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/*
* Copyright 2018 - 2021 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.DeviceSession;
import org.traccar.NetworkMessage;
import org.traccar.Protocol;
import org.traccar.helper.Checksum;
import org.traccar.helper.DateBuilder;
import org.traccar.helper.UnitsConverter;
import org.traccar.model.Position;
import java.net.SocketAddress;
import java.util.Date;
import java.util.LinkedList;
import java.util.List;
public class FreematicsProtocolDecoder extends BaseProtocolDecoder {
public FreematicsProtocolDecoder(Protocol protocol) {
super(protocol);
}
private Object decodeEvent(
Channel channel, SocketAddress remoteAddress, String sentence) {
DeviceSession deviceSession = null;
String event = null;
String time = null;
for (String pair : sentence.split(",")) {
String[] data = pair.split("=");
String key = data[0];
String value = data[1];
switch (key) {
case "ID":
case "VIN":
if (deviceSession == null) {
deviceSession = getDeviceSession(channel, remoteAddress, value);
}
break;
case "EV":
event = value;
break;
case "TS":
time = value;
break;
default:
break;
}
}
if (channel != null && deviceSession != null && event != null && time != null) {
String message = String.format("1#EV=%s,RX=1,TS=%s", event, time);
message += '*' + Checksum.sum(message);
channel.writeAndFlush(new NetworkMessage(message, remoteAddress));
}
return null;
}
private Object decodePosition(
Channel channel, SocketAddress remoteAddress, String sentence, String id) {
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, id);
if (deviceSession == null) {
return null;
}
List<Position> positions = new LinkedList<>();
Position position = null;
DateBuilder dateBuilder = null;
for (String pair : sentence.split(",")) {
String[] data = pair.split("[=:]");
int key;
try {
key = Integer.parseInt(data[0], 16);
} catch (NumberFormatException e) {
continue;
}
String value = data[1];
if (key == 0x0) {
if (position != null) {
position.setTime(dateBuilder.getDate());
positions.add(position);
}
position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
position.setValid(true);
dateBuilder = new DateBuilder(new Date());
} else if (position != null) {
switch (key) {
case 0x11:
value = ("000000" + value).substring(value.length());
dateBuilder.setDateReverse(
Integer.parseInt(value.substring(0, 2)),
Integer.parseInt(value.substring(2, 4)),
Integer.parseInt(value.substring(4)));
break;
case 0x10:
value = ("00000000" + value).substring(value.length());
dateBuilder.setTime(
Integer.parseInt(value.substring(0, 2)),
Integer.parseInt(value.substring(2, 4)),
Integer.parseInt(value.substring(4, 6)),
Integer.parseInt(value.substring(6)) * 10);
break;
case 0xA:
position.setLatitude(Double.parseDouble(value));
break;
case 0xB:
position.setLongitude(Double.parseDouble(value));
break;
case 0xC:
position.setAltitude(Double.parseDouble(value));
break;
case 0xD:
position.setSpeed(UnitsConverter.knotsFromKph(Double.parseDouble(value)));
break;
case 0xE:
position.setCourse(Integer.parseInt(value));
break;
case 0xF:
position.set(Position.KEY_SATELLITES, Integer.parseInt(value));
break;
case 0x12:
position.set(Position.KEY_HDOP, Integer.parseInt(value));
break;
case 0x20:
position.set(Position.KEY_ACCELERATION, value);
break;
case 0x24:
position.set(Position.KEY_BATTERY, Integer.parseInt(value) * 0.01);
break;
case 0x81:
position.set(Position.KEY_RSSI, Integer.parseInt(value));
break;
case 0x82:
position.set(Position.KEY_DEVICE_TEMP, Integer.parseInt(value) * 0.1);
break;
case 0x104:
position.set(Position.KEY_ENGINE_LOAD, Integer.parseInt(value));
break;
case 0x105:
position.set(Position.KEY_COOLANT_TEMP, Integer.parseInt(value));
break;
case 0x10c:
position.set(Position.KEY_RPM, Integer.parseInt(value));
break;
case 0x10d:
position.set(Position.KEY_OBD_SPEED, UnitsConverter.knotsFromKph(Integer.parseInt(value)));
break;
case 0x111:
position.set(Position.KEY_THROTTLE, Integer.parseInt(value));
break;
default:
position.set(Position.PREFIX_IO + key, value);
break;
}
}
}
if (position != null) {
position.setTime(dateBuilder.getDate());
positions.add(position);
}
return positions.isEmpty() ? null : positions;
}
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
String sentence = (String) msg;
int startIndex = sentence.indexOf('#');
int endIndex = sentence.indexOf('*');
if (startIndex > 0 && endIndex > 0) {
String id = sentence.substring(0, startIndex);
sentence = sentence.substring(startIndex + 1, endIndex);
if (sentence.startsWith("EV")) {
return decodeEvent(channel, remoteAddress, sentence);
} else {
return decodePosition(channel, remoteAddress, sentence, id);
}
}
return null;
}
}
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