I do not understand the explicit baud rate 3000000. It does not appear in the baud rates table for controlling the operational mode (e.g. normal, debug or raw modes).
Normal mode is supposed to be with a speed 300, but I see clearly my device with the LEDs working in normal mode. Testing is also OK.
The baud rate setting here has no effect on the modes (of the pro) it just makes sure the controlling tty doesn’t limit the rate of bytes through the virtual serial port. It is in Normal mode by default.