# Minisforum MS-A1: reconstructing embedded-controller sensor access

> Minisforum MS-A1 EC fan / temperature driver documents the embedded controller's sensor command exchange and implements a Linux hwmon module for CPU temperature, board temperature and three fan RPM readings. The investigation records direct port I/O at 0x6C and 0x68, the 0xDD temperature and 0xD5 fan commands, and a command sweep used to examine the available interface.

- 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/Gitii/ms-a1-fan-controller>
- Primary source: <https://github.com/Gitii/ms-a1-fan-controller/blob/e5a2187af9507e71e1e9625ecff928fe43b6b885/docs/FINDINGS.md>
- Catalog page: <https://awesomerea.org/resources/ms-a1-ec-case/>
- Record JSON: <https://awesomerea.org/resources/ms-a1-ec-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/ms-a1-ec-case/index.md)

## Requirements & limits

- **Prerequisites:** A Minisforum MS-A1 and Linux kernel build environment are required for the driver.
- **Prerequisites:** Secure Boot installations require module signing and one-time MOK enrollment.
- **Scope:** The driver exposes read-only sensors; it does not control fan speed.
- **License:** Licensed under GPL-2.0.

## Primary sources

1. <https://github.com/Gitii/ms-a1-fan-controller/blob/e5a2187af9507e71e1e9625ecff928fe43b6b885/docs/FINDINGS.md>
2. <https://github.com/Gitii/ms-a1-fan-controller/blob/e5a2187af9507e71e1e9625ecff928fe43b6b885/README.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.