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Prusa is doing an amazing job on continuously improving the firmware they supply to run their 3D printers. Bondtech is also doing an amazing job, if we can say it ourselves, on adding value to the many already awesome Prusa printers. Our hardware does add something extra to the Prusa units, and because of that, we always need to sprinkle a bit of firmware magic dust to every new version Prusa releases.
This presents us, and our customers, some challenges we will try to overcome here. Below you will find several groups, each one relating to a specific Prusa Firmware version. Inside each group several tabs host the multiple versions we have prepared to be used with our products.
This list will be updated every time there is a new firmware version from Prusa, by keeping older versions on bottom, and the new on top.
Use only firmware that matches your hardware setup.
To check which firmware version you already have in your printer, power it up and in the LCD menu, go to Support. Scroll down and you will see the firmware version.
Identify your Prusa model to select the proper accordion tab inside each firmware tab;
To check which printer model you have, in the LCD menu, you will see the model name in the bottom line of the main screen.
Identify your Prusa’s mainboard version;
In the LCD menu, go to Support. and scroll down to the second line below the – – – – – – – – – – – – – – and you will see the mainboard version (eg: RAMBo10a; RAMBo13a; EINSy10a;…).
Identify any hardware setup variant you may have and relate it to the files available.
Hardware setup variants include, so far, the presence of Slice Engineering HT Thermistor . Others may be added in the Future.
About the firmware files naming
The name of the firmware file you download should match your setup.
Take the following as an example:
notice the printer model:
bondtech_fw_MK25s_RAMBo10a_3.8.1-SliceE-HT-Mosquito_Magnum
notice the mainboard model:
bondtech_fw_MK25s_RAMBo10a_3.8.1-SliceE-HT-Mosquito_Magnum
notice the base Prusa firmware:
bondtech_fw_MK25s_RAMBo10a_3.8.1-SliceE-HT-Mosquito_Magnum
notice the HT thermistor:
bondtech_fw_MK25s_RAMBo10a_3.8.1-SliceE-HT-Mosquito_Magnum
notice the Mosquito Magnum hot end:
bondtech_fw_MK25s_RAMBo10a_3.8.1-SliceE-HT-Mosquito_Magnum
If there is no mention to thermistor or hotend models, the firmware file is used to the default ones supplied by Prusa in your 3D printer.
Based on 3.9.3 Firmware for MK3, MK3S, MK3S+, MK2.5 and MK2.5S
The firmware archives you will find below are based on the Prusa release mentioned above. All updates were done by Bondtech to optimize the usage of our hardware and sometimes to tweak specific features. You may find more information on the release notes below.
MMU2S Support
This firmware release supports Bondtech customers that are using the MMU2S with Prusa i3 MK25s or MK3s, and E3D or Mosquito hotends. Expand the tab that fits your 3D printer and choose the firmware file most adjusted to your configuration.
About this release
Compiled firmware to support Bondtech Prusa i3 MK25 / MK3, MK25s / MK3s, MK25s / MK3s Mosquito
Firmware based on Prusa’s latest release with adjustments to support bondtech extruders. Please read Prusa’s release note for all changes in the new release: 3.9.3 Firmware for MK3, MK3S, MK2.5 and MK2.5S
Summary of Bondtech Specific Changes
Adjusted Load/Unload filament sequence.
MK3/MK3s: Variants for Slice Engineering’s High temperature thermistor (SE_HT-thermistor).
MK3/MK3s: Changed microstep resolution to 16.
MK3s/MK25s: Correct Z_MAX_POS adjustments to allow XYZ Calibration.
MK3s/Mk25s: Adjusted mmu.cpp to correct values for E3Dv6, Mosquito and Mosquito Magnum together with the Bondtech extruder when preforming can_load and mmu_load_to_nozzle.
Full speed enabled for custom fans.
Click the title below that best fits your setup to download the right firmware update.
Remember! The HT firmware versions should only be used with Slice’s 450C thermistors.
For Slice’s 300C thermistor, choose the non HT version.
Based on 3.9.2 Firmware for MK3, MK3S, MK2.5 and MK2.5S
The firmware archives you will find below are based on the Prusa release mentioned above. All updates were done by Bondtech to optimize the usage of our hardware and sometimes to tweak specific features. You may find more information on the release notes below.
MMU2S Support
This firmware release supports Bondtech customers that are using the MMU2S with Prusa i3 MK25s or MK3s, and E3D or Mosquito hotends. Expand the tab that fits your 3D printer and choose the firmware file most adjusted to your configuration.
About this release
Compiled firmware to support Bondtech Prusa i3 MK25 / MK3, MK25s / MK3s, MK25s / MK3s Mosquito
Firmware based on Prusa’s latest release with adjustments to support bondtech extruders. Please read Prusa’s release note for all changes in the new release: 3.9.2 Firmware for MK3, MK3S, MK2.5 and MK2.5S
Summary of Bondtech Specific Changes
Variants for Slice Engineering’s High temperature thermistor (SE_HT-thermistor).
Adjusted Load/Unload filament sequence.
MK3/MK3s: Changed microstep resolution to 16.
MK3s/MK25s: Correct Z_MAX_POS adjustments to allow XYZ Calibration.
MK3s/Mk25s: Adjusted mmu.cpp to correct values for E3Dv6, Mosquito and Mosquito Magnum together with the Bondtech extruder when preforming can_load and mmu_load_to_nozzle.
With multi language support.
Full speed enabled for custom fans.
Click the title below that best fits your setup to download the right firmware update.
Remember! The HT firmware versions should only be used with Slice’s 450C thermistors.
For Slice’s 300C thermistor, choose the non HT version.
Based on 3.9.1 Firmware for MK3, MK3S, MK2.5 and MK2.5S
The firmware archives you will find below are based on the Prusa release mentioned above. All updates were done by Bondtech to optimize the usage of our hardware and sometimes to tweak specific features. You may find more information on the release notes below.
MMU2S Support
This firmware release supports Bondtech customers that are using the MMU2S with Prusa i3 MK25s or MK3s, and E3D or Mosquito hotends. Expand the tab that fits your 3D printer and choose the firmware file most adjusted to your configuration.
About this release
Compiled firmware to support Bondtech Prusa i3 MK25 / MK3, MK25s / MK3s, MK25s / MK3s Mosquito
Firmware based on Prusa’s latest release with adjustments to support bondtech extruders. Please read Prusa’s release note for all changes in the new release: 3.9.1 Firmware for MK3, MK3S, MK2.5 and MK2.5S
Summary of Bondtech Specific Changes
Variants for Slice Engineering’s High temperature thermistor (SE_HT-thermistor).
Adjusted Load/Unload filament sequence.
MK3/MK3s: Changed microstep resolution to 16.
MK3s/MK25s: Correct Z_MAX_POS adjustments to allow XYZ Calibration.
MK3s/Mk25s: Adjusted mmu.cpp to correct values for E3Dv6, Mosquito and Mosquito Magnum together with the Bondtech extruder when preforming can_load and mmu_load_to_nozzle.
With multi language support.
Full speed enabled for custom fans.
Click the title below that best fits your setup to download the right firmware update.
Remember! The HT firmware versions should only be used with Slice’s 450C thermistors.
For Slice’s 300C thermistor, choose the non HT version.
Based on 3.9.0 Firmware for MK3, MK3S, MK2.5 and MK2.5S
The firmware archives you will find below are based on the Prusa release mentioned above. All updates were done by Bondtech to optimize the usage of our hardware and sometimes to tweak specific features. You may find more information on the release notes below.
MMU2S Support
This firmware release supports Bondtech customers that are using the MMU2S with Prusa i3 MK25s or MK3s, and E3D or Mosquito hotends. Expand the tab that fits your 3D printer and choose the firmware file most adjusted to your configuration.
About this release
Compiled firmware to support Bondtech Prusa i3 MK25 / MK3, MK25s / MK3s, MK25s / MK3s Mosquito
Firmware based on Prusa’s latest release with adjustments to support bondtech extruders. Please read Prusa’s release note for all changes in the new release: 3.9.0 Firmware for MK3, MK3S, MK2.5 and MK2.5S
Summary of Bondtech Specific Changes
Variants for Slice Engineering’s High temperature thermistor (SE_HT-thermistor).
Adjusted Load/Unload filament sequence.
MK3/MK3s: Changed microstep resolution to 16.
MK3s/MK25s: Correct Z_MAX_POS adjustments to allow XYZ Calibration.
MK3s/Mk25s: Adjusted mmu.cpp to correct values for E3Dv6, Mosquito and Mosquito Magnum together with the Bondtech extruder when preforming can_load and mmu_load_to_nozzle.
Now with multi language support.
Click the title below that best fits your setup to download the right firmware update.
Remember! The HT firmware versions should only be used with Slice’s 450C thermistors.
For Slice’s 300C thermistor, choose the non HT version.
Based on 3.8.1 Firmware for MK3, MK3S, MK2.5 and MK2.5S
The firmware archives you will find below are based on the Prusa release mentioned above. All updates were done by Bondtech to optimize the usage of our hardware and sometimes to tweak specific features. You may find more information on the release notes below.
MMU2S Support
This firmware release supports Bondtech customers that are using the MMU2S with Prusa i3 MK25s or MK3s, and E3D or Mosquito hotends. Expand the tab that fits your 3D printer and choose the firmware file most adjusted to your configuration.
Slice Engineering High Temperature Thermistor
We also made versions to support Slice Engineering high temperature thermistor. We reduced the MINTEMP threshold to allow use in colder environments. The max temp was not changed. If you are an experienced and knowledgeable user you can change the HEATER_0_MAXTEMP parameter to fit your needs. Find the source code below.
Summary of Bondtech Specific Changes
Variants for Slice Engineerings High temperature thermistor (SE_HT-thermistor)
Adjusted Load/Unload filament sequence
MK3/MK3s: Changed microstep resolution to 16
MK3s/MK25s: Changed Z_MAX_POS 205 to allow Z and XYZ calibration
MK3s/Mk25s with MMU2S: Adjusted mmu.cpp to correct values for extrusion positions on E3Dv6, Mosquito and Mosquito Magnum together with the Bondtech extruder when performing can_load and mmu_load_to_nozzle.
Click the title below that best fits your setup to download the right firmware update.
Remember! The HT firmware versions should only be used with Slice’s 450C thermistors.
For Slice’s 300C thermistor, choose the non HT version.
Based on 3.8.0 Firmware for MK3, MK3S, MK2.5 and MK2.5S
The firmware archives you will find below are based on the Prusa release mentioned above. All updates were done by Bondtech to optimize the usage of our hardware and sometimes to tweak specific features. You may find more information on the release notes below.
MMU2S Support
This firmware release supports Bondtech customers that are using the MMU2S with Prusa i3 MK25s or MK3s, and E3D or Mosquito hotends. Expand the tab that fits your 3D printer and choose the firmware file most adjusted to your configuration.
Slice Engineering High Temperature Thermistor
We also made versions to support Slice Engineering high temperature thermistor. We reduced the MINTEMP threshold to allow use in colder environments. The max temp was not changed. If you are an experienced and knowledgeable user you can change the HEATER_0_MAXTEMP parameter to fit your needs. Find the source code below.
Summary of Bondtech Specific Changes
Updated mmu.cpp to correct values for E3Dv6, Mosquito and Mosquito Magnum together with the Bondtech extruder when performing can_load and mmu_load_to_nozzle.
Changed HEATER_0_MINTEMP for Slice Engineering’s High-Temperature thermistor to reduce MINTEMP threshold.
Click the title below that best fits your setup to download the right firmware update.
Remember! The HT firmware versions should only be used with Slice’s 450C thermistors.
For Slice’s 300C thermistor, choose the non HT version.
Based on 3.8.0 Firmware for MK3, MK3S, MK2.5 and MK2.5S
The firmware archives you will find below are based on the Prusa release mentioned above. All updates were done by Bondtech to optimize the usage of our hardware and sometimes to tweak specific features. You may find more information on the release notes below.
Summary of Bondtech changes
Variants for Slice Engineerings High temperature thermistor (SE_HT-thermistor)
Adjusted Load/Unload filament sequence
MK3s: Changed Z_MAX_POS 205 to allow Z and XYZ calibration
MK3s: Changed microstep resolution to 16
Click the title below that best fits your setup to download the right firmware update.
Remember! The HT firmware versions should only be used with Slice’s 450C thermistors.
For Slice’s 300C thermistor, choose the non HT version.
Based on 3.7.2 Firmware for MK3, MK3S, MK2.5 and MK2.5S
The firmware archives you will find below are based on the Prusa release mentioned above. All updates were done by Bondtech to optimize the usage of our hardware and sometimes to tweak specific features. You may find more information on the release notes below.
Summary of Bondtech changes
E-step set to 830.
Z_MAX_POS 204 to allow Z and XYZ calibration.
Changed printer name.
Click the title below that best fits your setup to download the right firmware update.
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Prusa i3 MK3S+/MK3S / MK2.5S Mosquito
1 × €121.40 
Prusa i3 MK3S+/MK3S / MK2.5S Mosquito 
Mosquito hotend 
Mosquito Boron Nitride Paste 
SLS X-Carriage kit for Prusa i3 MK3S 
Mosquito 24V 50W heater 
Torque Wrench 1,5 Nm 