# atmos-lcd: a replacement client for the MasterLiquid Atmos II LCD

> atmos-lcd is a Windows client for the Cooler Master MasterLiquid Atmos II LCD built around a reverse-engineered USB HID protocol. It controls screen content, brightness, rotation, and stored media; the repository documents handshake and command framing and includes a C# probe and packet-capture parser.

- Type: Case study
- Targets: Protocol
- Category: Independent reconstruction cases
- Relationship: Independent reconstruction project
- Sources reviewed: 2026-11-06
- Added to the catalog: 2026-11-08
- Original resource: <https://github.com/KastanEr/atmos-lcd>
- Primary source: <https://github.com/KastanEr/atmos-lcd/blob/2e65f04b503ac6176f3f2c3375fe7cfd42fdd9a5/README.md>
- Catalog page: <https://awesomerea.org/resources/atmos-lcd-case/>
- Record JSON: <https://awesomerea.org/resources/atmos-lcd-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/atmos-lcd-case/index.md)

## Requirements & limits

- **Prerequisites:** Windows 10 2004 or later, 64-bit, and a MasterLiquid Atmos II LCD device.
- **Prerequisites:** GPU temperature display requires a WDDM 2.7+ graphics driver; MasterCTRL must be closed before use.
- **License:** MIT license; the bundled Slint backend and Pretendard fonts retain their separate licenses.

## Primary sources

1. <https://github.com/KastanEr/atmos-lcd/blob/2e65f04b503ac6176f3f2c3375fe7cfd42fdd9a5/README.md>
2. <https://github.com/KastanEr/atmos-lcd/blob/2e65f04b503ac6176f3f2c3375fe7cfd42fdd9a5/PROTOCOL.md>

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## About this entry

The description was reviewed against primary sources.
Original editorial content: MIT. Linked projects, papers and assets retain their own rights and licenses.