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-rw-r--r--src/org/traccar/protocol/Vt200ProtocolDecoder.java105
1 files changed, 105 insertions, 0 deletions
diff --git a/src/org/traccar/protocol/Vt200ProtocolDecoder.java b/src/org/traccar/protocol/Vt200ProtocolDecoder.java
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index 000000000..b9af11b43
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+++ b/src/org/traccar/protocol/Vt200ProtocolDecoder.java
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+/*
+ * 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.jboss.netty.buffer.ChannelBuffer;
+import org.jboss.netty.buffer.ChannelBuffers;
+import org.jboss.netty.channel.Channel;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+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;
+
+public class Vt200ProtocolDecoder extends BaseProtocolDecoder {
+
+ public Vt200ProtocolDecoder(Vt200Protocol protocol) {
+ super(protocol);
+ }
+
+ private static double decodeCoordinate(int value) {
+ int degrees = value / 1000000;
+ int minutes = value % 1000000;
+ return degrees + minutes * 0.0001 / 60;
+ }
+
+ @Override
+ protected Object decode(
+ Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+ ChannelBuffer buf = (ChannelBuffer) msg;
+
+ buf.skipBytes(1); // header
+
+ String id = ChannelBuffers.hexDump(buf.readBytes(6));
+ DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, id);
+ if (deviceSession == null) {
+ return null;
+ }
+
+ int type = buf.readUnsignedShort();
+ buf.readUnsignedShort(); // length
+
+ if (type == 0x2084) {
+
+ Position position = new Position();
+ position.setProtocol(getProtocolName());
+ position.setDeviceId(deviceSession.getDeviceId());
+
+ buf.readUnsignedByte(); // data type
+ buf.readUnsignedShort(); // trip id
+
+ DateBuilder dateBuilder = new DateBuilder();
+ dateBuilder.setDateReverse(
+ BcdUtil.readInteger(buf, 2), BcdUtil.readInteger(buf, 2), BcdUtil.readInteger(buf, 2));
+ dateBuilder.setTime(
+ BcdUtil.readInteger(buf, 2), BcdUtil.readInteger(buf, 2), BcdUtil.readInteger(buf, 2));
+ position.setTime(dateBuilder.getDate());
+
+ 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, 1)) {
+ 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;
+
+ }
+
+ return null;
+ }
+
+}