How to do Gesture Recognition using Accelerometers

Question

My goal is to recognize simple gestures from accelerometers mounted on a sun spot. A gesture could be as simple as rotating the device or moving the device in several differ

Answer 1

Adding to moonshadow's point about having to reset your baseline for gravity and rotation...

Unless the device is expected to have stable moments of rest (where the only force acting on it is gravity) to reset its measurement baseline, your system will eventually develop an equivalent of vertigo.