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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
What sort of heater are you using? What is powering it?
With a thyristor, my understanding is that if using it with a DC source, you can't turn it off (with AC, it turns off every cycle - which is why these are often used to switch AC) without turning off the power supply to it, which means you'd need another switch...