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
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
|
/*
* 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.util.Calendar;
import java.util.Properties;
import java.util.TimeZone;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
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 GlobalSatProtocolDecoder extends BaseProtocolDecoder {
private String format0;
private String format1;
public GlobalSatProtocolDecoder(ServerManager serverManager) {
super(serverManager);
// Initialize format strings
format0 = "TSPRXAB27GHKLMnaicz*U!";
format1 = "SARY*U!";
if (getServerManager() != null) {
Properties p = getServerManager().getProperties();
if (p.contains("globalsat.format0")) {
format0 = p.getProperty("globalsat.format0");
}
if (p.contains("globalsat.format1")) {
format1 = p.getProperty("globalsat.format1");
}
}
}
private Position decodeOriginal(Channel channel, String sentence) {
// Send acknowledgement
if (channel != null) {
channel.write("ACK\r");
}
// Message type
String format;
if (sentence.startsWith("GSr")) {
format = format0;
} else if (sentence.startsWith("GSh")) {
format = format1;
} else {
return null;
}
// Check that message contains required parameters
if (!format.contains("B") || !format.contains("S") ||
!(format.contains("1") || format.contains("2") || format.contains("3")) ||
!(format.contains("6") || format.contains("7") || format.contains("8"))) {
return null;
}
// Tokenise
if (format.contains("*")) {
format = format.substring(0, format.indexOf('*'));
sentence = sentence.substring(0, sentence.indexOf('*'));
}
String[] values = sentence.split(",");
// Parse data
Position position = new Position();
ExtendedInfoFormatter extendedInfo = new ExtendedInfoFormatter("globalsat");
for (int formatIndex = 0, valueIndex = 1; formatIndex < format.length() && valueIndex < values.length; formatIndex++) {
String value = values[valueIndex];
switch(format.charAt(formatIndex)) {
case 'S':
try {
position.setDeviceId(getDataManager().getDeviceByImei(value).getId());
} catch(Exception error) {
Log.warning("Unknown device - " + value);
return null;
}
break;
case 'A':
if (value.isEmpty()) {
position.setValid(false);
} else {
position.setValid(Integer.valueOf(value) != 1);
}
break;
case 'B':
Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
time.clear();
time.set(Calendar.DAY_OF_MONTH, Integer.valueOf(value.substring(0, 2)));
time.set(Calendar.MONTH, Integer.valueOf(value.substring(2, 4)) - 1);
time.set(Calendar.YEAR, 2000 + Integer.valueOf(value.substring(4)));
value = values[++valueIndex];
time.set(Calendar.HOUR, Integer.valueOf(value.substring(0, 2)));
time.set(Calendar.MINUTE, Integer.valueOf(value.substring(2, 4)));
time.set(Calendar.SECOND, Integer.valueOf(value.substring(4)));
position.setTime(time.getTime());
break;
case 'C':
valueIndex += 1;
break;
case '1':
double longitude = Double.valueOf(value.substring(1));
if (value.charAt(0) == 'W') longitude = -longitude;
position.setLongitude(longitude);
break;
case '2':
longitude = Double.valueOf(value.substring(4)) / 60;
longitude += Integer.valueOf(value.substring(1, 4));
if (value.charAt(0) == 'W') longitude = -longitude;
position.setLongitude(longitude);
break;
case '3':
position.setLongitude(Double.valueOf(value) * 0.000001);
break;
case '6':
double latitude = Double.valueOf(value.substring(1));
if (value.charAt(0) == 'S') latitude = -latitude;
position.setLatitude(latitude);
break;
case '7':
latitude = Double.valueOf(value.substring(3)) / 60;
latitude += Integer.valueOf(value.substring(1, 3));
if (value.charAt(0) == 'S') latitude = -latitude;
position.setLatitude(latitude);
break;
case '8':
position.setLatitude(Double.valueOf(value) * 0.000001);
break;
case 'G':
position.setAltitude(Double.valueOf(value));
break;
case 'H':
position.setSpeed(Double.valueOf(value));
break;
case 'I':
position.setSpeed(Double.valueOf(value) * 0.539957);
break;
case 'J':
position.setSpeed(Double.valueOf(value) * 0.868976);
break;
case 'K':
position.setCourse(Double.valueOf(value));
break;
default:
// Unsupported
break;
}
valueIndex += 1;
}
position.setExtendedInfo(extendedInfo.toString());
return position;
}
static private Pattern pattern = Pattern.compile(
"\\$" +
"(\\d+)," + // IMEI
"\\d+," + // mode
"(\\d)," + // Fix
"(\\d{2})(\\d{2})(\\d{2})," + // Date (DDMMYY)
"(\\d{2})(\\d{2})(\\d{2})," + // Time (HHMMSS)
"([EW])" +
"(\\d{3})(\\d{2}\\.\\d+)," + // Longitude (DDDMM.MMMM)
"([NS])" +
"(\\d{2})(\\d{2}\\.\\d+)," + // Latitude (DDMM.MMMM)
"(\\d+\\.?\\d*)," + // Altitude
"(\\d+\\.?\\d*)," + // Speed
"(\\d+)," + // Course
"(\\d+)," + // Satellites
"(\\d+\\.?\\d*)"); // HDOP
private Position decodeAlternative(Channel channel, String sentence) {
// Parse message
Matcher parser = pattern.matcher(sentence);
if (!parser.matches()) {
return null;
}
// Create new position
Position position = new Position();
ExtendedInfoFormatter extendedInfo = new ExtendedInfoFormatter("globalsat");
Integer index = 1;
// Identification
String imei = parser.group(index++);
try {
position.setDeviceId(getDataManager().getDeviceByImei(imei).getId());
} catch(Exception error) {
Log.warning("Unknown device - " + imei);
return null;
}
// Validity
position.setValid(parser.group(index++).compareTo("1") != 0 ? true : false);
// Time
Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
time.clear();
time.set(Calendar.DAY_OF_MONTH, Integer.valueOf(parser.group(index++)));
time.set(Calendar.MONTH, Integer.valueOf(parser.group(index++)) - 1);
time.set(Calendar.YEAR, 2000 + Integer.valueOf(parser.group(index++)));
time.set(Calendar.HOUR, Integer.valueOf(parser.group(index++)));
time.set(Calendar.MINUTE, Integer.valueOf(parser.group(index++)));
time.set(Calendar.SECOND, Integer.valueOf(parser.group(index++)));
position.setTime(time.getTime());
// Longitude
String hemisphere = parser.group(index++);
Double longitude = Double.valueOf(parser.group(index++));
longitude += Double.valueOf(parser.group(index++)) / 60;
if (hemisphere.compareTo("W") == 0) longitude = -longitude;
position.setLongitude(longitude);
// Latitude
hemisphere = parser.group(index++);
Double latitude = Double.valueOf(parser.group(index++));
latitude += Double.valueOf(parser.group(index++)) / 60;
if (hemisphere.compareTo("S") == 0) latitude = -latitude;
position.setLatitude(latitude);
// Altitude
position.setAltitude(Double.valueOf(parser.group(index++)));
// Speed
position.setSpeed(Double.valueOf(parser.group(index++)));
// Course
position.setCourse(Double.valueOf(parser.group(index++)));
// Satellites
extendedInfo.set("satellites", Integer.valueOf(parser.group(index++)));
// HDOP
extendedInfo.set("hdop", parser.group(index++));
position.setExtendedInfo(extendedInfo.toString());
return position;
}
@Override
protected Object decode(
ChannelHandlerContext ctx, Channel channel, Object msg)
throws Exception {
String sentence = (String) msg;
if (sentence.startsWith("GS")) {
return decodeOriginal(channel, sentence);
} else if (sentence.startsWith("$")) {
return decodeAlternative(channel, sentence);
}
return null;
}
}
|
