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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.
@eska-muc
I can measure ~ 5V at the pins of the cable, when attached to a USB charger, so I do not think that it is a bad cable.
I'm quite sure, that I've attached it in the correct orientation: if the watch lays face down, the cable comes from the left side, if the watch is face up, the cable comes from the right. But there is also no indication of ongoing charging (I can't remember, if there should be some indication).