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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
As long as you have the battery widget installed the watch should buzz when power is applied, and it'll display a little charging icon next to the battery symbol.
The green light on the back of the watch shouldn't be on normally unless you installed something like the heart rate widget.