QcKPrism is a small cross-platform CLI utility for controlling the RGB lighting of a SteelSeries QcK Prism Cloth XL mousepad. SteelSeries does not provide an official Linux tool, so this project offers basic control without the need for SteelSeries Engine.

Currently the project targets a single device:

• Vendor ID: 0x1038
• Product ID: 0x150d

Other SteelSeries devices have not been tested.

This repository contains only Rust code, so building the project is as simple as:

cargo build --release

qckprism [OPTIONS] --color1 <HEX> --color2 <HEX>

• -a, --color1 <HEX> – Sets LED1 color in hex (e.g. FF00FF)
• -b, --color2 <HEX> – Sets LED2 color in hex (e.g. FF00FF)
• -l, --light <LIGHT> – Sets light level (0‑255)
• -h, --help – Prints help information
• -V, --version – Prints version information

The color flags are required and currently only static lighting is supported.

• Running the utility may require sudo. To allow regular users to access the device, create a udev rule at /etc/udev/rules.d/75-qck-prism.rules with the following contents:

  SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="150d", TAG+="uaccess"
  

  Reload udev rules or replug the device after creating the file.

• Although the utility compiles on macOS, it typically fails with Error: Access because the HID device is claimed by the kernel. A custom kernel extension would be required to claim the device before the system does. See tessel/node-usb#30 for more information.