EasyAVR is a keyboard firmware and keymapper GUI for custom keyboards based on USB AVRs. It is powerful but also really easy to use. It supports a wide variety of custom PCBs, such as Phantom, GH60, and bpiphany’s Costar replacement controllers. It also features several advanced functions not found on retail keyboards.
The homepage for this package may be found at the following URLs:
If you need help, read the these documents first. If you can’t find a solution, post your question in the Geekhack thread or report an issue in the GitHub project.