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/*
* Copyright 2022 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 org.traccar.BaseProtocolDecoder;
import org.traccar.session.DeviceSession;
import org.traccar.Protocol;
import org.traccar.helper.Parser;
import org.traccar.helper.PatternBuilder;
import org.traccar.model.Position;
import java.net.SocketAddress;
import java.util.regex.Pattern;
public class EnvotechProtocolDecoder extends BaseProtocolDecoder {
public EnvotechProtocolDecoder(Protocol protocol) {
super(protocol);
}
private static final Pattern PATTERN = new PatternBuilder()
.text("$")
.number("dd") // mode
.expression("...,") // hardware
.number("(x+),") // event
.number("x+,") // group
.number("(x+),") // device id
.number("(dd)(dd)(dd)") // date (ddmmyy)
.number("(dd)(dd)(dd),") // time (hhmmss)
.number("xx") // connection status
.number("(dd)") // rssi
.number("d{5},") // mcc
.number("(ddd)") // power
.number("(ddd),") // battery
.number("(xx)") // inputs
.number("(xx),") // outputs
.number("(xxx)?") // fuel
.number("(xxx)?,") // weight
.number("(x{8}),") // status
.expression("[^']*'")
.number("(dd)(dd)(dd)") // date (ddmmyy)
.number("(dd)(dd)(dd)") // time (hhmmss)
.number("(d)") // fix
.number("(d+)(d{5})([NS])") // latitude
.number("(d+)(d{5})([EW])") // longitude
.number("(ddd)") // speed
.number("(ddd)") // course
.any()
.compile();
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
Parser parser = new Parser(PATTERN, (String) msg);
if (!parser.matches()) {
return null;
}
Position position = new Position(getProtocolName());
int event = parser.nextHexInt();
switch (event) {
case 0x60 -> position.set(Position.KEY_ALARM, Position.ALARM_LOCK);
case 0x61 -> position.set(Position.KEY_ALARM, Position.ALARM_UNLOCK);
}
position.set(Position.KEY_EVENT, event);
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
if (deviceSession == null) {
return null;
}
position.setDeviceId(deviceSession.getDeviceId());
position.setDeviceTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
position.set(Position.KEY_RSSI, parser.nextInt());
position.set(Position.KEY_POWER, parser.nextInt() * 0.01);
position.set(Position.KEY_BATTERY, parser.nextInt() * 0.01);
position.set(Position.KEY_INPUT, parser.nextHexInt());
position.set(Position.PREFIX_OUT, parser.nextHexInt());
position.set(Position.KEY_FUEL_LEVEL, parser.nextHexInt());
position.set("weight", parser.nextHexInt());
position.set(Position.KEY_STATUS, parser.nextHexLong());
position.setFixTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
position.setValid(parser.nextInt() > 0);
position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_DEG_HEM));
position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_DEG_HEM));
position.setSpeed(parser.nextInt());
position.setCourse(parser.nextInt());
return position;
}
}
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