ZMK Firmware is an open source (MIT) keyboard firmware built on the Zephyr™ Project Real Time Operating System (RTOS). ZMK's goal is to provide a modern, wireless, and powerful firmware free of licensing issues.
Check out the website to learn more: https://zmk.dev/
You can also come join our ZMK Discord Server
To review features, check out the feature overview. ZMK is under active development, and new features are listed with the enhancement label in GitHub. Please feel free to add 👍 to the issue description of any requests to upvote the feature.
This fork contains hacks so I can play around with SparkFun Pro Micro RP2040 based microcontrollers on my keyboards.
This is pointing at a fork of Zephyr with patches pulled in to make that possible, and also an out-of-tree board definition.