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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.
user80065
@Gordon
And you're accessing it via https://www.espruino.com/ide/ ? The Chrome Web App version of the IDE won't have a relay option in it.
Please could you go to the developer console and paste up the messages displayed in it?