no communication via usb  

New Member
Having real issues with connecting my prusa mk2.5s via USB with any software prusa slicer, pronterface etc. I've tried different USB ports ,resetting the printer, uninstalling drivers then reinstalling. Different cables. And nothing else is using this com port.
It shows up in device manager prusai3mk2 com4
Any ideas Guy's

avrdude-slic3r -v -p atmega2560 -c wiring -P COM4 -b 115200 -D -U flash:w:0:C:\Users\thopp\Downloads\prusa3d_fw_MK25S_3_9_0_3421_RAMBo13a_en-es.hex:i

avrdude-slic3r: Version 6.3-20160220-prusa3d, compiled on Mar 21 2020 at 12:45:57
Copyright (c) 2000-2005 Brian Dean,
Copyright (c) 2007-2014 Joerg Wunsch

Using Port : COM4
Using Programmer : wiring
Overriding Baud Rate : 115200
avrdude-slic3r: stk500v2_recv(): timeout
avrdude-slic3r: stk500v2_getsync(): timeout communicating with programmer
avrdude-slic3r: Could not open port: COM4

avrdude-slic3r done. Thank you.

Posted : 31/07/2020 10:22 pm
Reputable Member

Just a stab in the dark but path is longish, try copying to c:\ prusa3d_fw_MK25S_3_9_0_3421_RAMBo13a_en-es.hex with a much shorter name.

Posted : 01/08/2020 3:18 pm

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