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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.
@Gordon
Ok, it seems like if you store the data as Uint16 (which is all you get off the accelerometer) it's 6 bytes per sample and at 20Hz that's 432kB per hour. So on Bangle.js 2 you're still looking at 20-ish hours.