Not able to connect to Pi3B+ anymore
Initially I set up the Mk3S and Pi3 B+ connected via USB and it was working fine. Powered everything down. When I powered everything up later on, I can no longer connect to the printer, I get error "'Timeout'' @ comm.py:_openSerial:2611 (hook default)".
Both Port and Baud Rate at set to Auto. I can connect to the Pi 3B+ via web, my Logitech camera works fine via Octoprint, but the printer will no longer connect. I have tried multiple USB cables (both with ferrite cores and without) with no success. I have also manually set the Port and Baud rate without success.
Suggestions?
RE: Not able to connect to Pi3B+ anymore
There is a setting in Prusa i3 MK3 for "RPI Port".
Any chance that accidentally got turned ON?
It must be OFF for USB to work.
RE: Not able to connect to Pi3B+ anymore
Nope....checked it multiple times, it is OFF.
RE: Not able to connect to Pi3B+ anymore
If you're a bit linux savvy, try logging in on the RPi directly (via ssh) and shortly after plugging the printer in, enter the dmesg command and look for any messages corresponding to the printer. You should see several messages as it is identified and (hopefully) connected to the RPi.
If that fails, you might try connecting your desktop or laptop directly to the printer and test with Pronterface.
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
RE: Not able to connect to Pi3B+ anymore
I finally figured it out. In case anyone was wondering, I had the "Serial Port" set wrong. I had originally set both "Serial Port" and "Baudrate" to "Auto". I then changed "Baudrate" to "115200" and let "Serial Port" to "Auto", that failed. I changed the "Serial Port" to "USB0" and that also failed. After reading a bazillion online posts, changing various options under "OctoPrint Settings", nothing seemed to work. Out of desperation, I changed the "Serial Port" to "ACM0" and wahla.....success! Even after shutting the printer down for the night, got up this morning and it connected immediately. Yay!