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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
Are you sure about that? And you're just powering it from a CR2032, with nothing else connected?
When the processor's really working hard the whole thing usually only draws around 4mA (the radio add 10 or so) - but even so that's really not enough to make the device hot.