer();
+                response.writeByte(0xF8);
+                response.writeByte(DATA_GPS);
+                response.writeByte(0xFE);
+                response.writeShort(buf.getShort(response.writerIndex() - 1 - 2));
+                response.writeShort(Checksum.crc16(Checksum.CRC16_XMODEM, response.nioBuffer(1, 4)));
+                response.writeByte(0xF8);
+                channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
+            }
+
+            return decodeBinary(channel, remoteAddress, buf);
+        } else {
+
+            if (channel != null) {
+                channel.writeAndFlush(new NetworkMessage(Unpooled.copiedBuffer(String.format("*TS01,ACK:%04X#",
+                        Checksum.crc16(Checksum.CRC16_XMODEM, buf.nioBuffer(1, buf.writerIndex() - 2))),
+                        StandardCharsets.US_ASCII), remoteAddress));
+            }
+
+            return decodeText(channel, remoteAddress, buf.toString(StandardCharsets.US_ASCII));
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/UproProtocol.java b/src/main/java/org/traccar/protocol/UproProtocol.java
new file mode 100644
index 000000000..4e60ffeb6
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/UproProtocol.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.CharacterDelimiterFrameDecoder;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class UproProtocol extends BaseProtocol {
+
+    public UproProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, '#'));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new UproProtocolDecoder(UproProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/UproProtocolDecoder.java b/src/main/java/org/traccar/protocol/UproProtocolDecoder.java
new file mode 100644
index 000000000..dc7a9200d
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/UproProtocolDecoder.java
@@ -0,0 +1,212 @@
+/*
+ * Copyright 2012 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.ByteBufUtil;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.CellTower;
+import org.traccar.model.Network;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.regex.Pattern;
+
+public class UproProtocolDecoder extends BaseProtocolDecoder {
+
+    public UproProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN_HEADER = new PatternBuilder()
+            .text("*")
+            .expression("(..20)")                // head
+            .expression("([01])")                // ack
+            .number("(d+),")                     // device id
+            .expression("(.)")                   // type
+            .expression("(.)")                   // subtype
+            .any()
+            .compile();
+
+    private static final Pattern PATTERN_LOCATION = new PatternBuilder()
+            .number("(dd)(dd)(dd)")              // time (hhmmss)
+            .number("(dd)(dd)(dddd)")            // latitude
+            .number("(ddd)(dd)(dddd)")           // longitude
+            .number("(d)")                       // flags
+            .number("(dd)")                      // speed
+            .number("(dd)")                      // course
+            .number("(dd)(dd)(dd)")              // date (ddmmyy)
+            .compile();
+
+    private void decodeLocation(Position position, String data) {
+        Parser parser = new Parser(PATTERN_LOCATION, data);
+        if (parser.matches()) {
+
+            DateBuilder dateBuilder = new DateBuilder()
+                    .setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+
+            position.setValid(true);
+            position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_MIN_MIN));
+            position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_MIN_MIN));
+
+            int flags = parser.nextInt(0);
+            position.setValid(BitUtil.check(flags, 0));
+            if (!BitUtil.check(flags, 1)) {
+                position.setLatitude(-position.getLatitude());
+            }
+            if (!BitUtil.check(flags, 2)) {
+                position.setLongitude(-position.getLongitude());
+            }
+
+            position.setSpeed(parser.nextInt(0) * 2);
+            position.setCourse(parser.nextInt(0) * 10);
+
+            dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+            position.setTime(dateBuilder.getDate());
+
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        if (buf.getByte(buf.readerIndex()) != '*') {
+            return null;
+        }
+
+        int headerIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '&');
+        if (headerIndex < 0) {
+            headerIndex = buf.writerIndex();
+        }
+        String header = buf.readSlice(headerIndex - buf.readerIndex()).toString(StandardCharsets.US_ASCII);
+
+        Parser parser = new Parser(PATTERN_HEADER, header);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        String head = parser.next();
+        boolean reply = parser.next().equals("1");
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        String type = parser.next();
+        String subtype = parser.next();
+
+        if (reply && channel != null) {
+            channel.writeAndFlush(new NetworkMessage("*" + head + "Y" + type + subtype + "#", remoteAddress));
+        }
+
+        while (buf.isReadable()) {
+
+            buf.readByte(); // skip delimiter
+
+            byte dataType = buf.readByte();
+
+            int delimiterIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '&');
+            if (delimiterIndex < 0) {
+                delimiterIndex = buf.writerIndex();
+            }
+
+            ByteBuf data = buf.readSlice(delimiterIndex - buf.readerIndex());
+
+            switch (dataType) {
+                case 'A':
+                    decodeLocation(position, data.toString(StandardCharsets.US_ASCII));
+                    break;
+                case 'B':
+                    position.set(Position.KEY_STATUS, data.toString(StandardCharsets.US_ASCII));
+                    break;
+                case 'C':
+                    long odometer = 0;
+                    while (data.isReadable()) {
+                        odometer <<= 4;
+                        odometer += data.readByte() - (byte) '0';
+                    }
+                    position.set(Position.KEY_ODOMETER, odometer * 2 * 1852 / 3600);
+                    break;
+                case 'F':
+                    position.setSpeed(
+                            Integer.parseInt(data.readSlice(4).toString(StandardCharsets.US_ASCII)) * 0.1);
+                    break;
+                case 'K':
+                    position.set("statusExtended", data.toString(StandardCharsets.US_ASCII));
+                    break;
+                case 'P':
+                    if (data.readableBytes() >= 16) {
+                        position.setNetwork(new Network(CellTower.from(
+                                Integer.parseInt(data.readSlice(4).toString(StandardCharsets.US_ASCII)),
+                                Integer.parseInt(data.readSlice(4).toString(StandardCharsets.US_ASCII)),
+                                Integer.parseInt(data.readSlice(4).toString(StandardCharsets.US_ASCII), 16),
+                                Integer.parseInt(data.readSlice(4).toString(StandardCharsets.US_ASCII), 16))));
+                    }
+                    break;
+                case 'Q':
+                    position.set("obdPid", ByteBufUtil.hexDump(data));
+                    break;
+                case 'R':
+                    if (head.startsWith("HQ")) {
+                        position.set(Position.KEY_RSSI,
+                                Integer.parseInt(data.readSlice(2).toString(StandardCharsets.US_ASCII)));
+                        position.set(Position.KEY_SATELLITES,
+                                Integer.parseInt(data.readSlice(2).toString(StandardCharsets.US_ASCII)));
+                    } else {
+                        position.set("odbTravel", ByteBufUtil.hexDump(data));
+                    }
+                    break;
+                case 'S':
+                    position.set("obdTraffic", ByteBufUtil.hexDump(data));
+                    break;
+                case 'T':
+                    position.set(Position.KEY_BATTERY_LEVEL,
+                            Integer.parseInt(data.readSlice(2).toString(StandardCharsets.US_ASCII)));
+                    break;
+                case 'V':
+                    position.set(Position.KEY_POWER,
+                            Integer.parseInt(data.readSlice(4).toString(StandardCharsets.US_ASCII)) * 0.1);
+                    break;
+                default:
+                    break;
+            }
+
+        }
+
+        if (position.getLatitude() != 0 && position.getLongitude() != 0) {
+            return position;
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/V680Protocol.java b/src/main/java/org/traccar/protocol/V680Protocol.java
new file mode 100644
index 000000000..dc0922cd4
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/V680Protocol.java
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.CharacterDelimiterFrameDecoder;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class V680Protocol extends BaseProtocol {
+
+    public V680Protocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, "##"));
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new V680ProtocolDecoder(V680Protocol.this));
+            }
+        });
+        addServer(new TrackerServer(true, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new V680ProtocolDecoder(V680Protocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/V680ProtocolDecoder.java b/src/main/java/org/traccar/protocol/V680ProtocolDecoder.java
new file mode 100644
index 000000000..0342404a6
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/V680ProtocolDecoder.java
@@ -0,0 +1,132 @@
+/*
+ * Copyright 2012 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class V680ProtocolDecoder extends BaseProtocolDecoder {
+
+    public V680ProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .groupBegin()
+            .number("#(d+)#")                    // imei
+            .expression("([^#]*)#")              // user
+            .groupEnd("?")
+            .number("(d+)#")                     // fix
+            .expression("([^#]+)#")              // password
+            .expression("([^#]+)#")              // event
+            .number("(d+)#")                     // packet number
+            .expression("([^#]+)?#?")            // gsm base station
+            .expression("(?:[^#]+#)?")
+            .number("(d+.d+),([EW]),")           // longitude
+            .number("(d+.d+),([NS]),")           // latitude
+            .number("(d+.d+),")                  // speed
+            .number("(d+.?d*)?#")                // course
+            .number("(dd)(dd)(dd)#")             // date (ddmmyy)
+            .number("(dd)(dd)(dd)")              // time (hhmmss)
+            .any()
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        String sentence = (String) msg;
+        sentence = sentence.trim();
+
+        if (sentence.length() == 16) {
+
+            getDeviceSession(channel, remoteAddress, sentence.substring(1, sentence.length()));
+
+        } else {
+
+            Parser parser = new Parser(PATTERN, sentence);
+            if (!parser.matches()) {
+                return null;
+            }
+
+            Position position = new Position(getProtocolName());
+
+            DeviceSession deviceSession;
+            if (parser.hasNext()) {
+                deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+            } else {
+                deviceSession = getDeviceSession(channel, remoteAddress);
+            }
+            if (deviceSession == null) {
+                return null;
+            }
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            position.set("user", parser.next());
+            position.setValid(parser.nextInt(0) > 0);
+            position.set("password", parser.next());
+            position.set(Position.KEY_EVENT, parser.next());
+            position.set("packet", parser.next());
+            position.set("lbsData", parser.next());
+
+            double lon = parser.nextDouble(0);
+            boolean west = parser.next().equals("W");
+            double lat = parser.nextDouble(0);
+            boolean south = parser.next().equals("S");
+
+            if (lat > 90 || lon > 180) {
+                int lonDegrees = (int) (lon * 0.01);
+                lon = (lon - lonDegrees * 100) / 60.0;
+                lon += lonDegrees;
+
+                int latDegrees = (int) (lat * 0.01);
+                lat = (lat - latDegrees * 100) / 60.0;
+                lat += latDegrees;
+            }
+
+            position.setLongitude(west ? -lon : lon);
+            position.setLatitude(south ? -lat : lat);
+
+            position.setSpeed(parser.nextDouble(0));
+            position.setCourse(parser.nextDouble(0));
+
+            int day = parser.nextInt(0);
+            int month = parser.nextInt(0);
+            if (day == 0 && month == 0) {
+                return null; // invalid date
+            }
+
+            DateBuilder dateBuilder = new DateBuilder()
+                    .setDate(parser.nextInt(0), month, day)
+                    .setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+            position.setTime(dateBuilder.getDate());
+
+            return position;
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/VisiontekProtocol.java b/src/main/java/org/traccar/protocol/VisiontekProtocol.java
new file mode 100644
index 000000000..2c6af45a8
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/VisiontekProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.CharacterDelimiterFrameDecoder;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class VisiontekProtocol extends BaseProtocol {
+
+    public VisiontekProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, '#'));
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new VisiontekProtocolDecoder(VisiontekProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/VisiontekProtocolDecoder.java b/src/main/java/org/traccar/protocol/VisiontekProtocolDecoder.java
new file mode 100644
index 000000000..c4787bda2
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/VisiontekProtocolDecoder.java
@@ -0,0 +1,138 @@
+/*
+ * Copyright 2014 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class VisiontekProtocolDecoder extends BaseProtocolDecoder {
+
+    public VisiontekProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("$1,")
+            .expression("([^,]+),")              // identifier
+            .number("(d+),").optional()          // imei
+            .number("(dd),(dd),(dd),")           // date (dd,mm,yy)
+            .number("(dd),(dd),(dd),")           // time (hh,mm,ss)
+            .groupBegin()
+            .number("(dd)(dd).?(d+)([NS]),")     // latitude
+            .number("(ddd)(dd).?(d+)([EW]),")    // longitude
+            .or()
+            .number("(dd.d+)([NS]),")            // latitude
+            .number("(ddd.d+)([EW]),")           // longitude
+            .groupEnd()
+            .number("(d+.?d+),")                 // speed
+            .number("(d+),")                     // course
+            .groupBegin()
+            .number("(d+),")                     // altitude
+            .number("(d+),")                     // satellites
+            .number("(d+),")                     // odometer
+            .number("([01]),")                   // ignition
+            .number("([01]),")                   // input 1
+            .number("([01]),")                   // input 2
+            .number("([01]),")                   // immobilizer
+            .number("([01]),")                   // external battery status
+            .number("(d+),")                     // gsm
+            .or()
+            .number("(d+.d),")                   // hdop
+            .number("(d+),")                     // altitude
+            .number("(d+),")                     // odometer
+            .number("([01],[01],[01],[01]),")    // input
+            .number("([01],[01],[01],[01]),")    // output
+            .number("(d+.?d*),")                 // adc 1
+            .number("(d+.?d*),")                 // adc 2
+            .groupEnd("?")
+            .any()
+            .expression("([AV])")                // validity
+            .number(",(d{10})").optional()       // rfid
+            .any()
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next(), parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
+
+        if (parser.hasNext(8)) {
+            position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_MIN_MIN_HEM));
+            position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_MIN_MIN_HEM));
+        }
+        if (parser.hasNext(4)) {
+            position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM));
+            position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM));
+        }
+
+        position.setSpeed(UnitsConverter.knotsFromKph(Double.parseDouble(
+                parser.next().replace(".", "")) / 10));
+
+        position.setCourse(parser.nextDouble(0));
+
+        if (parser.hasNext(9)) {
+            position.setAltitude(parser.nextDouble(0));
+            position.set(Position.KEY_SATELLITES, parser.nextInt());
+            position.set(Position.KEY_ODOMETER, parser.nextInt(0) * 1000);
+            position.set(Position.KEY_IGNITION, parser.next().equals("1"));
+            position.set(Position.PREFIX_IO + 1, parser.next());
+            position.set(Position.PREFIX_IO + 2, parser.next());
+            position.set("immobilizer", parser.next());
+            position.set(Position.KEY_CHARGE, parser.next().equals("1"));
+            position.set(Position.KEY_RSSI, parser.nextDouble());
+        }
+
+        if (parser.hasNext(7)) {
+            position.set(Position.KEY_HDOP, parser.nextDouble());
+            position.setAltitude(parser.nextDouble(0));
+            position.set(Position.KEY_ODOMETER, parser.nextInt(0) * 1000);
+            position.set(Position.KEY_INPUT, parser.next());
+            position.set(Position.KEY_OUTPUT, parser.next());
+            position.set(Position.PREFIX_ADC + 1, parser.next());
+            position.set(Position.PREFIX_ADC + 2, parser.next());
+        }
+
+        position.setValid(parser.next().equals("A"));
+
+        position.set(Position.KEY_DRIVER_UNIQUE_ID, parser.next());
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Vt200FrameDecoder.java b/src/main/java/org/traccar/protocol/Vt200FrameDecoder.java
new file mode 100644
index 000000000..0fd83e715
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Vt200FrameDecoder.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseFrameDecoder;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+
+public class Vt200FrameDecoder extends BaseFrameDecoder {
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+        int endIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) ')') + 1;
+        if (endIndex > 0) {
+
+            ByteBuf frame = Unpooled.buffer();
+
+            while (buf.readerIndex() < endIndex) {
+                int b = buf.readByte();
+                if (b == '=') {
+                    frame.writeByte(buf.readByte() ^ '=');
+                } else {
+                    frame.writeByte(b);
+                }
+            }
+
+            return frame;
+
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Vt200Protocol.java b/src/main/java/org/traccar/protocol/Vt200Protocol.java
new file mode 100644
index 000000000..2a9ef6ab5
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Vt200Protocol.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class Vt200Protocol extends BaseProtocol {
+
+    public Vt200Protocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new Vt200FrameDecoder());
+                pipeline.addLast(new Vt200ProtocolDecoder(Vt200Protocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Vt200ProtocolDecoder.java b/src/main/java/org/traccar/protocol/Vt200ProtocolDecoder.java
new file mode 100644
index 000000000..b1564abd9
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Vt200ProtocolDecoder.java
@@ -0,0 +1,150 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.ByteBufUtil;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.BcdUtil;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.Arrays;
+import java.util.Date;
+
+public class Vt200ProtocolDecoder extends BaseProtocolDecoder {
+
+    public Vt200ProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static double decodeCoordinate(int value) {
+        int degrees = value / 1000000;
+        int minutes = value % 1000000;
+        return degrees + minutes * 0.0001 / 60;
+    }
+
+    protected Date decodeDate(ByteBuf buf) {
+        DateBuilder dateBuilder = new DateBuilder()
+                .setDateReverse(BcdUtil.readInteger(buf, 2), BcdUtil.readInteger(buf, 2), BcdUtil.readInteger(buf, 2))
+                .setTime(BcdUtil.readInteger(buf, 2), BcdUtil.readInteger(buf, 2), BcdUtil.readInteger(buf, 2));
+        return dateBuilder.getDate();
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        buf.skipBytes(1); // header
+
+        String id = ByteBufUtil.hexDump(buf.readSlice(6));
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, id);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        int type = buf.readUnsignedShort();
+        buf.readUnsignedShort(); // length
+
+        if (type == 0x2086 || type == 0x2084 || type == 0x2082) {
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            buf.readUnsignedByte(); // data type
+            buf.readUnsignedShort(); // trip id
+
+            position.setTime(decodeDate(buf));
+
+            position.setLatitude(decodeCoordinate(BcdUtil.readInteger(buf, 8)));
+            position.setLongitude(decodeCoordinate(BcdUtil.readInteger(buf, 9)));
+
+            int flags = buf.readUnsignedByte();
+            position.setValid(BitUtil.check(flags, 0));
+            if (!BitUtil.check(flags, 1)) {
+                position.setLatitude(-position.getLatitude());
+            }
+            if (!BitUtil.check(flags, 2)) {
+                position.setLongitude(-position.getLongitude());
+            }
+
+            position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte()));
+            position.setCourse(buf.readUnsignedByte() * 2);
+
+            position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
+            position.set(Position.KEY_RSSI, buf.readUnsignedByte());
+            position.set(Position.KEY_ODOMETER, buf.readUnsignedInt() * 1000);
+            position.set(Position.KEY_STATUS, buf.readUnsignedInt());
+
+            // additional data
+
+            return position;
+
+        } else if (type == 0x3088) {
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            getLastLocation(position, null);
+
+            buf.readUnsignedShort(); // trip id
+            buf.skipBytes(8); // imei
+            buf.skipBytes(8); // imsi
+
+            position.set("tripStart", decodeDate(buf).getTime());
+            position.set("tripEnd", decodeDate(buf).getTime());
+            position.set("drivingTime", buf.readUnsignedShort());
+
+            position.set(Position.KEY_FUEL_CONSUMPTION, buf.readUnsignedInt());
+            position.set(Position.KEY_ODOMETER_TRIP, buf.readUnsignedInt());
+
+            position.set("maxSpeed", UnitsConverter.knotsFromKph(buf.readUnsignedByte()));
+            position.set("maxRpm", buf.readUnsignedShort());
+            position.set("maxTemp", buf.readUnsignedByte() - 40);
+            position.set("hardAccelerationCount", buf.readUnsignedByte());
+            position.set("hardBrakingCount", buf.readUnsignedByte());
+
+            for (String speedType : Arrays.asList("over", "high", "normal", "low")) {
+                position.set(speedType + "SpeedTime", buf.readUnsignedShort());
+                position.set(speedType + "SpeedDistance", buf.readUnsignedInt());
+                position.set(speedType + "SpeedFuel", buf.readUnsignedInt());
+            }
+
+            position.set("idleTime", buf.readUnsignedShort());
+            position.set("idleFuel", buf.readUnsignedInt());
+
+            position.set("hardCorneringCount", buf.readUnsignedByte());
+            position.set("overspeedCount", buf.readUnsignedByte());
+            position.set("overheatCount", buf.readUnsignedShort());
+            position.set("laneChangeCount", buf.readUnsignedByte());
+            position.set("emergencyRefueling", buf.readUnsignedByte());
+
+            return position;
+
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/VtfmsFrameDecoder.java b/src/main/java/org/traccar/protocol/VtfmsFrameDecoder.java
new file mode 100644
index 000000000..62a189960
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/VtfmsFrameDecoder.java
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseFrameDecoder;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+
+public class VtfmsFrameDecoder extends BaseFrameDecoder {
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+        int endIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) ')');
+        if (endIndex > 0) {
+            endIndex += 1 + 3;
+            if (buf.writerIndex() >= endIndex) {
+                return buf.readRetainedSlice(endIndex - buf.readerIndex());
+            }
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/VtfmsProtocol.java b/src/main/java/org/traccar/protocol/VtfmsProtocol.java
new file mode 100644
index 000000000..2826a86e6
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/VtfmsProtocol.java
@@ -0,0 +1,44 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+import io.netty.handler.codec.string.StringDecoder;
+
+public class VtfmsProtocol extends BaseProtocol {
+
+    public VtfmsProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new VtfmsFrameDecoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new VtfmsProtocolDecoder(VtfmsProtocol.this));
+            }
+        });
+        addServer(new TrackerServer(true, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new VtfmsProtocolDecoder(VtfmsProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/VtfmsProtocolDecoder.java b/src/main/java/org/traccar/protocol/VtfmsProtocolDecoder.java
new file mode 100644
index 000000000..17fac4311
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/VtfmsProtocolDecoder.java
@@ -0,0 +1,167 @@
+/*
+ * Copyright 2017 - 2019 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class VtfmsProtocolDecoder extends BaseProtocolDecoder {
+
+    private static final String[] DIRECTIONS = new String[] {"N", "NE", "E", "SE", "S", "SW", "W", "NW"};
+
+    public VtfmsProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("(")
+            .number("(d{15}),")                  // imei
+            .number("[0-9A-Z]{3}dd,")            // packet count
+            .number("(dd),")                     // packet id
+            .number("[^,]*,")                    // reserved
+            .number("(d+)?,")                    // rssi
+            .number("(?:d+)?,")                  // fix status
+            .number("(d+)?,")                    // satellites
+            .number("[^,]*,")                    // reserved
+            .expression("([AV]),")               // validity
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .number("(dd)(dd)(dd),")             // time (ddmmyy)
+            .number("(-?d+.d+),")                // latitude
+            .number("(-?d+.d+),")                // longitude
+            .number("(?:(d+)|([NESW]{1,2})),")   // course
+            .number("(d+),")                     // speed
+            .number("(d+),")                     // hours
+            .number("(d+),")                     // idle hours
+            .expression("[KNT],")                // antenna status
+            .number("(d+),")                     // odometer
+            .expression("([01]),")               // power status
+            .number("(d+.d+),")                  // power voltage
+            .number("[^,]*,")                    // reserved
+            .number("(d+)?,")                    // fuel level
+            .number("(d+.d+)?,")                 // adc 1
+            .number("[^,]*,")                    // reserved
+            .number("(d+.d+)?,")                 // adc 2
+            .expression("([01]),")               // di 1
+            .expression("([01]),")               // di 2
+            .expression("([01]),")               // di 3
+            .expression("([01]),")               // di 4
+            .expression("([01]),")               // do 1
+            .expression("([01]),")               // do 2
+            .expression("([01]),")               // do 3
+            .number("[^,]*,")                    // reserved
+            .number("[^,]*")                     // reserved
+            .text(")")
+            .number("ddd")                       // checksum
+            .compile();
+
+    private String decodeAlarm(int value) {
+        switch (value) {
+            case 10:
+                return Position.ALARM_OVERSPEED;
+            case 14:
+                return Position.ALARM_POWER_CUT;
+            case 15:
+                return Position.ALARM_POWER_RESTORED;
+            case 32:
+                return Position.ALARM_BRAKING;
+            case 33:
+                return Position.ALARM_ACCELERATION;
+            default:
+                return null;
+        }
+    }
+
+    private double convertToDegrees(double value) {
+        double degrees = Math.floor(value / 100);
+        return degrees + (value - degrees * 100) / 60;
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.set(Position.KEY_ALARM, decodeAlarm(parser.nextInt()));
+        position.set(Position.KEY_RSSI, parser.nextInt());
+        position.set(Position.KEY_SATELLITES, parser.nextInt());
+
+        position.setValid(parser.next().equals("A"));
+        position.setTime(parser.nextDateTime(Parser.DateTimeFormat.HMS_DMY));
+
+        double latitude = parser.nextDouble();
+        double longitude = parser.nextDouble();
+        if (Math.abs(latitude) > 90 || Math.abs(longitude) > 180) {
+            position.setLatitude(convertToDegrees(latitude));
+            position.setLongitude(convertToDegrees(longitude));
+        } else {
+            position.setLatitude(latitude);
+            position.setLongitude(longitude);
+        }
+
+        position.setCourse(parser.nextDouble(0));
+        if (parser.hasNext()) {
+            String direction = parser.next();
+            for (int i = 0; i < DIRECTIONS.length; i++) {
+                if (direction.equals(DIRECTIONS[i])) {
+                    position.setCourse(i * 45.0);
+                    break;
+                }
+            }
+        }
+
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble()));
+
+        position.set(Position.KEY_HOURS, UnitsConverter.msFromHours(parser.nextInt()));
+        position.set("idleHours", parser.nextInt());
+        position.set(Position.KEY_ODOMETER, parser.nextInt() * 100);
+        position.set(Position.KEY_CHARGE, parser.next().equals("1"));
+        position.set(Position.KEY_POWER, parser.nextDouble());
+        position.set(Position.KEY_FUEL_LEVEL, parser.nextInt());
+        position.set(Position.PREFIX_ADC + 1, parser.nextDouble());
+        position.set(Position.PREFIX_ADC + 2, parser.nextDouble());
+        position.set(Position.PREFIX_IN + 1, parser.nextInt());
+        position.set(Position.PREFIX_IN + 2, parser.nextInt());
+        position.set(Position.PREFIX_IN + 3, parser.nextInt());
+        position.set(Position.PREFIX_IN + 4, parser.nextInt());
+        position.set(Position.PREFIX_OUT + 1, parser.nextInt());
+        position.set(Position.PREFIX_OUT + 2, parser.nextInt());
+        position.set(Position.PREFIX_OUT + 3, parser.nextInt());
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/WatchFrameDecoder.java b/src/main/java/org/traccar/protocol/WatchFrameDecoder.java
new file mode 100644
index 000000000..f99bd52e2
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/WatchFrameDecoder.java
@@ -0,0 +1,67 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+import org.traccar.BaseFrameDecoder;
+
+public class WatchFrameDecoder extends BaseFrameDecoder {
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+        int endIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) ']') + 1;
+        if (endIndex > 0) {
+            ByteBuf frame = Unpooled.buffer();
+            while (buf.readerIndex() < endIndex) {
+                byte b1 = buf.readByte();
+                if (b1 == '}') {
+                    byte b2 = buf.readByte();
+                    switch (b2) {
+                        case 0x01:
+                            frame.writeByte('}');
+                            break;
+                        case 0x02:
+                            frame.writeByte('[');
+                            break;
+                        case 0x03:
+                            frame.writeByte(']');
+                            break;
+                        case 0x04:
+                            frame.writeByte(',');
+                            break;
+                        case 0x05:
+                            frame.writeByte('*');
+                            break;
+                        default:
+                            throw new IllegalArgumentException(String.format(
+                                    "unexpected byte at %d: 0x%02x", buf.readerIndex() - 1, b2));
+                    }
+                } else {
+                    frame.writeByte(b1);
+                }
+            }
+            return frame;
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/WatchProtocol.java b/src/main/java/org/traccar/protocol/WatchProtocol.java
new file mode 100644
index 000000000..fe285e70d
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/WatchProtocol.java
@@ -0,0 +1,53 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+import org.traccar.model.Command;
+
+public class WatchProtocol extends BaseProtocol {
+
+    public WatchProtocol() {
+        setSupportedDataCommands(
+                Command.TYPE_CUSTOM,
+                Command.TYPE_POSITION_SINGLE,
+                Command.TYPE_POSITION_PERIODIC,
+                Command.TYPE_SOS_NUMBER,
+                Command.TYPE_ALARM_SOS,
+                Command.TYPE_ALARM_BATTERY,
+                Command.TYPE_REBOOT_DEVICE,
+                Command.TYPE_POWER_OFF,
+                Command.TYPE_ALARM_REMOVE,
+                Command.TYPE_SILENCE_TIME,
+                Command.TYPE_ALARM_CLOCK,
+                Command.TYPE_SET_PHONEBOOK,
+                Command.TYPE_MESSAGE,
+                Command.TYPE_VOICE_MESSAGE,
+                Command.TYPE_SET_TIMEZONE,
+                Command.TYPE_SET_INDICATOR);
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new WatchFrameDecoder());
+                pipeline.addLast(new WatchProtocolEncoder());
+                pipeline.addLast(new WatchProtocolDecoder(WatchProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/WatchProtocolDecoder.java b/src/main/java/org/traccar/protocol/WatchProtocolDecoder.java
new file mode 100644
index 000000000..70b207e9b
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/WatchProtocolDecoder.java
@@ -0,0 +1,329 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.Context;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.BitUtil;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.CellTower;
+import org.traccar.model.Network;
+import org.traccar.model.Position;
+import org.traccar.model.WifiAccessPoint;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.Date;
+import java.util.regex.Pattern;
+
+public class WatchProtocolDecoder extends BaseProtocolDecoder {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(WatchProtocolDecoder.class);
+
+    public WatchProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN_POSITION = new PatternBuilder()
+            .number("(dd)(dd)(dd),")             // date (ddmmyy)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .expression("([AV]),")               // validity
+            .number(" *(-?d+.d+),")              // latitude
+            .expression("([NS]),")
+            .number(" *(-?d+.d+),")              // longitude
+            .expression("([EW])?,")
+            .number("(d+.?d*),")                 // speed
+            .number("(d+.?d*),")                 // course
+            .number("(d+.?d*),")                 // altitude
+            .number("(d+),")                     // satellites
+            .number("(d+),")                     // rssi
+            .number("(d+),")                     // battery
+            .number("(d+),")                     // steps
+            .number("d+,")                       // tumbles
+            .number("(x+),")                     // status
+            .expression("(.*)")                  // cell and wifi
+            .compile();
+
+    private void sendResponse(Channel channel, String id, String index, String content) {
+        if (channel != null) {
+            String response;
+            if (index != null) {
+                response = String.format("[%s*%s*%s*%04x*%s]",
+                        manufacturer, id, index, content.length(), content);
+            } else {
+                response = String.format("[%s*%s*%04x*%s]",
+                        manufacturer, id, content.length(), content);
+            }
+            ByteBuf buf = Unpooled.copiedBuffer(response, StandardCharsets.US_ASCII);
+            channel.writeAndFlush(new NetworkMessage(buf, channel.remoteAddress()));
+        }
+    }
+
+    private String decodeAlarm(int status) {
+        if (BitUtil.check(status, 0)) {
+            return Position.ALARM_LOW_BATTERY;
+        } else if (BitUtil.check(status, 1)) {
+            return Position.ALARM_GEOFENCE_EXIT;
+        } else if (BitUtil.check(status, 2)) {
+            return Position.ALARM_GEOFENCE_ENTER;
+        } else if (BitUtil.check(status, 3)) {
+            return Position.ALARM_OVERSPEED;
+        } else if (BitUtil.check(status, 16)) {
+            return Position.ALARM_SOS;
+        } else if (BitUtil.check(status, 17)) {
+            return Position.ALARM_LOW_BATTERY;
+        } else if (BitUtil.check(status, 18)) {
+            return Position.ALARM_GEOFENCE_EXIT;
+        } else if (BitUtil.check(status, 19)) {
+            return Position.ALARM_GEOFENCE_ENTER;
+        } else if (BitUtil.check(status, 20)) {
+            return Position.ALARM_REMOVING;
+        } else if (BitUtil.check(status, 21)) {
+            return Position.ALARM_FALL_DOWN;
+        }
+        return null;
+    }
+
+    private Position decodePosition(DeviceSession deviceSession, String data) {
+
+        Parser parser = new Parser(PATTERN_POSITION, data);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
+
+        position.setValid(parser.next().equals("A"));
+        position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM));
+        position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM));
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
+        position.setCourse(parser.nextDouble(0));
+        position.setAltitude(parser.nextDouble(0));
+
+        position.set(Position.KEY_SATELLITES, parser.nextInt(0));
+        position.set(Position.KEY_RSSI, parser.nextInt(0));
+        position.set(Position.KEY_BATTERY_LEVEL, parser.nextInt(0));
+
+        position.set(Position.KEY_STEPS, parser.nextInt(0));
+
+        int status = parser.nextHexInt(0);
+        position.set(Position.KEY_ALARM, decodeAlarm(status));
+        if (BitUtil.check(status, 4)) {
+            position.set(Position.KEY_MOTION, true);
+        }
+
+        String[] values = parser.next().split(",");
+        int index = 0;
+
+        Network network = new Network();
+
+        int cellCount = Integer.parseInt(values[index++]);
+        index += 1; // timing advance
+        int mcc = Integer.parseInt(values[index++]);
+        int mnc = Integer.parseInt(values[index++]);
+
+        for (int i = 0; i < cellCount; i++) {
+            network.addCellTower(CellTower.from(mcc, mnc,
+                    Integer.parseInt(values[index++]), Integer.parseInt(values[index++]),
+                    Integer.parseInt(values[index++])));
+        }
+
+        if (index < values.length && !values[index].isEmpty()) {
+            int wifiCount = Integer.parseInt(values[index++]);
+
+            for (int i = 0; i < wifiCount; i++) {
+                index += 1; // wifi name
+                network.addWifiAccessPoint(WifiAccessPoint.from(
+                        values[index++], Integer.parseInt(values[index++])));
+            }
+        }
+
+        if (network.getCellTowers() != null || network.getWifiAccessPoints() != null) {
+            position.setNetwork(network);
+        }
+
+        return position;
+    }
+
+    private boolean hasIndex;
+    private String manufacturer;
+
+    public boolean getHasIndex() {
+        return hasIndex;
+    }
+
+    public String getManufacturer() {
+        return manufacturer;
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        buf.skipBytes(1); // '[' header
+        manufacturer = buf.readSlice(2).toString(StandardCharsets.US_ASCII);
+        buf.skipBytes(1); // '*' delimiter
+
+        int idIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '*');
+        String id = buf.readSlice(idIndex - buf.readerIndex()).toString(StandardCharsets.US_ASCII);
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, id);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        buf.skipBytes(1); // '*' delimiter
+
+        String index = null;
+        int contentIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '*');
+        if (contentIndex + 5 < buf.writerIndex() && buf.getByte(contentIndex + 5) == '*'
+                && buf.toString(contentIndex + 1, 4, StandardCharsets.US_ASCII).matches("\\p{XDigit}+")) {
+            int indexLength = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '*') - buf.readerIndex();
+            hasIndex = true;
+            index = buf.readSlice(indexLength).toString(StandardCharsets.US_ASCII);
+            buf.skipBytes(1); // '*' delimiter
+        }
+
+        buf.skipBytes(4); // length
+        buf.skipBytes(1); // '*' delimiter
+
+        buf.writerIndex(buf.writerIndex() - 1); // ']' ignore ending
+
+        contentIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) ',');
+        if (contentIndex < 0) {
+            contentIndex = buf.writerIndex();
+        }
+
+        String type = buf.readSlice(contentIndex - buf.readerIndex()).toString(StandardCharsets.US_ASCII);
+
+        if (contentIndex < buf.writerIndex()) {
+            buf.readerIndex(contentIndex + 1);
+        }
+
+        if (type.equals("INIT")) {
+
+            sendResponse(channel, id, index, "INIT,1");
+
+        } else if (type.equals("LK")) {
+
+            sendResponse(channel, id, index, "LK");
+
+            if (buf.isReadable()) {
+                String[] values = buf.toString(StandardCharsets.US_ASCII).split(",");
+                if (values.length >= 3) {
+                    Position position = new Position(getProtocolName());
+                    position.setDeviceId(deviceSession.getDeviceId());
+
+                    getLastLocation(position, null);
+
+                    position.set(Position.KEY_BATTERY_LEVEL, Integer.parseInt(values[2]));
+
+                    return position;
+                }
+            }
+
+        } else if (type.equals("UD") || type.equals("UD2") || type.equals("UD3")
+                || type.equals("AL") || type.equals("WT")) {
+
+            Position position = decodePosition(deviceSession, buf.toString(StandardCharsets.US_ASCII));
+
+            if (type.equals("AL")) {
+                if (position != null) {
+                    position.set(Position.KEY_ALARM, Position.ALARM_SOS);
+                }
+                sendResponse(channel, id, index, "AL");
+            }
+
+            return position;
+
+        } else if (type.equals("TKQ")) {
+
+            sendResponse(channel, id, index, "TKQ");
+
+        } else if (type.equals("PULSE") || type.equals("heart") || type.equals("bphrt")) {
+
+            if (buf.isReadable()) {
+
+                Position position = new Position(getProtocolName());
+                position.setDeviceId(deviceSession.getDeviceId());
+
+                getLastLocation(position, new Date());
+
+                String[] values = buf.toString(StandardCharsets.US_ASCII).split(",");
+                int valueIndex = 0;
+
+                if (type.equals("bphrt")) {
+                    position.set("pressureHigh", values[valueIndex++]);
+                    position.set("pressureLow", values[valueIndex++]);
+                }
+                position.set(Position.KEY_HEART_RATE, Integer.parseInt(values[valueIndex]));
+
+                return position;
+
+            }
+
+        } else if (type.equals("img")) {
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            getLastLocation(position, null);
+
+            int timeIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) ',');
+            buf.readerIndex(timeIndex + 12 + 2);
+            position.set(Position.KEY_IMAGE, Context.getMediaManager().writeFile(id, buf, "jpg"));
+
+            return position;
+
+        } else if (type.equals("TK")) {
+
+            if (buf.readableBytes() == 1) {
+                byte result = buf.readByte();
+                if (result != '1') {
+                    LOGGER.warn(type + "," + result);
+                }
+                return null;
+            }
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            getLastLocation(position, null);
+
+            position.set(Position.KEY_AUDIO, Context.getMediaManager().writeFile(id, buf, "amr"));
+
+            return position;
+
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/WatchProtocolEncoder.java b/src/main/java/org/traccar/protocol/WatchProtocolEncoder.java
new file mode 100644
index 000000000..264aec81f
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/WatchProtocolEncoder.java
@@ -0,0 +1,167 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.StringProtocolEncoder;
+import org.traccar.helper.DataConverter;
+import org.traccar.model.Command;
+
+import java.nio.charset.StandardCharsets;
+import java.text.DecimalFormat;
+import java.text.DecimalFormatSymbols;
+import java.util.HashMap;
+import java.util.Locale;
+import java.util.Map;
+import java.util.TimeZone;
+
+public class WatchProtocolEncoder extends StringProtocolEncoder implements StringProtocolEncoder.ValueFormatter {
+
+    @Override
+    public String formatValue(String key, Object value) {
+        if (key.equals(Command.KEY_TIMEZONE)) {
+            double offset = TimeZone.getTimeZone((String) value).getRawOffset() / 3600000.0;
+            DecimalFormat fmt = new DecimalFormat("+#.##;-#.##", DecimalFormatSymbols.getInstance(Locale.US));
+            return fmt.format(offset);
+        } else if (key.equals(Command.KEY_MESSAGE)) {
+            return DataConverter.printHex(value.toString().getBytes(StandardCharsets.UTF_16BE));
+        } else if (key.equals(Command.KEY_ENABLE)) {
+            return (boolean) value ? "1" : "0";
+        }
+
+        return null;
+    }
+
+    protected ByteBuf formatTextCommand(Channel channel, Command command, String format, String... keys) {
+        String content = formatCommand(command, format, this, keys);
+        ByteBuf buf = Unpooled.copiedBuffer(content, StandardCharsets.US_ASCII);
+
+        return formatBinaryCommand(channel, command, "", buf);
+    }
+
+    protected ByteBuf formatBinaryCommand(Channel channel, Command command, String textPrefix, ByteBuf data) {
+        boolean hasIndex = false;
+        String manufacturer = "CS";
+        if (channel != null) {
+            WatchProtocolDecoder decoder = channel.pipeline().get(WatchProtocolDecoder.class);
+            if (decoder != null) {
+                hasIndex = decoder.getHasIndex();
+                manufacturer = decoder.getManufacturer();
+            }
+        }
+
+        ByteBuf buf = Unpooled.buffer();
+        buf.writeByte('[');
+        buf.writeCharSequence(manufacturer, StandardCharsets.US_ASCII);
+        buf.writeByte('*');
+        buf.writeCharSequence(getUniqueId(command.getDeviceId()), StandardCharsets.US_ASCII);
+        buf.writeByte('*');
+        if (hasIndex) {
+            buf.writeCharSequence("0001", StandardCharsets.US_ASCII);
+            buf.writeByte('*');
+        }
+        buf.writeCharSequence(String.format("%04x", data.readableBytes() + textPrefix.length()),
+                StandardCharsets.US_ASCII);
+        buf.writeByte('*');
+        buf.writeCharSequence(textPrefix, StandardCharsets.US_ASCII);
+        buf.writeBytes(data);
+        buf.writeByte(']');
+
+        return buf;
+    }
+
+    private static Map<Byte, Byte> mapping = new HashMap<>();
+
+    static {
+        mapping.put((byte) 0x7d, (byte) 0x01);
+        mapping.put((byte) 0x5B, (byte) 0x02);
+        mapping.put((byte) 0x5D, (byte) 0x03);
+        mapping.put((byte) 0x2C, (byte) 0x04);
+        mapping.put((byte) 0x2A, (byte) 0x05);
+    }
+
+    private ByteBuf getBinaryData(Command command) {
+        byte[] data = DataConverter.parseHex(command.getString(Command.KEY_DATA));
+
+        int encodedLength = data.length;
+        for (byte b : data) {
+            if (mapping.containsKey(b)) {
+                encodedLength += 1;
+            }
+        }
+
+        int index = 0;
+        byte[] encodedData = new byte[encodedLength];
+
+        for (byte b : data) {
+            Byte replacement = mapping.get(b);
+            if (replacement != null) {
+                encodedData[index] = 0x7D;
+                index += 1;
+                encodedData[index] = replacement;
+            } else {
+                encodedData[index] = b;
+            }
+            index += 1;
+        }
+
+        return Unpooled.copiedBuffer(encodedData);
+    }
+
+    @Override
+    protected Object encodeCommand(Channel channel, Command command) {
+
+        switch (command.getType()) {
+            case Command.TYPE_CUSTOM:
+                return formatTextCommand(channel, command, command.getString(Command.KEY_DATA));
+            case Command.TYPE_POSITION_SINGLE:
+                return formatTextCommand(channel, command, "RG");
+            case Command.TYPE_SOS_NUMBER:
+                return formatTextCommand(channel, command, "SOS{%s},{%s}", Command.KEY_INDEX, Command.KEY_PHONE);
+            case Command.TYPE_ALARM_SOS:
+                return formatTextCommand(channel, command, "SOSSMS,{%s}", Command.KEY_ENABLE);
+            case Command.TYPE_ALARM_BATTERY:
+                return formatTextCommand(channel, command, "LOWBAT,{%s}", Command.KEY_ENABLE);
+            case Command.TYPE_REBOOT_DEVICE:
+                return formatTextCommand(channel, command, "RESET");
+            case Command.TYPE_POWER_OFF:
+                return formatTextCommand(channel, command, "POWEROFF");
+            case Command.TYPE_ALARM_REMOVE:
+                return formatTextCommand(channel, command, "REMOVE,{%s}", Command.KEY_ENABLE);
+            case Command.TYPE_SILENCE_TIME:
+                return formatTextCommand(channel, command, "SILENCETIME,{%s}", Command.KEY_DATA);
+            case Command.TYPE_ALARM_CLOCK:
+                return formatTextCommand(channel, command, "REMIND,{%s}", Command.KEY_DATA);
+            case Command.TYPE_SET_PHONEBOOK:
+                return formatTextCommand(channel, command, "PHB,{%s}", Command.KEY_DATA);
+            case Command.TYPE_MESSAGE:
+                return formatTextCommand(channel, command, "MESSAGE,{%s}", Command.KEY_MESSAGE);
+            case Command.TYPE_VOICE_MESSAGE:
+                return formatBinaryCommand(channel, command, "TK,", getBinaryData(command));
+            case Command.TYPE_POSITION_PERIODIC:
+                return formatTextCommand(channel, command, "UPLOAD,{%s}", Command.KEY_FREQUENCY);
+            case Command.TYPE_SET_TIMEZONE:
+                return formatTextCommand(channel, command, "LZ,,{%s}", Command.KEY_TIMEZONE);
+            case Command.TYPE_SET_INDICATOR:
+                return formatTextCommand(channel, command, "FLOWER,{%s}", Command.KEY_DATA);
+            default:
+                return null;
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/WialonProtocol.java b/src/main/java/org/traccar/protocol/WialonProtocol.java
new file mode 100644
index 000000000..06b54dceb
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/WialonProtocol.java
@@ -0,0 +1,54 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseProtocol;
+import org.traccar.Context;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+import org.traccar.model.Command;
+
+import io.netty.handler.codec.LineBasedFrameDecoder;
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+
+import java.nio.charset.StandardCharsets;
+public class WialonProtocol extends BaseProtocol {
+
+    public WialonProtocol() {
+        setSupportedDataCommands(
+                Command.TYPE_REBOOT_DEVICE,
+                Command.TYPE_SEND_USSD,
+                Command.TYPE_IDENTIFICATION,
+                Command.TYPE_OUTPUT_CONTROL);
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LineBasedFrameDecoder(4 * 1024));
+                pipeline.addLast(new StringEncoder());
+                boolean utf8 = Context.getConfig().getBoolean(getName() + ".utf8");
+                if (utf8) {
+                    pipeline.addLast(new StringDecoder(StandardCharsets.UTF_8));
+                } else {
+                    pipeline.addLast(new StringDecoder());
+                }
+                pipeline.addLast(new WialonProtocolEncoder());
+                pipeline.addLast(new WialonProtocolDecoder(WialonProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/WialonProtocolDecoder.java b/src/main/java/org/traccar/protocol/WialonProtocolDecoder.java
new file mode 100644
index 000000000..de7073b67
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/WialonProtocolDecoder.java
@@ -0,0 +1,196 @@
+/*
+ * Copyright 2013 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.Date;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class WialonProtocolDecoder extends BaseProtocolDecoder {
+
+    public WialonProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .number("(dd)(dd)(dd);")             // date (ddmmyy)
+            .number("(dd)(dd)(dd);")             // time (hhmmss)
+            .number("(dd)(dd.d+);")              // latitude
+            .expression("([NS]);")
+            .number("(ddd)(dd.d+);")             // longitude
+            .expression("([EW]);")
+            .number("(d+.?d*)?;")                // speed
+            .number("(d+.?d*)?;")                // course
+            .number("(?:NA|(-?d+.?d*));")        // altitude
+            .number("(?:NA|(d+))")               // satellites
+            .groupBegin().text(";")
+            .number("(?:NA|(d+.?d*));")          // hdop
+            .number("(?:NA|(d+));")              // inputs
+            .number("(?:NA|(d+));")              // outputs
+            .expression("(?:NA|([^;]*));")       // adc
+            .expression("(?:NA|([^;]*));")       // ibutton
+            .expression("(?:NA|(.*))")           // params
+            .groupEnd("?")
+            .compile();
+
+    private void sendResponse(Channel channel, SocketAddress remoteAddress, String prefix, Integer number) {
+        if (channel != null) {
+            StringBuilder response = new StringBuilder(prefix);
+            if (number != null) {
+                response.append(number);
+            }
+            response.append("\r\n");
+            channel.writeAndFlush(new NetworkMessage(response.toString(), remoteAddress));
+        }
+    }
+
+    private Position decodePosition(Channel channel, SocketAddress remoteAddress, String substring) {
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Parser parser = new Parser(PATTERN, substring);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
+
+        position.setLatitude(parser.nextCoordinate());
+        position.setLongitude(parser.nextCoordinate());
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
+        position.setCourse(parser.nextDouble(0));
+        position.setAltitude(parser.nextDouble(0));
+
+        if (parser.hasNext()) {
+            int satellites = parser.nextInt(0);
+            position.setValid(satellites >= 3);
+            position.set(Position.KEY_SATELLITES, satellites);
+        }
+
+        position.set(Position.KEY_HDOP, parser.nextDouble());
+        position.set(Position.KEY_INPUT, parser.next());
+        position.set(Position.KEY_OUTPUT, parser.next());
+
+        if (parser.hasNext()) {
+            String[] values = parser.next().split(",");
+            for (int i = 0; i < values.length; i++) {
+                position.set(Position.PREFIX_ADC + (i + 1), values[i]);
+            }
+        }
+
+        position.set(Position.KEY_DRIVER_UNIQUE_ID, parser.next());
+
+        if (parser.hasNext()) {
+            String[] values = parser.next().split(",");
+            for (String param : values) {
+                Matcher paramParser = Pattern.compile("(.*):[1-3]:(.*)").matcher(param);
+                if (paramParser.matches()) {
+                    try {
+                        position.set(paramParser.group(1).toLowerCase(), Double.parseDouble(paramParser.group(2)));
+                    } catch (NumberFormatException e) {
+                        position.set(paramParser.group(1).toLowerCase(), paramParser.group(2));
+                    }
+                }
+            }
+        }
+
+        return position;
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        String sentence = (String) msg;
+
+        if (sentence.startsWith("#L#")) {
+
+            String[] values = sentence.substring(3).split(";");
+
+            String imei = values[0].indexOf('.') >= 0 ? values[1] : values[0];
+            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
+            if (deviceSession != null) {
+                sendResponse(channel, remoteAddress, "#AL#", 1);
+            }
+
+        } else if (sentence.startsWith("#P#")) {
+
+            sendResponse(channel, remoteAddress, "#AP#", null); // heartbeat
+
+        } else if (sentence.startsWith("#SD#") || sentence.startsWith("#D#")) {
+
+            Position position = decodePosition(
+                    channel, remoteAddress, sentence.substring(sentence.indexOf('#', 1) + 1));
+
+            if (position != null) {
+                sendResponse(channel, remoteAddress, "#AD#", 1);
+                return position;
+            }
+
+        } else if (sentence.startsWith("#B#")) {
+
+            String[] messages = sentence.substring(sentence.indexOf('#', 1) + 1).split("\\|");
+            List<Position> positions = new LinkedList<>();
+
+            for (String message : messages) {
+                Position position = decodePosition(channel, remoteAddress, message);
+                if (position != null) {
+                    position.set(Position.KEY_ARCHIVE, true);
+                    positions.add(position);
+                }
+            }
+
+            sendResponse(channel, remoteAddress, "#AB#", messages.length);
+            if (!positions.isEmpty()) {
+                return positions;
+            }
+
+        } else if (sentence.startsWith("#M#")) {
+            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+            if (deviceSession != null) {
+                Position position = new Position(getProtocolName());
+                position.setDeviceId(deviceSession.getDeviceId());
+                getLastLocation(position, new Date());
+                position.setValid(false);
+                position.set(Position.KEY_RESULT, sentence.substring(sentence.indexOf('#', 1) + 1));
+                sendResponse(channel, remoteAddress, "#AM#", 1);
+                return position;
+            }
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/WialonProtocolEncoder.java b/src/main/java/org/traccar/protocol/WialonProtocolEncoder.java
new file mode 100644
index 000000000..9ff1631eb
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/WialonProtocolEncoder.java
@@ -0,0 +1,40 @@
+/*
+ * Copyright 2016 Anton Tananaev (anton@traccar.org)
+ * Copyright 2016 Andrey Kunitsyn (andrey@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.StringProtocolEncoder;
+import org.traccar.model.Command;
+
+public class WialonProtocolEncoder extends StringProtocolEncoder {
+
+    @Override
+    protected Object encodeCommand(Command command) {
+        switch (command.getType()) {
+            case Command.TYPE_REBOOT_DEVICE:
+                return formatCommand(command, "reboot\r\n");
+            case Command.TYPE_SEND_USSD:
+                return formatCommand(command, "USSD:{%s}\r\n", Command.KEY_PHONE);
+            case Command.TYPE_IDENTIFICATION:
+                return formatCommand(command, "VER?\r\n");
+            case Command.TYPE_OUTPUT_CONTROL:
+                return formatCommand(command, "L{%s}={%s}\r\n", Command.KEY_INDEX, Command.KEY_DATA);
+            default:
+                return null;
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/WondexFrameDecoder.java b/src/main/java/org/traccar/protocol/WondexFrameDecoder.java
new file mode 100644
index 000000000..39d83d761
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/WondexFrameDecoder.java
@@ -0,0 +1,62 @@
+/*
+ * Copyright 2013 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseFrameDecoder;
+import org.traccar.NetworkMessage;
+import org.traccar.helper.BufferUtil;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+
+public class WondexFrameDecoder extends BaseFrameDecoder {
+
+    private static final int KEEP_ALIVE_LENGTH = 8;
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+        if (buf.readableBytes() < KEEP_ALIVE_LENGTH) {
+            return null;
+        }
+
+        if (buf.getUnsignedByte(buf.readerIndex()) == 0xD0) {
+
+            // Send response
+            ByteBuf frame = buf.readRetainedSlice(KEEP_ALIVE_LENGTH);
+            if (channel != null) {
+                frame.retain();
+                channel.writeAndFlush(new NetworkMessage(frame, channel.remoteAddress()));
+            }
+            return frame;
+
+        } else {
+
+            int index = BufferUtil.indexOf("\r\n", buf);
+            if (index != -1) {
+                ByteBuf frame = buf.readRetainedSlice(index - buf.readerIndex());
+                buf.skipBytes(2);
+                return frame;
+            }
+
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/WondexProtocol.java b/src/main/java/org/traccar/protocol/WondexProtocol.java
new file mode 100644
index 000000000..8c6283d66
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/WondexProtocol.java
@@ -0,0 +1,55 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+import org.traccar.model.Command;
+
+import io.netty.handler.codec.string.StringEncoder;
+
+public class WondexProtocol extends BaseProtocol {
+
+    public WondexProtocol() {
+        setTextCommandEncoder(new WondexProtocolEncoder());
+        setSupportedCommands(
+                Command.TYPE_GET_DEVICE_STATUS,
+                Command.TYPE_GET_MODEM_STATUS,
+                Command.TYPE_REBOOT_DEVICE,
+                Command.TYPE_POSITION_SINGLE,
+                Command.TYPE_GET_VERSION,
+                Command.TYPE_IDENTIFICATION);
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new WondexFrameDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new WondexProtocolEncoder());
+                pipeline.addLast(new WondexProtocolDecoder(WondexProtocol.this));
+            }
+        });
+        addServer(new TrackerServer(true, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new WondexProtocolEncoder());
+                pipeline.addLast(new WondexProtocolDecoder(WondexProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/WondexProtocolDecoder.java b/src/main/java/org/traccar/protocol/WondexProtocolDecoder.java
new file mode 100644
index 000000000..b85ae2656
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/WondexProtocolDecoder.java
@@ -0,0 +1,128 @@
+/*
+ * Copyright 2013 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.Date;
+import java.util.regex.Pattern;
+
+public class WondexProtocolDecoder extends BaseProtocolDecoder {
+
+    public WondexProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .number("[^d]*")                     // header
+            .number("(d+),")                     // device identifier
+            .number("(dddd)(dd)(dd)")            // date (yyyymmdd)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .number("(-?d+.d+),")                // longitude
+            .number("(-?d+.d+),")                // latitude
+            .number("(d+),")                     // speed
+            .number("(d+),")                     // course
+            .number("(-?d+.?d*),")               // altitude
+            .number("(d+),")                     // satellites
+            .number("(d+),?")                    // event
+            .number("(d+.d+)V,").optional()      // battery
+            .number("(d+.d+)?,?")                // odometer
+            .number("(d+)?,?")                   // input
+            .number("(d+.d+)?,?")                // adc1
+            .number("(d+.d+)?,?")                // adc2
+            .number("(d+)?")                     // output
+            .any()
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        if (buf.getUnsignedByte(0) == 0xD0) {
+
+            long deviceId = ((Long.reverseBytes(buf.getLong(0))) >> 32) & 0xFFFFFFFFL;
+            getDeviceSession(channel, remoteAddress, String.valueOf(deviceId));
+
+            return null;
+        } else if (buf.toString(StandardCharsets.US_ASCII).startsWith("$OK:")
+                || buf.toString(StandardCharsets.US_ASCII).startsWith("$ERR:")
+                || buf.toString(StandardCharsets.US_ASCII).startsWith("$MSG:")) {
+
+            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+            getLastLocation(position, new Date());
+            position.set(Position.KEY_RESULT, buf.toString(StandardCharsets.US_ASCII));
+
+            return position;
+
+        } else {
+
+            Parser parser = new Parser(PATTERN, buf.toString(StandardCharsets.US_ASCII));
+            if (!parser.matches()) {
+                return null;
+            }
+
+            Position position = new Position(getProtocolName());
+
+            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+            if (deviceSession == null) {
+                return null;
+            }
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            position.setTime(parser.nextDateTime());
+
+            position.setLongitude(parser.nextDouble(0));
+            position.setLatitude(parser.nextDouble(0));
+            position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
+            position.setCourse(parser.nextDouble(0));
+            position.setAltitude(parser.nextDouble(0));
+
+            int satellites = parser.nextInt(0);
+            position.setValid(satellites != 0);
+            position.set(Position.KEY_SATELLITES, satellites);
+
+            position.set(Position.KEY_EVENT, parser.next());
+            position.set(Position.KEY_BATTERY, parser.nextDouble());
+            if (parser.hasNext()) {
+                position.set(Position.KEY_ODOMETER, parser.nextDouble(0) * 1000);
+            }
+            position.set(Position.KEY_INPUT, parser.next());
+            position.set(Position.PREFIX_ADC + 1, parser.next());
+            position.set(Position.PREFIX_ADC + 2, parser.next());
+            position.set(Position.KEY_OUTPUT, parser.next());
+
+            return position;
+
+        }
+
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/WondexProtocolEncoder.java b/src/main/java/org/traccar/protocol/WondexProtocolEncoder.java
new file mode 100644
index 000000000..f9e8eeb9b
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/WondexProtocolEncoder.java
@@ -0,0 +1,46 @@
+/*
+ * Copyright 2016 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.StringProtocolEncoder;
+import org.traccar.model.Command;
+
+public class WondexProtocolEncoder extends StringProtocolEncoder {
+
+    @Override
+    protected Object encodeCommand(Command command) {
+
+        initDevicePassword(command, "0000");
+
+        switch (command.getType()) {
+            case Command.TYPE_REBOOT_DEVICE:
+                return formatCommand(command, "$WP+REBOOT={%s}", Command.KEY_DEVICE_PASSWORD);
+            case Command.TYPE_GET_DEVICE_STATUS:
+                return formatCommand(command, "$WP+TEST={%s}", Command.KEY_DEVICE_PASSWORD);
+            case Command.TYPE_GET_MODEM_STATUS:
+                return formatCommand(command, "$WP+GSMINFO={%s}", Command.KEY_DEVICE_PASSWORD);
+            case Command.TYPE_IDENTIFICATION:
+                return formatCommand(command, "$WP+IMEI={%s}", Command.KEY_DEVICE_PASSWORD);
+            case Command.TYPE_POSITION_SINGLE:
+                return formatCommand(command, "$WP+GETLOCATION={%s}", Command.KEY_DEVICE_PASSWORD);
+            case Command.TYPE_GET_VERSION:
+                return formatCommand(command, "$WP+VER={%s}", Command.KEY_DEVICE_PASSWORD);
+            default:
+                return null;
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/WristbandProtocol.java b/src/main/java/org/traccar/protocol/WristbandProtocol.java
new file mode 100644
index 000000000..1e5ef2c01
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/WristbandProtocol.java
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LengthFieldBasedFrameDecoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class WristbandProtocol extends BaseProtocol {
+
+    public WristbandProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LengthFieldBasedFrameDecoder(1024, 3, 2, 3, 0));
+                pipeline.addLast(new WristbandProtocolDecoder(WristbandProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/WristbandProtocolDecoder.java b/src/main/java/org/traccar/protocol/WristbandProtocolDecoder.java
new file mode 100644
index 000000000..7f2b0af85
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/WristbandProtocolDecoder.java
@@ -0,0 +1,207 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.CellTower;
+import org.traccar.model.Network;
+import org.traccar.model.Position;
+import org.traccar.model.WifiAccessPoint;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.regex.Pattern;
+
+public class WristbandProtocolDecoder extends BaseProtocolDecoder {
+
+    public WristbandProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private void sendResponse(
+            Channel channel, String imei, String version, int type, String data) {
+
+        if (channel != null) {
+            String sentence = String.format("YX%s|%s|0|{F%02d#%s}\r\n", imei, version, type, data);
+            ByteBuf response = Unpooled.buffer();
+            if (type != 91) {
+                response.writeBytes(new byte[]{0x00, 0x01, 0x02});
+                response.writeShort(sentence.length());
+            }
+            response.writeCharSequence(sentence, StandardCharsets.US_ASCII);
+            if (type != 91) {
+                response.writeBytes(new byte[]{(byte) 0xFF, (byte) 0xFE, (byte) 0xFC});
+            }
+            channel.writeAndFlush(new NetworkMessage(response, channel.remoteAddress()));
+        }
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .expression("..")                    // header
+            .number("(d+)|")                     // imei
+            .number("([vV]d+.d+)|")              // version
+            .number("d+|")                       // model
+            .text("{")
+            .number("F(d+)")                     // function
+            .groupBegin()
+            .text("#")
+            .expression("(.*)")                  // data
+            .groupEnd("?")
+            .text("}")
+            .text("\r\n")
+            .compile();
+
+    private Position decodePosition(DeviceSession deviceSession, String sentence) throws ParseException {
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        String[] values = sentence.split(",");
+
+        position.setValid(true);
+        position.setLongitude(Double.parseDouble(values[0]));
+        position.setLatitude(Double.parseDouble(values[1]));
+        position.setTime(new SimpleDateFormat("yyyyMMddHHmm").parse(values[2]));
+        position.setSpeed(UnitsConverter.knotsFromKph(Double.parseDouble(values[3])));
+
+        return position;
+    }
+
+    private Position decodeStatus(DeviceSession deviceSession, String sentence) {
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        getLastLocation(position, null);
+
+        position.set(Position.KEY_BATTERY_LEVEL, Integer.parseInt(sentence.split(",")[0]));
+
+        return position;
+    }
+
+    private Position decodeNetwork(DeviceSession deviceSession, String sentence, boolean wifi) {
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        getLastLocation(position, null);
+
+        Network network = new Network();
+        String[] fragments = sentence.split("\\|");
+
+        if (wifi) {
+            for (String item : fragments[0].split("_")) {
+                String[] values = item.split(",");
+                network.addWifiAccessPoint(WifiAccessPoint.from(values[0], Integer.parseInt(values[1])));
+            }
+        }
+
+        for (String item : fragments[wifi ? 1 : 0].split(":")) {
+            String[] values = item.split(",");
+            int lac = Integer.parseInt(values[0]);
+            int mnc = Integer.parseInt(values[1]);
+            int mcc = Integer.parseInt(values[2]);
+            int cid = Integer.parseInt(values[3]);
+            int rssi = Integer.parseInt(values[4]);
+            network.addCellTower(CellTower.from(mcc, mnc, lac, cid, rssi));
+        }
+
+        position.setNetwork(network);
+
+        return position;
+    }
+
+    private List<Position> decodeMessage(
+            Channel channel, SocketAddress remoteAddress, String sentence) throws ParseException {
+
+        Parser parser = new Parser(PATTERN, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        String imei = parser.next();
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        String version = parser.next();
+        int type = parser.nextInt();
+
+        List<Position> positions = new LinkedList<>();
+        String data = parser.next();
+
+        switch (type) {
+            case 90:
+                sendResponse(channel, imei, version, type, getServer(channel, ','));
+                break;
+            case 91:
+                String time = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss").format(new Date());
+                sendResponse(channel, imei, version, type, time + "|" + getServer(channel, ','));
+                break;
+            case 1:
+                positions.add(decodeStatus(deviceSession, data));
+                sendResponse(channel, imei, version, type, data.split(",")[1]);
+                break;
+            case 2:
+                for (String fragment : data.split("\\|")) {
+                    positions.add(decodePosition(deviceSession, fragment));
+                }
+                break;
+            case 3:
+            case 4:
+                positions.add(decodeNetwork(deviceSession, data, type == 3));
+                break;
+            case 64:
+                sendResponse(channel, imei, version, type, data);
+                break;
+            default:
+                break;
+        }
+
+        return positions.isEmpty() ? null : positions;
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+        buf.skipBytes(3); // header
+        buf.readUnsignedShort(); // length
+
+        String sentence = buf.toString(buf.readerIndex(), buf.readableBytes() - 3, StandardCharsets.US_ASCII);
+
+        buf.skipBytes(3); // footer
+
+        return decodeMessage(channel, remoteAddress, sentence);
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/XexunFrameDecoder.java b/src/main/java/org/traccar/protocol/XexunFrameDecoder.java
new file mode 100644
index 000000000..114e94061
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/XexunFrameDecoder.java
@@ -0,0 +1,58 @@
+/*
+ * Copyright 2012 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseFrameDecoder;
+import org.traccar.helper.BufferUtil;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+
+public class XexunFrameDecoder extends BaseFrameDecoder {
+
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {
+
+        if (buf.readableBytes() < 80) {
+            return null;
+        }
+
+        int beginIndex = BufferUtil.indexOf("GPRMC", buf);
+        if (beginIndex == -1) {
+            beginIndex = BufferUtil.indexOf("GNRMC", buf);
+            if (beginIndex == -1) {
+                return null;
+            }
+        }
+
+        int identifierIndex = BufferUtil.indexOf("imei:", buf, beginIndex, buf.writerIndex());
+        if (identifierIndex == -1) {
+            return null;
+        }
+
+        int endIndex = buf.indexOf(identifierIndex, buf.writerIndex(), (byte) ',');
+        if (endIndex == -1) {
+            return null;
+        }
+
+        buf.skipBytes(beginIndex - buf.readerIndex());
+
+        return buf.readRetainedSlice(endIndex - beginIndex + 1);
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/XexunProtocol.java b/src/main/java/org/traccar/protocol/XexunProtocol.java
new file mode 100644
index 000000000..0005270fb
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/XexunProtocol.java
@@ -0,0 +1,51 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseProtocol;
+import org.traccar.Context;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+import org.traccar.model.Command;
+
+import io.netty.handler.codec.LineBasedFrameDecoder;
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+
+public class XexunProtocol extends BaseProtocol {
+
+    public XexunProtocol() {
+        setSupportedDataCommands(
+                Command.TYPE_ENGINE_STOP,
+                Command.TYPE_ENGINE_RESUME);
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                boolean full = Context.getConfig().getBoolean(getName() + ".extended");
+                if (full) {
+                    pipeline.addLast(new LineBasedFrameDecoder(1024)); // tracker bug \n\r
+                } else {
+                    pipeline.addLast(new XexunFrameDecoder());
+                }
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new XexunProtocolEncoder());
+                pipeline.addLast(new XexunProtocolDecoder(XexunProtocol.this, full));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/XexunProtocolDecoder.java b/src/main/java/org/traccar/protocol/XexunProtocolDecoder.java
new file mode 100644
index 000000000..5e2d0c05e
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/XexunProtocolDecoder.java
@@ -0,0 +1,152 @@
+/*
+ * Copyright 2012 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class XexunProtocolDecoder extends BaseProtocolDecoder {
+
+    private final boolean full;
+
+    public XexunProtocolDecoder(Protocol protocol, boolean full) {
+        super(protocol);
+        this.full = full;
+    }
+
+    private static final Pattern PATTERN_BASIC = new PatternBuilder()
+            .expression("G[PN]RMC,")
+            .number("(?:(dd)(dd)(dd))?.?d*,")    // time (hhmmss)
+            .expression("([AV]),")               // validity
+            .number("(d*?)(d?d.d+),([NS]),")     // latitude
+            .number("(d*?)(d?d.d+),([EW])?,")    // longitude
+            .number("(d+.?d*),")                 // speed
+            .number("(d+.?d*)?,")                // course
+            .number("(?:(dd)(dd)(dd))?,")        // date (ddmmyy)
+            .expression("[^*]*").text("*")
+            .number("xx")                        // checksum
+            .expression("\\r\\n").optional()
+            .expression(",([FL]),")              // signal
+            .expression("([^,]*),").optional()   // alarm
+            .any()
+            .number("imei:(d+),")                // imei
+            .compile();
+
+    private static final Pattern PATTERN_FULL = new PatternBuilder()
+            .any()
+            .number("(d+),")                     // serial
+            .expression("([^,]+)?,")             // phone number
+            .expression(PATTERN_BASIC.pattern())
+            .number("(d+),")                     // satellites
+            .number("(-?d+.d+)?,")               // altitude
+            .number("[FL]:(d+.d+)V")             // power
+            .any()
+            .compile();
+
+    private String decodeStatus(Position position, String value) {
+        if (value != null) {
+            switch (value.toLowerCase()) {
+                case "acc on":
+                case "accstart":
+                    position.set(Position.KEY_IGNITION, true);
+                    break;
+                case "acc off":
+                case "accstop":
+                    position.set(Position.KEY_IGNITION, false);
+                    break;
+                case "help me!":
+                    position.set(Position.KEY_ALARM, Position.ALARM_SOS);
+                    break;
+                case "low battery":
+                    position.set(Position.KEY_ALARM, Position.ALARM_LOW_BATTERY);
+                    break;
+                case "move!":
+                case "moved!":
+                    position.set(Position.KEY_ALARM, Position.ALARM_MOVEMENT);
+                    break;
+                default:
+                    break;
+            }
+        }
+        return null;
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Pattern pattern = PATTERN_BASIC;
+        if (full) {
+            pattern = PATTERN_FULL;
+        }
+
+        Parser parser = new Parser(pattern, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+
+        if (full) {
+            position.set("serial", parser.next());
+            position.set("number", parser.next());
+        }
+
+        DateBuilder dateBuilder = new DateBuilder()
+                .setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+
+        position.setValid(parser.next().equals("A"));
+        position.setLatitude(parser.nextCoordinate());
+        position.setLongitude(parser.nextCoordinate());
+
+        position.setSpeed(convertSpeed(parser.nextDouble(0), "kn"));
+
+        position.setCourse(parser.nextDouble(0));
+
+        dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
+        position.setTime(dateBuilder.getDate());
+
+        position.set("signal", parser.next());
+
+        decodeStatus(position, parser.next());
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        if (full) {
+            position.set(Position.KEY_SATELLITES, parser.nextInt());
+
+            position.setAltitude(parser.nextDouble(0));
+
+            position.set(Position.KEY_POWER, parser.nextDouble(0));
+        }
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/XexunProtocolEncoder.java b/src/main/java/org/traccar/protocol/XexunProtocolEncoder.java
new file mode 100644
index 000000000..515cfbbd0
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/XexunProtocolEncoder.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2016 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.StringProtocolEncoder;
+import org.traccar.model.Command;
+
+public class XexunProtocolEncoder extends StringProtocolEncoder {
+
+    @Override
+    protected Object encodeCommand(Command command) {
+
+        initDevicePassword(command, "123456");
+
+        switch (command.getType()) {
+            case Command.TYPE_ENGINE_STOP:
+                return formatCommand(command, "powercar{%s} 11", Command.KEY_DEVICE_PASSWORD);
+            case Command.TYPE_ENGINE_RESUME:
+                return formatCommand(command, "powercar{%s} 00", Command.KEY_DEVICE_PASSWORD);
+            default:
+                return null;
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/XirgoProtocol.java b/src/main/java/org/traccar/protocol/XirgoProtocol.java
new file mode 100644
index 000000000..4979fda5d
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/XirgoProtocol.java
@@ -0,0 +1,53 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseProtocol;
+import org.traccar.CharacterDelimiterFrameDecoder;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+import org.traccar.model.Command;
+
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+
+public class XirgoProtocol extends BaseProtocol {
+
+    public XirgoProtocol() {
+        setSupportedDataCommands(
+                Command.TYPE_OUTPUT_CONTROL);
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, "##"));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new XirgoProtocolEncoder());
+                pipeline.addLast(new XirgoProtocolDecoder(XirgoProtocol.this));
+            }
+        });
+        addServer(new TrackerServer(true, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new XirgoProtocolEncoder());
+                pipeline.addLast(new XirgoProtocolDecoder(XirgoProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/XirgoProtocolDecoder.java b/src/main/java/org/traccar/protocol/XirgoProtocolDecoder.java
new file mode 100644
index 000000000..6d215e672
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/XirgoProtocolDecoder.java
@@ -0,0 +1,355 @@
+/*
+ * Copyright 2015 - 2019 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.Context;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class XirgoProtocolDecoder extends BaseProtocolDecoder {
+
+    private Boolean newFormat;
+    private String form;
+
+    public XirgoProtocolDecoder(Protocol protocol) {
+        super(protocol);
+        form = Context.getConfig().getString(getProtocolName() + ".form");
+    }
+
+    public void setForm(String form) {
+        this.form = form;
+    }
+
+    private static final Pattern PATTERN_OLD = new PatternBuilder()
+            .text("$$")
+            .number("(d+),")                     // imei
+            .number("(d+),")                     // event
+            .number("(dddd)/(dd)/(dd),")         // date (yyyy/mm/dd)
+            .number("(dd):(dd):(dd),")           // time (hh:mm:ss)
+            .number("(-?d+.?d*),")               // latitude
+            .number("(-?d+.?d*),")               // longitude
+            .number("(-?d+.?d*),")               // altitude
+            .number("(d+.?d*),")                 // speed
+            .number("(d+.?d*),")                 // course
+            .number("(d+),")                     // satellites
+            .number("(d+.?d*),")                 // hdop
+            .number("(d+.d+),")                  // battery
+            .number("(d+),")                     // gsm
+            .number("(d+.?d*),")                 // odometer
+            .number("(d+),")                     // gps
+            .any()
+            .compile();
+
+    private static final Pattern PATTERN_NEW = new PatternBuilder()
+            .text("$$")
+            .number("(d+),")                     // imei
+            .number("(d+),")                     // event
+            .number("(dddd)/(dd)/(dd),")         // date (yyyy/mm/dd)
+            .number("(dd):(dd):(dd),")           // time (hh:mm:ss)
+            .number("(-?d+.?d*),")               // latitude
+            .number("(-?d+.?d*),")               // longitude
+            .number("(-?d+.?d*),")               // altitude
+            .number("(d+.?d*),")                 // speed
+            .number("d+.?d*,")                   // acceleration
+            .number("d+.?d*,")                   // deceleration
+            .number("d+,")
+            .number("(d+.?d*),")                 // course
+            .number("(d+),")                     // satellites
+            .number("(d+.?d*),")                 // hdop
+            .number("(d+.?d*),")                 // odometer
+            .number("(d+.?d*),")                 // fuel consumption
+            .number("(d+.d+),")                  // battery
+            .number("(d+),")                     // gsm
+            .number("(d+),")                     // gps
+            .groupBegin()
+            .number("d,")                        // reset mode
+            .expression("([01])")                // input 1
+            .expression("([01])")                // input 1
+            .expression("([01])")                // input 1
+            .expression("([01]),")               // output 1
+            .number("(d+.?d*),")                 // adc 1
+            .number("(d+.?d*),")                 // fuel level
+            .number("d+,")                       // engine load
+            .number("(d+),")                     // engine hours
+            .number("(d+),")                     // oil pressure
+            .number("(d+),")                     // oil level
+            .number("(-?d+),")                   // oil temperature
+            .number("(d+),")                     // coolant pressure
+            .number("(d+),")                     // coolant level
+            .number("(-?d+)")                    // coolant temperature
+            .groupEnd("?")
+            .any()
+            .compile();
+
+    private void decodeEvent(Position position, int event) {
+
+        position.set(Position.KEY_EVENT, event);
+
+        switch (event) {
+            case 4001:
+            case 4003:
+            case 6011:
+            case 6013:
+                position.set(Position.KEY_IGNITION, true);
+                break;
+            case 4002:
+            case 4004:
+            case 6012:
+            case 6014:
+                position.set(Position.KEY_IGNITION, false);
+                break;
+            case 4005:
+                position.set(Position.KEY_CHARGE, false);
+                break;
+            case 6002:
+                position.set(Position.KEY_ALARM, Position.ALARM_OVERSPEED);
+                break;
+            case 6006:
+                position.set(Position.KEY_ALARM, Position.ALARM_ACCELERATION);
+                break;
+            case 6007:
+                position.set(Position.KEY_ALARM, Position.ALARM_BRAKING);
+                break;
+            case 6008:
+                position.set(Position.KEY_ALARM, Position.ALARM_LOW_POWER);
+                break;
+            case 6009:
+                position.set(Position.KEY_ALARM, Position.ALARM_POWER_CUT);
+                break;
+            case 6010:
+                position.set(Position.KEY_ALARM, Position.ALARM_POWER_RESTORED);
+                break;
+            case 6016:
+                position.set(Position.KEY_ALARM, Position.ALARM_IDLE);
+                break;
+            case 6017:
+                position.set(Position.KEY_ALARM, Position.ALARM_TOW);
+                break;
+            case 6030:
+            case 6071:
+                position.set(Position.KEY_MOTION, true);
+                break;
+            case 6031:
+                position.set(Position.KEY_MOTION, false);
+                break;
+            case 6032:
+                position.set(Position.KEY_ALARM, Position.ALARM_PARKING);
+                break;
+            case 6090:
+                position.set(Position.KEY_ALARM, Position.ALARM_REMOVING);
+                break;
+            case 6091:
+                position.set(Position.KEY_ALARM, Position.ALARM_LOW_BATTERY);
+                break;
+            default:
+                break;
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        String sentence = (String) msg;
+        if (form != null) {
+            return decodeCustom(channel, remoteAddress, sentence);
+        } else {
+            return decodeFixed(channel, remoteAddress, sentence);
+        }
+    }
+
+
+    private Object decodeCustom(
+            Channel channel, SocketAddress remoteAddress, String sentence) {
+
+        String[] keys = form.split(",");
+        String[] values = sentence.replace("$$", "").replace("##", "").split(",");
+
+        Position position = new Position(getProtocolName());
+        DateBuilder dateBuilder = new DateBuilder();
+
+        for (int i = 0; i < Math.min(keys.length, values.length); i++) {
+            switch (keys[i]) {
+                case "UID":
+                case "IM":
+                    DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, values[i]);
+                    if (deviceSession != null) {
+                        position.setDeviceId(deviceSession.getDeviceId());
+                    }
+                    break;
+                case "EV":
+                    decodeEvent(position, Integer.parseInt(values[i]));
+                    break;
+                case "D":
+                    String[] date = values[i].split("/");
+                    dateBuilder.setMonth(Integer.parseInt(date[0]));
+                    dateBuilder.setDay(Integer.parseInt(date[1]));
+                    dateBuilder.setYear(Integer.parseInt(date[2]));
+                    break;
+                case "T":
+                    String[] time = values[i].split(":");
+                    dateBuilder.setHour(Integer.parseInt(time[0]));
+                    dateBuilder.setMinute(Integer.parseInt(time[1]));
+                    dateBuilder.setSecond(Integer.parseInt(time[2]));
+                    break;
+                case "LT":
+                    position.setLatitude(Double.parseDouble(values[i]));
+                    break;
+                case "LN":
+                    position.setLongitude(Double.parseDouble(values[i]));
+                    break;
+                case "AL":
+                    position.setAltitude(Integer.parseInt(values[i]));
+                    break;
+                case "GSPT":
+                    position.setSpeed(UnitsConverter.knotsFromKph(Double.parseDouble(values[i])));
+                    break;
+                case "HD":
+                    if (values[i].contains(".")) {
+                        position.setCourse(Double.parseDouble(values[i]));
+                    } else {
+                        position.setCourse(Integer.parseInt(values[i]) * 0.1);
+                    }
+                    break;
+                case "SV":
+                    position.set(Position.KEY_SATELLITES, Integer.parseInt(values[i]));
+                    break;
+                case "BV":
+                    position.set(Position.KEY_BATTERY, Double.parseDouble(values[i]));
+                    break;
+                case "CQ":
+                    position.set(Position.KEY_RSSI, Integer.parseInt(values[i]));
+                    break;
+                case "MI":
+                    position.set(Position.KEY_ODOMETER, Integer.parseInt(values[i]));
+                    break;
+                case "GS":
+                    position.setValid(Integer.parseInt(values[i]) == 3);
+                    break;
+                case "SI":
+                    position.set("iccid", values[i]);
+                    break;
+                case "IG":
+                    int ignition = Integer.parseInt(values[i]);
+                    if (ignition > 0) {
+                        position.set(Position.KEY_IGNITION, ignition == 1);
+                    }
+                    break;
+                case "OT":
+                    position.set(Position.KEY_OUTPUT, Integer.parseInt(values[i]));
+                    break;
+                default:
+                    break;
+            }
+        }
+
+        position.setTime(dateBuilder.getDate());
+
+        return position.getDeviceId() > 0 ? position : null;
+    }
+
+    private Object decodeFixed(
+            Channel channel, SocketAddress remoteAddress, String sentence) {
+
+        Parser parser;
+        if (newFormat == null) {
+            parser = new Parser(PATTERN_NEW, sentence);
+            if (parser.matches()) {
+                newFormat = true;
+            } else {
+                parser = new Parser(PATTERN_OLD, sentence);
+                if (parser.matches()) {
+                    newFormat = false;
+                } else {
+                    return null;
+                }
+            }
+        } else {
+            if (newFormat) {
+                parser = new Parser(PATTERN_NEW, sentence);
+            } else {
+                parser = new Parser(PATTERN_OLD, sentence);
+            }
+            if (!parser.matches()) {
+                return null;
+            }
+        }
+
+        Position position = new Position(getProtocolName());
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        decodeEvent(position, parser.nextInt());
+
+        position.setTime(parser.nextDateTime());
+
+        position.setLatitude(parser.nextDouble(0));
+        position.setLongitude(parser.nextDouble(0));
+        position.setAltitude(parser.nextDouble(0));
+        position.setSpeed(UnitsConverter.knotsFromMph(parser.nextDouble(0)));
+        position.setCourse(parser.nextDouble(0));
+
+        position.set(Position.KEY_SATELLITES, parser.nextInt());
+        position.set(Position.KEY_HDOP, parser.nextDouble());
+
+        if (newFormat) {
+            position.set(Position.KEY_ODOMETER, UnitsConverter.metersFromMiles(parser.nextDouble(0)));
+            position.set(Position.KEY_FUEL_CONSUMPTION, parser.next());
+        }
+
+        position.set(Position.KEY_BATTERY, parser.nextDouble(0));
+        position.set(Position.KEY_RSSI, parser.nextDouble());
+
+        if (!newFormat) {
+            position.set(Position.KEY_ODOMETER, UnitsConverter.metersFromMiles(parser.nextDouble(0)));
+        }
+
+        position.setValid(parser.nextInt(0) == 1);
+
+        if (newFormat && parser.hasNext(13)) {
+            position.set(Position.PREFIX_IN + 1, parser.nextInt());
+            position.set(Position.PREFIX_IN + 2, parser.nextInt());
+            position.set(Position.PREFIX_IN + 3, parser.nextInt());
+            position.set(Position.PREFIX_OUT + 1, parser.nextInt());
+            position.set(Position.PREFIX_ADC + 1, parser.nextDouble());
+            position.set(Position.KEY_FUEL_LEVEL, parser.nextDouble());
+            position.set(Position.KEY_HOURS, UnitsConverter.msFromHours(parser.nextInt()));
+            position.set("oilPressure", parser.nextInt());
+            position.set("oilLevel", parser.nextInt());
+            position.set("oilTemp", parser.nextInt());
+            position.set("coolantPressure", parser.nextInt());
+            position.set("coolantLevel", parser.nextInt());
+            position.set("coolantTemp", parser.nextInt());
+        }
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/XirgoProtocolEncoder.java b/src/main/java/org/traccar/protocol/XirgoProtocolEncoder.java
new file mode 100644
index 000000000..dd5e30cca
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/XirgoProtocolEncoder.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2017 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.StringProtocolEncoder;
+import org.traccar.model.Command;
+
+public class XirgoProtocolEncoder extends StringProtocolEncoder {
+
+    @Override
+    protected Object encodeCommand(Command command) {
+
+        switch (command.getType()) {
+            case Command.TYPE_OUTPUT_CONTROL:
+                return String.format("+XT:7005,%d,1", command.getInteger(Command.KEY_DATA) + 1);
+            default:
+                return null;
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Xrb28Protocol.java b/src/main/java/org/traccar/protocol/Xrb28Protocol.java
new file mode 100644
index 000000000..b1f1c34fb
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Xrb28Protocol.java
@@ -0,0 +1,49 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LineBasedFrameDecoder;
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+import org.traccar.model.Command;
+
+import java.nio.charset.StandardCharsets;
+
+public class Xrb28Protocol extends BaseProtocol {
+
+    public Xrb28Protocol() {
+        setSupportedDataCommands(
+                Command.TYPE_CUSTOM,
+                Command.TYPE_POSITION_SINGLE,
+                Command.TYPE_POSITION_PERIODIC,
+                Command.TYPE_ALARM_ARM,
+                Command.TYPE_ALARM_DISARM);
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LineBasedFrameDecoder(1024));
+                pipeline.addLast(new StringEncoder(StandardCharsets.ISO_8859_1));
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new Xrb28ProtocolEncoder());
+                pipeline.addLast(new Xrb28ProtocolDecoder(Xrb28Protocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Xrb28ProtocolDecoder.java b/src/main/java/org/traccar/protocol/Xrb28ProtocolDecoder.java
new file mode 100644
index 000000000..938394d6b
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Xrb28ProtocolDecoder.java
@@ -0,0 +1,187 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.DateBuilder;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Command;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class Xrb28ProtocolDecoder extends BaseProtocolDecoder {
+
+    private String pendingCommand;
+
+    public void setPendingCommand(String pendingCommand) {
+        this.pendingCommand = pendingCommand;
+    }
+
+    public Xrb28ProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("*")
+            .expression("....,")
+            .expression("..,")                   // vendor
+            .number("d{15},")                    // imei
+            .expression("..,")                   // type
+            .number("0,")                        // reserved
+            .number("(dd)(dd)(dd).d+,")          // time (hhmmss)
+            .expression("([AV]),")               // validity
+            .number("(dd)(dd.d+),")              // latitude
+            .expression("([NS]),")
+            .number("(d{2,3})(dd.d+),")          // longitude
+            .expression("([EW]),")
+            .number("(d+),")                     // satellites
+            .number("(d+.d+),")                  // hdop
+            .number("(dd)(dd)(dd),")             // date (ddmmyy)
+            .number("(-?d+.?d*),")               // altitude
+            .expression(".,")                    // height unit
+            .expression(".#")                    // mode
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        String sentence = (String) msg;
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, sentence.substring(9, 24));
+        if (deviceSession == null) {
+            return null;
+        }
+
+        String type = sentence.substring(25, 27);
+        if (channel != null) {
+            if (type.matches("L0|L1|W0|E1")) {
+                channel.write(new NetworkMessage(
+                        "\u00ff\u00ff*SCOS" + sentence.substring(5, 27) + "#\n",
+                        remoteAddress));
+            } else if (type.equals("R0") && pendingCommand != null) {
+                String command = pendingCommand.equals(Command.TYPE_ALARM_ARM) ? "L1," : "L0,";
+                channel.write(new NetworkMessage(
+                        "\u00ff\u00ff*SCOS" + sentence.substring(5, 25) + command + sentence.substring(30) + "\n",
+                        remoteAddress));
+                pendingCommand = null;
+            }
+        }
+
+        if (!type.startsWith("D")) {
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            getLastLocation(position, null);
+
+            String payload = sentence.substring(25, sentence.length() - 1);
+
+            int index = 0;
+            String[] values = payload.substring(3).split(",");
+
+            switch (type) {
+                case "Q0":
+                    position.set(Position.KEY_BATTERY, Integer.parseInt(values[index++]) * 0.01);
+                    position.set(Position.KEY_BATTERY_LEVEL, Integer.parseInt(values[index++]));
+                    position.set(Position.KEY_RSSI, Integer.parseInt(values[index++]));
+                    break;
+                case "H0":
+                    position.set(Position.KEY_BLOCKED, Integer.parseInt(values[index++]) > 0);
+                    position.set(Position.KEY_BATTERY, Integer.parseInt(values[index++]) * 0.01);
+                    position.set(Position.KEY_RSSI, Integer.parseInt(values[index++]));
+                    position.set(Position.KEY_BATTERY_LEVEL, Integer.parseInt(values[index++]));
+                    break;
+                case "W0":
+                    switch (Integer.parseInt(values[index++])) {
+                        case 1:
+                            position.set(Position.KEY_ALARM, Position.ALARM_MOVEMENT);
+                            break;
+                        case 2:
+                            position.set(Position.KEY_ALARM, Position.ALARM_FALL_DOWN);
+                            break;
+                        case 3:
+                            position.set(Position.KEY_ALARM, Position.ALARM_LOW_BATTERY);
+                            break;
+                        default:
+                            break;
+                    }
+                    break;
+                case "E0":
+                    position.set(Position.KEY_ALARM, Position.ALARM_FAULT);
+                    position.set("error", Integer.parseInt(values[index++]));
+                    break;
+                case "S1":
+                    position.set(Position.KEY_EVENT, Integer.parseInt(values[index++]));
+                    break;
+                case "R0":
+                case "L0":
+                case "L1":
+                case "S4":
+                case "S5":
+                case "S6":
+                case "S7":
+                case "V0":
+                case "G0":
+                case "K0":
+                case "I0":
+                case "M0":
+                    position.set(Position.KEY_RESULT, payload);
+                    break;
+                default:
+                    break;
+            }
+
+            return !position.getAttributes().isEmpty() ? position : null;
+
+        } else {
+
+            Parser parser = new Parser(PATTERN, sentence);
+            if (!parser.matches()) {
+                return null;
+            }
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            DateBuilder dateBuilder = new DateBuilder()
+                    .setTime(parser.nextInt(), parser.nextInt(), parser.nextInt());
+
+            position.setValid(parser.next().equals("A"));
+            position.setLatitude(parser.nextCoordinate());
+            position.setLongitude(parser.nextCoordinate());
+
+            position.set(Position.KEY_SATELLITES, parser.nextInt());
+            position.set(Position.KEY_HDOP, parser.nextDouble());
+
+            dateBuilder.setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt());
+            position.setTime(dateBuilder.getDate());
+
+            position.setAltitude(parser.nextDouble());
+
+            return position;
+
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Xrb28ProtocolEncoder.java b/src/main/java/org/traccar/protocol/Xrb28ProtocolEncoder.java
new file mode 100644
index 000000000..617639312
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Xrb28ProtocolEncoder.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolEncoder;
+import org.traccar.model.Command;
+
+public class Xrb28ProtocolEncoder extends BaseProtocolEncoder {
+
+    private String formatCommand(Command command, String content) {
+        return String.format("\u00ff\u00ff*SCOS,OM,%s,%s#\n", getUniqueId(command.getDeviceId()), content);
+    }
+
+    @Override
+    protected Object encodeCommand(Channel channel, Command command) {
+
+        switch (command.getType()) {
+            case Command.TYPE_CUSTOM:
+                return formatCommand(command, command.getString(Command.KEY_DATA));
+            case Command.TYPE_POSITION_SINGLE:
+                return formatCommand(command, "D0");
+            case Command.TYPE_POSITION_PERIODIC:
+                return formatCommand(command, "D1," + command.getInteger(Command.KEY_FREQUENCY));
+            case Command.TYPE_ENGINE_STOP:
+            case Command.TYPE_ALARM_DISARM:
+                if (channel != null) {
+                    Xrb28ProtocolDecoder decoder = channel.pipeline().get(Xrb28ProtocolDecoder.class);
+                    if (decoder != null) {
+                        decoder.setPendingCommand(command.getType());
+                    }
+                }
+                return formatCommand(command, "R0,0,20,1234," + System.currentTimeMillis() / 1000);
+            default:
+                return null;
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Xt013Protocol.java b/src/main/java/org/traccar/protocol/Xt013Protocol.java
new file mode 100644
index 000000000..ebb3c123f
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Xt013Protocol.java
@@ -0,0 +1,40 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+import io.netty.handler.codec.LineBasedFrameDecoder;
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+
+public class Xt013Protocol extends BaseProtocol {
+
+    public Xt013Protocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LineBasedFrameDecoder(1024));
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new Xt013ProtocolDecoder(Xt013Protocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Xt013ProtocolDecoder.java b/src/main/java/org/traccar/protocol/Xt013ProtocolDecoder.java
new file mode 100644
index 000000000..f49fb9563
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Xt013ProtocolDecoder.java
@@ -0,0 +1,94 @@
+/*
+ * Copyright 2015 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class Xt013ProtocolDecoder extends BaseProtocolDecoder {
+
+    public Xt013ProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .number("HI,d+").optional()
+            .text("TK,")
+            .number("(d+),")                     // imei
+            .number("(dd)(dd)(dd)")              // date (yymmdd)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .number("([+-]d+.d+),")              // latitude
+            .number("([+-]d+.d+),")              // longitude
+            .number("(d+),")                     // speed
+            .number("(d+),")                     // course
+            .number("d+,")
+            .number("(d+),")                     // altitude
+            .expression("([FL]),")               // gps fix
+            .number("d+,")
+            .number("(d+),")                     // gps level
+            .number("x+,")
+            .number("x+,")
+            .number("(d+),")                     // gsm level
+            .expression("[^,]*,")
+            .number("(d+.d+),")                  // battery
+            .number("(d),")                      // charging
+            .any()
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setTime(parser.nextDateTime());
+
+        position.setLatitude(parser.nextDouble(0));
+        position.setLongitude(parser.nextDouble(0));
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
+        position.setCourse(parser.nextDouble(0));
+        position.setAltitude(parser.nextDouble(0));
+        position.setValid(parser.next().equals("F"));
+
+        position.set(Position.KEY_SATELLITES, parser.nextInt());
+        position.set(Position.KEY_RSSI, parser.nextDouble());
+        position.set(Position.KEY_BATTERY, parser.nextDouble(0));
+        position.set(Position.KEY_CHARGE, parser.next().equals("1"));
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Xt2400Protocol.java b/src/main/java/org/traccar/protocol/Xt2400Protocol.java
new file mode 100644
index 000000000..9427876c8
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Xt2400Protocol.java
@@ -0,0 +1,33 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class Xt2400Protocol extends BaseProtocol {
+
+    public Xt2400Protocol() {
+        addServer(new TrackerServer(true, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new Xt2400ProtocolDecoder(Xt2400Protocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/Xt2400ProtocolDecoder.java b/src/main/java/org/traccar/protocol/Xt2400ProtocolDecoder.java
new file mode 100644
index 000000000..819011a50
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/Xt2400ProtocolDecoder.java
@@ -0,0 +1,198 @@
+/*
+ * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.Context;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.helper.DataConverter;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.Date;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class Xt2400ProtocolDecoder extends BaseProtocolDecoder {
+
+    public Xt2400ProtocolDecoder(Protocol protocol) {
+        super(protocol);
+
+        String config = Context.getConfig().getString(getProtocolName() + ".config");
+        if (config != null) {
+            setConfig(config);
+        }
+    }
+
+    private static final Map<Integer, Integer> TAG_LENGTH_MAP = new HashMap<>();
+
+    static {
+        int[] l1 = {
+                0x01, 0x02, 0x04, 0x0b, 0x0c, 0x0d, 0x12, 0x13,
+                0x16, 0x17, 0x1c, 0x1f, 0x23, 0x2c, 0x2d, 0x30,
+                0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38,
+                0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x40, 0x41,
+                0x53, 0x66, 0x69, 0x6a, 0x93, 0x94, 0x96
+        };
+        int[] l2 = {
+                0x05, 0x09, 0x0a, 0x14, 0x15, 0x1d, 0x1e, 0x24,
+                0x26, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48,
+                0x49, 0x57, 0x58, 0x59, 0x5a, 0x6b, 0x6f, 0x7A,
+                0x7B, 0x7C, 0x7d, 0x7E, 0x7F, 0x80, 0x81, 0x82,
+                0x83, 0x84, 0x85, 0x86
+        };
+        int[] l4 = {
+                0x03, 0x06, 0x07, 0x08, 0x0e, 0x0f, 0x10, 0x11,
+                0x18, 0x19, 0x1a, 0x1b, 0x20, 0x21, 0x22, 0x2e,
+                0x2f, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, 0x50,
+                0x51, 0x52, 0x54, 0x55, 0x56, 0x5b, 0x5c, 0x5d,
+                0x5e, 0x5f, 0x60, 0x61, 0x62, 0x68, 0x6e, 0x71,
+                0x72, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x87,
+                0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d
+        };
+        for (int i : l1) {
+            TAG_LENGTH_MAP.put(i, 1);
+        }
+        for (int i : l2) {
+            TAG_LENGTH_MAP.put(i, 2);
+        }
+        for (int i : l4) {
+            TAG_LENGTH_MAP.put(i, 4);
+        }
+        TAG_LENGTH_MAP.put(0x95, 24);
+    }
+
+    private static int getTagLength(int tag) {
+        Integer length = TAG_LENGTH_MAP.get(tag);
+        if (length == null) {
+            throw new IllegalArgumentException("Unknown tag: " + tag);
+        }
+        return length;
+    }
+
+    private Map<Short, byte[]> formats = new HashMap<>();
+
+    public void setConfig(String configString) {
+        Pattern pattern = Pattern.compile(":wycfg pcr\\[\\d+\\] ([0-9a-fA-F]{2})[0-9a-fA-F]{2}([0-9a-fA-F]+)");
+        Matcher matcher = pattern.matcher(configString);
+        while (matcher.find()) {
+            formats.put(Short.parseShort(matcher.group(1), 16), DataConverter.parseHex(matcher.group(2)));
+        }
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ByteBuf buf = (ByteBuf) msg;
+
+        byte[] format = null;
+        if (formats.size() > 1) {
+            format = formats.get(buf.getUnsignedByte(buf.readerIndex()));
+        } else if (!formats.isEmpty()) {
+            format = formats.values().iterator().next();
+        }
+
+        if (format == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+
+        for (byte tag : format) {
+            switch (tag) {
+                case 0x03:
+                    DeviceSession deviceSession = getDeviceSession(
+                            channel, remoteAddress, String.valueOf(buf.readUnsignedInt()));
+                    if (deviceSession == null) {
+                        return null;
+                    }
+                    position.setDeviceId(deviceSession.getDeviceId());
+                    break;
+                case 0x04:
+                    position.set(Position.KEY_EVENT, buf.readUnsignedByte());
+                    break;
+                case 0x05:
+                    position.set(Position.KEY_INDEX, buf.readUnsignedShort());
+                    break;
+                case 0x06:
+                    position.setTime(new Date(buf.readUnsignedInt() * 1000));
+                    break;
+                case 0x07:
+                    position.setLatitude(buf.readInt() * 0.000001);
+                    break;
+                case 0x08:
+                    position.setLongitude(buf.readInt() * 0.000001);
+                    break;
+                case 0x09:
+                    position.setAltitude(buf.readShort() * 0.1);
+                    break;
+                case 0x0a:
+                    position.setCourse(buf.readShort() * 0.1);
+                    break;
+                case 0x0b:
+                    position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte()));
+                    break;
+                case 0x10:
+                    position.set(Position.KEY_ODOMETER_TRIP, buf.readUnsignedInt());
+                    break;
+                case 0x12:
+                    position.set(Position.KEY_HDOP, buf.readUnsignedByte() * 0.1);
+                    break;
+                case 0x13:
+                    position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
+                    break;
+                case 0x14:
+                    position.set(Position.KEY_RSSI, buf.readShort());
+                    break;
+                case 0x16:
+                    position.set(Position.KEY_BATTERY, buf.readUnsignedByte() * 0.1);
+                    break;
+                case 0x17:
+                    position.set(Position.KEY_POWER, buf.readUnsignedByte() * 0.1);
+                    break;
+                case 0x57:
+                    position.set(Position.KEY_OBD_SPEED, UnitsConverter.knotsFromKph(buf.readUnsignedShort()));
+                    break;
+                case 0x65:
+                    position.set(Position.KEY_VIN, buf.readSlice(17).toString(StandardCharsets.US_ASCII));
+                    break;
+                case 0x73:
+                    position.set(Position.KEY_VERSION_FW, buf.readSlice(16).toString(StandardCharsets.US_ASCII).trim());
+                    break;
+                default:
+                    buf.skipBytes(getTagLength(tag));
+                    break;
+            }
+        }
+
+        if (position.getLatitude() != 0 && position.getLongitude() != 0) {
+            position.setValid(true);
+        } else {
+            getLastLocation(position, position.getDeviceTime());
+        }
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/YwtProtocol.java b/src/main/java/org/traccar/protocol/YwtProtocol.java
new file mode 100644
index 000000000..c525b75cf
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/YwtProtocol.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2015 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.handler.codec.LineBasedFrameDecoder;
+import io.netty.handler.codec.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+
+public class YwtProtocol extends BaseProtocol {
+
+    public YwtProtocol() {
+        addServer(new TrackerServer(false, getName()) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline) {
+                pipeline.addLast(new LineBasedFrameDecoder(1024));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new YwtProtocolDecoder(YwtProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/YwtProtocolDecoder.java b/src/main/java/org/traccar/protocol/YwtProtocolDecoder.java
new file mode 100644
index 000000000..bf5a23fa7
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/YwtProtocolDecoder.java
@@ -0,0 +1,116 @@
+/*
+ * Copyright 2013 - 2018 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
+import org.traccar.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class YwtProtocolDecoder extends BaseProtocolDecoder {
+
+    public YwtProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .expression("%(..),")                // type
+            .number("(d+):")                     // unit identifier
+            .number("d+,")                       // subtype
+            .number("(dd)(dd)(dd)")              // date (yymmdd)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .expression("([EW])")
+            .number("(ddd.d{6}),")               // longitude
+            .expression("([NS])")
+            .number("(dd.d{6}),")                // latitude
+            .number("(d+)?,")                    // altitude
+            .number("(d+),")                     // speed
+            .number("(d+),")                     // course
+            .number("(d+),")                     // satellite
+            .expression("([^,]+),")              // report identifier
+            .expression("([-0-9a-fA-F]+)")       // status
+            .any()
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        String sentence = (String) msg;
+
+        // Synchronization
+        if (sentence.startsWith("%SN") && channel != null) {
+            int start = sentence.indexOf(':');
+            int end = start;
+            for (int i = 0; i < 4; i++) {
+                end = sentence.indexOf(',', end + 1);
+            }
+            if (end == -1) {
+                end = sentence.length();
+            }
+
+            channel.writeAndFlush(new NetworkMessage("%AT+SN=" + sentence.substring(start, end), remoteAddress));
+            return null;
+        }
+
+        Parser parser = new Parser(PATTERN, sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+
+        String type = parser.next();
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.setTime(parser.nextDateTime());
+
+        position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG));
+        position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG));
+        position.setAltitude(parser.nextDouble(0));
+        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble()));
+        position.setCourse(parser.nextDouble());
+
+        int satellites = parser.nextInt();
+        position.setValid(satellites != 0);
+        position.set(Position.KEY_SATELLITES, satellites);
+
+        String reportId = parser.next();
+
+        position.set(Position.KEY_STATUS, parser.next());
+
+        // Send response
+        if ((type.equals("KP") || type.equals("EP")) && channel != null) {
+            channel.writeAndFlush(new NetworkMessage("%AT+" + type + "=" + reportId + "\r\n", remoteAddress));
+        }
+
+        return position;
+    }
+
+}