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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
How much higher?
I guess it's possible that it is missing an HRM-raw event every so often? And which one do you think is correct?
But the HRM code works by taking all the times between the beats and median-filtering them, so while there could be something wrong with that calculation, the filtering will end up changing the value a bit.
Code is here: https://github.com/espruino/Espruino/blob/master/libs/misc/heartrate.c#L290-L347