CONSTANT AJAX disconnect errors

KeeganB

Is the "Error reason:" given in the Ajax disconnect message Timeout, or something else?

Sorry, I should have included that. Yes, I believe that is the error message. It’s the same message every time.

Jarery

my Ajax error is the same, doesn't say what the cause is whether timeout or other.

Just states "an AJAX error has been reported, so the current session has been terminated. Please check if your printer is still on and try to connect again "

I also disconnect every print but mine do not reconnect.

Edit:
I'm just commissioning a second DuetWifi delta, it has :
Firmware Version: 1.18.1 (2017-04-09)
WiFi Server Version: 1.03 (ch fork)
Web Interface Version: 1.15a

And if I force a disconnect, the warning message has at the bottom "Reason: Timeout". This bottom line is not present at all in the 19.2 firmware disconnects issue. Cannot print yet so unable to tell if the issue is board related or wifi network.

Jarery

Comissioned my 2nd duet wifi printer.
Board came with 1.18.1 firmware. No disconnects when printing. Although only did few prints, 10 min long or so.

Upgraded to 1.19.2, disconnected a coulee min into my first print. Ajax error message again has no line on the bottom stating reason.

So i have 2 new Duet wifi's, both disconnect from my Asus RT-AC3100 wifi network on every print.

The chances its a "bad board" or slim as it happens on both boards.
The chances its my network settings are low as Ive set everything to set channel, etc, and it works on 1.18 without disconnects.

There is something in 1.19 that just makes it appear to timeout

KeeganB

I've never downgraded a Duet. Is it the same process as the update from 1.18 to 1.19.2 was, but in reverse?

dc42

I really wish there was some way I could reproduce the problem you are experiencing. AFAIK you are the only user who finds 1.19.2 less reliable than 1.18.

Downgrading to 1.18 you will need to do a simultaneous install of both DuetWiFiFirmware and DuetWiFiServer. If the board was shipped with 1.19 firmware originally then you will also need to install DuetWiFiFirmware.bin on the WiFi module.

Then you will need to follow the connection instructions for 1.18 and earlier.

lolorc

i also find 1.19.2 less reliable than 1.8 with regard to the wireless/ajax issue. (sorry I'm not really helping with the debugging at the moment, house for sell, can't use my printer as often as I wish)

KeeganB

Thanks David.

My board was shipped with 1.18.

I understand that network issues are near impossible to replicate. I wish there was more detailed log info or something I could get to you. I am able to force a reconnect via USB with M552 S-1/S1

The real frustration comes when doing calibration prints and etc. It disconnects so quickly I can't make any adjustments easily; baby stepping, extrusion, temp etc to do on-the-fly adjustments. That, and every time I want to start a new test print I have to go through the reconnect process every time.

I feel pretty confident my network is not the issue, but I have been toying with the idea of upgrading my router and other network equipment, so maybe I will do that now just in case. I've also considered taking on my my extra routers and setting up a clean dummy network to test.

David, is there any possible advantage in doing a "clean" install of 1.19.2. Meaning, could/should I format the SD card and do a completely clean install of everything, and then just paste in my config values as needed?

Jarery

@KeeganB:

Thanks David.
David, is there any possible advantage in doing a "clean" install of 1.19.2. Meaning, could/should I format the SD card and do a completely clean install of everything, and then just paste in my config values as needed?

My thoughts also.
I'm also not happy with 1.19 in regards to 1.18.
All the additions are awesome, and I always use volumetric extrusion and other features not in 1.18. But if i have no method of connecting to the system the features it has are a moot point.

Dougal1957

I Did have an issue to start with which was almost instant disconnects I fitted an AP Extender and got round it but then when I moved the printer back to it rightful location the issue re-appeared turns out my WiFi AP Credentials for the original AP was corrupt deleting them and re-applying fixed the problem not saying it will fix you issues but may be worth a try?

FWIW I am using a netgear WiFi router (D6400)

KeeganB

Sorry Dougal,

I am not following what you are suggesting? Are you saying the credentials saved to the DUET for connecting to your AP were bad?

Dougal1957

yes indeed

KeeganB

Thanks, I will certainly try that. It won't hurt anything and if it resolves this issue, Ill be ecstatic!

Dougal1957

Use the M588 to remove it from the list first before trying to re-instate it

KeeganB

I didn't have much time last night, but I tested your idea Dougal. Nope

Dougal1957

I didn't think it would TBH your symptoms are different to what mine were but it was worth a try.

KeeganB

Yeah, I wasn't holding much hope, but it was easy enough to give it a shot! Thanks

TimVukman

Hi
I am jumping in here too as I had written my own post on this issue between last night and today. I will collect some data based on the gcodes posted here that will provide the data. I have not been able to connect today because I upgraded to 1.20.7 and something must have gone wrong because now I can't get the Wifi to initialize.

I can say that I never had the connection to the printer drop when I was running 1.18.2. That says the connection from the printer to the network and from the DWC to the printer both had enough signal strength. I will get the numbers if I can.

TimVukman

Hi
I am going to try to downgrade to 1.18.2 since that is when everything was working properly. I currently can't initialize the Wifi module. Any way to test if it is ok?

dc42

@TimVukman:

Hi
I am jumping in here too as I had written my own post on this issue between last night and today. I will collect some data based on the gcodes posted here that will provide the data. I have not been able to connect today because I upgraded to 1.20.7 and something must have gone wrong because now I can't get the Wifi to initialize.

Did you follow the upgrade instructions at https://duet3d.com/wiki/Upgrading_to_DuetWiFiFirmware_1.19 ? In particular, the but about using M587 to enter your WIFI access point ssid and password.

KeeganB

Send M552 S-1

wait for it to complete

Send M552 S1

Try that?