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/*
* Copyright 2019 Anton Tananaev (anton@traccar.org)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.traccar.protocol;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufUtil;
import io.netty.channel.Channel;
import org.traccar.BaseProtocolDecoder;
import org.traccar.DeviceSession;
import org.traccar.Protocol;
import org.traccar.helper.BitUtil;
import org.traccar.helper.DateBuilder;
import org.traccar.helper.UnitsConverter;
import org.traccar.model.Position;
import java.net.SocketAddress;
public class SolarPoweredProtocolDecoder extends BaseProtocolDecoder {
public SolarPoweredProtocolDecoder(Protocol protocol) {
super(protocol);
}
public static final int MSG_ACTIVE_REPORTING = 0x11;
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
ByteBuf buf = (ByteBuf) msg;
buf.readUnsignedByte(); // start marker
String imei = ByteBufUtil.hexDump(buf.readSlice(8)).substring(0, 15);
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
if (deviceSession == null) {
return null;
}
int type = buf.readUnsignedByte();
buf.readUnsignedShort(); // attributes
if (type == MSG_ACTIVE_REPORTING) {
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
while (buf.readableBytes() > 2) {
int tag = buf.readUnsignedByte();
int length = buf.readUnsignedByte();
switch (tag) {
case 0x81:
int status = buf.readUnsignedByte();
DateBuilder dateBuilder = new DateBuilder()
.setDate(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte())
.setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte());
position.setTime(dateBuilder.getDate());
position.setLatitude(buf.readUnsignedInt() * 0.000001);
if (BitUtil.check(status, 3)) {
position.setLatitude(-position.getLatitude());
}
position.setLongitude(buf.readUnsignedInt() * 0.000001);
if (BitUtil.check(status, 3)) {
position.setLongitude(-position.getLongitude());
}
position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte()));
position.set(Position.KEY_DEVICE_TEMP, (int) buf.readByte());
position.set(Position.KEY_BATTERY, buf.readUnsignedByte() * 0.02);
position.setCourse(buf.readUnsignedByte());
break;
default:
buf.skipBytes(length);
break;
}
}
return position;
}
return null;
}
}
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