I tried to start Sky Map and there is a long message at start-up saying that my phone reports not having a built-in compass. I used the A Compass app which state the same. Google map is not rotating as I rotate the phone etc…
Restarted the phone and it’s the same. I can find no option when the compass could have been disabled. Location services are set to High Precision.
Just tried the app you linked. It ask me to do the 8-motion calibration thing. But everything stays at zero. There is no intensity, or magnetic field direction detected.
The FF2 is not rooted, I’m using the last version installed by FF Updater: 19.02.1