NMEA 0183 is a combined electrical and data specification for communication between marine electronics such as echo sounder, sonars, anemometer, gyrocompass, autopilot, GPS receivers and many other types of instruments
The following data text:
$GPGGA,130232.000,4529.9178,N,00913.9201,E,1,06,
1.35,133.5,M,48.0,M,,*68
$GPGSA,A,3,30,13,28,20,
05,15,,,,,,,1.63,1.35,0.92*02
$GPGSV,3,1,12,13,8
4,343,21,28,54,066,26,15,51,301,11,20,40,268,23*
77
$GPGSV,3,2,12,05,28,198,25,30,25,069,22,24,17
,264,19,17,12,127,*71
$GPGSV,3,3,12,07,03,074,,0
8,02,022,,19,01,146,,46,,,*4F
$GPRMC,130232.000
,A,4529.9178,N,00913.9201,E,0.40,260.06,100218,,,
A*6F
$GPVTG,260.06,T,,M,0.40,N,0.75,K,A*39
will be easily parsed with this java code:
import com.clickntap.nmea.NMEA;
import com.clickntap.nmea.NMEAUtils;
import com.clickntap.nmea.Position;
...
NMEA nmea = new NMEA();
JSONObject json = nmea.parse(text);
Position position = NMEAUtils.parsePosition(json);The Output JSON:
{
"messages": [
"$GPGGA,104734.000,4529.9248,N,00913.9249,E,2,06,1.50,110.3,M,48.0,M,0000,0000*67",
"$GPGSA,A,3,30,05,09,07,13,28,,,,,,,1.75,1.50,0.90*0C",
"$GPRMC,104734.000,A,4529.9248,N,00913.9249,E,0.53,241.11,120218,,,D*67",
"$GPVTG,241.11,T,,M,0.53,N,0.98,K,D*38"
],
"items": [
{
"fixQuality": 2,
"altitude": 110.3,
"altitudeMetric": "M",
"code": "GGA",
"latitude": 45.498747,
"horizontalDilutionOfPosition": 1.5,
"geoidalMetric": "M",
"numberOfSatellites": 6,
"time": "104734.000",
"longitude": 9.232082,
"geoidal": 48
},
{
"mode": "3",
"code": "GSA",
"automatic": "A"
},
{
"date": "120218",
"code": "RMC",
"latitude": 45.498747,
"speedKnots": 0.53,
"time": "104734.000",
"validity": "A",
"trackMadeGood": 241.11,
"longitude": 9.232082
},
{
"code": "VTG",
"speedKnots": 0.53,
"trackMadeGood": 241.11,
"speedKmPerHours": 0.98
}
],
"info": {
"date": "120218",
"altitude": 110.3,
"latitude": 45.498747,
"speedKnots": 0.53,
"numberOfSatellites": 6,
"time": "104734.000",
"longitude": 9.232082,
"speedKmPerHours": 0.98
}
}The interpreted sentences are:
- $GPGGA - Global Positioning System Fix Data
- $GPGSA - GPS DOP and active satellites
- $GPGSV - GPS Satellites in view
- $GPRMC - Recommended minimum specific GPS/Transit data
- $GPVTG - Track made good and ground speed
But it's really easy to add a new interpreter.
<dependency>
<groupId>com.clickntap</groupId>
<artifactId>nmea</artifactId>
<version>1.0</version>
</dependency>
Having trouble with NMEA API 1.x? Contact [email protected] and we’ll help you sort it out.
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