USB MIDI slider

The code in this folder turns a CircuitPython-compatible microcontrolle board into a USB MIDI slider.

Download CircuitPython 7.x and flash it to your board (CircuitPython versions higher than 7.x may also work, but compatibility is not guaranteed). Your board will now appear as a USB mass storage device called CIRCUITPY volume.
Download the Adafruit CircuitPython library bundle compatible with your CircuitPython version, extract it and copy the adafruit_midi module into the lib folder of the CIRCUITPY volume.
Copy the .py files form this folder onto the CIRCUITPY volume.
Customize the config.py file according to your board and needs.

The default configuration works with the Raspberry Pi Pico. See the connection diagram below.

Connection diagram for Raspberry Pi Pico and slide potentiometer

You may need to adjust this with respect to your board and configuration.

Note: Version 7.x of CircuitPython does not support custom naming of USB devices (it seems a planned feature for v8.x: adafruit/circuitpython#6247). To connect the USB MIDI slider with other applications, you may need to look up the device name from your system information.

Debugging

The device outputs diagnostic messages to the serial console offered by your board.