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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.
@JumJum
Connected to the board first.
Used the link and select binary 1_3
Reset into bootloader (blue led blinking)
Didn't work
After restart of computer, now it works. Looks like a windows/chrome problem.