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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
I believe at least on the VC31B we do use the FIFO already - it'll all be in the file @fanoush linked above.
Nope - you can see how the raw values are output at https://github.com/espruino/Espruino/blob/21e7dd80611794e6da20109f35d12acdcdb85eec/libs/misc/hrm_vc31.c#L818-L836
Including
rawwhich I think really is the raw FIFO data