[royboy] from the Arduino forum has recently made a post showing off his Arduino / PC ambient light system. The system is simple to wire up and easy to use, as long as your video is being sent from… ...

The controls are wired to an Arduino control board that receives button presses and sends serial commands to a PC running a python script.

The Arduino comes pre-programmed with the Firmata sketch for PC Operation, which provides an interface to the Arduino hardware via a serial port for controlling the GPIO and peripherals.

Just gaining access to the additional UARTs isn’t hard. You simply use one of the additional serial port objects available. However, enabling UART 1 causes the ESP32 to crash!