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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
Have you tried with low baudrate, with the baud rate changed in
digitalPulseas well?Also, maybe just try removing
digitalPulseand setting TX_ENABLE_PIN constantly withdigitalWrite(TX_ENABLE_PIN,1)(you could trydigitalWrite(TX_ENABLE_PIN,0)just in case it was inverted)