While the Arduino family of boards connect to your computer using a USB virtual serial port, the ATmega ones have an actual serial connection on-board.

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!

A tuning mechanism consisting of 10 stepper motors and a further 10 servo motors for plucking the strings—combined with an arduino controller and some clever MaxMSP and Pure Data programming ...