Duet Wifi Webserver not responding

  • administrators

    I'm not certain the wifi firmware 1.21RC3 is fully compatible with main firmware 1.20. So please try either upgrading main firmware or downgrading DuetWiFiServer.

  • Had only 50 MB of GCode files on the SD-Card with 10MB beeing the largest file, is this already considered "very large"?
    The card has a read and write rate of around 1MB, may be its limited by the usb sd card adapter. I reformated the SD with 64k blocks but put only a few gcode files back so cannot test if it helps (sorry).

    I probably will buy a new SD card and wonder if its usefull to buy a class10 as these are about the same price as class4, or does the duet limit the speed anyway?

  • administrators

    No, 10Mb isn't very large. I have tested up to 300Mb.

    When I tested class 4 and class 10 cards, I didn't see a consistent difference between them. See http://forums.reprap.org/read.php?416,664836,664836#msg-664836. Those results were obtained in 2016 using a Duet 0.6. The results for a Duet WiFi or Duet Ethernet may be different because they use a larger write buffer.

  • I have what sounds like the same issue, but using a Duet Ethernet. (seemingly) Randomly the web interface is lost, but the machine keeps printing, and PanelDue is still able to control operation.
    Tried using chrome instead of Firefox with the same result. I cannot get a response to ping either though, which sounds different to the wifi issue above, though maybe due to the different hardware?

    I'm almost certain I've seen the same on my Ormerod with original Duet as well.

    I will try to do some diagnostics next time it happens.

    Firmware Name: RepRapFirmware for Duet Ethernet
    Firmware Electronics: Duet Ethernet 1.0
    Firmware Version: 1.20 (2017-12-23)
    Web Interface Version: 1.20

  • administrators

    Next time it happens:

    1. Send M552 and see if it reports that the network is enabled and your Duet Ethernet has an IP address;

    2. Send M552 S-1 then M552 S1 and see if you can then connect DWC again.

  • Will do.

    What I did try earlier was to disconnect the lan cable, and reconnect it. The console on the PanelDue updated, showing 'Network running…' and the same, correct ip address.
    IP address is configured fixed in config.g as

    M540 PBE:EF:DE:AD:FE:EC ; Set MAC address
    M552 P192.168.0.236 S1 ; Enable network and set IP address
    M553 P255.255.255.0 ; Set netmask
    M554 P192.168.0.254 ; Set gateway

    and the two printers have different MAC - I just went back to check I'd done that, but they usually aren't powered up at the same time anyway.

  • OK, just lost the web interface again…

    M552 issued from the PanelDue reports 'Network is enabled, configured IP address:, actual IP address:'
    No response to ping.
    No response to M552 S-1
    No response to M552 S1
    M552 no change in the response. Still no connection to web interface or ping response.

    Hooked up a USB connection, fired up minicom... M122 returns the following

    === Diagnostics ===
    Used output buffers: 2 of 32 (12 max)
    === Platform ===
    RepRapFirmware for Duet Ethernet version 1.20 running on Duet Ethernet 1.0
    Board ID: 08DGM-95BNL-MGPSJ-6J1FA-3S06M-91YVW
    Static ram used: 11992
    Dynamic ram used: 98688
    Recycled dynamic ram: 4008
    Stack ram used: 3576 current, 8400 maximum
    Never used ram: 7984
    Last reset 00:22:46 ago, cause: power up
    Last software reset at 2018-03-03 12:55, reason: User, spinning module GCodes, available RAM 11880 bytes (slot 0)
    Software reset code 0x0003 HFSR 0x00000000, CFSR 0x00000000, ICSR 0x0441f000, 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 45.6, current 45.9, max 46.0
    Supply voltage: min 21.9, current 22.0, max 22.1, under voltage events: 0, over voltage events: 0
    Driver 0: standstill, SG min/max not available
    Driver 1: standstill, SG min/max not available
    Driver 2: standstill, SG min/max not available
    Driver 3: standstill, SG min/max not available
    Driver 4: standstill, SG min/max not available
    Date/time: 2018-03-03 21:54:20
    Cache data hit count 2450058580
    Slowest main loop (seconds): 0.003427; fastest: 0.000050
    === 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 heaters = 0 -1 -1 -1, chamberHeaters = -1 -1
    Heater 0 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 ready with "M122" 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: 5
    HTTP sessions: 1 of 8
    Responder states: HTTP(0) HTTP(0) HTTP(0) HTTP(0) FTP(0) Telnet(0)
    ```Sent M552

    Network is enabled, configured IP address:, actual IP address:



    Network is enabled, configured IP address:, actual IP address:

    (Supply voltage looks odd at 22.0V, but it is deliberate and does not indicate a problem)

  • Maybe you can use M583 (Wait for pin) to wait for the release of the external switch before continuing to the M552 S1. I just ran into this issue as well on my first print with the Duet. It was fine for about the first hour and I was able to tweak the extrusion,etc but I was unable connect for the the last couple hours of the print (the print did complete successfully, though). LED on the Wifi module was still steady illuminated but my router indicated that the connection was not present. Pressing reset after the job completed reestablished the the link.

  • Sorry. That was out of context - I just now noticed there was a second page of discussion. 😕

  • There're multiple different issues being reported on this thread. 😞 The one I'm experiencing is where the web gui goes offline but I can still ping the device.

    Do you still need more logs for that one?

    I'm seeing this on FW 1.21RC3 (2018-02-28 build 4), WiFi server 1.21RC3 (28b1), web interface 1.21-RC4.

    I have a few logs I pulled, which I can supply if you need more info. Of note, though, I'm seeing this on the serial console:

    HTTP req, command words { GET /rr_status HTTP/1.1 }, parameters { type=3 }
    New conn on socket 7 for local port 80
    HTTP connection accepted
    Found responder
    Received 459 bytes
    Sending reply, file = no
    HTTP req, command words { GET /rr_status HTTP/1.1 }, parameters { type=3 }
    WiFi: ../src/Listener.cpp(62): refused conn on port 80 no free conn
    WiFi: ../src/Listener.cpp(62): refused conn on port 80 no free conn
    WiFi: ../src/Listener.cpp(62): refused conn on port 80 no free conn

    An M586 P0 cycle (S0/S1) did not resolve it:

    HTTP is disabled
    WiFi: recv../src/Listener.cpp(118): stopped listening on port 80
    HTTP is enabled on port 80
    WiFi: ../src/Listener.cpp(174): listening on port 80
    WiFi: ../src/Listener.cpp(62): refused conn on port 80 no free conn

    I also have a full network trace. When I refresh the browser, the gist of it is:

    --> TCP SYN
    <-- TCP SYN ACK
    --> TCP ACK
    --> HTTP GET
    <-- TCP ACK RST
    <-- TCP ACK RST

  • administrators

    @daveidmx, thanks for that, the "no free conn" is the source of the problem. Which main and wifi firmware versions are you running? Please try 1.21RC3 + DuetWiFiServer 1.21RC4 if you are not already running those, because they include some relevant fixes.

  • Thanks! I'm running these:

    I'm seeing this on FW 1.21RC3 (2018-02-28 build 4), WiFi server 1.21RC3 (28b1), web interface 1.21-RC4.

    Is that what you were suggesting to use? Or is there an RC4 of DuetWiFiServer I should test also? I'm looking here:

  • administrators

    Please try RC4 of DuetWiFiServer, by following this link https://github.com/dc42/DuetWiFiSocketServer/blob/dev/Release/DuetWiFiServer-1.21RC4.bin and then pressing Download.

  • Got it! I will report back tomorrow.

  • I didn't get as much testing in today as I'd hoped, but I haven't seen any connection resets so far. Yesterday it was as often as 10 minutes, or as rare as 6 hours. I've had about 2 hours of prints so far today, so… looking good so far?

  • Does the DuetEthernet still use this, or is there something else equivalent that we DuetEthernet folk should be trying out?

  • administrators

    Duet Ethernet doesn't use the DuetWiFiServer.bin file. If you are getting disconnections on the Duet Ethernet and they only happen when you are homing the printer or when printing a file, run M122 after you reconnect and check the MaxReps figure in the report. Note: MaxReps gets reset back to zero after you run M122.

  • I think my disconnects have all been during print processes, but I'm not super confident in that statement. I will look into the maxreps thing. While I'm waiting for another disconnect event, can you explain what the maxreps means? And is any non-zero value bad, or…?

  • administrators

    MaxReps figures above about 50 are bad. The value gives an indication of the interrupt load of the step pulse generator. If it gets too high then the http responder gets starved of CPU time.

  • Got it, thanks.

    I just had an ethernet drop out, and when I did an M122 afterwards, I got a maxreps of 4. So I'm guessing that's not my problem…

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