https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/firmware-update-issue/ Prusa3D Forum Discussion Board en-US Thu, 21 May 2026 16:54:55 +0000 wpForo 60 https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/firmware-update-issue/#post-36622 Thu, 06 Jul 2017 11:11:02 +0000 Really sure the printer uses COM6 ?

Go to the Devicemanager and search for COM-ports. Is there Prusa.... listed ?

Thomas]]> Others (Archive) Knickohr https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/firmware-update-issue/#post-36622 https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/firmware-update-issue/#post-36605 Thu, 06 Jul 2017 04:44:39 +0000 I'm having the same issue myself related to the Firmware Updater v2. I've tried uninstalling different versions of the Prusa software, even attempted the original Firmware Updater back in 1.6.1. I keep getting the following error:

avrdude.exe: ser_open(): can't open device "\\.\COM6": Access is denied. avrdude.exe: ser_drain(): read error: The handle is invalid. avrdude.exe: ser_send(): write error: sorry no info avail avrdude.exe: stk500_send(): failed to send command to serial port avrdude.exe: ser_recv(): read error: The handle is invalid. avrdude.exe: stk500v2_ReceiveMessage(): timeout avrdude.exe: ser_send(): write error: sorry no info avail avrdude.exe: stk500_send(): failed to send command to serial port avrdude.exe: ser_recv(): read error: The handle is invalid. avrdude.exe: stk500v2_ReceiveMessage(): timeout avrdude.exe: ser_send(): write error: sorry no info avail avrdude.exe: stk500_send(): failed to send command to serial port avrdude.exe: ser_recv(): read error: The handle is invalid. avrdude.exe: stk500v2_ReceiveMessage(): timeout avrdude.exe: ser_send(): write error: sorry no info avail avrdude.exe: stk500_send(): failed to send command to serial port avrdude.exe: ser_recv(): read error: The handle is invalid. avrdude.exe: stk500v2_ReceiveMessage(): timeout avrdude.exe: ser_send(): write error: sorry no info avail avrdude.exe: stk500_send(): failed to send command to serial port avrdude.exe: ser_recv(): read error: The handle is invalid. avrdude.exe: stk500v2_ReceiveMessage(): timeout avrdude.exe: ser_send(): write error: sorry no info avail avrdude.exe: stk500_send(): failed to send command to serial port avrdude.exe: ser_recv(): read error: The handle is invalid. avrdude.exe: stk500v2_ReceiveMessage(): timeout avrdude.exe: stk500v2_getsync(): timeout communicating with programmer avrdude.exe done. Thank you.

I've verified the COM6 port is the active port in the device manager assigned to the printer. Even Pronterface sees COM6 as the printer but can't connect due to access denied.

Connecting...
Could not connect to COM6 at baudrate 115200:
Serial error: could not open port COM6: Access is denied.

My printer still prints from the SD card but I can't update the firmware to 3.0.11. Any ideas what to try next?]]> Others (Archive) patrick.r3 https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/firmware-update-issue/#post-36605 https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/firmware-update-issue/#post-33157 Tue, 23 May 2017 21:02:43 +0000
I powered down all devices, my windows-PC too, and start from scratch. Update works perfect.

Puhhh !!! Lucky :mrgreen:

Thomas]]> Others (Archive) Knickohr https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/firmware-update-issue/#post-33157 https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/firmware-update-issue/#post-33144 Tue, 23 May 2017 18:36:15 +0000
I will update to newest firmware 3.0.11, but the updater crashes while uploading the firmware :o

Now it's not possible to update the firmware anymore :cry:
avrdude.exe: ser_open(): can't open device "\\.\COM15": Das System kann die angegebene Datei nicht finden. avrdude.exe: ser_drain(): read error: Das Handle ist ung�ltig. avrdude.exe: ser_send(): write error: sorry no info avail avrdude.exe: stk500_send(): failed to send command to serial port avrdude.exe: ser_recv(): read error: Das Handle ist ung�ltig. avrdude.exe: stk500v2_ReceiveMessage(): timeout avrdude.exe: ser_send(): write error: sorry no info avail avrdude.exe: stk500_send(): failed to send command to serial port avrdude.exe: ser_recv(): read error: Das Handle ist ung�ltig. avrdude.exe: stk500v2_ReceiveMessage(): timeout avrdude.exe: ser_send(): write error: sorry no info avail avrdude.exe: stk500_send(): failed to send command to serial port avrdude.exe: ser_recv(): read error: Das Handle ist ung�ltig. avrdude.exe: stk500v2_ReceiveMessage(): timeout avrdude.exe: ser_send(): write error: sorry no info avail avrdude.exe: stk500_send(): failed to send command to serial port avrdude.exe: ser_recv(): read error: Das Handle ist ung�ltig. avrdude.exe: stk500v2_ReceiveMessage(): timeout avrdude.exe: ser_send(): write error: sorry no info avail avrdude.exe: stk500_send(): failed to send command to serial port avrdude.exe: ser_recv(): read error: Das Handle ist ung�ltig. avrdude.exe: stk500v2_ReceiveMessage(): timeout avrdude.exe: ser_send(): write error: sorry no info avail avrdude.exe: stk500_send(): failed to send command to serial port avrdude.exe: ser_recv(): read error: Das Handle ist ung�ltig. avrdude.exe: stk500v2_ReceiveMessage(): timeout avrdude.exe: stk500v2_getsync(): timeout communicating with programmer avrdude.exe done. Thank you. Help !!!

Thomas]]> Others (Archive) Knickohr https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/firmware-update-issue/#post-33144 https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/firmware-update-issue/#post-25901 Tue, 21 Feb 2017 17:25:27 +0000 Let me guess,

You installed the RC, and now when you are attempting to update to the official firmware release your receiving those error messages?

This appears to be a bug in the release candidate....



I found an old forum post where someone was experiencing the same issue with 3.0.9, and they got around it by using Firmware Updater V1......

However, I just contacted support and he had no idea which firmware package contains Firmware Updater V1.....

Does anyone know which firmware package it is in? Or even better a link to just the firmware updater v1? That would be greatly appreciated.

Cheers]]> Others (Archive) tim.t https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/firmware-update-issue/#post-25901 https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/firmware-update-issue/#post-25844 Tue, 21 Feb 2017 00:08:36 +0000 Maybe you are selecting the wrong COM number on the Firmware updater. You can check the right COM port on Windows:

Control Panel -> System -> Hardware Manager -> Ports (COM/LPT)

Choice the "Prusa" port number.]]> Others (Archive) manuel.i https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/firmware-update-issue/#post-25844 https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/firmware-update-issue/#post-25820 Mon, 20 Feb 2017 17:13:16 +0000 Just tried to update to the latest firmware 3.0.10 and I get this error on one computer 1:

avrdude.exe: ser_open(): can't open device "\\.\COM4": Access is denied. avrdude.exe: ser_drain(): read error: The handle is invalid. avrdude.exe: ser_send(): write error: sorry no info avail avrdude.exe: stk500_send(): failed to send command to serial port avrdude.exe: ser_recv(): read error: The handle is invalid. avrdude.exe: stk500v2_ReceiveMessage(): timeout avrdude.exe: ser_send(): write error: sorry no info avail avrdude.exe: stk500_send(): failed to send command to serial port avrdude.exe: ser_recv(): read error: The handle is invalid. avrdude.exe: stk500v2_ReceiveMessage(): timeout avrdude.exe: ser_send(): write error: sorry no info avail avrdude.exe: stk500_send(): failed to send command to serial port avrdude.exe: ser_recv(): read error: The handle is invalid. avrdude.exe: stk500v2_ReceiveMessage(): timeout avrdude.exe: ser_send(): write error: sorry no info avail avrdude.exe: stk500_send(): failed to send command to serial port avrdude.exe: ser_recv(): read error: The handle is invalid. avrdude.exe: stk500v2_ReceiveMessage(): timeout avrdude.exe: ser_send(): write error: sorry no info avail avrdude.exe: stk500_send(): failed to send command to serial port avrdude.exe: ser_recv(): read error: The handle is invalid. avrdude.exe: stk500v2_ReceiveMessage(): timeout avrdude.exe: ser_send(): write error: sorry no info avail avrdude.exe: stk500_send(): failed to send command to serial port avrdude.exe: ser_recv(): read error: The handle is invalid. avrdude.exe: stk500v2_ReceiveMessage(): timeout avrdude.exe: stk500v2_getsync(): timeout communicating with programmer avrdude.exe done. Thank you.

To date I havent had one issue updating from this computer. So I tried a second computer and that computer 2 cant even see COM4. Both printers show up as 'rambo' in device manager. Computer 1 cannot connect with Pronterface while Computer 2 can which is odd seeing as how the firmware updater cant see COM4. Any help is greatly appreciated!]]> Others (Archive) ryan.o https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/firmware-update-issue/#post-25820