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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
Is there any documentation for the HR sensor anywhere? I am falling into a rabbit hole of curiosity about what is possible, I'd be interested to know what exactly the sensor outputs. I have tried searching for it but am mostly finding products that use it, rather than details of the sensor itself.