After compass calibration has been repeated a few times, compass values have started to come up this
and this error screen appears when we try to calibrate again
Firmware : APM Copter v3.4-rc2
Are Offset Values of Compass written to SD card
could you please compile the compass example and run it?
Don't forget stop the apm service before launch it.
I run the compass example and the result is here. In my opinion compass works well with test code.
yes, the output looks as expected.
Could you launch the firmware manually?
sudo systemctl stop apm
Don't worry for the "garbage" values.
I launched the firmware manually and what should I observe with these commands ?
I formatted and flashed SD card (Debian Jessie ("frambuesa") update) again and Compass starts working again.
What is your idea about that problem? I wonder the reasons to avoid repeating the same error again
could be a problem with the SD card. It looks good now.
When I formatted and flashed SD card , that problem was solved, also I connected GPS & Compass and it works well too. Maybe the reason can be SD card.
Thanks for your time and support