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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.
@etmpvga
And a final mistery, trying to hook on a batery...looking at the pin settings of P2 (from left to right), on PCB you see + -, while P3 (from left to right) shows - T +. And to make it even more confusing , the RAK documentation shows + T - (the other way around....).
Measuring the pins by checking the resistance, it seems the most right pins of P2 and P3 seem to be connected...