I use m5unified library. Putting atomS3R screen up gives wrong
magnetometer readings on Z. If I flip it screen down it gives correct mag on Z.

This type of flip should change only sign of mag reading on Z axis.
But on atomS3R it changes mag field on magnitude of 3, which is clearly wrong.

I flip my iphone and Z mag just changes sign (correctly) if faced screen up changed to screen down.

I think atomS3R is just not working.
'
Thanks