Hi Jatteau,
I have had good success with an Arduino ProMicro MIDI controller but gave up with an ESP32.
A free program MidiView is a very useful MIDI debug tool.
Currently looking at alternatives with the Ulanzi D100H Dial and have simple MIDI and CAT controllers
working successfully using an Autohotkeys script together with loopMidi.
The recently released Ulanzi MIDI plugin has some shortcomings which have been identified
to Ulanzi for consideration.
73
GM4CID