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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.
Robin
I couldn't wait for the MDBT42V Espruino, so following guidance from Gordon, flashed one myself and made a little PCB and ring mount for it - the ring is currently bigger than it should be because it'll eventually have micro-USB charging.
It's mostly so I have a way to press buttons when using hand tracking in flight sims, but it turns out it's good for other things too (see video).