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/*
* Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.traccar.protocol;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufUtil;
import io.netty.channel.Channel;
import org.traccar.BaseProtocolDecoder;
import org.traccar.DeviceSession;
import org.traccar.Protocol;
import org.traccar.helper.BcdUtil;
import org.traccar.helper.BitUtil;
import org.traccar.helper.DateBuilder;
import org.traccar.helper.UnitsConverter;
import org.traccar.model.Position;
import java.net.SocketAddress;
import java.util.Arrays;
import java.util.Date;
public class Vt200ProtocolDecoder extends BaseProtocolDecoder {
public Vt200ProtocolDecoder(Protocol protocol) {
super(protocol);
}
private static double decodeCoordinate(int value) {
int degrees = value / 1000000;
int minutes = value % 1000000;
return degrees + minutes * 0.0001 / 60;
}
protected Date decodeDate(ByteBuf buf) {
DateBuilder dateBuilder = new DateBuilder()
.setDateReverse(BcdUtil.readInteger(buf, 2), BcdUtil.readInteger(buf, 2), BcdUtil.readInteger(buf, 2))
.setTime(BcdUtil.readInteger(buf, 2), BcdUtil.readInteger(buf, 2), BcdUtil.readInteger(buf, 2));
return dateBuilder.getDate();
}
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
ByteBuf buf = (ByteBuf) msg;
buf.skipBytes(1); // header
String id = ByteBufUtil.hexDump(buf.readSlice(6));
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, id);
if (deviceSession == null) {
return null;
}
int type = buf.readUnsignedShort();
buf.readUnsignedShort(); // length
if (type == 0x2086 || type == 0x2084 || type == 0x2082) {
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
buf.readUnsignedByte(); // data type
buf.readUnsignedShort(); // trip id
position.setTime(decodeDate(buf));
position.setLatitude(decodeCoordinate(BcdUtil.readInteger(buf, 8)));
position.setLongitude(decodeCoordinate(BcdUtil.readInteger(buf, 9)));
int flags = buf.readUnsignedByte();
position.setValid(BitUtil.check(flags, 0));
if (!BitUtil.check(flags, 1)) {
position.setLatitude(-position.getLatitude());
}
if (!BitUtil.check(flags, 2)) {
position.setLongitude(-position.getLongitude());
}
position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte()));
position.setCourse(buf.readUnsignedByte() * 2);
position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
position.set(Position.KEY_RSSI, buf.readUnsignedByte());
position.set(Position.KEY_ODOMETER, buf.readUnsignedInt() * 1000);
position.set(Position.KEY_STATUS, buf.readUnsignedInt());
// additional data
return position;
} else if (type == 0x3088) {
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
getLastLocation(position, null);
buf.readUnsignedShort(); // trip id
buf.skipBytes(8); // imei
buf.skipBytes(8); // imsi
position.set("tripStart", decodeDate(buf).getTime());
position.set("tripEnd", decodeDate(buf).getTime());
position.set("drivingTime", buf.readUnsignedShort());
position.set(Position.KEY_FUEL_CONSUMPTION, buf.readUnsignedInt());
position.set(Position.KEY_ODOMETER_TRIP, buf.readUnsignedInt());
position.set("maxSpeed", UnitsConverter.knotsFromKph(buf.readUnsignedByte()));
position.set("maxRpm", buf.readUnsignedShort());
position.set("maxTemp", buf.readUnsignedByte() - 40);
position.set("hardAccelerationCount", buf.readUnsignedByte());
position.set("hardBrakingCount", buf.readUnsignedByte());
for (String speedType : Arrays.asList("over", "high", "normal", "low")) {
position.set(speedType + "SpeedTime", buf.readUnsignedShort());
position.set(speedType + "SpeedDistance", buf.readUnsignedInt());
position.set(speedType + "SpeedFuel", buf.readUnsignedInt());
}
position.set("idleTime", buf.readUnsignedShort());
position.set("idleFuel", buf.readUnsignedInt());
position.set("hardCorneringCount", buf.readUnsignedByte());
position.set("overspeedCount", buf.readUnsignedByte());
position.set("overheatCount", buf.readUnsignedShort());
position.set("laneChangeCount", buf.readUnsignedByte());
position.set("emergencyRefueling", buf.readUnsignedByte());
return position;
}
return null;
}
}
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