Accelerometer: get a value as angle (pitch and roll)

[otso]

Just to clarify:

Do you get 180 degree “jumps” on the measurement while sensor is still?

@danybr

Moreover, having the FaceUp towards the ceiling and tilting it towards me, the angle should be 135° in reality the one measured is 225. In fact, the values that should be between 180 and 90 but those measured are 180 and 270.

This sounds like you’d have 90 degree offset in the results. The Z-axis positive direction is to “FaceUp”.