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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.
@DrAzzy
Try using the gpio pin number and see if that works (ex, digitalWrite(13,1) ).
There are definitely pins you can't touch because they're used for the flash chip (the 6 pins at bottom of the esp12E modules)