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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
Hi - that's to be expected - the button is actually connected to pin D0 - so
BTN == D0. It's just that when you print it, Espruino chooses to printD0and notBTNto the screen