Constant 'connection interrupted'
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From the usb terminal console can you send
M997 S1and report the results?It should show the wifi module flash progress.
When you lose connection, does the wifi module light go out?
Can you also test the Duet in Access point mode for a while to see if the module works without disconnections in that mode? That would isolate the problem with the router side.
https://duet3d.dozuki.com/Wiki/Gcode#Section_M589_Configure_access_point_parameters
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Hi
Just doing a test print on it. After uploading Duet WiFiServer.bin v1.24 (15 mins ago) I have not had a single dropout - which is 100% better already. Likely the kiss of death I know.....
Will feedback on your requests shortly. Pretty much 100% guarantee it's not the router side - IT rather than 3D is my thing and I've double checked that side
Hadn't read the part about putting the Duet into AP mode - what is the benefit/purpose to that feature
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M997 S1 shows that it is erasing the firmware and the counts in 5% increments up to 100% at which point it says Upgrade, or update, complete and the WIFI comes back on
The drop outs have returned sadly
Not sure if blue WIFI goes out or not - will need to sit at it and glare at it for awhile on that one
Update (good timing) - just went to glare at it and it dropped out right away
No - the WiFi light does not go out when it reports
Connection interrupted, attempting to reconnect...
HTTP request timed out -
Setting AP mode 'appears' to work but I don't see the SSID 'DUETTEST'
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The SSID would be duet according to your image.
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Yes, 'DUET' sorry, does not show, which I presume isn't a good sign
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Does the module light up when in ap mode?
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@Phaedrux Yes it does
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And nothing shows up on your phone or laptop?
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Nothing new at all
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Could be a failing module. Do you have the means to replace it?
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Not really, would need hot air soldering tool and at least the WIFI module I guess. Not something I've done before, have soldered quite a lot but don't fancy completely frying the board though. Probably have to live with it until it dies and then figure something out. Do you know off-hand if the WIFI module is still either ESP-12S or ESP-07S (from an old dc42 post)
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OMG - I'm sooooo sorry about the AP test. Seems my brain is stuck in DFU mode as I did NOT send M552 S2 to enable the AP SSID. Oddly enough when I do i can see it. I was able to sign into it briefly too
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Able to sign into in on my laptop, but still get drops
I noticed in the diagnostics that i do NOT see what I should, I see
WiFi Vcc 3.45, reset reason Unknown
rather than
WiFi Vcc 3.42, reset reason Turned on by main processor
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Although there weren't any reported issues with either sd card I reformatted my 32Gb one, 64k clusters and did NOT use the quick option and then copied back the files. Left the Duet off overnight, plugged in the sd card and powered it on and left it alone for an hour - 0 drops - ran a couple of G39's to warm up the MCU and again 0 drops
(forgot to mention Duet is enclosed in a case with a fan for cooling-https://www.thingiverse.com/thing:2812834)Had more drops now, very few when it's completely idle. Just for shiggles I plugged in a WiFi extender right next to the printer. Once firmware has been updated we'll see if that makes any difference
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So it seems like an SD card issue?
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@Phaedrux Sadly no, even when the printer is idle I get drop outs. I have a Wi-Fi extender 12" away from the Duet, and it's connected to it. Still get drop outs. Connection stats for the Duet to the Wi-Fi extender are -21dbm 53Mbps.
So.... looks like your initial prognosis was correct
Wi-Fi module is fubar'd and on it's way out and needs to be replaced 
I will try another, 3rd, SD card to triple check
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Just to clarify because I may have missed it in some edits, but were you able to get access point mode working? And were the drops still happening?
If that was the case, then yes, it's likely the module is failing given that your signal strength is good, no other devices in the area are having issues, and it happens even with the router removed from the equation. We've tried reflashing the wifi server and new SD card.
Replacing the wifi module isn't the most difficult process but it's not for beginners either.
Here's an example of it being done with an external antenna version, but it's basically the same.
https://forum.duet3d.com/topic/2825/converting-the-duet-wifi-to-use-an-external-antenna
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@Foden Same issue with 3 different sd cards, all error checked and formatted FAT32
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@Phaedrux Yes, was able to get the AP mode working and connected to it, same network drop problem. Will take a look at the link - thanks again
I think this is an indication of an issue "WiFi Vcc 3.45, reset reason Unknown" as it doesn't match the expected output
