Hi philr, unfortunately not! In the end the project was quite time-sensitive so I scrapped the need for serial as it was just an added bonus anyway. What's interesting is that I'm able to get the ESP32 to print to the serial console in the Arduino IDE but had no luck getting it to print to the Max ...

I have made a simple sketch to test sending values to a QT PY ESP32 S2 chip. The sketch compiles and uploads to both an Arduino and an ESP32 device, and I am able to send values to the Arduino using MegunoLink perfectly - the values are submitted with a button press and the Arduino repeats them back ...