Duet 085 Serial Port Issues

fm16055

Dear Comunity,
I am trying to revive an old duet 0.85 for a quick project, but I have issues.

After a few days of testing with the duet that was perfectly operational, now when I plug it (with the SD plugged) into my laptop (powered only by the USB), under "ports" in the device manager, I can only see a: USB Serial Device (COM9).

Reading the instruction under "All other Duet boards" @https://duet3d.dozuki.com/Wiki/Installing_and_Updating_Firmware , I can understand that I must have corrupted the firmware. However, all the right lights seem to be on (USB, 3.3V, and 5V).

I then downloaded the file called RepRapFirmware.bin that is available at the repository: https://github.com/Duet3D/RepRapFirmware/releases/tag/2.05.1

(can I please also ask what is the "Symbols-RepRapFirmware-Duet085.zip"? It feels like something I should use, but I can't understand how!)

I then get Bossa Program Port (COM10) in the Device Manager by pressing the erase and the reset button.

With Bossa, I flash the RepRapFirmware.bin downloaded previously, ensuring that the "Erase all", "Lock", and "Boot from Flash" boxes are all checked (selecting the correct serial port perfectly detects the ATSAM3X8 device).

The writing and verification stages give no errors. I then press the reset button as stated in the guideline (I also tried unplugging and reconnecting the USB as well as doing both things).

However, when I finish, I can only see "USB Serial Device (COM9)" again in the Device Manager. like I am stuck in a LOOP!!!

As far as I've understood, at this moment, I should see Duet 3D printer electronics listed in the Device Manager before proceeding with unzipping the DuetWebControl.zip in the a /www folder.

Opening the sd card on my desktop, it feels that as soon as I restore the firmware, the Duet will be operational as before. so I might not need this last part.

Thank you in advance for the hints.
Cheers,
Francesco

dc42

@fm16055 if the Bossa port shows up as COM10 but you get COM9 when you flash the firmware and restart, then the firmware update has been successful.

Duet 085 was not a Duet3D product, so it was not assigned a USB device ID and doesn't show up as Duet electronics.

fm16055

Dear @dc42,
Problem solved!
Thank you for your prompt reply.
Sorry for opening such a trivial thread. From the guide, I understood that Duet3D product, was the right dicitur. My bad.
Can I please ask a little demystification on the usefulness of the Symbol zip folder, please?
Cheers,
Francesco

dc42

@fm16055 the symbol files will help me and other developers diagnose the problem if the firmware crashes and records data that can be retrieved by M122. That's all. You don't need to install them.

fm16055

@dc42, it is everything super clear now. Thank you very much again!