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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
Just to add, this won't work on the newest 1v79 firmware. You'll need to use a Git build, like this one
And only use it if you've got a USB-TTL converter as well - in case it all goes wrong!