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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@Eric
Would a simple vibration detector be suitable for zero battery drain option at a push?
Not sure how sensitive they are, but worth playing with. Possibly coupled with magnetometer variances followed by a vibration signal to indicate a motion followed by a sudden stop.
Another method could be based on a magnet mounted on rubber bands that would oscillate following a abrupt stop. Use the magnetometer to learn the polarity variances following various motions.
Not as solid state but may have some experimental legs in it?