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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
Quite possibly. You're welcome to try but personally, getting that working well would take me some time!
I don't think sniffing sensor data would help you too much, as it really is just the PPG values you get.
One potential addition (I mentioned in previous threads) is ensuring that the sensor's auto-exposure calculations are disabled when there is increased acceleration. That way the raw PPG value might end up being a bit more stable when the acceleration is done