Direct Prusa Integration - custom SimplyPrint Prusa firmware setup

SimplyPrint × Prusa direct integration (beta)

This setup connects newer Prusa printers (with the latest/mainline Prusa mainboards) directly to SimplyPrint without a Raspberry Pi or OctoPrint, by flashing a small patch on top of the official Prusa firmware so the printer can talk to SimplyPrint.

Beta status and support

• This integration is currently in beta with limited support.
• We recommend most users use the OctoPrint method with a Raspberry Pi (often one per printer) for the most stable experience, faster connections/downloads and more available data.
• All support for this beta is handled exclusively in our Discord: https://simplyprint.io/discord — please use the channel #prusa-integration-beta. We don’t offer support for this method anywhere else.
• Use at own risk: we assume no liability

What you need

• A compatible Prusa model/newer mainboard (see the setup guide for the latest list)
• A USB drive (for firmware/settings transfer)
• Internet access on the printer (Wi‑Fi or Ethernet)

Basic setup (high‑level)

1. Open the setup guide here: https://simplyprint.io/setup-guide/methods/prusa-direct (going live within a couple of days)
2. Pick your exact Prusa model in the guide.
3. Download and flash the SimplyPrint-enabled Prusa firmware from the guide.

• Prusa states that flashing custom firmware does not void your warranty, but it’s done at your own risk.

4. Generate the SimplyPrint settings file in the guide, copy it to a USB drive, and load it on the printer (Settings → Network → SimplyPrint → Load Settings).
5. The printer should connect to SimplyPrint shortly after.

For full, always-up-to-date instructions (including compatible models and per-step buttons), please follow the setup guide instead of this summary: https://simplyprint.io/setup-guide/methods/prusa-direct

Why recommend the classic Pi-powered Prusa setup method

While the custom firmware method sounds, and frankly is, smart, Prusa's decision to not use more modern or powerful hardware in their latest flagship printers, instead opting for a more custom, and a little more powerful version of their old "Buddy Mainboards", cripples our ability to interact with your printer in a more smart and modern way.

While most other modern printers on the market ship with a full "Linux"-based tiny computer, often running the "Klipper" firmware, Prusa has not opted to do this - yet, at least - which means the hardware is not very powerful; the development of this firmware is tricky, time consuming and we - and Prusa - have to watch every character of code that we write for it, given the fickle nature of and the very limited amount of memory their hardware has. This means it's;

• Slow; both in terms of communicating its status and especially downloads
• Does not natively support camera streaming
• Lacks certain features such as bed leveling mesh

So, the benefits of the custom firmware is that no hardware requirement is needed; and that in itself is great and for sure a huge benefit, especially as you grow your farm, and whether that one pro outweighs all the cons is up to you - but do factor in that our custom Prusa firmware is in beta with limited support - if you find bugs, it may be a while before they're fixed as the development is expensive and tricky, and the demand isn't nearly as high as setups for other printers such as Bambu Lab.

Updated on: 21/10/2025