@Phaedrux Hi
IP was correct, cache was cleared and tried different browser - also tried different PC completely - no go. Left everything switched off for a few hours then powered it up and left it alone for 15mins. Bingo - able to connect to it via the web - no idea what the hell that was all about. Powered it off/on a few times and each time all good. 
@Foden Hmm. Duetwifi reports it is connected to Wifi, as does my router, but I cannot connect to it via it's IP address
Going to switch it all off and walk away for a bit as my brain was obviously in DFU mode earlier and may still be stuck there
Appreciate your help guys - as always
@Foden Happy Days!!! Was able to apply the 3.2.2 upgrade and it applied OK. Wifi showed as connected but not able to connect to it just yet. Will reset and retry that shortly
@Foden I'm an idiot - in the process of detailing the above it dawned on me I had NOT pressed Erase 
Doing so allowed me to connect via Bossa to upload Duet2CombinedFirmware.bin
(deleted the large post with photos as it was redundant and in the way - sorry)
@Phaedrux It did say 3.2.2 but now I can't get to it via Bossa at all
Not sure what happened - tried a different card but am now NOT able to connect to the DuetWifi via USB and Bossa. Laptop shows the Duet as Com5, Bossa sees Com5 but says "Cannot connect to device on Com5"
Same error - "ERROR: Operation 3 failed after 5 retries" - Web page shows "Please wait while updates are being installed..." 
Hi Phaedrux
Hope you are safe & well. Have downloaded the file again, 3rd time, and about to retry the update again
Current M122 is
M122
=== Diagnostics ===
RepRapFirmware for Duet 2 WiFi/Ethernet version 3.2.2 running on Duet WiFi 1.02 or later
Board ID: 08DDM-9FAM2-LW4S8-6J9FD-3S86R-9MYVX
Used output buffers: 3 of 24 (24 max)
=== RTOS ===
Static ram: 23460
Dynamic ram: 73376 of which 76 recycled
Never used RAM 15168, free system stack 115 words
Tasks: NETWORK(ready,183) HEAT(blocked,308) MAIN(running,449) IDLE(ready,20)
Owned mutexes: WiFi(NETWORK)
=== Platform ===
Last reset 00:43:42 ago, cause: power up
Last software reset at 2021-01-30 13:14, reason: User, GCodes spinning, available RAM 15168, slot 1
Software reset code 0x0003 HFSR 0x00000000 CFSR 0x00000000 ICSR 0x0041f000 BFAR 0xe000ed38 SP 0x00000000 Task MAIN Freestk 0 n/a
Error status: 0x04
Aux0 errors 0,0,0
MCU temperature: min 25.3, current 30.2, max 31.9
Supply voltage: min 24.4, current 24.6, max 24.8, under voltage events: 0, over voltage events: 0, power good: yes
Driver 0: position 18752, standstill, SG min/max 0/88
Driver 1: position -1152, standstill, SG min/max 0/60
Driver 2: position 2937, standstill, SG min/max 0/473
Driver 3: position 0, standstill, SG min/max not available
Driver 4: position 0, standstill, SG min/max not available
Driver 5: position 0
Driver 6: position 0
Driver 7: position 0
Driver 8: position 0
Driver 9: position 0
Driver 10: position 0
Driver 11: position 0
Date/time: 2021-02-16 14:01:23
Cache data hit count 3203037067
Slowest loop: 42.50ms; fastest: 0.21ms
I2C nak errors 0, send timeouts 0, receive timeouts 0, finishTimeouts 0, resets 0
=== Storage ===
Free file entries: 10
SD card 0 detected, interface speed: 20.0MBytes/sec
SD card longest read time 40.4ms, write time 0.0ms, max retries 0
=== Move ===
DMs created 83, maxWait 80640ms, bed compensation in use: none, comp offset 0.000
=== MainDDARing ===
Scheduled moves 10, completed moves 10, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 0], CDDA state -1
=== AuxDDARing ===
Scheduled moves 0, completed moves 0, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 0], CDDA state -1
=== Heat ===
Bed heaters = 0 -1 -1 -1, chamberHeaters = -1 -1 -1 -1
=== GCodes ===
Segments left: 0
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
USB is idle in state(s) 0
Aux is idle in state(s) 0
Trigger is idle in state(s) 0
Queue is idle in state(s) 0
LCD is idle in state(s) 0
Daemon is idle in state(s) 0
Autopause is idle in state(s) 0
Code queue is empty.
=== Network ===
Slowest loop: 15.54ms; fastest: 0.00ms
Responder states: HTTP(0) HTTP(0) HTTP(0) HTTP(0) FTP(0) Telnet(0), 0 sessions
HTTP sessions: 1 of 8
Have a DuetWifi (v3.1.1)
Downloaded RepRapFirmware 3.2.2 upgrade and installed, as per notes, Duet2and3Firmware-3.2.2.zip through the System page of Duet Web Control. Once uploaded I was asked if I wanted to apply to upgrade and I said Yes. Web page cycled continuously looking like it was upgrading, left it for 2 mins. Checked the Duetpanel display and it said "ERROR: Operation 3 failed after 5 retries" . I clicked the X xlose gadget and the printer said 'Firmware uploaded in the top right corner of the screen. Checked the web interface and it was still cycling as though it was upgrading. Power cycled the printer and it's not very happy. Stuck saying 'Initializing' to right.
So I followed Fallback procedure #3 and uploaded 'Duet2CombinedFirmware.bin' via Basso, once the printer was reset it seemed to be OK. So I retried the upgrade via the web interface and got the same issue.
Not sure what I'm doing wrong
@taglia Yep, left min on all day, but not printing, and I got a dozen drops after it was on for 9 hours total. Pleased I have not gone near the duet with my fat-fingered soldering iron
Good call so far! I've had my printer up and printing for 2 hours - ZERO drops. Hope that's not the kiss of death though....... 
KOD - 3 drops in 4 hours, but only printing for 3.
Definitely waaayyy better than before. Will see how I go and report back
@taglia Thanks for the suggestion, am doing that now. Will try to do some test prints later this weekend and post results
What size SD Card are you using?
@taglia Nothing has changed on my network at all is the only issue I have. I have a Wyze v2 cam on the printer which uses the same SSID and it doesn't drop.
I agree that it normally starts off ok and then degrades - I was thinking that was maybe temperature related? The printer will still carry on printing regardless of whether I can connect to it via WIFI or not.
My I have my AJAX retries set to 4 also
In my ignorance - I'm not sure the Wireshark logs show much useful information. Other than traffic relating to equipment disappearing/disconnecting from the network, which is why our logs look similar. The Duet webserver is basically saying 'Hello...HELLO...H E L L O O O ....etc"
I could be wrong though 
Hi dc42
Yes I changed Wi-Fi channels and installed a Wi-Fi extender/booster next to the Duet. Sadly neither made any difference.
I was getting reset reason unknown on the previous version of DuetWiFiServer 1.21 (I think)
Replacement Wi-Fi module has arrived, will look to get it installed in the next couple of weeks (hopefully without frying the Duet)
Took 2 weeks to arrive from Germany, roughly $6CDN
@bearer Only thing having issues is my Duet, everything else Wi-Fi related is fine. I have a wireless camera on the printer using the same SSID and it's OK. Definitely the Duet, likely the wifi module as Phaedrux suggested.
Nothing changed on the network environment and life was hunky dory until firmware and Duet web interface upgrade. If i get chance over the weekend I will look to go back to an earlier setup
Pretty much, as once the Duet drops off the web interface keeps trying to reconnect
This is typical when the connection drops
when things are OK
