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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.
@user140377
Sure, but it should be slim enough to fit between watch and wrist and if needed you can buy CR2032 everywhere. My usage is more the 2 or 3 days in the year where I would like a full day (~8 hours) GPS active.