I have been running a 3.0 RC for awhile and it was rock solid. Recently I upgraded to: Board: Duet 2 Ethernet (2Ethernet) Firmware: RepRapFirmware for Duet 2 WiFi/Ethernet 3.1.1 (2020-05-19b2) Duet Web Control 3.1.1 Rebooted. My existing config.g and all settings seemed to work fine and required no changes. I did need to insert the baud rate command at the end of my config for my Paneldue but that was easy enough. Paneldue has been updated to the most recent firmware as well. All seems to work fine. When printing I get these strange messages that only pop up on the PanelDue and can not be found in the console or browser pop-up messages. The commands do not make sense at all. Error Bad Command: I408 S9 R15 Error Bad Command: R11*36 I have searched the g-code and none of the offending errors are present. Moments I had a print just stop. It didn't show failed or paused. Just hung. It has never done that before. It is almost as if something is corrupted? Would redoing the firmware update via drag and drop of the .bin into the DWC do anything at this point? Update: Once my current print is finished I am going to try lowering the baud a bit to see if that fixes the issue. Seems strange to do so as I hadn't had any issues with this prior to the updates.

@fcwilt I did mean unshielded. I think my phone's autocorrect must have completed the sentence wrong. That being said, I went back to verify the connection and realized I was actually using two twisted pairs from stranded cat6 cable. With the serial data signals as a pair. One pin was not completed seated in the connector. I reseated the pin and also dropped the baud rate to the next lower rate. I verified the panel came up but then we got hit by a huge storm and power has been out so unable to retest after the changes. The 4pin cable does not follow a stepper cable (also using twisted pairs) so I feel I can rule that out. Ideally it will turn out to be an intermittent connection from that loose pin.

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Strange behavior after 3.1.1 upgrade

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Firmware installation

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Phaedrux Moderator
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This sounds a bit like this issue as well: https://forum.duet3d.com/topic/18790/panel-due-sd-card-1-problem-rrf3-1-1?_=1600741174633
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