Open-source technical declaration.
CoolerLCD is an independent open-source interoperability project providing native Windows support for USB HID cooler LCD screens using the 5131:2007 controller. The Windows build runs as a system service via NSSM.
The project targets CPU cooler LCD displays sold under multiple brands and rebrands, including Vevor YC-01-SS-002 compatible units. Its Windows build lets users display system information — CPU temperature, GPU temperature, fan speed, pump speed, memory usage and time — directly on the cooler screen, without keeping a vendor application open in the background.
On Windows, CoolerLCD communicates with the device through the Windows HID stack and standard HID output reports. Sensor reading is done via LibreHardwareMonitor + PawnIO for CPU MSRs and motherboard SuperIO, and via NVIDIA NVML for GPUs. It includes no vendor code, firmware, trademarks, proprietary binaries or modified vendor software. It exists strictly as an interoperability driver.
The project is designed for transparency, auditability and long-term maintenance. Protocol notes, installation steps and compatibility information are documented publicly so users can understand what the driver sends to the device and how the Windows service operates.
Primary compatibility focus
- USB HID controller: 5131:2007
- Windows 10 and Windows 11 (64-bit)
- Windows HID stack via
hidapi - NSSM service mode (auto-start, before login)
- CPU cooler LCD screens
- Vevor YC-01-SS-002 compatible LCD units
- Rebranded circular AIO cooler displays using the same HID controller
Project principles
- No vendor app required at runtime
- No proprietary vendor code included
- No telemetry
- No cloud requirement
- No auto-updates, no phone-home
- Runs headless as a Windows service (no GUI in the user session)
- Open protocol documentation where possible
Maintenance status
CoolerLCD is maintained as an open-source hardware interoperability project (Windows and Linux). Updates are published when compatibility, security, documentation or platform support improvements are required.