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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.
@OwenBrotherwood
Good idea with 3.3v i/o.
There are sonic devices that do 3.3v so I agree: the user has to know about 5v tolerent and choose the correct hardware for their needs and Endruino has a solution in software to drive correct hardware