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[Sticky] Firmware 3.2.3 for Original Prusa i3 MK2/S & MMU1  

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Jakub Dolezal
(@jakub-dolezal-2)
Admin
Firmware 3.2.3 for Original Prusa i3 MK2/S & MMU1

Hi guys,
This firmware 3.2.3 is the final version of firmware version 3.2.2 RC1 for MK2/S, which contains important safety improvement in preheat error and also chosen features from MK3S branch.

What is new?

  • Preheat error improved
  • Improved temperature regulation
  • Remaining time estimation
  • Adjustable beeper notifications
  • Incomplete file check updated
  • G-code fixes (M27, M110, M115)

A detailed description of changes:

Stop after Pause (fixed)

We found and fixed a bug that led to improper print termination when Pause print and Stop print commands were executed in quick succession.

Preheat error improved:

On older firmware version there was a zone where preheat error was not working properly. If thermistor would be damaged during the preheating phase in a particular way (resistance of damaged thermistor would be in the range corresponding to the measured temperature > 150 °C), preheat error was not triggered.
Improved preheat error now works in full range. MK2/S implementation also contains update which should prevent false bed preheat error occurrence.

Improved temperature regulation:

When changing temperatures during the print, temperature regulation was very slow in some cases. Regulation has been improved.

Remaining time estimation:

The current firmware version is ready to display remaining time estimation and accurate progress on printer status screen. Information about remaining time will be counted by Slic3r and inserted into G-code file. Gcode M73 is used for this. In this case, the letter 'R' is shown next to print time to indicate that it is remaining time estimation. For speed factor different than 100 %, time estimation may not be accurate, which is then indicated by the letter '?'. In case that there are no M73 G-codes in a file, printer behaves as in previous release versions, i.e. showing time from the print start. The status screen was slightly modified because of this feature. Symbol "SD" is now shown on printer status screen only during active SD print (i.e. not in idle state) together with progress in percentage. When printing over USB, there is a "USB" symbol shown together with progress in percentage.

It is possible to turn on/off estimated print time support in Slic3r by switching to expert mode and clicking on "Supports remaining time" check-box in Slic3r Printer Settings -> General. In future versions of Slic3r settings,

Adjustable beeper notifications:

In Prusa MK3S/MK2.5S firmware there are different levels of the acoustic signalization (since 3.4.0 firmware version). This feature has been ported to MK2/S firmware. User is able to choose between each level in the printer's menu -> Settings –> Sound. You can also change the sound settings during the print in the menu -> Tune.

Level description:

Loud - printer uses acoustic signalization for failure or if confirmation is needed
Once - this level is similar to Loud, but all beeps are played only once.
Silent - most of the beeps are muted, the user is informed only in case of a serious error

Mute option (all beeps muted, used in MK3S/MK2.5S printers from 3.4.0 release) has been excluded for safety reasons.

Incomplete file check updated:

Last firmware 3.1.0 for MK2/S can falsely report that printed G-code file is incomplete. This was happening typically with G-code files generated in new Prusa Slic3r versions. This has been fixed.

G-code fixes:

G-codes which are used to report printer status (M27), machine type and firmware version (M115) and to set line number (M110) when printing remotely (for example using Octoprint) have been fixed.

Other:

  • Translation correction
  • Stop print fix

---

Supported printers:

  • Original Prusa i3 MK2/S MMU1
  • Original Prusa i3 MK2/S

Download link:

prusa3d.com/drivers/

Firmware flashing guide:

https://manual.prusa3d.com/Guide/Upgrading+the+firmware/66

Please report any bug here:

https://github.com/prusa3d/Prusa-Firmware/issues

 

As always, we wish you happy printing and look forward to your feedback!

Assembly manuals / Knowledge Base
The guy behind Prusa assembly manuals......
Posted : 10/06/2019 12:51 pm
JC
 JC
(@jc-4)
New Member
RE: Firmware 3.2.3 for Original Prusa i3 MK2/S & MMU1

What version of Marlin does this firmware use? 

Posted : 19/11/2020 4:40 am
GavBak liked
GavBak
(@gavbak)
Active Member
RE: Firmware 3.2.3 for Original Prusa i3 MK2/S & MMU1

Why is my i3 Mk2 telling me there is a 3.9.1 firmware available currently.   If you read down the thread there are more people with this issue.   It started when I updated my slicer in the last two days and is probably an error, but I would like to know.

Posted : 13/01/2021 5:47 am
JTRACKER
(@jtracker)
New Member
RE: Firmware 3.2.3 for Original Prusa i3 MK2/S & MMU1

Will there be an answer provided to this post from January 2021?

Posted : 06/05/2021 3:36 pm
bobstro
(@bobstro)
Illustrious Member
RE: Firmware 3.2.3 for Original Prusa i3 MK2/S & MMU1
Posted by: @jtracker

Will there be an answer provided to this post from January 2021?

Has anybody opened a trouble ticket on the Prusa github pages? That's the most effective place to flag any problems that you want the developers to address. This is just a user-user support site, and you're unlikely to get any attention from the developers here no matter how long ago it was posted. In the meantime, you can edit or remove this line from your startup gcode:

M115 U3.9.3 ; tell printer latest fw version

Personally, I just disable the warnings on the printer.

Just took a look, and it does look like firmware 3.9.3 is available for the Mk2.5. Have you updated?
 

My notes and disclaimers on 3D printing and miscellaneous other tech projects
He is intelligent, but not experienced. His pattern indicates two dimensional thinking. -- Spock in Star Trek: The Wrath of Khan...
Posted : 06/05/2021 5:33 pm
Cipis
(@cipis)
Honorable Member
RE: Firmware 3.2.3 for Original Prusa i3 MK2/S & MMU1
Posted by: @gavbak

Why is my i3 Mk2 telling me there is a 3.9.1 firmware available currently.   If you read down the thread there are more people with this issue.   It started when I updated my slicer in the last two days and is probably an error, but I would like to know.

It is most likely a user error, incorrect printer profile selected in PrusaSlicer (like MK2.5 instead of MK2S).

...
Posted : 06/05/2021 7:05 pm
Daniel B
(@daniel-b)
New Member
RE: Firmware 3.2.3 for Original Prusa i3 MK2/S & MMU1

The firmware option is no longer here ( https://help.prusa3d.com/en/tag/mk2s/ ). Where can I find it?

Posted : 18/11/2021 4:02 pm
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