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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.
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My bangle.js 2 is giving very low readings, around -73m when I'm at ground level in South London. The number changes to a smaller negative number as I go upstairs, suggesting that something is working, but does it need calibrating in some way?