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Build and customize firmware for your MK3S+
Prusa’s MK3 firmware source lets you build the software that controls an Original Prusa MK3S+. It includes the printer’s calibration, motion, display and temperature-control logic, with documented build targets for supported hardware.
Choose the exact board, hotend and printer variant before compiling or flashing. This is the older MK3 firmware line; MINI, MK4, XL and CORE One use the separate Buddy firmware project.

Prusa 3D printers
MK3S+ (partly)
Choose the exact board and hotend firmware variant
How did it go? Tips, problems, questions…
Build and customize firmware for your MK3S+
Prusa’s MK3 firmware source lets you build the software that controls an Original Prusa MK3S+. It includes the printer’s calibration, motion, display and temperature-control logic, with documented build targets for supported hardware.
Choose the exact board, hotend and printer variant before compiling or flashing. This is the older MK3 firmware line; MINI, MK4, XL and CORE One use the separate Buddy firmware project.
Prusa3D
On GitHub

Prusa 3D printers
MK3S+ (partly)
Choose the exact board and hotend firmware variant
Feedback
How did it go? Tips, problems, questions…