Shortly after I added Gamecube controller support to my project that allows you to [connect an N64 controller to a Switch](https://www.reddit.com/r/NintendoSwitch/comments/10pjj2z/still_waiting_on_the_wireless_n64_controller/) via a Raspberry Pi Pico ($4 microcontroller) and USB cable, the Raspberry Pi foundation added Bluetooth support to their SDK for their $6 Pico W microcontrollers. It took some doing, as this is my first Bluetooth project and the spec is long, but I was able to update my project so that you can connect a Raspberry Pi Pico W to a Nintendo Switch as a Pro Controller over Bluetooth!Check it out and let me know if you have any questions or feedback!
[https://github.com/DavidPagels/retro-pico-switch](https://github.com/DavidPagels/retro-pico-switch)