Lenovo Legion 5 Pro 2021 Linux RGB Keyboard Light Controller

This util allows to drive RGB keyboard light on Lenovo Legion 5 Pro 16iah7h Laptop

Requirements

• pyusb

Install

Nix

git clone https://github.com/imShara/l5p-kbl
nix-shell --command ./lightblue.py

Regular python

git clone https://github.com/imShara/l5p-kbl
cd l5p-kbl
python3 -m venv env
source ./env/bin/activate
pip install -r requirements.txt
python3 l5p-kbl.py --help

Archlinux

sudo pacman -Sy python-pyusb
git clone https://github.com/imShara/l5p-kbl
cd l5p-kbl
python l5p-kbl.py --help

Unprivileged usage

Add udev rule if you want to swith light as unprivileged user

# /etc/udev/rules.d/99-kblight.rules
SUBSYSTEM=="usb", ATTR{idVendor}=="048d", ATTR{idProduct}=="c975", MODE="0666"

or when using NixOS, in your configuration:

services.udev.extraRules = ''
  SUBSYSTEM=="usb", ATTR{idVendor}=="048d", ATTR{idProduct}=="c975", MODE="0666"
'';

Reload rules

sudo udevadm control --reload-rules && sudo udevadm trigger

Usage

Colors

I'ts possible to set color for 4 sections of keyboard separately like COLOR COLOR COLOR COLOR, but you can set single color for whole keyboard with just COLOR. Last color will be repeated for other sections.

HEX

HEX colors should be 6-digit base 16 input like ffffff

RGB

RGB colors should be 0-255 decimal values for each component, separated by comma like 255,0,127

HSV

HSV colors should be 0.0-1.0 float values for hue, saturation, value, separated by comma like 0.0,1.0,0.25

Light effect

statiс

Static color

usage: l5p_kbl.py static [-h] [--brightness {1,2}] colors [colors ...]

positional arguments:
  colors              Colors of sections

optional arguments:
  -h, --help          show this help message and exit
  --brightness {1,2}  Light brightness

Turn 100% red

./l5p_kbl.py static ff0000

At full brightness, turn 100% red for 1 section, 100% green for 2 section, 100% blue for 3 section an 100% white for 4 section

./l5p_kbl.py static ff0000 00ff00 0000ff ffffff --brightness 2

Dimmed warm orange like wire heater. With HSV color input.

./l5p_kbl.py static 0.02,1,0.2

breath

Fade light in and out

usage: l5p_kbl.py breath [-h] [--brightness {1,2}] [--speed {1,2,3,4}] colors [colors ...]

positional arguments:
  colors              Colors of sections

optional arguments:
  -h, --help          show this help message and exit
  --brightness {1,2}  Light brightness
  --speed {1,2,3,4}   Animation speed

Fast white blink at full brightness

./l5p_kbl.py breath ffffff --speed 4 --brightness 2

hue

Transition across hue circle. You can't set custom colors here.

usage: l5p_kbl.py hue [-h] [--brightness {1,2}] [--speed {1,2,3,4}]

optional arguments:
  -h, --help          show this help message and exit
  --brightness {1,2}  Light brightness
  --speed {1,2,3,4}   Animation speed

Rotate HUE slowly

./l5p_kbl.py hue --speed 1

wave

Rainbow wawe effect. Wow. Cool. Useles.

usage: l5p_kbl.py wave [-h] [--brightness {1,2}] [--speed {1,2,3,4}] {ltr,rtl}

positional arguments:
  {ltr,rtl}           Direction of wave

optional arguments:
  -h, --help          show this help message and exit
  --brightness {1,2}  Light brightness
  --speed {1,2,3,4}   Animation speed

Wheeee, left to right

./l5p_kbl.py wave ltr

Pew-pew-pew, right to left

./l5p_kbl.py wave rtl --speed 4

off

Turn light off. Nuff said.

usage: l5p_kbl.py off [-h]

optional arguments:
  -h, --help  show this help message and exit

Recommendations

Set Super+Space keystroke to turn light on and turn it off with single fn+Space press

TODO

• Minimum viable product
• HSV color input
• Create setupscript
• Create Archlinux AUR package
• Advanced usage:
  • Swithc light depend on keyboard layout
  • Switch light depend on terminal rights
  • Music light accompaniment

Payload description

Device vendor = 048d, product = c975

HEADER ........... cc
HEADER ........... 16
EFFECT ........... 01 - static / 03 - breath / 04 - wave / 06 - hue
SPEED ............ 01 / 02 / 03 / 04
BRIGHTNESS ....... 01 / 02
RED SECTION 1 .... 00-ff
GREEN SECTION 1 .. 00-ff
BLUE SECTION 1 ... 00-ff
RED SECTION 2 .... 00-ff
GREEN SECTION 2 .. 00-ff
BLUE SECTION 2 ... 00-ff
RED SECTION 3 .... 00-ff
GREEN SECTION 3 .. 00-ff
BLUE SECTION 3 ... 00-ff
RED SECTION 4 .... 00-ff
GREEN SECTION 4 .. 00-ff
BLUE SECTION 4 ... 00-ff
UNUSED ........... 00
WAVE MODE RTL .... 00 / 01
WAVE MODE LTR .... 00 / 01
UNUSED ........... 00
UNUSED ........... 00
UNUSED ........... 00
UNUSED ........... 00
UNUSED ........... 00
UNUSED ........... 00
UNUSED ........... 00
UNUSED ........... 00
UNUSED ........... 00
UNUSED ........... 00
UNUSED ........... 00
UNUSED ........... 00
UNUSED ........... 00