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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.
myownself
@jeffmer
The problem of removing the static accelerometer magnitude would seem to be the same as DC removal in Digital Signal Processing. The problem with a simple moving average is that it may obscure the signal at some orientations if as seems likely the magnitude at rest varies due to rotation. There is a great article here on a low cost very simple digital filter to deal with this - it even lists a 3-line Javascript implementation.