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This sort of thing already exists, albeit in a low-tech method, using ball bearings or coloured gels. For example: https://spotsee.io/wp-content/uploads/2018/06/tiltwatch-plus...



Clever, although with an accelerometer you may also keep track of which stretch of the journey they get handled the roughest.


More importantly, that advertises its presence to the handlers


that's pretty ingenious!




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