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3 Software Interface
3.1 NMEA Output Messages
The NMEA-0183 Output Messages are shown as below:
NMEA Record
GPGGA
Global positioning system fixed data: time, position, fixed type
GPGLL
Geographic position: latitude, longitude, UTC time of position fix and status
GPGSA
GPS receiver operating mode, active satellites, and DOP values
GPGSV
GNSS satellites in view: ID number, elevation, azimuth, and SNR values
GPRMC
Recommended minimum specific GNSS data: time, date, position, course, speed
GPVTG
Course over ground and ground speed
GPZDA
PPS timing message (synchronized to PPS)
The Trine XL uses the NMEA protocol of National Marine Electronics Association's
NMEA-0183 Version 3.00 interface specification. The Trine XL supports 7 types of sentences -
7 standard NMEA sentences (GPGGA, GPGLL, GPGSA, GPGSV, GPRMC, GPVTG, and
GPZDA).
The default output sentences are GPGGA, GPGSA, GPGSV, GPRMC, and GPVTG. The
UART communication parameters are 4800 bps, 8 data bits, 1 stop bit, and no parity. Other
output sentences, baud rate, and related configurations could be requested based on MOQ.
Single message example
$GPGGA,101229.487,3723.2475,N,12158.3416,W,1,07,1.0,9.0,M, , , ,0000*3E
$GPGLL,2446.8619,N,12100.2579,E,060725.000,A,A*7E
$GPGSA,A,3,05,02,26,27,09,04,15, , , , , ,1.8,1.0,1.5*11
$GPGSV,3,1,12,07,62,081,37,16,61,333,37,01,60,166,37,25,56,053,36*74
$GPGSV,3,2,12,03,43,123,33,23,32,316,34,14,17,152,30,20,16,263,33*78
$GPGSV,3,3,12,19,17,210,29,06,08,040,,15,06,117,27,21,05,092,27*7E
$GPRMC,101229.487,A,3723.2475,N,12148.3416,W,0.13,309.62,120598,,,A*7A
$GPVTG,,T,,M,0.00,N,0.0,K,A*13
$GPZDA,060526.000,20,06,2006,,*51
Descriptions
17
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