Use option 4 to change the baud rate of the serial interface.
To change the baud rate from the Utility menu:
Select option (1-12 or Q): 1 - 2400 2 - 4800 3 - 9600 4 - 19200 5 - 38400 6 - 57600 7 - 115200 8 - Exit without change
Note
The selected baud rate takes effect immediately.