• How did you upload the custom firmware? Did you just use the Espruino bootloader to do it, or DFU?

    I guess it's possible the bootloader has got corrupted somehow.

  • I used the command line with the stm32loader.py script.

    python stm32loader.py -k -p /dev/tty.usbmodem1411 -evw espruino_1v99.3969_pico_1r3.bin
    

    is what I used.

    Also all I changed in the firmware was the Banner to say something else.

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