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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.
@MaBe
Maybe you want to check this video as well APA102 RGB Pixel Addressable LED
, Julian Ilett is doing great stuff !
Or check this site digging-into-the-apa102-serial-led-protocol on HACKADAY