Troubleshooting

Failure to enter Command mode is often due to baud rate mismatch. Ensure that the baud rate of the connection matches the baud rate of the device. By default, BD (Baud Rate) = 3 (9600 b/s).

There are two alternative ways to enter Command mode:

• A serial break for six seconds enters Command mode. You can issue the "break" command from a serial console, it is often a button or menu item.
• Asserting DIN (serial break) upon power up or reset enters Command mode. XCTU guides you through a reset and automatically issues the break when needed.

Both of these methods temporarily set the device's baud rate to 9600 and return an OK on the UART to indicate that Command mode is active. When Command mode exits, the device returns to normal operation at the baud rate that BD is set to.