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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
Hi,
Yes, right now there's no calibration built in (I guess you made the app from the Getting Started card?) but the altimeter uses the air pressure, and air pressure changes depending on the weather - so it does need some calibration of the starting height.
It should be reasonably easy to add a calibration value to that app though.