what software is used for the board?  

RE: what software is used for the board?

To flash firmware to your printer, you need:

Computer running Windows, macOS or LinuxUSB cable, preferably the original cable that came with your printerPrusaSlicer and printer driver have been installed (download here)To check which firmware version you have on the printer, power it on and go to LCD menu -> Support. Scroll down and you will see the firmware version. The procedure for installing an older (downgraded) firmware version is exactly the same.

I found this process on the website. You can try it out.

RE: what software is used for the board?

Hey,

If you're looking for the firmware for the MMU2 board and only find MMU2S files on the Prusa website, it might be because MMU2 and MMU2S are different versions, and their firmware files are often mixed up. To get the correct firmware for the MMU2, try checking the official Prusa forums or contacting Prusa support directly. Sometimes firmware files are available in their community resources or through support channels that aren't immediately obvious on their main website. Additionally, ensure you're looking in the correct section for firmware releases specific to your hardware version.

RE: what software is used for the board?

Here are the old MMU2 Firmware releases: https://github.com/prusa3d/MM-control-01/releases

RE: what software is used for the board?

Besides that, check: https://forum.prusa3d.com/forum/original-prusa-i3-mmu2s-mmu2-general-discussion-announcements-and-releases/original-prusa-i3-mmu2s-vs-mmu2-important-links/