(still work in progress, not fully tested)
A smart MIDI box based on a STM32 "blue pill" microcontroller (STM32F103C8T6).
Software is hosted on Github: https://github.com/retro16/MidiBox
Some parts on the PCB are optional, depending on what you wish to do with the
### Extender address
J1 and J2 are only useful for port extenders so it's useless to put the...