Update

Hardware Version Unlock Programming Hardware Version

Be careful: the board might fail to boot if the board revision is programmed incorrectly. In that case, reflashing via USB/serial port will be necessary.

Firmware

BOARD REVISION NOT PROGRAMMED. YOU MUST PROGRAM THE BOARD REVISION BEFORE UPDATING THE FIRMWARE. MAKE SURE YOU KNOW WHAT REVISION YOUR BOARD IS BEFORE DOING SO.

Latest official build
Official build archive

Possible troubleshooting steps:

Try again
Make sure no JTAG cable is plugged in
Power cycle board (remove both USB and power off ABC host)
Separately update ESP32 over USB before trying again
Check serial console for more detailed status messages