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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.
petersen77
Calibration on accelerometer usually only corrects absolute measurements (e.g. when standing still it should measure the gravity of the planet you are currently on). Bot the absolute value does not matter here, its just about movement vs no movement.
Correction: There can be also a calibration for no movement, but I don't think this is a calibration issue here. But you might want to do the test 1) from 4 posts above.