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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.
@Frida
When you are flashing gpio0 shall be grounded.
When running, shall gpio0 be left ungrounded, or pulled up with a resistor.
Remenber to put ch_pd to 3.3 volt to enable it.