Dropping the source code for my rp2040 kmbox, it’ll auto-mirror (fULL PaSsTHroUgH) all of the mouse ids and string descriptors. Debugging output is on uart 1, kmbox commands on uart 2 (both are optional).
Currently targets the rp2040 adafruit usb host feather but any 2040 should work.
https://github.com/VoltCyclone/RaspberryKMBox
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