# Gree-Wired-Proto: mapping the XK19 wired controller bus

> Gree-Wired-Proto maps the RS-485 exchange between a Gree air-conditioner indoor unit and an XK19 wired controller. It records 1200-baud 8N1 serial settings, a 7E 7E header, source and destination bytes, body lengths, XOR checksum and observed message examples.

- 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/maxim-smirnov/gree-wired-proto>
- Primary source: <https://github.com/maxim-smirnov/gree-wired-proto/blob/14168a22a55d194d11b6336461eeb1136fc710b7/README.md>
- Catalog page: <https://awesomerea.org/resources/gree-wired-proto-case/>
- Record JSON: <https://awesomerea.org/resources/gree-wired-proto-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/gree-wired-proto-case/index.md)

## Requirements & limits

- **Prerequisites:** A Gree indoor unit and compatible wired controller for observing this bus.
- **Limits:** The meaning of destination 40 remains unknown.
- **License:** GPL-3.0 license.

## Primary sources

1. <https://github.com/maxim-smirnov/gree-wired-proto/blob/14168a22a55d194d11b6336461eeb1136fc710b7/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.