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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.
@yngv126399
I answer my own issue... sometimes just writing it out leads me to the answer..
If I supply a usart=1 in the chip section, if compiles. Makes sense, but interesting you can't decline to have a usart.