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/*
* Copyright 2014 - 2015 Anton Tananaev (anton.tananaev@gmail.com)
*
* 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 java.net.SocketAddress;
import java.nio.charset.Charset;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Locale;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.jboss.netty.buffer.ChannelBuffer;
import org.jboss.netty.buffer.ChannelBuffers;
import org.jboss.netty.channel.Channel;
import org.traccar.BaseProtocolDecoder;
import org.traccar.helper.UnitsConverter;
import org.traccar.model.Event;
import org.traccar.model.Position;
public class TramigoProtocolDecoder extends BaseProtocolDecoder {
public TramigoProtocolDecoder(TramigoProtocol protocol) {
super(protocol);
}
public static final int MSG_COMPACT = 0x0100;
public static final int MSG_FULL = 0x00FE;
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
ChannelBuffer buf = (ChannelBuffer) msg;
int protocol = buf.readUnsignedByte();
buf.readUnsignedByte(); // version id
int index = buf.readUnsignedShort();
int type = buf.readUnsignedShort();
buf.readUnsignedShort(); // length
buf.readUnsignedShort(); // mask
buf.readUnsignedShort(); // checksum
long id = buf.readUnsignedInt();
buf.readUnsignedInt(); // time
Position position = new Position();
position.setProtocol(getProtocolName());
position.set(Event.KEY_INDEX, index);
position.setValid(true);
if (!identify(String.valueOf(id), channel)) {
return null;
}
position.setDeviceId(getDeviceId());
if (protocol == 0x01 && (type == MSG_COMPACT || type == MSG_FULL)) {
// need to send ack?
buf.readUnsignedShort(); // report trigger
buf.readUnsignedShort(); // state flag
position.setLatitude(buf.readUnsignedInt() * 0.0000001);
position.setLongitude(buf.readUnsignedInt() * 0.0000001);
buf.readUnsignedShort(); // GSM signal quality
buf.readUnsignedShort(); // satellites in fix
buf.readUnsignedShort(); // satellites in track
buf.readUnsignedShort(); // GPS antenna state
position.setSpeed(buf.readUnsignedShort() * 0.194384);
position.setCourse((double) buf.readUnsignedShort());
buf.readUnsignedInt(); // distance
position.set(Event.KEY_BATTERY, buf.readUnsignedShort());
buf.readUnsignedShort(); // battery charger status
position.setTime(new Date(buf.readUnsignedInt() * 1000));
// parse other data
return position;
} else if (protocol == 0x80) {
if (channel != null) {
channel.write(ChannelBuffers.copiedBuffer("gprs,ack," + index, Charset.defaultCharset()));
}
String sentence = buf.toString(Charset.defaultCharset());
// Coordinates
Pattern pattern = Pattern.compile("(-?\\d+\\.\\d+), (-?\\d+\\.\\d+)");
Matcher matcher = pattern.matcher(sentence);
if (!matcher.find()) {
return null;
}
position.setLatitude(Double.parseDouble(matcher.group(1)));
position.setLongitude(Double.parseDouble(matcher.group(2)));
// Speed and Course
pattern = Pattern.compile("([NSWE]{1,2}) with speed (\\d+) km/h");
matcher = pattern.matcher(sentence);
if (matcher.find()) {
position.setSpeed(UnitsConverter.knotsFromKph(Double.parseDouble(matcher.group(2))));
position.setCourse(0); // matcher.group(1) for course
}
// Time
pattern = Pattern.compile("(\\d{1,2}:\\d{2} \\w{3} \\d{1,2})");
matcher = pattern.matcher(sentence);
if (!matcher.find()) {
return null;
}
DateFormat dateFormat = new SimpleDateFormat("HH:mm MMM d yyyy", Locale.ENGLISH);
position.setTime(dateFormat.parse(matcher.group(1) + " " + Calendar.getInstance().get(Calendar.YEAR)));
return position;
}
return null;
}
}
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