aboutsummaryrefslogtreecommitdiff
path: root/src/org/traccar/protocol/AtrackProtocolDecoder.java
blob: ba03e0642da8923e44a685f55c0a3f98d21e2f75 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
/*
 * Copyright 2013 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.nio.charset.Charset;
import java.util.Date;
import org.jboss.netty.buffer.ChannelBuffer;
import org.jboss.netty.channel.Channel;
import org.jboss.netty.channel.ChannelHandlerContext;
import org.traccar.BaseProtocolDecoder;
import org.traccar.ServerManager;
import org.traccar.helper.Log;
import org.traccar.model.ExtendedInfoFormatter;
import org.traccar.model.Position;

public class AtrackProtocolDecoder extends BaseProtocolDecoder {

    public AtrackProtocolDecoder(ServerManager serverManager) {
        super(serverManager);
    }

    private String readImei(ChannelBuffer buf) {
        int b = buf.readUnsignedByte();
        StringBuilder imei = new StringBuilder();
        imei.append(b & 0x0F);
        for (int i = 0; i < 7; i++) {
            b = buf.readUnsignedByte();
            imei.append((b & 0xF0) >> 4);
            imei.append(b & 0x0F);
        }
        return imei.toString();
    }

    private static final int MSG_HEARTBEAT = 0x1A;
    private static final int MSG_DATA = 0x10;

    @Override
    protected Object decode(
            ChannelHandlerContext ctx, Channel channel, Object msg)
            throws Exception {

        ChannelBuffer buf = (ChannelBuffer) msg;

        buf.skipBytes(2); // prefix
        buf.readUnsignedShort(); // checksum
        buf.readUnsignedShort(); // length
        buf.readUnsignedShort(); // sequence

        // Create new position
        Position position = new Position();
        ExtendedInfoFormatter extendedInfo = new ExtendedInfoFormatter("atrack");

        // Get device id
        String id = String.valueOf(buf.readLong());
        try {
            position.setDeviceId(getDataManager().getDeviceByImei(id).getId());
        } catch(Exception error) {
            Log.warning("Unknown device - " + id);
        }

        // Date and time
        position.setTime(new Date(buf.readUnsignedInt() * 1000)); // gps time
        buf.readUnsignedInt(); // rtc time
        buf.readUnsignedInt(); // send time

        // Coordinates
        position.setValid(true);
        position.setLongitude(buf.readInt() * 0.000001);
        position.setLatitude(buf.readInt() * 0.000001);
        position.setAltitude(0.0);

        // Course
        position.setCourse((double) buf.readUnsignedShort());
        
        // Report type
        extendedInfo.set("type", buf.readUnsignedByte());
        
        // Milage
        extendedInfo.set("milage", buf.readUnsignedInt() * 0.1);
        
        // Accuracy
        extendedInfo.set("hdop", buf.readUnsignedShort() * 0.1);
        
        // Input
        extendedInfo.set("input", buf.readUnsignedByte());

        // Speed
        position.setSpeed(buf.readUnsignedShort() * 0.539957);

        // Output
        extendedInfo.set("output", buf.readUnsignedByte());

        // ADC
        extendedInfo.set("adc", buf.readUnsignedShort() * 0.001);

        // Driver
        int length = 0;
        while (buf.getByte(buf.readerIndex() + length) != 0) {
            length += 1;
        }
        if (length != 0) {
            extendedInfo.set("driver",
                    buf.toString(buf.readerIndex(), length, Charset.defaultCharset()));
            buf.skipBytes(length);
        }
        buf.readByte();
        
        // Temperature
        extendedInfo.set("temperature1", buf.readShort() * 0.1);
        extendedInfo.set("temperature2", buf.readShort() * 0.1);
        
        // TODO: text message

        position.setExtendedInfo(extendedInfo.toString());
        return position;
    }

}