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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
Thanks! Yes, making it all work off USB would be great - I think it would work fine.
... if at some point you move it to an Espruino Pico, you'll basically have everything you need right in the USB plug!