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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
Yes - however often the capacitance of a human is very small, so the time taken to charge/discharge is pretty tiny. I guess you could have some luck using Espruino's setWatch to measure the amount of time that the signal takes to charge up.
The solutions I've seen set up the hardware timers to do everything automatically though - but at the moment that would require use of peek and poke :)