Firmware's done!

Finally finished working on the firmware.

• Nordic MCU's firmware sources and precompiled binaries can be found here.
• Pro Micro firmware (QMK based) sources can be found here.

Here's some footage:

On the right you can see the receiver that's plugged in to the computer. It uses a Pro Micro to run the QMK firmware which interrogates through UART the Core51822 for the state of the matrix. The Core51822 module communicates over Gazell protocol to the left and right hands of the keyboard. These two scan the matrix for keypresses and send keypresses data to the receiver.

I'm using the tweezers to short-circuit the switch pads to simulate a keypress.

Now is time for some sweet sweet PCB design...