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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.
@Wilberforce
The NodeMcu:Dx notation that @MaBe referenced maps to the PIN numbers as labelled on the board.
If you use D0 this is gpio0 , and not the PIN label on the board...
Do you understand what I'm trying to say?