Duet Wifi Webserver not responding


  • administrators

    Thanks, I suspected that these problems might be caused by a lack of sockets. Which version of DuetWiFiServer are you using?



  • Firmware Name:
    RepRapFirmware for Duet WiFi
    Firmware Electronics:
    Duet WiFi 1.0
    Firmware Version:
    1.20 (2017-12-23)
    WiFi Server Version:
    1.21RC1
    Web Interface Version:
    1.20



  • Hi!

    Is it possible to make a program reset of the Wi-Fi module on an external button? For example, execute a script:

    M552 S-1;

    M552 S1;

    ?


  • administrators

    Yes, if you set up a trigger using M581.


  • administrators

    if you do that I think you will need a pause in between the M552 S-1 and M552 S1 commands (I tried to make a macro for this but the S1 was executed too soon after the disable (while the wifi was still changing state) so it did not work.



  • And then what to do?
    Now I connect a USB cable during printing…...brrrrrr))))


  • administrators

    You can insert a pause between the two M552 commands using G4.



  • G4 is bad. Stops printing ….
    Is there a NOP command?


  • administrators

    Good point, if a print is running then G4 will wait for everything to stop. Try this:

    M552 S0 ; disconnect and shutdown wifi services
    M587 ; list access points, with luck this will wait for the shutdown to complete
    M552 S-1
    M552 S1



  • Another data point:

    I lost connection to a DuetWifi during a long print. About six hours in. M582 (via PanelDue) stop/start did not fix. M552 stop/start and connectivity was fine.

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

    Wireless router is a Google WiFi mesh. It is about 15 feet from the printer. It is also true that my Desktop PC is cabled to that same Google node that serves the printer, and the wireless mesh from that node is the only connectivity available to my PC. Meaning that I'd know it instantly if the router mesh node itself dropped.

    As mentioned, just another data point. No explicit reply needed. 🙂



  • As im a software developer myself i know such bugs can be hard to track down.
    Some minor information which may or may not help:

    • wifi may fail even when the printer is not printing (turn printer on, connect webinterface, wait some time, connection lost)
    • wifi may fail within a few seconds after restart. Looks realy random, sometimes hours, and today it failed after <10 seconds

    Its a really annoying problem, probably will finally add my PanelDue which i bought with the printer but never bothered to mount it as the wifi interface did not leave anything to be desired.



  • I too have lost connection. I've got long prints running (4-5 days) and am currently 'printing blind'

    Is connecting through a USB a bad idea while a print is running? Is it possible to reset the wifi connection from the duet board to the router while a print is running?

    Thanks,

    Nate


  • administrators

    Connecting USB while the print is running is OK if you are careful, see https://duet3d.dozuki.com/Wiki/USB_ground_loops. Yes you can reset the network interface during a print.

    Have you checked the points at https://duet3d.dozuki.com/Wiki/WiFi_disconnections_and_AJAX_timeout_errors ?



  • You should be fine with a laptop and a USB cable; You'd almost certainly be OK even if you put it on charge (laptops typically stay isolated behind their powerbrick).
    Once connected You can send [c]M552 S0[/c] then [c]M552 S1[/c] to turn off/on the wifi and it /should/ reconnect to the AP, Use [c]M122[/c] to see how that works out.
    I have a RasPI with a USB link to my Duet, and have had to do this several times when the Webcontrol stopped responding during a print, and it was successful each time.



  • That's great, thanks dc42 and EasyTarget . All sorted.

    RasPi as terminal server?

    Only 121hrs to go…



  • Is there an fix in the works?
    I'm starting to consider downgrading as in earlier versions the wifi was unstable too, but a simple refresh of the webpage reconnected the webinterface compared to restarting the wifi module via USB now.

    Yesterday i noticed i can no longer view my Gcode Files in the webinterface as this causes an Request timeout and disconnects the webinterface (but can be reconnected without restarting the wifi)
    In earlier versions this did not happen but the list of files was not always complete.


  • administrators

    @Nuvag:

    Is there an fix in the works?
    Yesterday i noticed i can no longer view my Gcode Files in the webinterface as this causes an Request timeout and disconnects the webinterface (but can be reconnected without restarting the wifi)
    In earlier versions this did not happen but the list of files was not always complete.

    There is a separate thread on this. That problem has been seen recently when you have very large GCode files on the SD card. The workaround is:

    • Format the SD card to use 64K clusters, which is the largest cluster size possible
    • If the SD card is heavily fragmented, defragment it, or get a new card
    • Use a fast SD card. I get excellent results using a Sandisk 16Gb Class 4 card formatted to 64K clusters.


  • Another user with frequent timeouts. Firmware 1.2.0 WebServer 1.2.1RC4 and WebServer 1.2.0
    WAP: Avaya WAP9122
    Router: Mikrotik CCR1009
    Switch: Avaya VSP4850GTX+

    No real way to connect the PC to the device for debugging sadly. Not without a 150ft USB.

    7:36:58 PM
    Disconnected.
    7:33:07 PM
    Connection established!
    7:28:48 PM
    Disconnected.
    7:23:46 PM
    Connection established!
    7:21:48 PM
    Disconnected.
    7:19:39 PM
    Connection established!
    7:19:39 PM
    Page Load complete!

    Other devices (ecobee, phones, etc) are rock solid for months on end.

    ETA: M122 Output
    WiFi module is connected to access point
    Failed messages: pending 0, notready 0, noresp 0
    WiFi firmware version 1.21RC3(28b1)
    WiFi MAC address 2c:3a:e8:0a:fe:52
    WiFi Vcc 3.39, reset reason Turned on by main processor
    WiFi flash size 4194304, free heap 13000
    WiFi IP address 10.10.30.86
    WiFi signal strength -46dBm, reconnections 0, sleep mode modem
    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)

    DIsconnections are equally bad when printing and when idle. The disconnects above are when idle.


  • administrators

    Then WiFi signal strength looks ok, but have you worked through the rest of https://duet3d.dozuki.com/Wiki/WiFi_disconnections_and_AJAX_timeout_errors ?



  • Yes sir, Ajax set to 5 in Settings / General. No microwaves running, no cordless phones.
    Every Sunday the WAP does a channel congestion scan and auto-selects the least-congested channels.
    Currently one 3x3 is on channel 6 for gn and the other 3x3 radio is on channel 132 for anac.

    No logs of disconnects from the router side unless I reset the duet.

    Just to be thorough I turned off mobile data on my phone to check (4g LTE in the US can interfere with cable modem bonding so why not?) and no difference.

    Edit: first channel has B mode rejection. Changed bgn to gn.


Log in to reply