Setting up SimplyPrint on Anycubic Kobra 3

Easy steps to connect your Anycubic Kobra 3 3D printer to SimplyPrint.

Anycubic Kobra 3 image
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  • 1 Rinkhals firmware
  • 2 Enable SimplyPrint

Before You Start: Custom Firmware

Your Anycubic Kobra requires custom firmware to work with SimplyPrint.

We know that sounds technical — and it is one of the more involved setups — but we've worked hard to make it as straightforward as possible.

Why is custom firmware needed?

Some printer manufacturers don't provide an easy way for platforms like SimplyPrint to communicate with their printers. The community has developed alternative firmware that unlocks these capabilities.

Is this safe?

Yes! The firmware is developed by active communities, can typically be removed, and preserves your printer's core functionality. You can usually roll back or factory reset if needed.

A note about warranty

Some manufacturers may consider custom firmware a warranty modification. The risk is low — to date, we haven't had a single known case of a SimplyPrint user damaging their printer or being denied warranty repair because of this setup.

That said, it's ultimately your choice to proceed.

Estimated time: 15–30 minutes

We'll guide you through every step.

Welcome to the Anycubic Kobra setup guide for SimplyPrint!

In this guide, we'll walk you through the steps to connect your Anycubic Kobra to SimplyPrint using Rinkhals, a custom firmware that enhances functionality while maintaining stock Anycubic features.

This guide is inspired by the excellent work of jbatonnet. For the latest updates and more detailed information, please visit the official Rinkhals GitHub repository.

Supported Printers

This guide currently supports the following Anycubic Kobra models:

  • Kobra 3 V2 (+ combo). Tested firmware versions: 1.0.7.3 - 1.0.9.7.
  • Kobra 3 Max (+ combo). Tested firmware versions: 2.4.8.4 - 2.5.0.9.
  • Kobra 3 (+ combo). Tested firmware versions: 2.4.1.9 - 2.4.4.3. Note: firmware version 2.3.7 & 2.3.7.1 are known to have some instabilities. Read more on the Rinkhals repository.
  • Kobra 2 Pro with firmware 3.1.2.3 and motherboard Trigorilla Spe B v1.0.x. 3.1.4 seems to be buggy for some people Note: firmware version 3.1.4 is known to be buggy. Read more on the Rinkhals repository.
  • Kobra S1 (+ combo). Tested firmware versions: 2.5.6.4 - 2.5.8.8

Other newer Kobra printers are not yet supported, but very well might be at some point.

Is Your Printer Not Supported?

If your Anycubic Kobra printer is not listed above, it may not be compatible with Rinkhals yet. Check back later: Newer Kobra models may be supported in the future. For updates, visit the Rinkhals GitHub repository. Using another printer? It may still be compatible with SimplyPrint using serial printing (OctoPrint setup) or a regular Klipper setup. Go back to the SimplyPrint setup guide and see other supported methods.

Installing Rinkhals Firmware and Integrating with SimplyPrint

  1. Download Rinkhals:
  1. Prepare the USB Drive:
  • Format a USB drive as FAT32.
  • Not sure how to format a USB drive? Right-click the drive on Windows and select "Format". On macOS, use Disk Utility and select "Erase" with FAT32 as the format.
  • Create a directory named aGVscF9zb3Nf on the USB drive.
  1. Install Rinkhals on the Printer:
  • Copy the update.swu file into the aGVscF9zb3Nf directory on the USB drive.
  • Plug the USB drive into the Anycubic Kobra printer.
  • You should hear a beep, indicating the printer detected the update file.
  • Wait about 20 seconds while the printer prepares the update.
  • A progress bar will appear on the screen.
  • Success: If the progress bar turns green and you hear two beeps, the printer will reboot, and Rinkhals is successfully installed.
  • Failure: If the progress bar turns red and you hear three beeps, the installation failed. However, the printer should still function normally. Check for more details in the aGVscF9zb3Nf/install.log file on the USB drive.

Now, proceed to the next step where we'll link up your printer to SimplyPrint!

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Thousands complete this setup every week. Follow each step carefully - most issues come from skipping ahead.

Why some setups are tricky: Some manufacturers lock down their printers, requiring workarounds like custom firmware. If hardware is listed as required, there's no shortcut.

About support: Direct setup support is available for Enterprise & School plans. Our AI support bot can help everyone else just as effectively.

Community help: Join our Discord for community support and tips from other users.

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That's it! You're all set

You're now ready to connect your printer and start using SimplyPrint.

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