Unable to upload files larger than approx 1.2MB

[bdelia]

@bdelia I just enabled logging of events via M929 P"eventlog.txt" S1, but the resultant log on shows the following after trying to upload a file that failed and caused the network error.

2025-03-08 09:41:49 [info] Event logging started at level warn
2025-03-08 09:41:49 [info] Running: Duet Ethernet 1.02 or later: 3.5.4 (2024-11-24 10:43:42)

[bdelia]

@bdelia I am at my wits end and am thinking I may need to replace the board...but everything seems to work with the exception of uploading files bigger than about 1.4MB. The uploads consistently fail, it is not intermittent.

[Phaedrux]

Did this start happening after updating a firmware or any other change?
Have you tried uploading from a different computer?

[bdelia]

@Phaedrux I just tried uploading from another computer and it worked. I have cleared the cache on the original computer's browser (Chrome), but that did not seem to help. I'll try again and another browser.

[dc42]

@bdelia if this issue continues then it may be helpful if you install Wireshark on your PC and get a trace of a failed attempt to upload a larger file.

[bdelia]

@dc42 , thanks I will give that a try tonight or tomorrow.

[bdelia]

@dc42 , I have been learning wireshark and have done some testing. I am not sure yet how to detect errors associated with network connections, but I know how to isolate the capture between my laptop IP and Duet IP. I now see that any file under about 1.5MB never gets to the POST command. Any file under that threshold uploads fine and I see the POST command.

Any recommendations on what to look for in the capture that might indicate a network issue? I am familiar with HTTP response codes due to my day job, but I am not a network engineer.

[dc42]

@bdelia there should always be a POST command, that's how file uploads are done.

Usually when there are network issues we see network packets with error status. Wireshark usually highlights these in a dark colour.

You probably already know this, but to isolate the traffic to the Duet use filter ip.addr==192.169.1.150 (substitute the actual IP address of the Duet).

[bdelia]

@dc42 I have been able to isolate the isolate the traffic to the Duet. I can see lines of info colored Red and Black amongst the green.

I am just not able to interpret the lines for meaningful errors.

[dc42]

@bdelia if you save the trace as a .pcap file and attach it to a post then we can look at it.