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/*
* Copyright 2020 - 2023 Anton Tananaev (anton@traccar.org)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either 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.handler.codec.mqtt.MqttPublishMessage;
import org.traccar.BaseMqttProtocolDecoder;
import org.traccar.Protocol;
import org.traccar.helper.UnitsConverter;
import org.traccar.model.Position;
import org.traccar.session.DeviceSession;
import java.nio.charset.StandardCharsets;
import java.util.Date;
import java.util.LinkedList;
import java.util.List;
public class IotmProtocolDecoder extends BaseMqttProtocolDecoder {
public IotmProtocolDecoder(Protocol protocol) {
super(protocol);
}
private Object readValue(ByteBuf buf, int sensorType) {
switch (sensorType) {
case 0:
return false;
case 1:
return true;
case 3:
return 0;
case 4:
return buf.readUnsignedByte();
case 5:
return buf.readUnsignedShortLE();
case 6:
return buf.readUnsignedIntLE();
case 7:
case 11:
return buf.readLongLE();
case 8:
return buf.readByte();
case 9:
return buf.readShortLE();
case 10:
return buf.readIntLE();
case 12:
return buf.readFloatLE();
case 13:
return buf.readDoubleLE();
case 32:
return buf.readCharSequence(buf.readUnsignedByte(), StandardCharsets.US_ASCII).toString();
case 33:
return ByteBufUtil.hexDump(buf.readSlice(buf.readUnsignedByte()));
case 64:
return buf.readCharSequence(buf.readUnsignedShortLE(), StandardCharsets.US_ASCII).toString();
case 65:
return ByteBufUtil.hexDump(buf.readSlice(buf.readUnsignedShortLE()));
case 2:
default:
return null;
}
}
private void decodeSensor(Position position, ByteBuf record, int sensorType, int sensorId) {
String key;
switch (sensorId) {
case 0x0002:
position.set(Position.KEY_MOTION, sensorType > 0);
break;
case 0x0008:
case 0x009B:
if (sensorType > 0) {
position.set(Position.KEY_ALARM, Position.ALARM_JAMMING);
}
break;
case 0x0010:
case 0x0011:
case 0x0012:
case 0x0013:
case 0x0014:
case 0x0015:
key = Position.PREFIX_IN + (sensorId - 0x0010 + 2);
position.set(key, sensorType > 0);
break;
case 0x0062:
position.set("doorFL", sensorType > 0);
break;
case 0x0063:
position.set("doorFR", sensorType > 0);
break;
case 0x0064:
position.set("doorRL", sensorType > 0);
break;
case 0x0065:
position.set("doorRR", sensorType > 0);
break;
case 0x001E:
position.set("buttonPresent", sensorType > 0);
break;
case 0x006D:
position.set(Position.KEY_IGNITION, sensorType > 0);
break;
case 0x008B:
position.set("handBrake", sensorType > 0);
break;
case 0x008C:
position.set("footBrake", sensorType > 0);
break;
case 0x0094:
case 0x0095:
case 0x0096:
key = Position.PREFIX_OUT + (sensorId - 0x0094 + 1);
position.set(key, sensorType > 0);
break;
case 0x009A:
position.set(Position.PREFIX_OUT + 4, sensorType > 0);
break;
case 0x2000:
position.set(Position.KEY_OBD_SPEED, record.readUnsignedByte());
break;
case 0x2001:
position.set(Position.KEY_SATELLITES, record.readUnsignedByte());
break;
case 0x2006:
position.set(Position.KEY_THROTTLE, record.readUnsignedByte());
break;
case 0x2007:
position.set(Position.KEY_FUEL_LEVEL, record.readUnsignedByte());
break;
case 0x2008:
position.set(Position.KEY_COOLANT_TEMP, record.readUnsignedByte());
break;
case 0x2009:
position.set("fuel2", record.readUnsignedByte());
break;
case 0x200A:
position.set(Position.KEY_ENGINE_LOAD, record.readUnsignedByte());
break;
case 0x2041:
position.set(Position.KEY_BATTERY_LEVEL, record.readUnsignedByte());
break;
case 0x3000:
position.set(Position.KEY_POWER, record.readUnsignedShortLE() * 0.001);
break;
case 0x3001:
case 0x3002:
case 0x3003:
key = Position.PREFIX_ADC + (0x3003 - sensorId + 3);
position.set(key, record.readUnsignedShortLE() * 0.001);
break;
case 0x3004:
position.set(Position.KEY_BATTERY, record.readUnsignedShortLE() * 0.001);
break;
case 0x300C:
position.set(Position.KEY_RPM, record.readUnsignedShortLE());
break;
case 0x3021:
position.set(Position.KEY_FUEL_CONSUMPTION, record.readUnsignedShortLE() * 0.05);
break;
case 0x3037:
position.set("cargoWeight", record.readUnsignedShortLE() * 2);
break;
case 0x4001:
position.set(Position.KEY_FUEL_USED, record.readUnsignedIntLE());
break;
case 0x4002:
position.set(Position.KEY_HOURS, record.readUnsignedIntLE());
break;
case 0x4003:
position.set(Position.KEY_ODOMETER, record.readUnsignedIntLE() * 5);
break;
case 0x4063:
position.set(Position.KEY_AXLE_WEIGHT, record.readUnsignedIntLE());
break;
case 0x5000:
position.set(Position.KEY_DRIVER_UNIQUE_ID, String.valueOf(record.readLongLE()));
break;
case 0x5004:
case 0x5005:
case 0x5006:
case 0x5007:
key = Position.PREFIX_TEMP + (sensorId - 0x5004 + 1);
position.set(key, record.readLongLE());
break;
case 0x500D:
position.set("trailerId", String.valueOf(record.readLongLE()));
break;
case 0xA000:
position.set(Position.KEY_DEVICE_TEMP, record.readFloatLE());
break;
case 0xA001:
position.set(Position.KEY_ACCELERATION, record.readFloatLE());
break;
case 0xA002:
position.set("cornering", record.readFloatLE());
break;
case 0xA017:
case 0xA018:
case 0xA019:
case 0xA01A:
key = Position.PREFIX_TEMP + (sensorId - 0xA017 + 1);
position.set(key, record.readFloatLE());
break;
case 0xB002:
position.set(Position.KEY_OBD_ODOMETER, record.readDoubleLE());
break;
default:
key = Position.PREFIX_IO + sensorId;
position.getAttributes().put(key, readValue(record, sensorType));
break;
}
}
@Override
protected Object decode(
DeviceSession deviceSession, MqttPublishMessage message) throws Exception {
List<Position> positions = new LinkedList<>();
ByteBuf buf = message.payload();
buf.readUnsignedByte(); // structure version
while (buf.readableBytes() > 1) {
int type = buf.readUnsignedByte();
int length = buf.readUnsignedShortLE();
ByteBuf record = buf.readSlice(length);
if (type == 1) {
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
position.setTime(new Date(record.readUnsignedIntLE() * 1000));
while (record.readableBytes() > 0) {
int sensorType = record.readUnsignedByte();
int sensorId = record.readUnsignedShortLE();
if (sensorType == 14) {
position.setValid(true);
position.setLatitude(record.readFloatLE());
position.setLongitude(record.readFloatLE());
position.setSpeed(UnitsConverter.knotsFromKph(record.readUnsignedShortLE()));
position.set(Position.KEY_HDOP, record.readUnsignedByte());
position.set(Position.KEY_SATELLITES, record.readUnsignedByte());
position.setCourse(record.readUnsignedShortLE());
position.setAltitude(record.readShortLE());
} else {
if (sensorType == 3) {
continue;
}
decodeSensor(position, record, sensorType, sensorId);
}
}
positions.add(position);
} else if (type == 3) {
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
getLastLocation(position, new Date(record.readUnsignedIntLE() * 1000));
record.readUnsignedByte(); // function identifier
position.set(Position.KEY_EVENT, record.readUnsignedByte());
positions.add(position);
}
}
buf.readUnsignedByte(); // checksum
return positions.isEmpty() ? null : positions;
}
}
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