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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.
@Fteacher
I'm considering buying a chest heart rate monitor, like the H10, but there are also fancier options out there, like the garmin hrm pro ( https://www.garmin.com/en-US/p/682155 ) that transmits "vertical oscillation, ground contact time, stride length, vertical ratio and more". If I can get the data out of it in the .gpx file through bthrm (or else), then I may consider this option. Ah, I would use the run+ app for that.
Does it sound feasible ? What would it take to make it work ?