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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.
@halemmerich
Thanks, that then matches what I see when using those pins.
After a week of hiking there are casualties. The HRM seems to be broken. I do not know the exact reason but I suspect it to be either the glue at the HRM breaking down due to contact with sun screen and sweat or maybe the thin nylon at the bottom being a bit porous due to the SLS manufacturing. Maybe I can test that theory somehow with trying to press some water through with a syringe or something. If this is true I will probably need to do at least the bottom half in metal or coat it in epoxy from the inside to prevent moisture ingress.
Funnily enough the HRM survived multiple cycles of not working at some point in time around mid day while hiking with very low LED brightness still showing up and then seemingly drying up over night and showing believable results in the early morning with high LED brightness. Now it does nothing at all and its probably death by corrosion. Rest of the watch hardware seems fine, probably protected by the big battery over the HRM.