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/*
* 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 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.Parser;
import org.traccar.helper.PatternBuilder;
import org.traccar.model.Position;
import java.net.SocketAddress;
import java.nio.charset.StandardCharsets;
import java.util.regex.Pattern;
public class TekProtocolDecoder extends BaseProtocolDecoder {
public TekProtocolDecoder(Protocol protocol) {
super(protocol);
}
private static final Pattern PATTERN = new PatternBuilder()
.number(",d+,")
.number("(dd)(dd)(dd).d,") // time (hhmmss)
.number("(dd)(dd.d+)") // latitude
.expression("([NS]),")
.number("(ddd)(dd.d+)") // longitude
.expression("([EW]),")
.number("(d+.d+),") // hdop
.number("(d+.d+),") // altitude
.number("(d+),") // fix mode
.number("(d+.d+),") // course
.number("d+.d+,") // speed km
.number("(d+.d+),") // speed kn
.number("(dd)(dd)(dd),") // date (ddmmyy)
.number("(d+),") // satellites
.any()
.compile();
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
ByteBuf buf = (ByteBuf) msg;
buf.readUnsignedByte(); // product type
buf.readUnsignedByte(); // hardware version
buf.readUnsignedByte(); // firmware version
buf.readUnsignedByte(); // contact reason
buf.readUnsignedByte(); // alarm / status
buf.readUnsignedByte(); // rssi
buf.readUnsignedByte(); // battery / status
String imei = ByteBufUtil.hexDump(buf.readSlice(8)).substring(1);
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
if (deviceSession == null) {
return null;
}
int type = BitUtil.to(buf.readUnsignedByte(), 6);
buf.readUnsignedByte(); // length
if (type == 4 || type == 8) {
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
int count = buf.readUnsignedShort();
buf.readUnsignedByte(); // hours / tickets
buf.readUnsignedByte(); // error code
buf.readUnsignedByte(); // reserved
buf.readUnsignedByte(); // logger speed
buf.readUnsignedByte(); // login time
buf.readUnsignedByte(); // minutes
for (int i = 0; i < count; i++) {
position.set("rssi" + (i + 1), buf.readUnsignedByte());
position.set("temp" + (i + 1), buf.readUnsignedByte() - 30);
int data = buf.readUnsignedShort();
position.set("src" + (i + 1), BitUtil.from(data, 10));
position.set("ullage" + (i + 1), BitUtil.to(data, 10));
}
return position;
} else if (type == 17) {
String sentence = buf.toString(StandardCharsets.US_ASCII);
Parser parser = new Parser(PATTERN, sentence);
if (!parser.matches()) {
return null;
}
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
DateBuilder dateBuilder = new DateBuilder()
.setTime(parser.nextInt(), parser.nextInt(), parser.nextInt());
position.setLatitude(parser.nextCoordinate());
position.setLongitude(parser.nextCoordinate());
position.set(Position.KEY_HDOP, parser.nextDouble());
position.setAltitude(parser.nextDouble());
position.setValid(parser.nextInt() > 0);
position.setCourse(parser.nextDouble());
position.setSpeed(parser.nextDouble());
dateBuilder.setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt());
position.setTime(dateBuilder.getDate());
return position;
}
return null;
}
}
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