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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.
@Ollie
Oh no. Sorry @wardy if I led you down the garden path there. My suggestion was based on a 433MHz radio module which I have and where a similar pulsing principle applies. That module has the 3 pins I spoke of. Sorry... a little knowledge is a dangerous thing :(