I'm setting up my first quad with Navio2 and ArduPilot. The APM Planner keeps telling me "PreArm check RC not calibrated". When I go to the Radio calibration area I can see 4 out of 8 channels reacting to my input.. I tried calibrating but nothing's changed.
What am I doing wrong? How can I calibrate the other 4 channels?
I've got a Taranis X9D plus with an X8R receiver.