LumiControl

Monitor Brightness Control for Windows - Control brightness for all connected monitors using DDC/CI protocol.

Developed by kcgdz

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Features

• Multi-Monitor Support - Detect and control all connected monitors (internal + external)
• DDC/CI Protocol - Uses industry-standard DDC/CI via Windows Physical Monitor API
• WMI Integration - Controls internal laptop displays via WMI
• Brightness Profiles - Save and switch between named brightness configurations (Gaming, Night Mode, Work, etc.)
• Scheduled Brightness - Time-based automatic brightness rules with smooth transitions
• Sunrise/Sunset Detection - Automatically adjust brightness based on time of day
• Global Hotkeys - Configurable keyboard shortcuts for quick brightness changes
• System Tray - Runs minimized with quick access from the notification area
• Monitor Hot-Plug - Automatically detects when monitors are connected or disconnected
• Modern Dark UI - Beautiful dark theme with smooth animations
• Mock Mode - Test the app without real monitors using --mock flag

Screenshots

Coming soon

Requirements

• OS: Windows 10 / Windows 11
• Runtime: .NET 8.0 Runtime
• Monitors: DDC/CI compatible monitors for external display control

Note: Not all monitors support DDC/CI. If your external monitor doesn't respond to brightness changes, check if DDC/CI is enabled in your monitor's OSD settings. Internal laptop displays are controlled via WMI and should always work.

Installation

Portable (no install)

1. Download LumiControl-portable.zip from Releases
2. Extract to any folder
3. Run LumiControl.exe

Self-Contained EXE

1. Download LumiControl.exe from Releases
2. Run directly - no .NET runtime needed

Build from Source

git clone https://github.com/kcgdz/LumiControl.git
cd LumiControl
dotnet restore
dotnet build
dotnet run --project LumiControl

Usage

Mock Mode (Testing)

Run without real monitors:

LumiControl.exe --mock

Keyboard Shortcuts

Configure global hotkeys in Settings to quickly adjust brightness without opening the app.

Profiles

1. Adjust brightness for each monitor
2. Click the profile dropdown and save current settings
3. Switch profiles from the system tray or main window

Scheduled Brightness

Enable auto-schedule to have brightness change automatically based on time of day.

Architecture

LumiControl.sln
├── LumiControl/              # WPF application (UI layer)
│   ├── Views/                # XAML windows
│   ├── ViewModels/           # MVVM view models
│   ├── Models/               # UI-specific models
│   ├── Services/             # App-level services
│   ├── Converters/           # XAML value converters
│   └── Resources/            # Themes, assets
├── LumiControl.Core/         # Core library
│   ├── Models/               # Domain models
│   ├── Services/             # Business logic services
│   └── Native/               # P/Invoke declarations
└── LumiControl.Tests/        # Unit tests (xUnit)

DDC/CI Compatibility

DDC/CI (Display Data Channel / Command Interface) is a standard for communication between a computer and a monitor. Most modern monitors support it, but it may be disabled by default.

To enable DDC/CI on your monitor:

1. Open your monitor's OSD menu
2. Find "DDC/CI" setting (usually under System or Settings)
3. Set it to "On" or "Enabled"

Known compatible connections:

• HDMI
• DisplayPort
• DVI
• VGA (limited support)

Known limitations:

• USB-C/Thunderbolt docks may not pass DDC/CI commands
• Some gaming monitors disable DDC/CI during certain modes
• Virtual/remote displays are not supported

Contributing

Contributions are welcome! Please:

1. Fork the repository
2. Create a feature branch (git checkout -b feature/amazing-feature)
3. Commit your changes (git commit -m 'Add amazing feature')
4. Push to the branch (git push origin feature/amazing-feature)
5. Open a Pull Request

License

This project is licensed under the MIT License - see the LICENSE file for details.

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Developed with care by kcgdz