# SAC9010QC/SAC12010QC: reconstructing an air-conditioner IR protocol

> SAC9010QC/SAC12010QC reconstructs the IR control format of a HomeFit Living or Alaska air-conditioner remote from captured signals. A protocol reference maps its 36-bit command fields, while an ESP8266 or ESP32 web server sends AC settings through a REST endpoint.

- Type: Case study
- Targets: Protocol
- Category: Independent reconstruction cases
- Relationship: Independent reconstruction project
- Sources reviewed: 2026-11-06
- Added to the catalog: 2026-11-09
- Original resource: <https://github.com/RobThree/SAC9010QC-SAC12010QC>
- Primary source: <https://github.com/RobThree/SAC9010QC-SAC12010QC/blob/2b837fa40a46d864223b49276194114447e5a343/protocol.md>
- Catalog page: <https://awesomerea.org/resources/sac9010qc-sac12010qc-ir-case/>
- Record JSON: <https://awesomerea.org/resources/sac9010qc-sac12010qc-ir-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/sac9010qc-sac12010qc-ir-case/index.md)

## Requirements & limits

- **Prerequisites:** An Arduino-compatible ESP8266 or ESP32 setup with an IR LED for the controller.
- **Limits:** The controller keeps its last sent state; the AC does not report its actual state back.
- **License:** MIT License.

## Primary sources

1. <https://github.com/RobThree/SAC9010QC-SAC12010QC/blob/2b837fa40a46d864223b49276194114447e5a343/protocol.md>
2. <https://github.com/RobThree/SAC9010QC-SAC12010QC/blob/2b837fa40a46d864223b49276194114447e5a343/README.md>
3. <https://github.com/RobThree/SAC9010QC-SAC12010QC/blob/2b837fa40a46d864223b49276194114447e5a343/LICENSE>

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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.