# Blue Star AC → ESPHome: reconstructing the Wi-Fi port protocol

> Blue Star AC → ESPHome reconstructs the UART protocol of Blue Star smart-ready air conditioners and implements local control on an ESP32-C3. Its ESPHome component completes the Tuya MCU handshake, exchanges Blue Star DP101 key/value records and exposes climate controls to Home Assistant for tested IE518TNUR and IA318MXU models.

- 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/Vikk20/bluestar-ac-esphome>
- Primary source: <https://github.com/Vikk20/bluestar-ac-esphome/blob/123ad202684c27476d1b859606685f4fc4a29b8c/README.md>
- Catalog page: <https://awesomerea.org/resources/blue-star-ac-esphome-case/>
- Record JSON: <https://awesomerea.org/resources/blue-star-ac-esphome-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/blue-star-ac-esphome-case/index.md)

## Requirements & limits

- **Prerequisites:** A tested Blue Star IE518TNUR or IA318MXU unit with an ESP32-C3, 4-pin connector and voltage divider.
- **Prerequisites:** ESPHome 2026.10 with the ESP-IDF framework.
- **Limits:** Other Blue Star models are unconfirmed.
- **License:** MIT license.

## Primary sources

1. <https://github.com/Vikk20/bluestar-ac-esphome/blob/123ad202684c27476d1b859606685f4fc4a29b8c/README.md>
2. <https://github.com/Vikk20/bluestar-ac-esphome/blob/123ad202684c27476d1b859606685f4fc4a29b8c/docs/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.