TLDR; I am trying to set up my Pixhawk Cube-powered quadcopter with one 2.4 GHz radio and RFD900 sik telemetry radios to use as a ground station. The link is good. But when the RFD radio is connected the quad won’t let me arm and fly.
The software running on the quad is ChibiOs, arducopter if I understand correctly. The mission is planned and the quad is on the ground, powered and ready to go. When both 2.4GHz radio and RFD900 are connected at the same time I am unable to arm and proceed with the mission. As soon as I disconnect the RFD900 I can normally arm with the 2.4Ghz radio as I would usually and everything works as expected.
I also tried one thing. I tried to arm and take off using the 2.4GHz radio in loiter mode. Once airborne and hovering a few meters above the ground I connected RFD900 and then the quad (probably still in loiter mode) lost power and almost crashed, landed, and disarmed. Almost like if you’d suddenly lowered the throttle all the way down in loiter mode.
I don’t know what is happening. Clearly this must be some kind of issue related to settings. Could somebody steer me in the right direction? I have a feeling there must be a setting telling the copter who is the master radio link and who overrides who. But I was unable to find it.