Suddenly my wifi network is getting really slow

  • I have a Duet2 Wifi board running nice and smoothly for a year and have not changed anything but all the sudden, as soon as I turn on the printer, my wifi connection is getting really slow. Sometimes it is hardly possible to browse the internet anymore. It feels as if the Duet is jamming my network by some datastream or very frequent network requests of some kind?? Is there any known issue of some problems with some cache overflow or such ?

    This is my current firmware
    Firmware Name: RepRapFirmware for Duet 2 WiFi/Ethernet
    Firmware Electronics: Duet WiFi 1.0 or 1.01 + DueX5
    Firmware Version: 2.04RC1 (2019-07-14b1)
    WiFi Server Version: 1.23
    Web Interface Version: 1.22.5

  • Oh, I added a humidity sensor recently I forgot to say...but else everything remained the same as before the network problem appeared

  • administrators

    There are no known problems in that area, however I suggest you upgrade to RRF 2.04RC4 and DWC 2.04 (or DWC 1.22.6 if you don't want to use DWC2 yet).

    If the WiFi signal strength is marginal, I guess it's possible that the router can see the Duet but the Duet can't see the router. That could cause the Duet to do a lot of re-transmissions.

  • Hi,

    Do you have any neighbors nearby?

    If you have an Android phone you might want to download one of the free WiFi analyzers. It's possible that the local WiFi environment has changed due to a neighbor changing something.

    There are only 3 non-overlapping 2G channels in the US: 1, 6 & 11.

    Also note that adjacent channel interference is a worse problem than co-channel interference. In practice this means that if everyone around you is already using 1, 6 & 11 don't be tempted to use, say, 7. Pick from the existing channels in use and select the channel with the weakest signals.


  • Thanks Frederick! Funny enough I had just chosen channel 7 😉 Lets see if channel one does the trick with only two others users...

  • Moderator

    @dc42 said in Suddenly my wifi network is getting really slow:

    That could cause the Duet to do a lot of re-transmissions.

    A very slow client on a wireless network can bring the whole network to a crawl. Wireless data transfer is all about air time. If one user is taking up all of the airtime the other users have to wait.

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