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/*
* Copyright 2017 - 2020 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.channel.Channel;
import io.netty.channel.socket.DatagramChannel;
import org.traccar.BaseProtocolDecoder;
import org.traccar.DeviceSession;
import org.traccar.NetworkMessage;
import org.traccar.Protocol;
import org.traccar.helper.BitUtil;
import org.traccar.helper.Parser;
import org.traccar.helper.PatternBuilder;
import org.traccar.helper.UnitsConverter;
import org.traccar.model.Position;
import java.net.SocketAddress;
import java.util.regex.Pattern;
public class EskyProtocolDecoder extends BaseProtocolDecoder {
public EskyProtocolDecoder(Protocol protocol) {
super(protocol);
}
private static final Pattern PATTERN = new PatternBuilder()
.expression("..;") // header
.number("d+;")
.number("(d+);") // imei
.text("R;") // data type
.number("(d+)[+;]") // satellites
.number("(dd)(dd)(dd)") // date
.number("(dd)(dd)(dd)[+;]") // time
.number("(-?d+.d+)[+;]") // latitude
.number("(-?d+.d+)[+;]") // longitude
.number("(d+.d+)[+;]") // speed
.number("(d+)[+;]") // course
.groupBegin()
.text("0x").number("(d+)[+;]") // input
.number("(d+)[+;]") // message type
.number("(d+)[+;]") // odometer
.groupEnd("?")
.number("(d+)[+;]") // adc 1
.number("(d+)") // voltage
.any()
.compile();
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
String sentence = (String) msg;
Parser parser = new Parser(PATTERN, sentence);
if (!parser.matches()) {
return null;
}
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
if (deviceSession == null) {
return null;
}
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
position.set(Position.KEY_SATELLITES, parser.nextInt());
position.setValid(true);
position.setTime(parser.nextDateTime());
position.setLatitude(parser.nextDouble());
position.setLongitude(parser.nextDouble());
position.setSpeed(UnitsConverter.knotsFromMps(parser.nextDouble()));
position.setCourse(parser.nextDouble());
if (parser.hasNext(3)) {
int input = parser.nextHexInt();
position.set(Position.KEY_IGNITION, !BitUtil.check(input, 0));
position.set(Position.PREFIX_IN + 1, !BitUtil.check(input, 1));
position.set(Position.PREFIX_IN + 2, !BitUtil.check(input, 2));
position.set(Position.KEY_EVENT, parser.nextInt());
position.set(Position.KEY_ODOMETER, parser.nextInt());
}
position.set(Position.PREFIX_ADC + 1, parser.nextInt());
position.set(Position.KEY_BATTERY, parser.nextInt() * 0.01);
int index = sentence.lastIndexOf('+');
if (index > 0 && channel instanceof DatagramChannel) {
channel.writeAndFlush(new NetworkMessage("ACK," + sentence.substring(index + 1) + "#", remoteAddress));
}
return position;
}
}
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