leds-corsair-m65

leds-corsair-m65 is a Linux kernel driver for controlling the LED zones color on the Corsair M65 Pro mouse.

The driver exposes the following sysfs led nodes:

• /sys/class/leds/corsair_m65::dpi
• /sys/class/leds/corsair_m65::logo
• /sys/class/leds/corsair_m65::wheel

You can control the LED via the brightness file. The valid values are binary from range 0 to 0xFFFFFF which translate to RGB colors, so for example red is 0xFF0000.

Build and load

make  
sudo insmod ./leds-corsair-m65.ko

Why not do it in userspace via /dev/hidrawX?

I did at first but it wasn't that much fun, so I also did it in the kernel. ;-) Also I like the sysfs interface and the hidraw device number can change, so I prefer the kernel driver solution.

Examples

Set the logo led to red color (RGB: 0xFF0000)

printf '\xff0000' | sudo tee /sys/class/leds/corsair_m65::logo

Set the logo led to pink color (RGB: 0xFF00FF)

printf '\xff00ff' | sudo tee /sys/class/leds/corsair_m65::logo

Demo

rainbow.py is a simple Python script which utilizes the driver interface to animate the mouse leds through all hues.

demo.mov

TODO

• Find out the command (if there is any) to read the zone color to avoid hardcoding the default color
• Think how to make the nodes writable as a non-root user