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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.
@Andrey
tryed to download thru swd, downloaded well, but espruino still doesn't work.
so, there is actually not original Espruino board, LED connected to F103rct6 PA15.
oscillator changed, moved closer to chip.
what is the serial 1 speed by default? 38400?
Another problem can be, that I didn't pullup USB_DP and I still have console on Usb, not on serial1.
upd: pulled up USB_DP - no results