Custom firmware overlay for Anycubic Kobra 3D printers, plus the tools and apps that grew up around it. Free and open-source. Maintained by a small group of contributors and a much larger community of users.
| Model | Status |
|---|---|
| Kobra 2 Pro (K2P) | Supported |
| Kobra 3 (K3) | Supported |
| Kobra 3 Combo (K3 + ACE) | Supported |
| Kobra 3 V2 (K3V2) | Supported |
| Kobra 3 V2 Combo | Supported |
| Kobra 3 Max (K3M) | Supported |
| Kobra 3 Max Combo | Supported |
| Kobra S1 (KS1) | Supported |
| Kobra S1 Combo | Supported |
| Kobra S1 Max (KS1M) | Supported |
| Kobra S1 Max Combo | Supported |
| Kobra X (K4Pro) | Not supported (RSA signature verification) |
Detailed firmware version compatibility lives in the main repository README.
- New users: read the quick start guide on the docs site
- Looking for stock Anycubic firmware: see the firmware archive
- Want to dig into how it works: firmware internals docs
- Rinkhals -- the firmware overlay itself, plus the documentation site source
- Rinkhals.Apps -- community-maintained apps that extend your printer with remote access, networking, AI monitoring, and more. Pre-built SWU packages are available on the releases page
- Rinkhals.Firmwares -- manifests for stock Anycubic firmware releases used by the auto-update system
- GitHub Discussions for questions, ideas, and show-and-tell
- Issue tracker for bug reports
- Discord: see the link in the main repo README
Pull requests are welcome. See CONTRIBUTING for guidelines and CODE_OF_CONDUCT for community expectations.
If you find a bug, please use the bug report template and include a debug bundle. Instructions for generating one are here.
Rinkhals exists because of Julien Batonnet (@jbatonnet), who built and maintained the original project for years. This organization is a continuation of that work with broader maintainership.
Thanks also to every contributor who has filed an issue, sent a PR, tested a build, or written documentation.
MIT for original Rinkhals code. Bundled third-party components retain their own licenses. See the LICENSE file for details.