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    CONSTANT AJAX disconnect errors

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    • KeeganBundefined
      KeeganB
      last edited by

      Ill be away from the printer for about a week, but will updated to that new version you shared David as soon as I return.

      Artemis
      Rostock Max v2
      Orion

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      • fmaundefined
        fma
        last edited by

        David, I juste realized that my WiFi signal strength is really low: -68dBm! I think I'm lucky it's working so well, despite such poor signal!

        I think I will order the new ESP module, with antenna.

        Frédéric

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        • callilundefined
          callil
          last edited by

          Updated to alpha1+1 - pretty much the same story for me unfortunately.
          The following log is right after a disconnect when idle. I restarted the wifi module with M552 on device.

          [[language]]
          === Diagnostics ===
          Used output buffers: 3 of 32 (17 max)
          === Platform ===
          RepRapFirmware for Duet WiFi version 1.20beta1 running on Duet WiFi 1.0
          Board ID: 08DAM-9K9K2-NGNSN-6JKD0-3SJ6T-15UBM
          Static ram used: 15128
          Dynamic ram used: 96048
          Recycled dynamic ram: 3512
          Stack ram used: 1352 current, 4880 maximum
          Never used ram: 11504
          Last reset 00:06:35 ago, cause: reset button or watchdog
          Last software reset reason: User, spinning module GCodes, available RAM 11504 bytes (slot 3)
          Software reset code 0x0003, HFSR 0x00000000, CFSR 0x00000000, ICSR 0x00400000, BFAR 0xe000ed38, SP 0xffffffff
          Error status: 0
          Free file entries: 10
          SD card 0 detected, interface speed: 20.0MBytes/sec
          SD card longest block write time: 0.0ms
          MCU temperature: min 41.1, current 41.6, max 42.8
          Supply voltage: min 24.1, current 24.2, max 24.6, under voltage events: 0, over voltage events: 0
          Driver 0: stalled standstill
          Driver 1: stalled standstill
          Driver 2: stalled standstill
          Driver 3: standstill
          Driver 4: standstill
          Date/time: 2017-10-15 15:01:57
          Slowest main loop (seconds): 0.008844; fastest: 0.000033
          === Move ===
          MaxReps: 0, StepErrors: 0, FreeDm: 240, MinFreeDm 240, MaxWait: 0ms, Underruns: 0, 0
          Scheduled moves: 0, completed moves: 0
          Bed compensation in use: none
          Bed probe heights: 0.000 0.000 0.000 0.000 0.000
          === Heat ===
          Bed heater = 0, chamber heater = -1
          Heater 0 is on, I-accum = 0.0
          Heater 1 is on, I-accum = 0.3
          === GCodes ===
          Segments left: 0
          Stack records: 1 allocated, 0 in use
          Movement lock held by null
          http is idle in state(s) 0
          telnet is idle in state(s) 0
          file is idle in state(s) 0
          serial is idle in state(s) 0
          aux is idle in state(s) 0
          daemon is idle in state(s) 0
          queue is idle in state(s) 0
          autopause is idle in state(s) 0
          Code queue is empty.
          Network state is running
          WiFi module is connected to access point 
          WiFi firmware version 1.20alpha1+1
          WiFi MAC address 5c:cf:7f:ef:4c:24
          WiFi Vcc 3.11, reset reason Turned on by main processor
          WiFi flash size 4194304, free heap 35064
          WiFi IP address 192.168.1.107
          WiFi signal strength -58dBm
          Reconnections 0
          HTTP sessions: 1 of 8
          Socket states: 2 0 0 0 0 0 0 0
          Responder states: HTTP(1) HTTP(0) HTTP(0) HTTP(0) FTP(0) Telnet(0)
          
          
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          • JohnOCFIIundefined
            JohnOCFII
            last edited by

            I've been leery of updating beyond 1.18.2 due to the frequent reports of WiFi issues. Today I decided to take the leap. The upgrade to 1.19.2 went well. Checking M122 my RSSI varied between -53 and -58 (the access point is one floor away in a wood framed house). I stayed connected from a web browser (Google Chrome from a Mac) for approximately 4 hours. During the middle of that 4 hour window was a single 90 minute print.

            All seemed good. Not posting to gloat - but just wanted to add some data points. My access point is an Asus router running the third party Asus-Merlin firmware.

            John

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            • Jareryundefined
              Jarery
              last edited by

              @JohnOCFII:

              My access point is an Asus router running the third party Asus-Merlin firmware.

              My setup is similar, albeit with the issues.
              I have an Asus AC3100 as my main router about 3m away, and an AC66U about 12m away as an access point both with same firmware version, both Merlins.

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              • saironundefined
                sairon
                last edited by

                I experienced the same issue on a new Duet Wifi I received this week. I recalled that I had similar problems with some devices in the past with WMM mode enabled on the router. And indeed, disabling it fixed the issue. I have a router running OpenWrt based distribution, which allows to enable/disable WMM on per-SSID basis. I'm not sure about other routers, such as those ASUS devices mentioned here, but I think it should be at least possible to toggle WMM globally to try if it solves the problem.

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                • fmaundefined
                  fma
                  last edited by

                  As I use an OpenWRT-based router, I'll give this a try! Thanks.

                  Frédéric

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                  • JohnOCFIIundefined
                    JohnOCFII
                    last edited by

                    @sairon:

                    I'm not sure about other routers, such as those ASUS devices mentioned here, but I think it should be at least possible to toggle WMM globally to try if it solves the problem.

                    Interesting.

                    One of my routers is an Asus RT-AC68P. The other is an older RT-N66R. The DuetWifi was attached to the RT-N66R. Both are running Asuswrt-Merlin 380.68_4

                    I notice on the Wireless section - Professional tab there is an item labeled: "Enable WMM APSD" The choices are "Enable" and "Disable" I'm not sure if they mean enabled and disabled but both routers are in the default setting, which shows "Enable."

                    Seeing that this setting has something to do with power saving mode and QoS, who knows - this could be related. I do not see a setting specific to just WMM.

                    https://routerguide.net/wmm-apsd-on-or-off/

                    John

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                    • saironundefined
                      sairon
                      last edited by

                      @JohnOCFII:

                      Seeing that this setting has something to do with power saving mode and QoS, who knows - this could be related. I do not see a setting specific to just WMM.

                      Yep, "disabling WMM" practically means "disabling WMM APSD". Even the page you've linked mentions that it can be linked to connection dropouts: "There are reported cases of mobile devices dropping connections when the WMM APSD options are turned on."

                      As I said, it seems that disabling it resolved the issue for me, so it's worth a try if anyone faces the problem. Probably the worst thing that can happen is that they'll have worse battery performance on their mobile devices for the time of the test.

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                      • MiRundefined
                        MiR
                        last edited by

                        This article:

                        http://bbs.espressif.com/viewtopic.php?t=133

                        mentions a parameter for esp8266 to disable powersave on the chip itself, at least when in client-mode.

                        „You can use wifi_set_sleep_type to set sleep type for power saving and set NONE_SLEEP_T to disable power saving.“

                        @David: Could this be worth a try?

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                        • dc42undefined
                          dc42 administrators
                          last edited by

                          I looked at this before and I think it defaults to no power saving, but I'll check.

                          Duet WiFi hardware designer and firmware engineer
                          Please do not ask me for Duet support via PM or email, use the forum
                          http://www.escher3d.com, https://miscsolutions.wordpress.com

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                          • MiRundefined
                            MiR
                            last edited by

                            At least when I checked with sta_info about a week ago the module was reporting powersave capability to the AP

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                            • Jareryundefined
                              Jarery
                              last edited by

                              turned off WMM APSD
                              So far 2 hours into a print. Not a definitive answer yet, but so far id say looks promising…
                              As I wrote this I went back and saw pink screen "ajax error" timeout, but was able to immediately reconnect with connect button.

                              Will continue testing

                              Edit: disconnected 5 min later, now can't reconnect....back to square one..

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                              • fmaundefined
                                fma
                                last edited by

                                I also turned off WMM. So far, no disconnect…

                                Frédéric

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                                • KeeganBundefined
                                  KeeganB
                                  last edited by

                                  Im running a Tenda AC18 and it doesn't look like I have any WMM options, that I can find.

                                  Artemis
                                  Rostock Max v2
                                  Orion

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                                  • Jareryundefined
                                    Jarery
                                    last edited by

                                    I have the WMM turned off, and I continue to have the issues.
                                    It does sound like the right path of investigation though.

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                                    • fmaundefined
                                      fma
                                      last edited by

                                      In fact, me too 😞

                                      Frédéric

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                                      • KeeganBundefined
                                        KeeganB
                                        last edited by

                                        Oddly, my Duet no longer shows up under my list of connected clients in my router admin control.

                                        Ideas?

                                        Artemis
                                        Rostock Max v2
                                        Orion

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                                        • T3P3Tonyundefined
                                          T3P3Tony administrators
                                          last edited by

                                          did you recently update your router firmware?

                                          www.duet3d.com

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                                          • KeeganBundefined
                                            KeeganB
                                            last edited by

                                            @T3P3Tony:

                                            did you recently update your router firmware?

                                            No.

                                            But I did just updated to the Wifi Server 1.20alpha1+1 and it is showing in my list of clients again.

                                            odd.

                                            Artemis
                                            Rostock Max v2
                                            Orion

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