Unable to send files to Mk2.5S printer unless gcode compiled for a MK2.5
 
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[Solved] Unable to send files to Mk2.5S printer unless gcode compiled for a MK2.5  

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struthers
(@struthers)
Member
Unable to send files to Mk2.5S printer unless gcode compiled for a MK2.5

Hi,

I am unable to send files to Prusa Connect for my Mk2.5S printers unless I compile the gcode in PrusaSlicer for a MK2.5 (non S). I am not sure where the issue lies here, this is just the workaround that I have found, but because the files are generated for a different printer than the printer I am printing them on, I am forced to walk to the printer to manually accept the warning that I am trying to print a file for a different printer.

Also I am unable to use EasyPrint as my printers are marked as "Unsupported", but I am not sure if that is because the MK2.5S is not supported.

Worth noting that both PrusaLink and Prusa Connect are correctly identifying my printers as MK2.5S printers.

PrusaLink type: Raspberry Pi 4
PrusaLink: 0.8.1
Printer type: Original Prusa i3 MK2.5S
Printer UUID: f1d680ec-69c5-4e08-a2a2-1e173a68e19d and d293aed8-7f3f-49e5-9b32-84d078384b07
Printer firmware version: 3.14.1-8237
PrusaSlicer version: 2.9.3
Description of the bug:

  1. Slice Model in PrusaSlicer for a Mk2.5S
  2. Choose "Send to Connect" and a box appears with no compatible printers (image attached)
  3. Now slice model for MK2.5 instead
  4. Choose "Send to Connect" and a box appears with both of my MK2.5S printers (image attached)

Best Answer by Yoyo:

I've raised the bug to Prusa support this morning and it's already fixed !

Happy printing 🌈

Posted : 14/09/2025 5:27 pm
struthers
(@struthers)
Member
Topic starter answered:
RE: Unable to send files to Mk2.5S printer unless gcode compiled for a MK2.5

Forgot to mention that if I upload the files manually to Prusa Connect, if they are sliced for a MK2.5S, they can not be sent to the printers, but files sliced for MK2.5 can.

Posted : 14/09/2025 8:27 pm
Yoyo
 Yoyo
(@yoyo-3)
Eminent Member
RE: Unable to send files to Mk2.5S printer unless gcode compiled for a MK2.5

Hello,

I have the exact same issue.
I contacted Prusa support and they told me to re-flash my Raspberry Pi 3B.

Of course, I didn't do it because it won't fix anything 😅

I think the bug is on Prusa Connect side.

Posted : 15/09/2025 9:23 am
Yoyo
 Yoyo
(@yoyo-3)
Eminent Member
RE: Unable to send files to Mk2.5S printer unless gcode compiled for a MK2.5

I've raised the bug to Prusa support this morning and it's already fixed !

Happy printing 🌈

Posted : 15/09/2025 2:28 pm
struthers
(@struthers)
Member
Topic starter answered:
RE: Unable to send files to Mk2.5S printer unless gcode compiled for a MK2.5

Amazing thanks very much for raising it with them. Its working perfectly for me now as well. Easy Print is also working which is a bonus

Posted : 15/09/2025 9:27 pm
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