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Teensy 4.1 Spacemouse to Midi Bridge
Here's some Arduino code for the Teensy 4.1 (Adafruit Product ID: 4622) that lets my Spacemouse Wireless from 3Dconnexion appear as a standard USB midi controller to my computer, and presumably any other USB midi hosting device. It provides six high-resolution CC pairs from the knob motion, and two on/off CC's for the two buttons.
The Teensy needs a jumper between the board Vin and the USB Host 5v pins to power the Spacemouse Dongle (unless a powered USB hub is inserted between them).
The teensy, of course, also needs to be fitted with a USB Host socket connected to the USB host pins on the board to to recieve the 3DConnexion dongle or USB wire.
The code was provided by ChatGPT after some relentless back and forth. I'm pretty clueless myself about it. But for a souless device planning to take over the world and annihilate us all, The Chatster has so far proved to be very patient and accomodating. Beyond the obviously tunable lines, the LLM should be able to adapt it more to your liking, even if your skills are as meager as my own.