I have an Arduino Nano flashed with the Pypilot motor.ino connected to OpenPlotter over USB. I've created a USB alias in OP's Serial panel but the PyPilot panel warns me that I must configure a Uart interface in Serial to use PyPilot in autpilot mode (as opposed to IMU Only mode).

However, everything works. motor responds to moving the IMU and autopilot inputs.

Is the UART warning spurious and safe to ignore or is there a good reason to connect the motor controller Arduino to a GPIO UART rather than use the USB serial connection?

Thanks!

Jake.