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SMS GPS Data Formats
#GPS/SMS Data
This page describes the various things related to radios and formats that I have discovered during development. This is for information only, and may help someone else.
Various formats of GPS data transmitted by radio model.
These are my notes, hopefully they help someone else.
See this page on Brandmeister for NMEA RMC details.
Radios known to output GPRMC
| Radio | Format |
|---|---|
| Anytone D878 | GPRMC |
| Anytone D578 | GPRMC |
| Anytone D868 | GPRMC |
| BTech DMR 6x2 | GPRMC |
Radios known to output GNRMC:
| Radio | Format |
|---|---|
| Retevis RT73 | GNRMC |
Example NMEA GPRMC output:
'~'~$GPRMC,015857.000,A,4519.2000,N,12127.0000,W,0.00,121.00,190121,,,A*67
Example NMEA GNRMC output:
'~'~$GNRMC,224048.000,A,2527.41211,S,04932.96192,W,0.00,99.18,120121,,,A,V*39
After BPTC decoding, we find that the NMEA sentence is a UTF-16 string. Usually 3 CSBK blocks, followed by the deader, then the data blocks. Typically sent as unconfirmed UDP.