Qmk

QMK

QMK (Quantum Mechanical Keyboard) is an open-source firmware for mechanical keyboards that enables users to customize and program various aspects of their keyboards. It provides a rich set of features for customization, including keymaps, macros, LED backlighting, and layers.

QMK is built on top of the popular AVR and ARM microcontrollers, making it compatible with a wide range of keyboards, including custom and commercial keyboards. It allows users to create fully programmable keyboard layouts, which can then be saved, shared, and reused across different boards or devices.

NixOS configuration

To access the keyboard for configuration as a normal non-root user add the following nixos configuration:

{
  hardware.keyboard.qmk.enable = true
}

After that you can configure keyboard settings using the Via app (if your firmware has enabled support for it).

Flashing custom firmware

The qmk commandline application is fully supported in nixpkgs. After doing nix-shell -p qmk you can follow the upstream documentation for building, customizing and flashing your keyboard