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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
Hi, It probably is capacitive. It may be possible to set up the STM32 chip to handle it, but I'm not sure how at the moment - it'd be quite a lot of work to do though.
The best bet might be to buy a capacitive touch IC and just interface that to Espruino. Again, I don't know of any at the moment either - touch isn't something I've had time to look into.