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Firmware 3.4.1-FINAL for Original Prusa i3 MK2.5  

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Jakub Dolezal
(@jakub-dolezal-2)
Admin
Firmware 3.4.1-FINAL for Original Prusa i3 MK2.5

Hi guys,
new firmware 3.4.1 is out! This is a final release recommended to all users 😉

What is new?
This release is focused on further improving the filament sensor reliability, lowering the number of false detections and fixing several critical bugs.
The changelog is the same as for 3.4.1-RC1:

Stealth mode fixed
This issue manifests itself as slow Z-axis movements. This was caused by a bug in storing custom values to EEPROM (M500 and M501 G-codes). These two G-codes were updated to avoid a similar issue in the future.

"The filament sensor response is poor, disable it?" temporarily disabled
This was a new feature introduced with filament sensor engine 2.0. Unfortunately, this feature seems to be too sensitive and unreliable so we disabled it for now and we are working on the improved version of it.

Bug fixes
- Filament runout detection bug #1154 fixed
- Stealth mode bug #1152 fixed
- Statistics during active print bug #1151 fixed
- OctoPrint "Printer reset detected" warning #1184 issue fixed

Supported printers:
Original Prusa i3 MK3
Original Prusa i3 MK3 Multi Material 2.0
Original Prusa i3 MK2.5

Download link:
https://www.prusa3d.com/drivers/

Previous releases:
3.4.1-RC1 https://github.com/prusa3d/Prusa-Firmware/releases/tag/v3.4.1-RC1

Firmware flashing guide:
http://manual.prusa3d.com/Guide/Upgrading+firmware+v1.2/66?lang=en
Note: Use Slic3r PE 1.41.0 or latest to flash the MMU2

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!

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Posted : 05/10/2018 10:59 am
daniel.d21
(@daniel-d21)
Active Member
Re: Firmware 3.4.1-FINAL for Original Prusa i3 MK2.5

Since this version Octoprint refused to connect. It seems the firmware doesn't send an "ok" anymore.

The serial log shows:


Connecting to: /dev/ttyACM0
Changing monitoring state from "Offline" to "Opening serial port"
Connected to: Serial<id=0x73024e30, open=True>(port='/dev/ttyACM0', baudrate=115200, bytesize=8, parity='N', stopbits=1, timeout=3.0, xonxoff=False, rtscts=False, dsrdtr=False), starting monitor
Changing monitoring state from "Opening serial port" to "Connecting"
Send: N0 M110 N0*125
Recv: echo: 3.4.1-1356
Recv: echo: Last Updated: Oct 4 2018 17:44:04 | Author: (none, default config)
Recv: Compiled: Oct 4 2018
Recv: echo: Free Memory: 2045 PlannerBufferBytes: 1392
Recv: echo:Hardcoded Default Settings Loaded
Recv: adc_init
Recv: PAT9125_RES_X=0
Recv: PAT9125_RES_Y=240
Recv: PAT9125_init:1
Recv: FSensor DISABLED
Recv:
Recv: echo:SD init fail
Recv: echo:SD init fail
Recv: MMU not responding - DISABLED
There was a timeout while trying to connect to the printer
Changing monitoring state from "Connecting" to "Offline"

Posted : 30/10/2018 9:46 pm
RDominelli
(@rdominelli)
Active Member
Re: Firmware 3.4.1-FINAL for Original Prusa i3 MK2.5

Having the exact same issue
Tried tweaking the timeouts int Octprint to see if that would fix it but no luck. Also thought it was odd that there was an MMU message

Send: N0 M110 N0*125
Recv: echo: 3.4.1-1356
Recv: echo: Last Updated: Oct 4 2018 17:44:04 | Author: (none, default config)
Recv: Compiled: Oct 4 2018
Recv: echo: Free Memory: 2045 PlannerBufferBytes: 1392
Recv: echo:Stored settings retrieved
Recv: adc_init
Recv: PAT9125_RES_X=0
Recv: PAT9125_RES_Y=240
Recv: PAT9125_init:1
Recv: FSensor DISABLED
Recv:
Recv: echo:SD init fail
Recv: echo:SD init fail
Recv: MMU not responding - DISABLED
There was a timeout while trying to connect to the printer
Changing monitoring state from "Connecting" to "Offline"
Connection closed, closing down monitor

Posted : 01/11/2018 1:05 pm
Nobody
(@nobody)
New Member
Re: Firmware 3.4.1-FINAL for Original Prusa i3 MK2.5

Had the same problem. 😮

Now the version 3.42 of Github flashed, now it goes again. 😛 🙄

Posted : 03/11/2018 4:35 am
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