HBlink4 is the next evolution of the HBlink DMR Master Server implementation using the HomeBrew protocol, developed by Cort Buffington, N0MJS. This version represents a complete architectural redesign, moving from a master-centric to a repeater-centric model for more granular control and management of connected systems.

Key Architectural Changes

Elimination of peer mode - HBlink4 operates purely as a master server
Individual repeater management rather than master-level system management
Direct repeater registration without binding to specific master instances
Granular per-repeater control and monitoring

Features

Modern Python implementation with type hints
Improved error handling and logging
JSON-based configuration
Enhanced repeater management
Built on Twisted framework for reliable async operation

Installation

Clone this repository:

git clone https://github.com/yourusername/HBlink4.git
cd HBlink4

Create a virtual environment and activate it:

python3 -m venv venv
source venv/bin/activate  # On Windows: venv\Scripts\activate

Install requirements:

pip install -r requirements.txt

Configuration

Copy the example configuration file and modify it for your needs:

cp config/hblink.json config/my_hblink.json

Edit the configuration file to set up your access control, repeater options, and routing rules. For detailed configuration instructions, see the Configuration Guide.

Running

To start HBlink4:

python3 hblink4/hblink.py config/my_hblink.json

The server will start and listen for repeater registrations on the configured bind_ip and bind_port.

Configuration

The configuration file uses JSON format and supports extensive customization of server behavior, access control, and routing rules. For detailed configuration instructions and examples, see the Configuration Guide.

Contributing

Contributions are welcome! Please feel free to submit a Pull Request. Do not submit a Pull Request to the main branch for added features without consultation first. Added features may collide with other mainline features under development. Use alternative branches named for the feature being added.

License

This project is licensed under the GNU GPLv3 License - see the LICENSE file for details.

Acknowledgments

Original HBlink3 by Cort Buffington, N0MJS
The MMDVM and DMR community