# Home Assistant ↔ Gammy Bridge

A simple Python MQTT bridge to control [Gammy](https://github.com/Fushko/gammy) (open-source adaptive screen brightness/color temperature tool for Windows) from Home Assistant.

This lets you:
- Trigger **Ember mode** (~1900K, dim) when your house goes into sleep mode.
- Trigger **Movie mode** (6500K, bright) when watching movies.
- Toggle **Auto mode** (Gammy’s circadian cycle) for normal use.
- Send custom temperature + brightness commands from HA.
- Query the current state back into Home Assistant.

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## 🚀 Features
- MQTT topic subscription: `pc/gammy/mode`
- Supported commands:
  - `ember [snap|fast|slow]`
  - `movie [snap|fast|slow]`
  - `auto [snap|fast|slow]`
  - `custom <temperature> <brightness> [snap|fast|slow]`
- Publishes current state to: `pc/gammy/state`
- Fade support (`snap=0s`, `fast=1s`, `slow=30s`)

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## 📂 Files
- `gammy_mqtt.py` → Main script.
- `requirements.txt` → Python dependencies.

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## ⚡ Installation
1. Install [Python](https://www.python.org/downloads/) (Windows).
2. Install requirements:
   ```bash
   pip install -r requirements.txt