Contributing

GB-Link is an open-source project. Contributions are welcome across firmware, web clients, hardware, and documentation.

Repositories#

How to contribute#

Firmware#

1. Fork GBLink-Firmware
2. Create a feature branch
3. Make your changes and test on hardware
4. Open a pull request with a clear description

See Building from Source for the development setup.

Web clients#

Web clients live in the GB-Link GitHub organization. Each game/tool has its own repository. Open issues or PRs on the relevant repo.

Hardware#

DIY PCB designs are available now:

• Pico PCB
• Pico Zero PCB

GB-Link USB V2 schematics and case files will be released under CERN-OHL-S v2 when units ship.

Documentation#

Improve this documentation site by submitting PRs or opening issues. Pages are Markdown files in the content/docs/ directory.

Community#

• Discord: discord.gg/UY3KXEjmxm
• Website: gblink.io
• YouTube: @gblinkio

Acknowledgments#

GB-Link grew from many community contributions, including:

• Stacksmashing — original Tetris online implementation
• Lorenzooone — first CLI implementation for Gen 1–2 trading online
• Celio-Link — original GBA online firmware (Pokémon Gen 3)
• Goppier — local trade device that inspired GBA MCU connectivity

Code of conduct#

Be respectful and constructive. The Discord server is the best place for questions, show-and-tell, and coordination.

Safety note for hardware contributors#

When working with voltage selection pins: do not pull both GP11 and GP12 low at the same time. This can damage the board.