Am I correct in assuming that the 5 DOF IMU (accelerometer and gyroscope) is mounted horizontally to measure acceleration along all 3 axis and rotation around the X and Z axis?Bearing that in mind, what purpose does the Dual Axis Gyroscope serve? Even mounted vertically, surely it would still measure rotations around the X and Z axis?
the Y axis to determine if the device is 'falling'
Gravity conventionally acts in the z axis.
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