I have an Arducopter APM 2.8 board with firmware version 3.1.5 and Mission Planner 1.3.74 on a Windows 10 laptop. I’ve removed jumper JP1 and the jumper next to the inputs has been moved all the way to the left. When I connect the board, which is all by itself and levelled, and try to do Accel. Calibration, there is no response when I click “calibrate accel.” and when I click “calibrate level” after a 1 minute delay I get an error message “failed to level”
Hi, Did you got solution for this?
I have the same issue on APM 2.8
you need an old version of mission planner.
Jump in the Wayback Machine and try one of these ancient versions.
1972 might be a bit to far back…