User's Guide

Chapter 3
Data Readings
3.1 Tilt Readings
The tilt readings are provided in degrees (°) and the range of each
axis is ±90°. The angle of each axis is relative to the gravity vector.
If the axis is pointing straight down it will be aligned with the gravity
vector and will return a reading of -90°. If the axis is inverted and
points straight up, the reading will be +90°. An axis that is perfectly
horizontal/level will return a reading of 0°.
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