HWT9053-RS485 | manual v0707 | http://wiki.wit-motion.com/english
Step 3. Judge the result--confirm if there is 1g on Z-axis acceleration
1. After1 ~ 2 seconds, the three axial acceleration value of the module is
about 0, 0，1, the X and Y axis Angle is around 0°. After calibration, the x-y
axis Angle is accurate.
Note: When putting the module horizontal, there is 1g of gravitational
acceleration on the Z-axis.
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