Garmin GPS driver.
All Garmin receivers understand the latest NMEA standard which is called: 0183 version 2.0.
This standard dictates a transfer rate of 4800 baud.
This driver can read only the following messages (sentences):
- GPGGA: fix data
- PGRME: (estimated error) - not sent if set to 0183 1.5 (garmin-specific)
- GPVTG: vector track and speed over ground
- GPRMC: known as the "Recommended Minimum" sentence, is the most common sentence transmitted by GPS devices. This one sentence contains nearly everything a GPS application needs: latitude, longitude, speed, bearing, satellite-derived time, fix status and magnetic variation.
Processing of individual messages can be disabled in the Config structure.
Note that when fixType contained in the GPGGA is Invalid, all other data in all messages except the time stamps are meaningless.
Referennces: