Merge branch 'master' into master

35 files changed, 875 insertions, 266 deletions

diff --git a/src/org/traccar/BaseProtocol.java b/src/org/traccar/BaseProtocol.java
index 90b9f21f2..07adbea5e 100644
--- a/src/org/traccar/BaseProtocol.java
+++ b/src/org/traccar/BaseProtocol.java
@@ -18,9 +18,9 @@ package org.traccar;
 import org.jboss.netty.buffer.ChannelBuffers;
 import org.jboss.netty.handler.codec.string.StringEncoder;
 import org.traccar.database.ActiveDevice;
+import org.traccar.helper.DataConverter;
 import org.traccar.model.Command;
 
-import javax.xml.bind.DatatypeConverter;
 import java.util.Arrays;
 import java.util.Collection;
 import java.util.HashSet;
@@ -79,7 +79,7 @@ public abstract class BaseProtocol implements Protocol {
             if (activeDevice.getChannel().getPipeline().get(StringEncoder.class) != null) {
                 activeDevice.write(data);
             } else {
-                activeDevice.write(ChannelBuffers.wrappedBuffer(DatatypeConverter.parseHexBinary(data)));
+                activeDevice.write(ChannelBuffers.wrappedBuffer(DataConverter.parseHex(data)));
             }
         } else {
             throw new RuntimeException("Command " + command.getType() + " is not supported in protocol " + getName());
diff --git a/src/org/traccar/ExtendedObjectDecoder.java b/src/org/traccar/ExtendedObjectDecoder.java
index 268e6f688..75a24212f 100644
--- a/src/org/traccar/ExtendedObjectDecoder.java
+++ b/src/org/traccar/ExtendedObjectDecoder.java
@@ -23,9 +23,9 @@ import org.jboss.netty.channel.ChannelHandlerContext;
 import org.jboss.netty.channel.ChannelUpstreamHandler;
 import org.jboss.netty.channel.Channels;
 import org.jboss.netty.channel.MessageEvent;
+import org.traccar.helper.DataConverter;
 import org.traccar.model.Position;
 
-import javax.xml.bind.DatatypeConverter;
 import java.net.SocketAddress;
 import java.nio.charset.StandardCharsets;
 import java.util.Collection;
@@ -39,7 +39,7 @@ public abstract class ExtendedObjectDecoder implements ChannelUpstreamHandler {
                 ChannelBuffer buf = (ChannelBuffer) originalMessage;
                 position.set(Position.KEY_ORIGINAL, ChannelBuffers.hexDump(buf, 0, buf.writerIndex()));
             } else if (originalMessage instanceof String) {
-                position.set(Position.KEY_ORIGINAL, DatatypeConverter.printHexBinary(
+                position.set(Position.KEY_ORIGINAL, DataConverter.printHex(
                                 ((String) originalMessage).getBytes(StandardCharsets.US_ASCII)));
             }
         }
diff --git a/src/org/traccar/api/MediaFilter.java b/src/org/traccar/api/MediaFilter.java
index 4685ce05b..25e242b01 100644
--- a/src/org/traccar/api/MediaFilter.java
+++ b/src/org/traccar/api/MediaFilter.java
@@ -43,7 +43,7 @@ public class MediaFilter implements Filter {
     @Override
     public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
             throws IOException, ServletException {
-        HttpServletResponse httpResponse = ((HttpServletResponse) response);
+        HttpServletResponse httpResponse = (HttpServletResponse) response;
         try {
             HttpSession session = ((HttpServletRequest) request).getSession(false);
             Long userId = null;
diff --git a/src/org/traccar/api/SecurityRequestFilter.java b/src/org/traccar/api/SecurityRequestFilter.java
index 7024bdbc9..aace9f705 100644
--- a/src/org/traccar/api/SecurityRequestFilter.java
+++ b/src/org/traccar/api/SecurityRequestFilter.java
@@ -17,6 +17,7 @@ package org.traccar.api;
 
 import org.traccar.Context;
 import org.traccar.api.resource.SessionResource;
+import org.traccar.helper.DataConverter;
 import org.traccar.helper.Log;
 import org.traccar.model.User;
 
@@ -28,7 +29,6 @@ import javax.ws.rs.container.ContainerRequestFilter;
 import javax.ws.rs.container.ResourceInfo;
 import javax.ws.rs.core.Response;
 import javax.ws.rs.core.SecurityContext;
-import javax.xml.bind.DatatypeConverter;
 import java.lang.reflect.Method;
 import java.nio.charset.StandardCharsets;
 import java.sql.SQLException;
@@ -43,7 +43,7 @@ public class SecurityRequestFilter implements ContainerRequestFilter {
 
     public static String[] decodeBasicAuth(String auth) {
         auth = auth.replaceFirst("[B|b]asic ", "");
-        byte[] decodedBytes = DatatypeConverter.parseBase64Binary(auth);
+        byte[] decodedBytes = DataConverter.parseBase64(auth);
         if (decodedBytes != null && decodedBytes.length > 0) {
             return new String(decodedBytes, StandardCharsets.US_ASCII).split(":", 2);
         }
diff --git a/src/org/traccar/api/resource/SessionResource.java b/src/org/traccar/api/resource/SessionResource.java
index 2a0bd4364..fd331c766 100644
--- a/src/org/traccar/api/resource/SessionResource.java
+++ b/src/org/traccar/api/resource/SessionResource.java
@@ -17,6 +17,7 @@ package org.traccar.api.resource;
 
 import org.traccar.Context;
 import org.traccar.api.BaseResource;
+import org.traccar.helper.DataConverter;
 import org.traccar.helper.LogAction;
 import org.traccar.model.User;
 
@@ -34,7 +35,6 @@ import javax.ws.rs.QueryParam;
 import javax.ws.rs.WebApplicationException;
 import javax.ws.rs.core.MediaType;
 import javax.ws.rs.core.Response;
-import javax.xml.bind.DatatypeConverter;
 
 import java.io.UnsupportedEncodingException;
 import java.net.URLDecoder;
@@ -63,11 +63,11 @@ public class SessionResource extends BaseResource {
             if (cookies != null) {
                 for (Cookie cookie : cookies) {
                     if (cookie.getName().equals(USER_COOKIE_KEY)) {
-                        byte[] emailBytes = DatatypeConverter.parseBase64Binary(
+                        byte[] emailBytes = DataConverter.parseBase64(
                                 URLDecoder.decode(cookie.getValue(), StandardCharsets.US_ASCII.name()));
                         email = new String(emailBytes, StandardCharsets.UTF_8);
                     } else if (cookie.getName().equals(PASS_COOKIE_KEY)) {
-                        byte[] passwordBytes = DatatypeConverter.parseBase64Binary(
+                        byte[] passwordBytes = DataConverter.parseBase64(
                                 URLDecoder.decode(cookie.getValue(), StandardCharsets.US_ASCII.name()));
                         password = new String(passwordBytes, StandardCharsets.UTF_8);
                     }
diff --git a/src/org/traccar/events/AlertEventHandler.java b/src/org/traccar/events/AlertEventHandler.java
index 003ccb662..7db371c70 100644
--- a/src/org/traccar/events/AlertEventHandler.java
+++ b/src/org/traccar/events/AlertEventHandler.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2016 Anton Tananaev (anton@traccar.org)
+ * 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.
@@ -19,18 +19,34 @@ import java.util.Collections;
 import java.util.Map;
 
 import org.traccar.BaseEventHandler;
+import org.traccar.Context;
 import org.traccar.model.Event;
 import org.traccar.model.Position;
 
 public class AlertEventHandler extends BaseEventHandler {
 
+    private final boolean ignoreDuplicateAlerts;
+
+    public AlertEventHandler() {
+        ignoreDuplicateAlerts = Context.getConfig().getBoolean("event.ignoreDuplicateAlerts");
+    }
+
     @Override
     protected Map<Event, Position> analyzePosition(Position position) {
         Object alarm = position.getAttributes().get(Position.KEY_ALARM);
         if (alarm != null) {
-            Event event = new Event(Event.TYPE_ALARM, position.getDeviceId(), position.getId());
-            event.set(Position.KEY_ALARM, (String) alarm);
-            return Collections.singletonMap(event, position);
+            boolean ignoreAlert = false;
+            if (ignoreDuplicateAlerts) {
+                Position lastPosition = Context.getIdentityManager().getLastPosition(position.getDeviceId());
+                if (lastPosition != null && alarm.equals(lastPosition.getAttributes().get(Position.KEY_ALARM))) {
+                    ignoreAlert = true;
+                }
+            }
+            if (!ignoreAlert) {
+                Event event = new Event(Event.TYPE_ALARM, position.getDeviceId(), position.getId());
+                event.set(Position.KEY_ALARM, (String) alarm);
+                return Collections.singletonMap(event, position);
+            }
         }
         return null;
     }
diff --git a/src/org/traccar/helper/DataConverter.java b/src/org/traccar/helper/DataConverter.java
new file mode 100644
index 000000000..7abd4ae93
--- /dev/null
+++ b/src/org/traccar/helper/DataConverter.java
@@ -0,0 +1,47 @@
+/*
+ * 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.helper;
+
+import org.apache.commons.codec.DecoderException;
+import org.apache.commons.codec.binary.Base64;
+import org.apache.commons.codec.binary.Hex;
+
+public final class DataConverter {
+
+    private DataConverter() {
+    }
+
+    public static byte[] parseHex(String string) {
+        try {
+            return Hex.decodeHex(string);
+        } catch (DecoderException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    public static String printHex(byte[] data) {
+        return Hex.encodeHexString(data);
+    }
+
+    public static byte[] parseBase64(String string) {
+        return Base64.decodeBase64(string);
+    }
+
+    public static String printBase64(byte[] data) {
+        return Base64.encodeBase64String(data);
+    }
+
+}
diff --git a/src/org/traccar/helper/Hashing.java b/src/org/traccar/helper/Hashing.java
index 3fcc124fa..e91310eda 100644
--- a/src/org/traccar/helper/Hashing.java
+++ b/src/org/traccar/helper/Hashing.java
@@ -17,7 +17,6 @@ package org.traccar.helper;
 
 import javax.crypto.SecretKeyFactory;
 import javax.crypto.spec.PBEKeySpec;
-import javax.xml.bind.DatatypeConverter;
 import java.security.NoSuchAlgorithmException;
 import java.security.SecureRandom;
 import java.security.spec.InvalidKeySpecException;
@@ -75,13 +74,13 @@ public final class Hashing {
         RANDOM.nextBytes(salt);
         byte[] hash = function(password.toCharArray(), salt);
         return new HashingResult(
-                DatatypeConverter.printHexBinary(hash),
-                DatatypeConverter.printHexBinary(salt));
+                DataConverter.printHex(hash),
+                DataConverter.printHex(salt));
     }
 
     public static boolean validatePassword(String password, String hashHex, String saltHex) {
-        byte[] hash = DatatypeConverter.parseHexBinary(hashHex);
-        byte[] salt = DatatypeConverter.parseHexBinary(saltHex);
+        byte[] hash = DataConverter.parseHex(hashHex);
+        byte[] salt = DataConverter.parseHex(saltHex);
         return slowEquals(hash, function(password.toCharArray(), salt));
     }
 
diff --git a/src/org/traccar/helper/ObdDecoder.java b/src/org/traccar/helper/ObdDecoder.java
index 4bc3bcdfb..1bdcce352 100644
--- a/src/org/traccar/helper/ObdDecoder.java
+++ b/src/org/traccar/helper/ObdDecoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2015 - 2016 Anton Tananaev (anton@traccar.org)
+ * 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.
@@ -29,15 +29,6 @@ public final class ObdDecoder {
     private static final int MODE_FREEZE_FRAME = 0x02;
     private static final int MODE_CODES = 0x03;
 
-    private static final int PID_ENGINE_LOAD = 0x04;
-    private static final int PID_COOLANT_TEMPERATURE = 0x05;
-    private static final int PID_ENGINE_RPM = 0x0C;
-    private static final int PID_VEHICLE_SPEED = 0x0D;
-    private static final int PID_THROTTLE_POSITION = 0x11;
-    private static final int PID_MIL_DISTANCE = 0x21;
-    private static final int PID_FUEL_LEVEL = 0x2F;
-    private static final int PID_DISTANCE_CLEARED = 0x31;
-
     public static Map.Entry<String, Object> decode(int mode, String value) {
         switch (mode) {
             case MODE_CURRENT:
@@ -86,21 +77,25 @@ public final class ObdDecoder {
 
     public static Map.Entry<String, Object> decodeData(int pid, int value, boolean convert) {
         switch (pid) {
-            case PID_ENGINE_LOAD:
+            case 0x04:
                 return createEntry(Position.KEY_ENGINE_LOAD, convert ? value * 100 / 255 : value);
-            case PID_COOLANT_TEMPERATURE:
+            case 0x05:
                 return createEntry(Position.KEY_COOLANT_TEMP, convert ? value - 40 : value);
-            case PID_ENGINE_RPM:
+            case 0x0B:
+                return createEntry("mapIntake", value);
+            case 0x0C:
                 return createEntry(Position.KEY_RPM, convert ? value / 4 : value);
-            case PID_VEHICLE_SPEED:
+            case 0x0D:
                 return createEntry(Position.KEY_OBD_SPEED, value);
-            case PID_THROTTLE_POSITION:
+            case 0x0F:
+                return createEntry("intakeTemp", convert ? value - 40 : value);
+            case 0x11:
                 return createEntry(Position.KEY_THROTTLE, convert ? value * 100 / 255 : value);
-            case PID_MIL_DISTANCE:
+            case 0x21:
                 return createEntry("milDistance", value);
-            case PID_FUEL_LEVEL:
+            case 0x2F:
                 return createEntry(Position.KEY_FUEL_LEVEL, convert ? value * 100 / 255 : value);
-            case PID_DISTANCE_CLEARED:
+            case 0x31:
                 return createEntry("clearedDistance", value);
             default:
                 return null;
diff --git a/src/org/traccar/model/Position.java b/src/org/traccar/model/Position.java
index fdecb7e20..0e8bd9a6e 100644
--- a/src/org/traccar/model/Position.java
+++ b/src/org/traccar/model/Position.java
@@ -121,6 +121,7 @@ public class Position extends Message {
     public static final String ALARM_GPS_ANTENNA_CUT = "gpsAntennaCut";
     public static final String ALARM_ACCIDENT = "accident";
     public static final String ALARM_TOW = "tow";
+    public static final String ALARM_IDLE = "idle";
     public static final String ALARM_ACCELERATION = "hardAcceleration";
     public static final String ALARM_BRAKING = "hardBraking";
     public static final String ALARM_CORNERING = "hardCornering";
diff --git a/src/org/traccar/protocol/At2000ProtocolDecoder.java b/src/org/traccar/protocol/At2000ProtocolDecoder.java
index 06d80c497..e0f2b4278 100644
--- a/src/org/traccar/protocol/At2000ProtocolDecoder.java
+++ b/src/org/traccar/protocol/At2000ProtocolDecoder.java
@@ -20,13 +20,13 @@ import org.jboss.netty.buffer.ChannelBuffers;
 import org.jboss.netty.channel.Channel;
 import org.traccar.BaseProtocolDecoder;
 import org.traccar.DeviceSession;
+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 javax.xml.bind.DatatypeConverter;
 import java.net.SocketAddress;
 import java.nio.ByteOrder;
 import java.nio.charset.StandardCharsets;
@@ -84,7 +84,7 @@ public class At2000ProtocolDecoder extends BaseProtocolDecoder {
                 IvParameterSpec ivSpec = new IvParameterSpec(iv);
 
                 SecretKeySpec keySpec = new SecretKeySpec(
-                        DatatypeConverter.parseHexBinary("000102030405060708090a0b0c0d0e0f"), "AES");
+                        DataConverter.parseHex("000102030405060708090a0b0c0d0e0f"), "AES");
 
                 cipher = Cipher.getInstance("AES/CBC/NoPadding");
                 cipher.init(Cipher.DECRYPT_MODE, keySpec, ivSpec);
diff --git a/src/org/traccar/protocol/AtrackProtocolDecoder.java b/src/org/traccar/protocol/AtrackProtocolDecoder.java
index 236b608d6..8138f0fcb 100644
--- a/src/org/traccar/protocol/AtrackProtocolDecoder.java
+++ b/src/org/traccar/protocol/AtrackProtocolDecoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2013 - 2017 Anton Tananaev (anton@traccar.org)
+ * 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.
@@ -36,6 +36,7 @@ import java.util.HashMap;
 import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
+import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
 public class AtrackProtocolDecoder extends BaseProtocolDecoder {
@@ -43,6 +44,7 @@ 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;
 
@@ -52,6 +54,7 @@ public class AtrackProtocolDecoder extends BaseProtocolDecoder {
         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");
@@ -330,7 +333,17 @@ public class AtrackProtocolDecoder extends BaseProtocolDecoder {
             position.set(Position.PREFIX_TEMP + 1, buf.readShort() * 0.1);
             position.set(Position.PREFIX_TEMP + 2, buf.readShort() * 0.1);
 
-            position.set("message", readString(buf));
+            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;
diff --git a/src/org/traccar/protocol/CastelProtocol.java b/src/org/traccar/protocol/CastelProtocol.java
index db9df0674..d5ba5cd55 100644
--- a/src/org/traccar/protocol/CastelProtocol.java
+++ b/src/org/traccar/protocol/CastelProtocol.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2015 Anton Tananaev (anton@traccar.org)
+ * 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.
@@ -21,6 +21,7 @@ import org.jboss.netty.channel.ChannelPipeline;
 import org.jboss.netty.handler.codec.frame.LengthFieldBasedFrameDecoder;
 import org.traccar.BaseProtocol;
 import org.traccar.TrackerServer;
+import org.traccar.model.Command;
 
 import java.nio.ByteOrder;
 import java.util.List;
@@ -29,6 +30,9 @@ public class CastelProtocol extends BaseProtocol {
 
     public CastelProtocol() {
         super("castel");
+        setSupportedDataCommands(
+                Command.TYPE_ENGINE_STOP,
+                Command.TYPE_ENGINE_RESUME);
     }
 
     @Override
@@ -37,6 +41,7 @@ public class CastelProtocol extends BaseProtocol {
             @Override
             protected void addSpecificHandlers(ChannelPipeline pipeline) {
                 pipeline.addLast("frameDecoder", new LengthFieldBasedFrameDecoder(1024, 2, 2, -4, 0));
+                pipeline.addLast("objectEncoder", new CastelProtocolEncoder());
                 pipeline.addLast("objectDecoder", new CastelProtocolDecoder(CastelProtocol.this));
             }
         };
@@ -46,6 +51,7 @@ public class CastelProtocol extends BaseProtocol {
         server = new TrackerServer(new ConnectionlessBootstrap(), getName()) {
             @Override
             protected void addSpecificHandlers(ChannelPipeline pipeline) {
+                pipeline.addLast("objectEncoder", new CastelProtocolEncoder());
                 pipeline.addLast("objectDecoder", new CastelProtocolDecoder(CastelProtocol.this));
             }
         };
diff --git a/src/org/traccar/protocol/CastelProtocolDecoder.java b/src/org/traccar/protocol/CastelProtocolDecoder.java
index ebd3d202c..44a5e213c 100644
--- a/src/org/traccar/protocol/CastelProtocolDecoder.java
+++ b/src/org/traccar/protocol/CastelProtocolDecoder.java
@@ -96,6 +96,7 @@ public class CastelProtocolDecoder extends BaseProtocolDecoder {
     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, ChannelBuffer buf) {
diff --git a/src/org/traccar/protocol/CastelProtocolEncoder.java b/src/org/traccar/protocol/CastelProtocolEncoder.java
new file mode 100644
index 000000000..7ba33ca6d
--- /dev/null
+++ b/src/org/traccar/protocol/CastelProtocolEncoder.java
@@ -0,0 +1,73 @@
+/*
+ * 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.jboss.netty.buffer.ChannelBuffer;
+import org.jboss.netty.buffer.ChannelBuffers;
+import org.traccar.BaseProtocolEncoder;
+import org.traccar.Context;
+import org.traccar.helper.Checksum;
+import org.traccar.helper.Log;
+import org.traccar.model.Command;
+
+import java.nio.ByteOrder;
+import java.nio.charset.StandardCharsets;
+
+public class CastelProtocolEncoder extends BaseProtocolEncoder {
+
+    private ChannelBuffer encodeContent(long deviceId, short type, ChannelBuffer content) {
+        ChannelBuffer buf = ChannelBuffers.dynamicBuffer(ByteOrder.LITTLE_ENDIAN, 0);
+        String uniqueId = Context.getIdentityManager().getById(deviceId).getUniqueId();
+
+        buf.writeByte('@');
+        buf.writeByte('@');
+
+        buf.writeShort(2 + 2 + 1 + 20 + content.readableBytes()); // length
+
+        buf.writeByte(4); // protocol version
+
+        buf.writeBytes(uniqueId.getBytes(StandardCharsets.US_ASCII));
+        buf.writeZero(20 - uniqueId.length());
+
+        buf.writeShort(ChannelBuffers.swapShort(type));
+        buf.writeBytes(content);
+
+        buf.writeShort(Checksum.crc16(Checksum.CRC16_X25, buf.toByteBuffer()));
+
+        buf.writeByte('\r');
+        buf.writeByte('\n');
+
+        return buf;
+    }
+
+    @Override
+    protected Object encodeCommand(Command command) {
+        ChannelBuffer content = ChannelBuffers.dynamicBuffer(ByteOrder.LITTLE_ENDIAN, 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:
+                Log.warning(new UnsupportedOperationException(command.getType()));
+                break;
+        }
+        return null;
+    }
+
+}
diff --git a/src/org/traccar/protocol/CautelaProtocol.java b/src/org/traccar/protocol/CautelaProtocol.java
new file mode 100644
index 000000000..89ab7a1d0
--- /dev/null
+++ b/src/org/traccar/protocol/CautelaProtocol.java
@@ -0,0 +1,47 @@
+/*
+ * 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.jboss.netty.bootstrap.ServerBootstrap;
+import org.jboss.netty.channel.ChannelPipeline;
+import org.jboss.netty.handler.codec.frame.LineBasedFrameDecoder;
+import org.jboss.netty.handler.codec.string.StringDecoder;
+import org.jboss.netty.handler.codec.string.StringEncoder;
+import org.traccar.BaseProtocol;
+import org.traccar.TrackerServer;
+
+import java.util.List;
+
+public class CautelaProtocol extends BaseProtocol {
+
+    public CautelaProtocol() {
+        super("cautela");
+    }
+
+    @Override
+    public void initTrackerServers(List<TrackerServer> serverList) {
+        serverList.add(new TrackerServer(new ServerBootstrap(), getName()) {
+            @Override
+            protected void addSpecificHandlers(ChannelPipeline pipeline) {
+                pipeline.addLast("frameDecoder", new LineBasedFrameDecoder(1024));
+                pipeline.addLast("stringEncoder", new StringEncoder());
+                pipeline.addLast("stringDecoder", new StringDecoder());
+                pipeline.addLast("objectDecoder", new CautelaProtocolDecoder(CautelaProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/org/traccar/protocol/CautelaProtocolDecoder.java b/src/org/traccar/protocol/CautelaProtocolDecoder.java
new file mode 100644
index 000000000..d7bf4fb51
--- /dev/null
+++ b/src/org/traccar/protocol/CautelaProtocolDecoder.java
@@ -0,0 +1,77 @@
+/*
+ * 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.jboss.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+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(CautelaProtocol 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;
+        }
+
+        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());
+
+        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/org/traccar/protocol/ContinentalProtocol.java b/src/org/traccar/protocol/ContinentalProtocol.java
new file mode 100644
index 000000000..e2b1226cf
--- /dev/null
+++ b/src/org/traccar/protocol/ContinentalProtocol.java
@@ -0,0 +1,43 @@
+/*
+ * 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.jboss.netty.bootstrap.ServerBootstrap;
+import org.jboss.netty.channel.ChannelPipeline;
+import org.jboss.netty.handler.codec.frame.LengthFieldBasedFrameDecoder;
+import org.traccar.BaseProtocol;
+import org.traccar.TrackerServer;
+
+import java.util.List;
+
+public class ContinentalProtocol extends BaseProtocol {
+
+    public ContinentalProtocol() {
+        super("continental");
+    }
+
+    @Override
+    public void initTrackerServers(List<TrackerServer> serverList) {
+        serverList.add(new TrackerServer(new ServerBootstrap(), getName()) {
+            @Override
+            protected void addSpecificHandlers(ChannelPipeline pipeline) {
+                pipeline.addLast("frameDecoder", new LengthFieldBasedFrameDecoder(1024, 2, 2));
+                pipeline.addLast("objectDecoder", new ContinentalProtocolDecoder(ContinentalProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/org/traccar/protocol/ContinentalProtocolDecoder.java b/src/org/traccar/protocol/ContinentalProtocolDecoder.java
new file mode 100644
index 000000000..2138eb39e
--- /dev/null
+++ b/src/org/traccar/protocol/ContinentalProtocolDecoder.java
@@ -0,0 +1,93 @@
+/*
+ * 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.jboss.netty.buffer.ChannelBuffer;
+import org.jboss.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+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(ContinentalProtocol 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;
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        ChannelBuffer buf = (ChannelBuffer) msg;
+
+        buf.skipBytes(2); // header
+        buf.readUnsignedShort(); // length
+        buf.readUnsignedByte(); // software version
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, String.valueOf(buf.readUnsignedInt()));
+        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));
+
+            buf.readUnsignedByte();
+            position.setLatitude(buf.readMedium() / 3600.0);
+
+            buf.readUnsignedByte();
+            position.setLongitude(buf.readMedium() / 3600.0);
+
+            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());
+            position.set(Position.KEY_INPUT, buf.readUnsignedShort());
+            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
+
+            return position;
+
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/org/traccar/protocol/DmtProtocolDecoder.java b/src/org/traccar/protocol/DmtProtocolDecoder.java
index 74db5a6f7..30a6ae13a 100644
--- a/src/org/traccar/protocol/DmtProtocolDecoder.java
+++ b/src/org/traccar/protocol/DmtProtocolDecoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2017 Anton Tananaev (anton@traccar.org)
+ * 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.
@@ -21,6 +21,7 @@ import org.jboss.netty.channel.Channel;
 import org.traccar.BaseProtocolDecoder;
 import org.traccar.DeviceSession;
 import org.traccar.helper.BitUtil;
+import org.traccar.helper.DateBuilder;
 import org.traccar.helper.UnitsConverter;
 import org.traccar.model.Position;
 
@@ -42,6 +43,7 @@ public class DmtProtocolDecoder extends BaseProtocolDecoder {
     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;
@@ -61,142 +63,221 @@ public class DmtProtocolDecoder extends BaseProtocolDecoder {
         }
     }
 
-    @Override
-    protected Object decode(
-            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+    private List<Position> decodeFixed64(Channel channel, SocketAddress remoteAddress, ChannelBuffer buf) {
 
-        ChannelBuffer buf = (ChannelBuffer) msg;
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+        if (deviceSession == null) {
+            return null;
+        }
 
-        buf.skipBytes(2); // header
+        List<Position> positions = new LinkedList<>();
 
-        int type = buf.readUnsignedByte();
+        while (buf.readableBytes() >= 64) {
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
 
-        buf.readUnsignedShort(); // length
+            buf.readByte(); // type
 
-        if (type == MSG_HELLO) {
+            position.set(Position.KEY_INDEX, buf.readUnsignedInt());
 
-            buf.readUnsignedInt(); // device serial number
+            long time = buf.readUnsignedInt();
+            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());
 
-            DeviceSession deviceSession = getDeviceSession(
-                    channel, remoteAddress, buf.readBytes(15).toString(StandardCharsets.US_ASCII));
+            position.setLongitude(buf.readInt() * 0.0000001);
+            position.setLatitude(buf.readInt() * 0.0000001);
+            position.setSpeed(UnitsConverter.knotsFromCps(buf.readUnsignedShort()));
+            position.setCourse(buf.readUnsignedByte() * 2);
+            position.setAltitude(buf.readShort());
 
-            ChannelBuffer response = ChannelBuffers.dynamicBuffer(ByteOrder.LITTLE_ENDIAN, 0);
-            response.writeInt((int) ((System.currentTimeMillis() - 1356998400000L) / 1000));
-            response.writeInt(deviceSession != null ? 0 : 1); // flags
-            sendResponse(channel, MSG_HELLO_RESPONSE, response);
+            buf.readUnsignedShort(); // position accuracy
+            buf.readUnsignedByte(); // speed accuracy
 
-        } else if (type == MSG_COMMIT) {
+            position.set(Position.KEY_EVENT, buf.readUnsignedByte());
 
-            ChannelBuffer response = ChannelBuffers.dynamicBuffer(ByteOrder.LITTLE_ENDIAN, 0);
-            response.writeByte(1); // flags (success)
-            sendResponse(channel, MSG_COMMIT_RESPONSE, response);
+            position.setValid(BitUtil.check(buf.readByte(), 0));
 
-        } else if (type == MSG_CANNED_REQUEST_1) {
+            position.set(Position.KEY_INPUT, buf.readUnsignedInt());
+            position.set(Position.KEY_OUTPUT, buf.readUnsignedShort());
 
-            ChannelBuffer response = ChannelBuffers.dynamicBuffer(ByteOrder.LITTLE_ENDIAN, 0);
-            response.writeBytes(new byte[12]);
-            sendResponse(channel, MSG_CANNED_RESPONSE_1, response);
+            for (int i = 1; i <= 5; i++) {
+                position.set(Position.PREFIX_ADC + i, buf.readShort());
+            }
 
-        } else if (type == MSG_CANNED_REQUEST_2) {
+            position.set(Position.KEY_DEVICE_TEMP, buf.readByte());
 
-            sendResponse(channel, MSG_CANNED_RESPONSE_2, null);
+            buf.readShort(); // accelerometer x
+            buf.readShort(); // accelerometer y
+            buf.readShort(); // accelerometer z
 
-        } else if (type == MSG_DATA_RECORD) {
+            buf.skipBytes(8); // device id
 
-            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
-            if (deviceSession == null) {
-                return null;
-            }
+            position.set(Position.KEY_PDOP, buf.readUnsignedShort() * 0.01);
 
-            List<Position> positions = new LinkedList<>();
+            buf.skipBytes(2); // reserved
 
-            while (buf.readable()) {
+            buf.readUnsignedShort(); // checksum
 
-                int recordEnd = buf.readerIndex() + buf.readUnsignedShort();
+            positions.add(position);
+        }
 
-                Position position = new Position(getProtocolName());
-                position.setDeviceId(deviceSession.getDeviceId());
+        return positions;
+    }
 
-                position.set(Position.KEY_INDEX, buf.readUnsignedInt());
+    private List<Position> decodeStandard(Channel channel, SocketAddress remoteAddress, ChannelBuffer buf) {
 
-                position.setDeviceTime(new Date(1356998400000L + buf.readUnsignedInt() * 1000)); // since 1 Jan 2013
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
+        if (deviceSession == null) {
+            return null;
+        }
 
-                position.set(Position.KEY_EVENT, buf.readUnsignedByte());
+        List<Position> positions = new LinkedList<>();
 
-                while (buf.readerIndex() < recordEnd) {
+        while (buf.readable()) {
+            int recordEnd = buf.readerIndex() + buf.readUnsignedShort();
 
-                    int fieldId = buf.readUnsignedByte();
-                    int fieldLength = buf.readUnsignedByte();
-                    int fieldEnd = buf.readerIndex() + (fieldLength == 255 ? buf.readUnsignedShort() : fieldLength);
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
 
-                    if (fieldId == 0) {
+            position.set(Position.KEY_INDEX, buf.readUnsignedInt());
 
-                        position.setFixTime(new Date(1356998400000L + buf.readUnsignedInt() * 1000));
-                        position.setLatitude(buf.readInt() * 0.0000001);
-                        position.setLongitude(buf.readInt() * 0.0000001);
-                        position.setAltitude(buf.readShort());
-                        position.setSpeed(UnitsConverter.knotsFromCps(buf.readUnsignedShort()));
+            position.setDeviceTime(new Date(1356998400000L + buf.readUnsignedInt() * 1000)); // since 1 Jan 2013
 
-                        buf.readUnsignedByte(); // speed accuracy
+            position.set(Position.KEY_EVENT, buf.readUnsignedByte());
 
-                        position.setCourse(buf.readUnsignedByte() * 2);
+            while (buf.readerIndex() < recordEnd) {
 
-                        position.set(Position.KEY_PDOP, buf.readUnsignedByte() * 0.1);
+                int fieldId = buf.readUnsignedByte();
+                int fieldLength = buf.readUnsignedByte();
+                int fieldEnd = buf.readerIndex() + (fieldLength == 255 ? buf.readUnsignedShort() : fieldLength);
 
-                        position.setAccuracy(buf.readUnsignedByte());
-                        position.setValid(buf.readUnsignedByte() != 0);
+                if (fieldId == 0) {
 
-                    } else if (fieldId == 2) {
+                    position.setFixTime(new Date(1356998400000L + buf.readUnsignedInt() * 1000));
+                    position.setLatitude(buf.readInt() * 0.0000001);
+                    position.setLongitude(buf.readInt() * 0.0000001);
+                    position.setAltitude(buf.readShort());
+                    position.setSpeed(UnitsConverter.knotsFromCps(buf.readUnsignedShort()));
 
-                        int input = buf.readInt();
-                        int output = buf.readUnsignedShort();
-                        int status = buf.readUnsignedShort();
+                    buf.readUnsignedByte(); // speed accuracy
 
-                        position.set(Position.KEY_IGNITION, BitUtil.check(input, 0));
+                    position.setCourse(buf.readUnsignedByte() * 2);
 
-                        position.set(Position.KEY_INPUT, input);
-                        position.set(Position.KEY_OUTPUT, output);
-                        position.set(Position.KEY_STATUS, status);
+                    position.set(Position.KEY_PDOP, buf.readUnsignedByte() * 0.1);
 
-                    } else if (fieldId == 6) {
+                    position.setAccuracy(buf.readUnsignedByte());
+                    position.setValid(buf.readUnsignedByte() != 0);
 
-                        while (buf.readerIndex() < fieldEnd) {
-                            switch (buf.readUnsignedByte()) {
-                                case 1:
-                                    position.set(Position.KEY_BATTERY, buf.readUnsignedShort() * 0.001);
-                                    break;
-                                case 2:
-                                    position.set(Position.KEY_POWER, buf.readUnsignedShort() * 0.01);
-                                    break;
-                                case 3:
-                                    position.set(Position.KEY_DEVICE_TEMP, buf.readShort() * 0.01);
-                                    break;
-                                case 4:
-                                    position.set(Position.KEY_RSSI, buf.readUnsignedShort());
-                                    break;
-                                case 5:
-                                    position.set("solarPower", buf.readUnsignedShort() * 0.001);
-                                    break;
-                                default:
-                                    break;
-                            }
-                        }
+                } else if (fieldId == 2) {
 
-                    }
+                    int input = buf.readInt();
+                    int output = buf.readUnsignedShort();
+                    int status = buf.readUnsignedShort();
 
-                    buf.readerIndex(fieldEnd);
+                    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.readUnsignedShort() * 0.001);
+                                break;
+                            case 2:
+                                position.set(Position.KEY_POWER, buf.readUnsignedShort() * 0.01);
+                                break;
+                            case 3:
+                                position.set(Position.KEY_DEVICE_TEMP, buf.readShort() * 0.01);
+                                break;
+                            case 4:
+                                position.set(Position.KEY_RSSI, buf.readUnsignedShort());
+                                break;
+                            case 5:
+                                position.set("solarPower", buf.readUnsignedShort() * 0.001);
+                                break;
+                            default:
+                                break;
+                        }
+                    }
 
-                if (position.getFixTime() == null) {
-                    getLastLocation(position, position.getDeviceTime());
                 }
 
-                positions.add(position);
+                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 {
 
+        ChannelBuffer buf = (ChannelBuffer) msg;
+
+        buf.skipBytes(2); // header
+
+        int type = buf.readUnsignedByte();
+        int length = buf.readUnsignedShort();
+
+        if (type == MSG_HELLO) {
+
+            buf.readUnsignedInt(); // device serial number
+
+            DeviceSession deviceSession = getDeviceSession(
+                    channel, remoteAddress, buf.readBytes(15).toString(StandardCharsets.US_ASCII));
+
+            ChannelBuffer response = ChannelBuffers.dynamicBuffer(ByteOrder.LITTLE_ENDIAN, 0);
+            if (length == 51) {
+                response.writeByte(0); // reserved
+                response.writeInt(0); // reserved
+            } else {
+                response.writeInt((int) ((System.currentTimeMillis() - 1356998400000L) / 1000));
+                response.writeInt(deviceSession != null ? 0 : 1); // flags
             }
 
-            return positions;
+            sendResponse(channel, MSG_HELLO_RESPONSE, response);
+
+        } else if (type == MSG_COMMIT) {
+
+            ChannelBuffer response = ChannelBuffers.dynamicBuffer(ByteOrder.LITTLE_ENDIAN, 0);
+            response.writeByte(1); // flags (success)
+            sendResponse(channel, MSG_COMMIT_RESPONSE, response);
+
+        } else if (type == MSG_CANNED_REQUEST_1) {
+
+            ChannelBuffer response = ChannelBuffers.dynamicBuffer(ByteOrder.LITTLE_ENDIAN, 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);
 
         }
 
diff --git a/src/org/traccar/protocol/EelinkProtocolEncoder.java b/src/org/traccar/protocol/EelinkProtocolEncoder.java
index 76865a039..4d2d86e68 100644
--- a/src/org/traccar/protocol/EelinkProtocolEncoder.java
+++ b/src/org/traccar/protocol/EelinkProtocolEncoder.java
@@ -18,10 +18,10 @@ package org.traccar.protocol;
 import org.jboss.netty.buffer.ChannelBuffer;
 import org.jboss.netty.buffer.ChannelBuffers;
 import org.traccar.BaseProtocolEncoder;
+import org.traccar.helper.DataConverter;
 import org.traccar.helper.Log;
 import org.traccar.model.Command;
 
-import javax.xml.bind.DatatypeConverter;
 import java.nio.ByteBuffer;
 import java.nio.charset.StandardCharsets;
 
@@ -47,7 +47,7 @@ public class EelinkProtocolEncoder extends BaseProtocolEncoder {
         ChannelBuffer buf = ChannelBuffers.dynamicBuffer();
 
         if (connectionless) {
-            buf.writeBytes(ChannelBuffers.wrappedBuffer(DatatypeConverter.parseHexBinary('0' + uniqueId)));
+            buf.writeBytes(ChannelBuffers.wrappedBuffer(DataConverter.parseHex('0' + uniqueId)));
         }
 
         buf.writeByte(0x67);
diff --git a/src/org/traccar/protocol/FlespiProtocolDecoder.java b/src/org/traccar/protocol/FlespiProtocolDecoder.java
index be0e4a07f..526e10fa2 100644
--- a/src/org/traccar/protocol/FlespiProtocolDecoder.java
+++ b/src/org/traccar/protocol/FlespiProtocolDecoder.java
@@ -123,7 +123,7 @@ public class FlespiProtocolDecoder extends BaseHttpProtocolDecoder {
                 return true;
             case "din":
             case "dout":
-                position.set((name.equals("din") ? Position.KEY_INPUT : Position.KEY_OUTPUT),
+                position.set(name.equals("din") ? Position.KEY_INPUT : Position.KEY_OUTPUT,
                         ((JsonNumber) value).intValue());
                 return true;
             case "gps.vehicle.mileage":
diff --git a/src/org/traccar/protocol/Gl200TextProtocolDecoder.java b/src/org/traccar/protocol/Gl200TextProtocolDecoder.java
index c47764989..ff300d429 100644
--- a/src/org/traccar/protocol/Gl200TextProtocolDecoder.java
+++ b/src/org/traccar/protocol/Gl200TextProtocolDecoder.java
@@ -429,8 +429,8 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
 
         parser.next(); // odometer or external power
 
-        position.set(Position.KEY_BATTERY, parser.nextDouble(0));
-        position.set(Position.KEY_CHARGE, parser.nextInt(0) == 1);
+        position.set(Position.KEY_BATTERY, parser.nextDouble());
+        position.set(Position.KEY_CHARGE, parser.nextInt() == 1);
 
         position.set(Position.KEY_BATTERY_LEVEL, parser.nextInt());
 
@@ -444,7 +444,7 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
 
         getLastLocation(position, parser.nextDateTime());
 
-        position.set(Position.KEY_INDEX, parser.nextHexInt(0));
+        position.set(Position.KEY_INDEX, parser.nextHexInt());
 
         return position;
     }
@@ -457,8 +457,8 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
         }
 
         position.set("deviceType", parser.next());
-        position.set(Position.KEY_VERSION_FW, parser.nextHexInt(0));
-        position.set(Position.KEY_VERSION_HW, parser.nextHexInt(0));
+        position.set(Position.KEY_VERSION_FW, parser.nextHexInt());
+        position.set(Position.KEY_VERSION_HW, parser.nextHexInt());
 
         getLastLocation(position, parser.nextDateTime());
 
@@ -466,8 +466,8 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
     }
 
     private void decodeLocation(Position position, Parser parser) {
-        int hdop = parser.nextInt(0);
-        position.setValid(hdop > 0);
+        Integer hdop = parser.nextInt();
+        position.setValid(hdop == null || hdop > 0);
         position.set(Position.KEY_HDOP, hdop);
 
         position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
@@ -476,25 +476,27 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
 
         if (parser.hasNext(8)) {
             position.setValid(true);
-            position.setLongitude(parser.nextDouble(0));
-            position.setLatitude(parser.nextDouble(0));
+            position.setLongitude(parser.nextDouble());
+            position.setLatitude(parser.nextDouble());
             position.setTime(parser.nextDateTime());
         } else {
             getLastLocation(position, null);
         }
 
         if (parser.hasNext(6)) {
-            int mcc = parser.nextInt(0);
-            int mnc = parser.nextInt(0);
+            int mcc = parser.nextInt();
+            int mnc = parser.nextInt();
             if (parser.hasNext(2)) {
-                position.setNetwork(new Network(CellTower.from(mcc, mnc, parser.nextInt(0), parser.nextInt(0))));
+                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(0), parser.nextHexInt(0))));
+                position.setNetwork(new Network(CellTower.from(mcc, mnc, parser.nextHexInt(), parser.nextHexInt())));
             }
         }
 
-        position.set(Position.KEY_ODOMETER, parser.nextDouble(0) * 1000);
+        if (parser.hasNext()) {
+            position.set(Position.KEY_ODOMETER, parser.nextDouble() * 1000);
+        }
     }
 
     private Object decodeObd(Channel channel, SocketAddress remoteAddress, String sentence) {
@@ -509,16 +511,22 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
         position.set(Position.PREFIX_TEMP + 1, parser.nextInt());
         position.set(Position.KEY_FUEL_CONSUMPTION, parser.next());
         position.set("dtcsClearedDistance", parser.nextInt());
-        position.set("odbConnect", parser.nextInt(0) == 1);
+        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());
-        position.set(Position.KEY_OBD_ODOMETER, parser.nextInt(0) * 1000);
+        if (parser.hasNext()) {
+            position.set(Position.KEY_OBD_ODOMETER, parser.nextInt() * 1000);
+        }
 
         decodeLocation(position, parser);
 
-        position.set(Position.KEY_ODOMETER, parser.nextDouble(0) * 1000);
+        if (parser.hasNext()) {
+            position.set(Position.KEY_OBD_ODOMETER, (int) (parser.nextDouble() * 1000));
+        }
 
         decodeDeviceTime(position, parser);
 
@@ -649,14 +657,14 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
 
     private void decodeStatus(Position position, Parser parser) {
         if (parser.hasNext(3)) {
-            int ignition = parser.nextHexInt(0);
+            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(0));
-            position.set(Position.KEY_OUTPUT, parser.nextHexInt(0));
+            position.set(Position.KEY_INPUT, parser.nextHexInt());
+            position.set(Position.KEY_OUTPUT, parser.nextHexInt());
         }
     }
 
@@ -674,7 +682,7 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
         LinkedList<Position> positions = new LinkedList<>();
 
         String vin = parser.next();
-        int power = parser.nextInt(0);
+        Integer power = parser.nextInt();
 
         Parser itemParser = new Parser(PATTERN_LOCATION, parser.next());
         while (itemParser.find()) {
@@ -692,14 +700,18 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
 
         decodeLocation(position, parser);
 
-        if (power > 10) {
+        if (power != null && power > 10) {
             position.set(Position.KEY_POWER, power * 0.001); // only on some devices
         }
 
-        position.set(Position.KEY_ODOMETER, parser.nextDouble(0) * 1000);
+        if (parser.hasNext()) {
+            position.set(Position.KEY_ODOMETER, parser.nextDouble() * 1000);
+        }
         position.set(Position.KEY_BATTERY_LEVEL, parser.nextInt());
 
-        position.set(Position.KEY_ODOMETER, parser.nextDouble(0) * 1000);
+        if (parser.hasNext()) {
+            position.set(Position.KEY_ODOMETER, parser.nextDouble() * 1000);
+        }
         position.set(Position.KEY_HOURS, parser.next());
         position.set(Position.PREFIX_ADC + 1, parser.next());
         position.set(Position.PREFIX_ADC + 2, parser.next());
@@ -734,7 +746,7 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
 
         LinkedList<Position> positions = new LinkedList<>();
 
-        int power = parser.nextInt(0);
+        Integer power = parser.nextInt();
 
         Parser itemParser = new Parser(PATTERN_LOCATION, parser.next());
         while (itemParser.find()) {
@@ -750,8 +762,10 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
 
         decodeLocation(position, parser);
 
-        position.set(Position.KEY_POWER, power * 0.001);
-        position.set(Position.KEY_ODOMETER, parser.nextDouble(0) * 1000);
+        if (power != null) {
+            position.set(Position.KEY_POWER, power * 0.001);
+        }
+        position.set(Position.KEY_ODOMETER, parser.nextDouble() * 1000);
         position.set(Position.KEY_HOURS, parser.next());
         position.set(Position.PREFIX_ADC + 1, parser.next());
         position.set(Position.PREFIX_ADC + 2, parser.next());
@@ -773,7 +787,9 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
             for (int i = 1; i <= deviceCount; i++) {
                 index += 1; // id
                 index += 1; // type
-                position.set(Position.PREFIX_TEMP + i, (short) Integer.parseInt(data[index++], 16) * 0.0625);
+                if (!data[index++].isEmpty()) {
+                    position.set(Position.PREFIX_TEMP + i, (short) Integer.parseInt(data[index - 1], 16) * 0.0625);
+                }
             }
         }
 
@@ -813,7 +829,7 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
         decodeLocation(position, parser);
 
         position.set(Position.KEY_HOURS, parser.next());
-        position.set(Position.KEY_ODOMETER, parser.nextDouble(0) * 1000);
+        position.set(Position.KEY_ODOMETER, parser.nextDouble() * 1000);
 
         decodeDeviceTime(position, parser);
 
@@ -831,7 +847,7 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
 
         decodeLocation(position, parser);
 
-        position.set(Position.KEY_ODOMETER, parser.nextDouble(0) * 1000);
+        position.set(Position.KEY_ODOMETER, parser.nextDouble() * 1000);
 
         decodeDeviceTime(position, parser);
 
@@ -849,7 +865,7 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
 
         Network network = new Network();
 
-        parser.nextInt(0); // count
+        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:");
@@ -859,7 +875,7 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
 
         position.setNetwork(network);
 
-        position.set(Position.KEY_BATTERY_LEVEL, parser.nextInt(0));
+        position.set(Position.KEY_BATTERY_LEVEL, parser.nextInt());
 
         return position;
     }
@@ -897,7 +913,7 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        int reportType = parser.nextInt(0);
+        int reportType = parser.nextInt();
         if (type.equals("NMR")) {
             position.set(Position.KEY_MOTION, reportType == 1);
         } else if (type.equals("SOS")) {
@@ -906,10 +922,14 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
 
         decodeLocation(position, parser);
 
-        position.set(Position.KEY_ODOMETER, parser.nextDouble(0) * 1000);
-        position.set(Position.KEY_BATTERY_LEVEL, parser.nextInt(0));
+        if (parser.hasNext()) {
+            position.set(Position.KEY_ODOMETER, parser.nextDouble() * 1000);
+        }
+        position.set(Position.KEY_BATTERY_LEVEL, parser.nextInt());
 
-        position.set(Position.KEY_ODOMETER, parser.nextDouble(0) * 1000);
+        if (parser.hasNext()) {
+            position.set(Position.KEY_ODOMETER, parser.nextDouble() * 1000);
+        }
 
         decodeDeviceTime(position, parser);
 
@@ -927,7 +947,7 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
-        int hdop = parser.nextInt(0);
+        int hdop = parser.nextInt();
         position.setValid(hdop > 0);
         position.set(Position.KEY_HDOP, hdop);
 
@@ -936,8 +956,8 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
         position.setAltitude(parser.nextDouble(0));
 
         if (parser.hasNext(2)) {
-            position.setLongitude(parser.nextDouble(0));
-            position.setLatitude(parser.nextDouble(0));
+            position.setLongitude(parser.nextDouble());
+            position.setLatitude(parser.nextDouble());
         } else {
             getLastLocation(position, null);
         }
@@ -948,7 +968,7 @@ public class Gl200TextProtocolDecoder extends BaseProtocolDecoder {
 
         if (parser.hasNext(4)) {
             position.setNetwork(new Network(CellTower.from(
-                    parser.nextInt(0), parser.nextInt(0), parser.nextHexInt(0), parser.nextHexInt(0))));
+                    parser.nextInt(), parser.nextInt(), parser.nextHexInt(), parser.nextHexInt())));
         }
 
         decodeDeviceTime(position, parser);
diff --git a/src/org/traccar/protocol/HuabaoProtocolEncoder.java b/src/org/traccar/protocol/HuabaoProtocolEncoder.java
index 7d6f0510d..d1889bf5e 100644
--- a/src/org/traccar/protocol/HuabaoProtocolEncoder.java
+++ b/src/org/traccar/protocol/HuabaoProtocolEncoder.java
@@ -18,10 +18,10 @@ package org.traccar.protocol;
 import org.jboss.netty.buffer.ChannelBuffer;
 import org.jboss.netty.buffer.ChannelBuffers;
 import org.traccar.BaseProtocolEncoder;
+import org.traccar.helper.DataConverter;
 import org.traccar.helper.Log;
 import org.traccar.model.Command;
 
-import javax.xml.bind.DatatypeConverter;
 import java.text.SimpleDateFormat;
 import java.util.Date;
 
@@ -31,10 +31,10 @@ public class HuabaoProtocolEncoder extends BaseProtocolEncoder {
     protected Object encodeCommand(Command command) {
 
         ChannelBuffer id =  ChannelBuffers.wrappedBuffer(
-                DatatypeConverter.parseHexBinary(getUniqueId(command.getDeviceId())));
+                DataConverter.parseHex(getUniqueId(command.getDeviceId())));
 
         ChannelBuffer data = ChannelBuffers.dynamicBuffer();
-        byte[] time = DatatypeConverter.parseHexBinary(new SimpleDateFormat("yyMMddHHmmss").format(new Date()));
+        byte[] time = DataConverter.parseHex(new SimpleDateFormat("yyMMddHHmmss").format(new Date()));
 
         switch (command.getType()) {
             case Command.TYPE_ENGINE_STOP:
diff --git a/src/org/traccar/protocol/MeiligaoProtocolEncoder.java b/src/org/traccar/protocol/MeiligaoProtocolEncoder.java
index 2e0a1e84c..340d947e3 100644
--- a/src/org/traccar/protocol/MeiligaoProtocolEncoder.java
+++ b/src/org/traccar/protocol/MeiligaoProtocolEncoder.java
@@ -19,10 +19,10 @@ import org.jboss.netty.buffer.ChannelBuffer;
 import org.jboss.netty.buffer.ChannelBuffers;
 import org.traccar.BaseProtocolEncoder;
 import org.traccar.helper.Checksum;
+import org.traccar.helper.DataConverter;
 import org.traccar.helper.Log;
 import org.traccar.model.Command;
 
-import javax.xml.bind.DatatypeConverter;
 import java.nio.charset.StandardCharsets;
 import java.util.TimeZone;
 
@@ -44,7 +44,7 @@ public class MeiligaoProtocolEncoder extends BaseProtocolEncoder {
 
         buf.writeShort(2 + 2 + 7 + 2 + content.readableBytes() + 2 + 2); // message length
 
-        buf.writeBytes(DatatypeConverter.parseHexBinary((getUniqueId(deviceId) + "FFFFFFFFFFFFFF").substring(0, 14)));
+        buf.writeBytes(DataConverter.parseHex((getUniqueId(deviceId) + "FFFFFFFFFFFFFF").substring(0, 14)));
 
         buf.writeShort(type);
 
diff --git a/src/org/traccar/protocol/RuptelaProtocolDecoder.java b/src/org/traccar/protocol/RuptelaProtocolDecoder.java
index 87ee8246a..7b11cc5c3 100644
--- a/src/org/traccar/protocol/RuptelaProtocolDecoder.java
+++ b/src/org/traccar/protocol/RuptelaProtocolDecoder.java
@@ -20,10 +20,10 @@ import org.jboss.netty.buffer.ChannelBuffers;
 import org.jboss.netty.channel.Channel;
 import org.traccar.BaseProtocolDecoder;
 import org.traccar.DeviceSession;
+import org.traccar.helper.DataConverter;
 import org.traccar.helper.UnitsConverter;
 import org.traccar.model.Position;
 
-import javax.xml.bind.DatatypeConverter;
 import java.net.SocketAddress;
 import java.nio.charset.StandardCharsets;
 import java.util.Date;
@@ -196,7 +196,7 @@ public class RuptelaProtocolDecoder extends BaseProtocolDecoder {
             }
 
             if (channel != null) {
-                channel.write(ChannelBuffers.wrappedBuffer(DatatypeConverter.parseHexBinary("0002640113bc")));
+                channel.write(ChannelBuffers.wrappedBuffer(DataConverter.parseHex("0002640113bc")));
             }
 
             return positions;
@@ -229,7 +229,7 @@ public class RuptelaProtocolDecoder extends BaseProtocolDecoder {
             }
 
             if (channel != null) {
-                channel.write(ChannelBuffers.wrappedBuffer(DatatypeConverter.parseHexBinary("00026d01c4a4")));
+                channel.write(ChannelBuffers.wrappedBuffer(DataConverter.parseHex("00026d01c4a4")));
             }
 
             return positions;
diff --git a/src/org/traccar/protocol/SigfoxProtocolDecoder.java b/src/org/traccar/protocol/SigfoxProtocolDecoder.java
index 65ab2cc55..b454e00fa 100644
--- a/src/org/traccar/protocol/SigfoxProtocolDecoder.java
+++ b/src/org/traccar/protocol/SigfoxProtocolDecoder.java
@@ -22,12 +22,12 @@ import org.jboss.netty.handler.codec.http.HttpRequest;
 import org.jboss.netty.handler.codec.http.HttpResponseStatus;
 import org.traccar.BaseHttpProtocolDecoder;
 import org.traccar.DeviceSession;
+import org.traccar.helper.DataConverter;
 import org.traccar.helper.UnitsConverter;
 import org.traccar.model.Position;
 
 import javax.json.Json;
 import javax.json.JsonObject;
-import javax.xml.bind.DatatypeConverter;
 import java.io.StringReader;
 import java.net.SocketAddress;
 import java.net.URLDecoder;
@@ -61,7 +61,7 @@ public class SigfoxProtocolDecoder extends BaseHttpProtocolDecoder {
         position.setTime(new Date(json.getInt("time") * 1000L));
 
         ChannelBuffer buf = ChannelBuffers.wrappedBuffer(
-                ByteOrder.LITTLE_ENDIAN, DatatypeConverter.parseHexBinary(json.getString("data")));
+                ByteOrder.LITTLE_ENDIAN, DataConverter.parseHex(json.getString("data")));
 
         int type = buf.readUnsignedByte() >> 4;
         if (type == 0) {
diff --git a/src/org/traccar/protocol/T55ProtocolDecoder.java b/src/org/traccar/protocol/T55ProtocolDecoder.java
index dbc467993..be3cb5f67 100644
--- a/src/org/traccar/protocol/T55ProtocolDecoder.java
+++ b/src/org/traccar/protocol/T55ProtocolDecoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012 - 2017 Anton Tananaev (anton@traccar.org)
+ * 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.
@@ -250,9 +250,11 @@ public class T55ProtocolDecoder extends BaseProtocolDecoder {
         } else if (sentence.startsWith("$PCPTI")) {
             getDeviceSession(channel, remoteAddress, sentence.substring(7, sentence.indexOf(",", 7)));
         } else if (sentence.startsWith("IMEI")) {
-            getDeviceSession(channel, remoteAddress, sentence.substring(5, sentence.length()));
+            getDeviceSession(channel, remoteAddress, sentence.substring(5));
+        } else if (sentence.startsWith("$IMEI")) {
+            getDeviceSession(channel, remoteAddress, sentence.substring(6));
         } else if (sentence.startsWith("$GPFID")) {
-            deviceSession = getDeviceSession(channel, remoteAddress, sentence.substring(7, sentence.length()));
+            deviceSession = getDeviceSession(channel, remoteAddress, sentence.substring(7));
             if (deviceSession != null && position != null) {
                 Position position = this.position;
                 position.setDeviceId(deviceSession.getDeviceId());
diff --git a/src/org/traccar/protocol/T800xProtocolEncoder.java b/src/org/traccar/protocol/T800xProtocolEncoder.java
index 6ed5dbccd..038a5e51a 100644
--- a/src/org/traccar/protocol/T800xProtocolEncoder.java
+++ b/src/org/traccar/protocol/T800xProtocolEncoder.java
@@ -18,10 +18,10 @@ package org.traccar.protocol;
 import org.jboss.netty.buffer.ChannelBuffer;
 import org.jboss.netty.buffer.ChannelBuffers;
 import org.traccar.BaseProtocolEncoder;
+import org.traccar.helper.DataConverter;
 import org.traccar.helper.Log;
 import org.traccar.model.Command;
 
-import javax.xml.bind.DatatypeConverter;
 import java.nio.charset.StandardCharsets;
 
 public class T800xProtocolEncoder extends BaseProtocolEncoder {
@@ -39,7 +39,7 @@ public class T800xProtocolEncoder extends BaseProtocolEncoder {
         buf.writeByte(T800xProtocolDecoder.MSG_COMMAND);
         buf.writeShort(7 + 8 + 1 + content.length());
         buf.writeShort(1); // serial number
-        buf.writeBytes(DatatypeConverter.parseHexBinary("0" + getUniqueId(command.getDeviceId())));
+        buf.writeBytes(DataConverter.parseHex("0" + getUniqueId(command.getDeviceId())));
         buf.writeByte(MODE_SETTING);
         buf.writeBytes(content.getBytes(StandardCharsets.US_ASCII));
 
diff --git a/src/org/traccar/protocol/TaipProtocolDecoder.java b/src/org/traccar/protocol/TaipProtocolDecoder.java
index 9555d19e9..a7aa9dd96 100644
--- a/src/org/traccar/protocol/TaipProtocolDecoder.java
+++ b/src/org/traccar/protocol/TaipProtocolDecoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2013 - 2017 Anton Tananaev (anton@traccar.org)
+ * 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.
@@ -62,16 +62,23 @@ public class TaipProtocolDecoder extends BaseProtocolDecoder {
             .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("[23]")                      // fix mode
+            .number("([023])")                   // fix mode
             .number("(dd)")                      // pdop
             .number("dd")                        // satellites
-            .number("xxxx")                      // seconds from last
+            .number("xxxx")                      // data age
             .number("[01]")                      // modem power
             .number("[0-5]")                     // gsm status
             .number("(dd)")                      // rssi
@@ -81,6 +88,7 @@ public class TaipProtocolDecoder extends BaseProtocolDecoder {
             .number("xx")                        // seconds from last
             .groupEnd("?")
             .groupEnd("?")
+            .groupEnd()
             .any()
             .compile();
 
@@ -116,6 +124,7 @@ public class TaipProtocolDecoder extends BaseProtocolDecoder {
 
         Position position = new Position(getProtocolName());
 
+        Boolean valid = null;
         Integer event = null;
 
         if (parser.hasNext(3)) {
@@ -129,27 +138,6 @@ public class TaipProtocolDecoder extends BaseProtocolDecoder {
             event = parser.nextInt();
         }
 
-        if (event != null) {
-            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:
-                    position.set(Position.KEY_EVENT, event);
-                    break;
-            }
-        }
-
         if (parser.hasNext(6)) {
             position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
         }
@@ -167,6 +155,15 @@ public class TaipProtocolDecoder extends BaseProtocolDecoder {
         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));
@@ -174,13 +171,35 @@ public class TaipProtocolDecoder extends BaseProtocolDecoder {
         }
 
         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(true);
+        position.setValid(valid != null ? valid : true);
+
+        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(';');
@@ -250,14 +269,13 @@ public class TaipProtocolDecoder extends BaseProtocolDecoder {
         if (deviceSession != null) {
             if (channel != null) {
                 if (messageIndex != null) {
-                    String response = ">ACK;" + messageIndex + ";ID=" + uniqueId + ";*";
+                    String response = ">ACK;ID=" + uniqueId + ";" + messageIndex + ";*";
                     response += String.format("%02X", Checksum.xor(response)) + "<";
                     channel.write(response, remoteAddress);
                 } else {
                     channel.write(uniqueId, remoteAddress);
                 }
             }
-
             return position;
         }
 
diff --git a/src/org/traccar/protocol/TeltonikaProtocolDecoder.java b/src/org/traccar/protocol/TeltonikaProtocolDecoder.java
index 9e249247a..d2069e6c9 100644
--- a/src/org/traccar/protocol/TeltonikaProtocolDecoder.java
+++ b/src/org/traccar/protocol/TeltonikaProtocolDecoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2013 - 2017 Anton Tananaev (anton@traccar.org)
+ * 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.
@@ -133,7 +133,10 @@ public class TeltonikaProtocolDecoder extends BaseProtocolDecoder {
                 position.set(Position.PREFIX_TEMP + 3, readValue(buf, length, true) * 0.1);
                 break;
             case 78:
-                position.set(Position.KEY_DRIVER_UNIQUE_ID, String.format("%016X", readValue(buf, length, false)));
+                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));
diff --git a/src/org/traccar/protocol/WatchProtocolDecoder.java b/src/org/traccar/protocol/WatchProtocolDecoder.java
index 1dd07a3f7..c57279296 100644
--- a/src/org/traccar/protocol/WatchProtocolDecoder.java
+++ b/src/org/traccar/protocol/WatchProtocolDecoder.java
@@ -97,8 +97,38 @@ public class WatchProtocolDecoder extends BaseProtocolDecoder {
         return null;
     }
 
-    private void decodeTail(Position position, String data) {
-        String[] values = data.split(",");
+    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();
@@ -127,6 +157,8 @@ public class WatchProtocolDecoder extends BaseProtocolDecoder {
         if (network.getCellTowers() != null || network.getWifiAccessPoints() != null) {
             position.setNetwork(network);
         }
+
+        return position;
     }
 
     @Override
@@ -171,7 +203,11 @@ public class WatchProtocolDecoder extends BaseProtocolDecoder {
             buf.readerIndex(contentIndex + 1);
         }
 
-        if (type.equals("LK")) {
+        if (type.equals("INIT")) {
+
+            sendResponse(channel, manufacturer, id, index, "INIT,1");
+
+        } else if (type.equals("LK")) {
 
             sendResponse(channel, manufacturer, id, index, "LK");
 
@@ -196,44 +232,13 @@ public class WatchProtocolDecoder extends BaseProtocolDecoder {
                 sendResponse(channel, manufacturer, id, index, "AL");
             }
 
-            Parser parser = new Parser(PATTERN_POSITION, buf.toString(StandardCharsets.US_ASCII));
-            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);
-            }
-
-            decodeTail(position, parser.next());
-
-            return position;
+            return decodePosition(deviceSession, buf.toString(StandardCharsets.US_ASCII));
 
         } else if (type.equals("TKQ")) {
 
             sendResponse(channel, manufacturer, id, index, "TKQ");
 
-        } else if (type.equals("PULSE") || type.equals("heart")) {
+        } else if (type.equals("PULSE") || type.equals("heart") || type.equals("bphrt")) {
 
             if (buf.readable()) {
 
@@ -242,10 +247,14 @@ public class WatchProtocolDecoder extends BaseProtocolDecoder {
 
                 getLastLocation(position, new Date());
 
-                position.setValid(false);
-                String pulse = buf.toString(StandardCharsets.US_ASCII);
-                position.set("pulse", pulse);
-                position.set(Position.KEY_RESULT, pulse);
+                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("pulse", values[valueIndex]);
 
                 return position;
 
diff --git a/src/org/traccar/protocol/WatchProtocolEncoder.java b/src/org/traccar/protocol/WatchProtocolEncoder.java
index d2d3b52d1..5206fbf10 100644
--- a/src/org/traccar/protocol/WatchProtocolEncoder.java
+++ b/src/org/traccar/protocol/WatchProtocolEncoder.java
@@ -16,10 +16,10 @@
 package org.traccar.protocol;
 
 import org.traccar.StringProtocolEncoder;
+import org.traccar.helper.DataConverter;
 import org.traccar.helper.Log;
 import org.traccar.model.Command;
 
-import javax.xml.bind.DatatypeConverter;
 import java.nio.charset.StandardCharsets;
 import java.text.DecimalFormat;
 import java.text.DecimalFormatSymbols;
@@ -68,7 +68,7 @@ public class WatchProtocolEncoder extends StringProtocolEncoder implements Strin
     }
 
     private String getBinaryData(Command command) {
-        byte[] data = DatatypeConverter.parseHexBinary(command.getString(Command.KEY_DATA));
+        byte[] data = DataConverter.parseHex(command.getString(Command.KEY_DATA));
 
         int encodedLength = data.length;
         for (byte b : data) {
diff --git a/src/org/traccar/protocol/XirgoProtocolDecoder.java b/src/org/traccar/protocol/XirgoProtocolDecoder.java
index 10dd298fd..461503af1 100644
--- a/src/org/traccar/protocol/XirgoProtocolDecoder.java
+++ b/src/org/traccar/protocol/XirgoProtocolDecoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2015 - 2017 Anton Tananaev (anton@traccar.org)
+ * 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.
@@ -95,6 +95,71 @@ public class XirgoProtocolDecoder extends BaseProtocolDecoder {
             .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 {
@@ -133,7 +198,7 @@ public class XirgoProtocolDecoder extends BaseProtocolDecoder {
         }
         position.setDeviceId(deviceSession.getDeviceId());
 
-        position.set(Position.KEY_EVENT, parser.next());
+        decodeEvent(position, parser.nextInt());
 
         position.setTime(parser.nextDateTime());
 
diff --git a/src/org/traccar/protocol/Xt2400ProtocolDecoder.java b/src/org/traccar/protocol/Xt2400ProtocolDecoder.java
index 72be473c1..1be943e98 100644
--- a/src/org/traccar/protocol/Xt2400ProtocolDecoder.java
+++ b/src/org/traccar/protocol/Xt2400ProtocolDecoder.java
@@ -20,10 +20,10 @@ import org.jboss.netty.channel.Channel;
 import org.traccar.BaseProtocolDecoder;
 import org.traccar.Context;
 import org.traccar.DeviceSession;
+import org.traccar.helper.DataConverter;
 import org.traccar.helper.UnitsConverter;
 import org.traccar.model.Position;
 
-import javax.xml.bind.DatatypeConverter;
 import java.net.SocketAddress;
 import java.nio.charset.StandardCharsets;
 import java.util.Date;
@@ -95,7 +95,7 @@ public class Xt2400ProtocolDecoder extends BaseProtocolDecoder {
         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), DatatypeConverter.parseHexBinary(matcher.group(2)));
+            formats.put(Short.parseShort(matcher.group(1), 16), DataConverter.parseHex(matcher.group(2)));
         }
     }