atbetaflight/docs/Gps.md

GPS

Two GPS protocols are supported. NMEA text and UBLOX Binary.

Configuration

Enable the GPS from the CLI as follows:

1. first enable the feature GPS
2. set the gps_provider
3. if required, set your GPS baud rate using gps_baudrate
4. connect your GPS to a serial port that supports GPS and set an approprate serial_port_x_scenario to 2. where x is a serial port number.
5. save.

For the last step check the Board documentation for pins and port numbers and check the Serial documentation for details on serial port scenarios where you will also find some example configurations.

GPS Provider

Set the gps_provider appropriately.

Value	Meaning
0	NMEA
1	UBLOX

SBAS

When using a UBLOX GPS the SBAS mode can be configured using gps_sbas_mode.

The default is AUTO.

Value	Meaning	Region
0	AUTO	Global
1	EGNOS	Europe
2	WAAS	North America
3	MSAS	Asia
4	GAGAN	India

If you use a regional specific setting you may achieve a faster GPS lock than using AUTO.