Arduino-USBMIDI VS EspTinyUSB

But generally speaking MIDI and USB MIDI are based on fundamentally different communication protocols and always require a MCU to do the conversion. An Arduino Micro can do the job well and there are even Libraries with example code that does exactly this. See here: https://github.com/lathoub/Arduino-USBMIDI/blob/master/examples/MIDI_DIN2USB/MIDI_DIN2USB.ino

Option 3 - Arduino USB MIDI

hmm..yes you would have to code a little bit. But, cool learning experience? The examples are pretty good. This simple one: https://github.com/lathoub/Arduino-USBMIDI/blob/master/examples/Basic_IO/Basic_IO.ino shows part of the code that would replace the serial code in your original sketch. Note the library itself is handling the code that advertises the controller to Linux as a MIDI device. That's an important benefit.

Picked up a LilyGO T-Dongle (ESP32-S2) and going through their github (https://github.com/Xinyuan-LilyGO/T-Dongle-ESP32S2), they only have an example for reading the NAND over USB, via MSC. Has anyone been able to get the SD accessible for read and write in device mode on this or any other ESP32-S2 board? Tried using chegewara's EspTinyUSB, but couldn't get the device to appear in OTG mode.

In Arduino I have the ESP32TinyUSB library, and the board is set to ESP32 Dev Module. I am attempting to build the sketch in the examples for the library at EspTinyUSB/mouse.ino at master · chegewara/EspTinyUSB (github.com) .

The USB OTG pins CANNOT be remapped, which is one of the few functions that can't. Here's the library I use: https://github.com/chegewara/EspTinyUSB

I've been using this: https://github.com/chegewara/EspTinyUSB with the S3, though it was made for the S2. It is for Arduino.

I'd prefer to get the USB working first, and I've been using this project: https://github.com/chegewara/EspTinyUSB to try to get a sign life out of the thing.

You might be in luck because there is an example here. https://github.com/chegewara/EspTinyUSB/tree/master/examples/device/midi

Thanks for your reply. I see there is an active github discussion about USB support in the Arduino IDE, so I guess it is very new/cutting edge. I really like the look of /u/seonr's boards at Adafruit but I also hope we'll see some small/cheap/"pro" boards like the Arduino Pro Micro clones since it feels like this is what the S2 was designed for.