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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
What board are you using this on?
Looking at your previous posts it seems like it might be an ESP8266? Getting UDP on those requires actual firmware changes - @ClearMemory041063's code will only work when run on an Espruino board that is connected to an ESP8266.