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
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
|
/*
* Copyright 2019 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.buffer.ByteBuf;
import io.netty.channel.Channel;
import org.traccar.BaseProtocolDecoder;
import org.traccar.session.DeviceSession;
import org.traccar.Protocol;
import org.traccar.helper.BitUtil;
import org.traccar.helper.DateBuilder;
import org.traccar.helper.ObdDecoder;
import org.traccar.helper.UnitsConverter;
import org.traccar.model.Position;
import java.net.SocketAddress;
import java.nio.charset.StandardCharsets;
public class NyitechProtocolDecoder extends BaseProtocolDecoder {
public NyitechProtocolDecoder(Protocol protocol) {
super(protocol);
}
public static final short MSG_LOGIN = 0x1001;
public static final short MSG_COMPREHENSIVE_LIVE = 0x2001;
public static final short MSG_COMPREHENSIVE_HISTORY = 0x2002;
public static final short MSG_ALARM = 0x2003;
public static final short MSG_FIXED = 0x2004;
private void decodeLocation(Position position, ByteBuf buf) {
DateBuilder dateBuilder = new DateBuilder()
.setDateReverse(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte())
.setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte());
position.setTime(dateBuilder.getDate());
int flags = buf.readUnsignedByte();
position.setValid(BitUtil.to(flags, 2) > 0);
double lat = buf.readUnsignedIntLE() / 3600000.0;
double lon = buf.readUnsignedIntLE() / 3600000.0;
position.setLatitude(BitUtil.check(flags, 2) ? lat : -lat);
position.setLongitude(BitUtil.check(flags, 3) ? lon : -lon);
position.setSpeed(UnitsConverter.knotsFromCps(buf.readUnsignedShortLE()));
position.setCourse(buf.readUnsignedShortLE() * 0.1);
position.setAltitude(buf.readShortLE() * 0.1);
}
private String decodeAlarm(int type) {
return switch (type) {
case 0x09 -> Position.ALARM_ACCELERATION;
case 0x0a -> Position.ALARM_BRAKING;
case 0x0b -> Position.ALARM_CORNERING;
case 0x0e -> Position.ALARM_SOS;
default -> null;
};
}
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
ByteBuf buf = (ByteBuf) msg;
buf.skipBytes(2); // header
buf.readUnsignedShortLE(); // length
String id = buf.readCharSequence(12, StandardCharsets.US_ASCII).toString();
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, id);
if (deviceSession == null) {
return null;
}
int type = buf.readUnsignedShortLE();
if (type != MSG_LOGIN && type != MSG_COMPREHENSIVE_LIVE
&& type != MSG_COMPREHENSIVE_HISTORY && type != MSG_ALARM && type != MSG_FIXED) {
return null;
}
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
if (type == MSG_COMPREHENSIVE_LIVE || type == MSG_COMPREHENSIVE_HISTORY) {
buf.skipBytes(6); // time
boolean includeLocation = buf.readUnsignedByte() > 0;
boolean includeObd = buf.readUnsignedByte() > 0;
buf.readUnsignedByte(); // include sensor
if (includeLocation) {
decodeLocation(position, buf);
} else {
getLastLocation(position, null);
}
if (includeObd) {
int count = buf.readUnsignedByte();
for (int i = 0; i < count; i++) {
int pid = buf.readUnsignedShortLE();
int length = buf.readUnsignedByte();
switch (length) {
case 1 -> position.add(ObdDecoder.decodeData(pid, buf.readByte(), true));
case 2 -> position.add(ObdDecoder.decodeData(pid, buf.readShortLE(), true));
case 4 -> position.add(ObdDecoder.decodeData(pid, buf.readIntLE(), true));
default -> buf.skipBytes(length);
}
}
}
position.set(Position.KEY_FUEL_USED, buf.readUnsignedInt() * 0.01);
position.set(Position.KEY_ODOMETER_TRIP, buf.readUnsignedInt());
} else if (type == MSG_ALARM) {
buf.readUnsignedShortLE(); // random number
buf.readUnsignedByte(); // tag
position.set(Position.KEY_ALARM, decodeAlarm(buf.readUnsignedByte()));
buf.readUnsignedShortLE(); // threshold
buf.readUnsignedShortLE(); // value
buf.skipBytes(6); // time
decodeLocation(position, buf);
} else if (type == MSG_FIXED) {
buf.skipBytes(6); // time
decodeLocation(position, buf);
} else {
decodeLocation(position, buf);
}
return position;
}
}
|
