Userspace service for Logitech keyboards with per-key RGB LEDs.

Quick links:

• installing
• documentation
• sample configuration
• issue tracker

This project supports all Logitech USB keyboards, on most keyboard layouts. The service is obviously only useful with those featuring per-key light control.

• Flexible per-application RGB settings with key groups.
• Can react to window title changes, enabling switching profiles based on current webpage in browser or open file extension in editors.
• Features improved animation plugins, with key group support:
  • Fixed colors.
  • Breathing effect (transparency-based).
  • Wave effect (wavelength, speed and direction fully configurable, supports arbitrary color list with transparency).
  • Stars effect (number, color list and light duration configurable).
  • Keypress feedback effect (as all plugins, can be composited).
• Several plugins can be active at once, and composited with alpha blending to build complex effects.
• Systemd session support, detecting user switches so multiple users can use the service without them fighting over keyboard control.
• Supports multi-keyboard with different configuration per keyboard.

And a few goodies:

• Effects are implemented as loadable modules, using a clean API. Develop yours now.
• Command-line tool for your scripting needs and extended configuration (set game-mode keys, change report rate, see USB exchanges…).
• Optimized pure C library.
• Python3 bindings for the library.

Feedback, feature ideas, pull requests are welcome!