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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.
@MaBe
for a wemos board you have to use NodeMCU pin names
http://www.espruino.com/Reference#NodeMCU
https://github.com/espruino/Espruino/blob/master/targets/esp8266/jswrap_nodemcu.c