@foone Makes sense. I believe the nrf52840 is limited to BLE unfortunately. I was imagining it being two microcontrollers talking to each other, with one of them pretending to be a keyboard for the PC. In that case it wouldn't matter too much what the wireless protocol was. If you were hoping to have one microcontroller with commands being sent from another classic Bluetooth computer, that would be a bit more tricky.

@foone I might have missed why you’re trying to skip BLE?

The nrf52840 microcontroller is used a lot in the keyboard building world. You can have one plugged into your computer working like a USB dongle sending commands, and then have it connected wirelessly to a second nrf52840 which tells it which buttons to press. https://zmk.dev/docs/development/hardware-integration/dongle