Originally Posted by IceWind
When will he have access to this new Protocol specs?
I've been developing Android apps to interface several devices including FrSky Telemetry
and I'd be great to check the new PXX protocol.
The PXX protocol is used instead of PPM to send the channel data to the TX module. It's defined here:
We have a version running on several custom firmwares for the 9x transmitter, you need to upgrade the firmware in the FrSky TX module to use it. When you do upgrade, the TX module will only bind with telemetry receivers at present though. FrSky should have an updated version of the firmware some time, they are working on it.
The telemetry is still on the serial interface.