Controller

ATXmega controller that have awesome support for wireless, can use with Logitech receiver, with usb type c. Support keyplus firmware.

Arduino pro micro clone with usb type c. Support TMK, QMK.

It is a breakout board of BL654 (nrf 52840 module) which is conscious of compatibility with Pro Micro, and it can correspond to both USB / Bluetooth Low Energy. Support BlueMicro, QMK firmware.

Arduino Pro Micro-sized breakout board for E73-2G4M08S1C (nRF52840) modules.

Support QMK with bluetooth out of the box.

Support BlueMicro firmware.

With this you can change keymap and use functions TMK firmware offers on your USB keyboard.

Convert old keyboard socket to usb.