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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
IR? That's just the little Infrared LED and sensor... or did you mean WiFi?
IR's quite fun for making things work from your own TV remote control. It's actually quite cheap - in volume those parts will cost under £0.5, but Bluetooth (especially on a board that plugs into the Pico) would cost nearer £5 I'd guess.