Duet Wifi Webserver not responding

Nuvag

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.

madeinta1wan

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

dc42

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 ?

EasyTarget

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.

madeinta1wan

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

RasPi as terminal server?

Only 121hrs to go…

Nuvag

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.

dc42

@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.

deadwood83

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.

dc42

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 ?

deadwood83

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.

dc42

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.

Nuvag

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?

dc42

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.

epninety

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

dc42

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.

epninety

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.

epninety

OK, just lost the web interface again…

M552 issued from the PanelDue reports 'Network is enabled, configured IP address: 192.168.0.236, actual IP address: 192.168.0.236'
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)
ok

```Sent M552

Network is enabled, configured IP address: 192.168.0.236, actual IP address: 192.168.0.236
ok

ok

Network is enabled, configured IP address: 192.168.0.236, actual IP address: 192.168.0.236
ok

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

TickTock

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.

TickTock

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

daveidmx

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:

[[language]]
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:

[[language]]
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:

[[language]]
--> TCP SYN
<-- TCP SYN ACK
--> TCP ACK
--> HTTP GET
<-- TCP ACK RST
<-- TCP ACK RST