[Telemetry] Support directly-attached GPS inputs to RX #3086
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wvarty
reviewed
Jan 1, 2025
wvarty
reviewed
Jan 1, 2025
wvarty
approved these changes
Jan 1, 2025
pkendall64
approved these changes
Jan 13, 2025
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Description
This PR adds support for wiring GPS units directly to ExpressLRS receivers via a dedicated UART port. After enabling GPS support on Serial1, GPS data is transmitted through standard CRSF telemetry sensors.
Things to Know
Supported Protocols
This implementation supports only NMEA at 115200 baud. Additional support may be added later. I used the RushFPV GNSS Mini Module.
Wiring Requirements
GPS modules must be connected to designated Serial1 UART pins on the receiver.
Testing
Tested with RushFPV GNSS Mini Module.
Limitations
This feature supports unidirectional data flow from the GPS to the receiver as basic telemetry sensors only. Bidirectional communication or advanced GPS features like configuration or UBX format are not supported.