A radio calibration is in progress
Stops itRadio control
What ArduPilot says:
- PreArm: RC calibrating
The ground station has started a radio calibration and not finished it. While it runs the channel limits are being rewritten, so arming is refused.
What to do, most likely first
The calibration screen is still open, or the ground station disconnected in the middle of it.
FixFinish the calibration (the button that ends it), or reboot the flight controller and calibrate again from the start.
Where to do it:Setup & Tuning Guide
The code that sends it
PreArm: RC calibrating
libraries/AP_Arming/AP_Arming.cpp AP_Arming::rc_in_calibration_check() · Open in ArduPilot Copter-4.7.1