QGroundControl 0 channels detected


  • FrSky Taranis X9 Lite
  • FrSky R9M Lite Pro
  • FrSky R9 SX
  • Pixhawk 6c

The issue I am having is that QGroundControl says “Detected 0 radio channels. To operate PX4, you need at least 5 channels”.

I have the Taranis binded to the SX, I am sure of this as the green led turns on when the controller turns on and will turn red when the controller is off. I have the SX plugged into the PPM/SBUS RC port on the pixhawk. On the SX settings I am using SBUS protocol and have pin 5 set to S.PORT and pin 6 set to SBUS as per the manual of the SX. In the same settings page I am able to see that ch1-4 are receiving input.

It seems to me that there is an issue between the Pixhawk and QGroundControl.

Any help is appreciated!

Are you sure you have configured the receiver to SBUS mode and it is outputting SBUS on channel 6? And then, do you have channel 6 connected to the PPM/SBUS RC port of the Pixhawk?