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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.
@myownself
Yes. There is a thread open about what we can get from the PPG sensor (heart rate sensor). I know there are already comments in the firmware regarding SPO2 so Gordon might have made a start, but essentially my understanding is SPO2 is calculated using ratios of the AC and DC components of the PPG signal.