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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.
@Gordon
When you do
Serial.setupyou should be able to specify actspin. I'm not 100% sure it works on ESP32, but it should: http://www.espruino.com/Reference#l_Serial_setupOtherwise, it might make sense to set up some kind of serial protocol with a command and acknowledgement?