Duet2 connection interrupted: Let's get to the bottom of this

[Nxt-1]

@gloomyandy @Falkia I have both the main AP and the repeater broadcasting their own ssid at the moment, so I can force connection to the AP by removing the main ssid from the duet's networks.

Update, I just did that, so now only the ssid broadcast by the repeater is known to the duet and the issue persists.

[gloomyandy]

@nxt-1 Oh well, I guess it is good to eliminate things. I'm pretty sure that the guy that had the problem was using a google nest mesh system, which I think uses the same SSID for all of the access points.

[dc42]

This may possibly be related to https://forum.duet3d.com/topic/23701/mini-5-wifi-connection-unstable/34?_=1625331363732 which is being investigated.

[Nxt-1]

@dc42 said in Duet2 connection interrupted: Let's get to the bottom of this:

This may possibly be related to https://forum.duet3d.com/topic/23701/mini-5-wifi-connection-unstable/34?_=1625331363732 which is being investigated.

You might very well be right, at least the symptoms described seems quite similar if not the exact same.

[jens55]

I have the same issue (had it ever since the first Duet). Things will go just fine for the longest time then all of a sudden I get repeated interruptions. Then just like it started, the issue magically goes away.
I was unable to make heads or tails out of it and eventually gave up. Now, if things act up, I go do something else

It is not related to signal strength.
Latest episode happened yesterday. For about 5 minutes I was unable to reach the printer consistently and then all was fine again. I did not reboot anything tp make things work.

[dc42]

@jens55 said in Duet2 connection interrupted: Let's get to the bottom of this:

Latest episode happened yesterday. For about 5 minutes I was unable to reach the printer consistently and then all was fine again. I did not reboot anything tp make things work.

Was microwave oven turned on for those 5 minutes by any chance?

[Phaedrux]

@nxt-1 Would you be able to collect a wireshark trace?

[Nxt-1]

@phaedrux said in Duet2 connection interrupted: Let's get to the bottom of this:

@nxt-1 Would you be able to collect a wireshark trace?

Sure, whenever another episode happens I will capture it. I assume a trace with a filter for just the Duet IP will suffice?

[chrishamm]

@nxt-1 Yes, the part where the DWC loses connection to the Duet should suffice. In other interest there is now v1.26 with extra debugging available. If you want to give it a try and a connection drop occurs, please send M111 P14 S1 followed by M122 and share the full output here. It may help us further to isolate the underlying problem.

[jens55]

@dc42 said in Duet2 connection interrupted: Let's get to the bottom of this:

@jens55 said in Duet2 connection interrupted: Let's get to the bottom of this:

Latest episode happened yesterday. For about 5 minutes I was unable to reach the printer consistently and then all was fine again. I did not reboot anything tp make things work.

Was microwave oven turned on for those 5 minutes by any chance?

No

[Nxt-1]

@phaedrux said in Duet2 connection interrupted: Let's get to the bottom of this:

@nxt-1 Would you be able to collect a wireshark trace?

1.pcapng.c
2.pcapng.c
3FullDataset.pcapng.c
Here you go, the .c extension needs to be removed abviously, the forum doesn't allow from .pcapng files The first two datasets were started when I notices warning popping up in dwc, so they are probabily missing the first pieces of vital information. The 3rd set contains everything from start to finish.

Note: all these traces were without the new v1.26 debug firmware as sugested by @chrishamm. I will install that now and report back.

[Nxt-1]

@chrishamm said in Duet2 connection interrupted: Let's get to the bottom of this:

@nxt-1 Yes, the part where the DWC loses connection to the Duet should suffice. In other interest there is now v1.26 with extra debugging available. If you want to give it a try and a connection drop occurs, please send M111 P14 S1 followed by M122 and share the full output here. It may help us further to isolate the underlying problem.

As requested: as soon as a connection interupted warning poped, I did a M11 P14 S1 followed by M122.

7/30/2021, 11:16:00 AM	M122
=== Diagnostics ===
RepRapFirmware for Duet 2 WiFi/Ethernet version 3.3 (2021-06-15 21:44:54) running on Duet WiFi 1.0 or 1.01
Board ID: 08D6M-91AST-L23S4-7JTD0-3S86K-1NX1K
Used output buffers: 3 of 24 (24 max)
=== RTOS ===
Static ram: 23876
Dynamic ram: 74668 of which 24 recycled
Never used RAM 15848, free system stack 94 words
Tasks: NETWORK(ready,91.8%,143) HEAT(delaying,0.9%,330) Move(notifyWait,2.4%,301) MAIN(running,4.5%,128) IDLE(ready,0.4%,29), total 100.0%
Owned mutexes: WiFi(NETWORK)
=== Platform ===
Last reset 116:49:31 ago, cause: power up
Last software reset at 2021-07-25 14:11, reason: User, GCodes spinning, available RAM 15848, slot 2
Software reset code 0x0003 HFSR 0x00000000 CFSR 0x00000000 ICSR 0x0041f000 BFAR 0xe000ed38 SP 0x00000000 Task MAIN Freestk 0 n/a
Error status: 0x14
Aux0 errors 0,0,0
Step timer max interval 0
MCU temperature: min 30.9, current 36.0, max 36.9
Supply voltage: min 24.1, current 24.2, max 24.5, under voltage events: 0, over voltage events: 0, power good: yes
Heap OK, handles allocated/used 0/0, heap memory allocated/used/recyclable 0/0/0, gc cycles 0
Driver 0: position 91505, standstill, SG min/max not available
Driver 1: position 73958, standstill, SG min/max not available
Driver 2: position 73795, standstill, SG min/max not available
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: 2021-07-30 11:15:41
Cache data hit count 4294967295
Slowest loop: 88.64ms; fastest: 0.15ms
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 1.5ms, write time 87.0ms, max retries 0
=== Move ===
DMs created 83, maxWait 0ms, bed compensation in use: mesh, comp offset 0.000
=== MainDDARing ===
Scheduled moves 68595, completed moves 68595, 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: 1927.81ms; fastest: 0.00ms
Responder states: HTTP(0) HTTP(0) HTTP(0) HTTP(0) FTP(0) Telnet(0), 0 sessions
HTTP sessions: 1 of 8
- WiFi -
Network state is active
WiFi module is connected to access point 
Failed messages: pending 0, notready 0, noresp 0
WiFi firmware version 1.26-D
WiFi MAC address a0:20:a6:16:ec:ed
WiFi Vcc 3.36, reset reason Turned on by main processor
WiFi flash size 4194304, free heap 24360
WiFi IP address 192.168.178.30
WiFi signal strength -50dBm, mode 802.11n, reconnections 0, sleep mode modem
Clock register 00002002
Socket states: 0 0 0 0 0 0 0 0

7/30/2021, 11:15:47 AM	M111 P14 S1
Debugging enabled for modules: WiFi(14 - 0xffffffff)
Debugging disabled for modules: Platform(0) Network(1) Webserver(2) GCodes(3) Move(4) Heat(5) DDA(6) Roland(7) Scanner(8) PrintMonitor(9) Storage(10) PortControl(11) DuetExpansion(12) FilamentSensors(13) Display(15) LinuxInterface(16) CAN(17)

7/30/2021, 11:15:36 AM	Connection established
7/30/2021, 11:15:31 AM	Connection interrupted, attempting to reconnect...
HTTP request timed out

EDIT: After a few more disconnects, another M122 incase it is useful

M122
=== Diagnostics ===
RepRapFirmware for Duet 2 WiFi/Ethernet version 3.3 (2021-06-15 21:44:54) running on Duet WiFi 1.0 or 1.01
Board ID: 08D6M-91AST-L23S4-7JTD0-3S86K-1NX1K
Used output buffers: 3 of 24 (24 max)
=== RTOS ===
Static ram: 23876
Dynamic ram: 74668 of which 24 recycled
Never used RAM 15848, free system stack 94 words
Tasks: NETWORK(ready,13.8%,143) HEAT(delaying,0.0%,330) Move(notifyWait,0.1%,301) MAIN(running,86.1%,128) IDLE(ready,0.0%,29), total 100.0%
Owned mutexes: WiFi(NETWORK)
=== Platform ===
Last reset 117:01:45 ago, cause: power up
Last software reset at 2021-07-25 14:11, reason: User, GCodes spinning, available RAM 15848, slot 2
Software reset code 0x0003 HFSR 0x00000000 CFSR 0x00000000 ICSR 0x0041f000 BFAR 0xe000ed38 SP 0x00000000 Task MAIN Freestk 0 n/a
Error status: 0x14
Aux0 errors 0,0,0
Step timer max interval 0
MCU temperature: min 35.6, current 36.3, max 37.0
Supply voltage: min 24.1, current 24.2, max 24.5, under voltage events: 0, over voltage events: 0, power good: yes
Heap OK, handles allocated/used 0/0, heap memory allocated/used/recyclable 0/0/0, gc cycles 0
Driver 0: position 91505, standstill, SG min/max not available
Driver 1: position 73958, standstill, SG min/max not available
Driver 2: position 73795, standstill, SG min/max not available
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: 2021-07-30 11:27:55
Cache data hit count 4294967295
Slowest loop: 5.81ms; fastest: 0.17ms
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 1.3ms, write time 0.0ms, max retries 0
=== Move ===
DMs created 83, maxWait 0ms, bed compensation in use: mesh, comp offset 0.000
=== MainDDARing ===
Scheduled moves 68595, completed moves 68595, 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: 203.84ms; fastest: 0.08ms
Responder states: HTTP(0) HTTP(0) HTTP(0) HTTP(0) FTP(0) Telnet(0), 0 sessions
HTTP sessions: 1 of 8
- WiFi -
Network state is active
WiFi module is connected to access point 
Failed messages: pending 0, notready 0, noresp 1
WiFi firmware version 1.26-D
WiFi MAC address a0:20:a6:16:ec:ed
WiFi Vcc 3.36, reset reason Turned on by main processor
WiFi flash size 4194304, free heap 24360
WiFi IP address 192.168.178.30
WiFi signal strength -51dBm, mode 802.11n, reconnections 0, sleep mode modem
Clock register 00002002
Socket states: 0 0 0 0 0 0 0 0

[chrishamm]

@nxt-1 I'm sorry I forgot to mention it but I'll need the M122 output from a USB console, else the useful stats from the debug build aren't printed. I'll have a look at your Wireshark dumps nevertheless.

PS: Your Wireshark dumps show that the WiFi module sometimes doesn't seem to receive incoming packets. I suspect we could confirm this by looking at the LWIP stats reported over USB.

[Nxt-1]

@chrishamm

Here you go, two more M122 dumps, taken from my laptop connected via USB.

M122<CR>
=== Diagnostics ===
RepRapFirmware for Duet 2 WiFi/Ethernet version 3.3 (2021-06-15 21:44:54) running on Duet WiFi 1.0 or 1.01
Board ID: 08D6M-91AST-L23S4-7JTD0-3S86K-1NX1K
Used output buffers: 1 of 24 (20 max)
=== RTOS ===
Static ram: 23876
Dynamic ram: 74668 of which 24 recycled
Never used RAM 15848, free system stack 134 words
Tasks: NETWORK(ready,78.8%,244) HEAT(delaying,0.6%,330) Move(notifyWait,1.5%,303) MAIN(running,18.9%,443) IDLE(ready,0.2%,29), total 100.0%
Owned mutexes: WiFi(NETWORK) USB(MAIN)
=== Platform ===
Last reset 13:24:33 ago, cause: software
Last software reset at 2021-07-31 22:17, reason: User, GCodes spinning, available RAM 15848, slot 0
Software reset code 0x0003 HFSR 0x00000000 CFSR 0x00000000 ICSR 0x0041f000 BFAR 0xe000ed38 SP 0x00000000 Task MAIN Freestk 0 n/a
Error status: 0x00
Aux0 errors 0,0,0
Step timer max interval 0
MCU temperature: min 29.4, current 29.7, max 42.3
Supply voltage: min 23.8, current 24.2, max 25.0, under voltage events: 0, over voltage events: 0, power good: yes
Heap OK, handles allocated/used 0/0, heap memory allocated/used/recyclable 0/0/0, gc cycles 0
Driver 0: position 195079, standstill, SG min/max 0/447
Driver 1: position 195010, standstill, SG min/max 0/464
Driver 2: position 194953, standstill, SG min/max not available
Driver 3: position 0, standstill, SG min/max 0/479
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: 2021-08-01 11:41:44
Cache data hit count 4294967295
Slowest loop: 6.87ms; fastest: 0.17ms
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 1.3ms, write time 0.0ms, max retries 0
=== Move ===
DMs created 83, maxWait 44916359ms, bed compensation in use: none, comp offset 0.000
=== MainDDARing ===
Scheduled moves 4, completed moves 4, 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
Heater 1 is on, I-accum = 0.0
=== 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 ready with "M122" 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: 17.09ms; fastest: 0.00ms
Responder states: HTTP(0) HTTP(0) HTTP(0) HTTP(0) FTP(0) Telnet(0), 0 sessions
HTTP sessions: 1 of 8
- WiFi -
Network state is active
WiFi module is connected to access point 
Failed messages: pending 0, notready 0, noresp 0
WiFi firmware version 1.26-D
WiFi MAC address a0:20:a6:16:ec:ed
WiFi Vcc 3.36, reset reason Turned on by main processor
WiFi flash size 4194304, free heap 22944
WiFi IP address 192.168.178.30
WiFi signal strength -52dBm, mode 802.11n, reconnections 0, sleep mode modem
Clock register 00002002
Socket states: 0 0 0 0 0 0 0 0
ok
WiFi: Conns: 0:closePending 80, 59705, 192.168.178.27, 1:free, 2:free, 3:free, 4:free, 5:free, 6:free, 7:free
WiFi: IP xmit: 44326 recv: 9906 fw: 0 drop: 848 chkerr: 0 lenerr: 0 memerr: 0 rterr: 0 proterr: 0 opterr: 0 err: 0 cachehit: 0
WiFi: TCP xmit: 62257 recv: 24835 fw: 0 drop: 95 chkerr: 0 lenerr: 0 memerr: 0 rterr: 0 proterr: 95 opterr: 0 err: 0 cachehit: 22789
WiFi: MEM UDP_PCB avail: 6 used: 4 max: 4 err: 0
WiFi: MEM TCP_PCB avail: 8 used: 1 max: 8 err: 0
WiFi: MEM TCP_PCB_LISTEN avail: 4 used: 1 max: 1 err: 0
WiFi: MEM TCP_SEG avail: 16 u<DEL>MEM PBUF_REF/ROM avail: 10 used: 0 max: 0 err: 0
WiFi: MEM PBUF_POOL avail: 4 used: 0 max: 0 err: 0

M122
=== Diagnostics ===
RepRapFirmware for Duet 2 WiFi/Ethernet version 3.3 (2021-06-15 21:44:54) running on Duet WiFi 1.0 or 1.01
Board ID: 08D6M-91AST-L23S4-7JTD0-3S86K-1NX1K
Used output buffers: 1 of 24 (20 max)
=== RTOS ===
Static ram: 23876
Dynamic ram: 74668 of which 24 recycled
Never used RAM 15848, free system stack 134 words
Tasks: NETWORK(ready,14.2%,243) HEAT(delaying,0.0%,330) Move(notifyWait,0.1%,303) MAIN(running,85.6%,423) IDLE(ready,0.0%,29), total 100.0%
Owned mutexes: WiFi(NETWORK) USB(MAIN)
=== Platform ===
Last reset 13:39:20 ago, cause: software
Last software reset at 2021-07-31 22:17, reason: User, GCodes spinning, available RAM 15848, slot 0
Software reset code 0x0003 HFSR 0x00000000 CFSR 0x00000000 ICSR 0x0041f000 BFAR 0xe000ed38 SP 0x00000000 Task MAIN Freestk 0 n/a
Error status: 0x00
Aux0 errors 0,0,0
Step timer max interval 0
MCU temperature: min 29.4, current 30.1, max 30.8
Supply voltage: min 24.1, current 24.2, max 24.5, under voltage events: 0, over voltage events: 0, power good: yes
Heap OK, handles allocated/used 0/0, heap memory allocated/used/recyclable 0/0/0, gc cycles 0
Driver 0: position 195079, standstill, SG min/max not available
Driver 1: position 195010, standstill, SG min/max not available
Driver 2: position 194953, standstill, SG min/max not available
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: 2021-08-01 11:56:31
Cache data hit count 4294967295
Slowest loop: 14.32ms; fastest: 0.17ms
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 1.3ms, write time 0.0ms, max retries 0
=== Move ===
DMs created 83, maxWait 0ms, bed compensation in use: none, comp offset 0.000
=== MainDDARing ===
Scheduled moves 4, completed moves 4, 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
Heater 1 is on, I-accum = 0.0
=== 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 ready with "M122" 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: 200.67ms; fastest: 0.08ms
Responder states: HTTP(0) HTTP(0) HTTP(0) HTTP(0) FTP(0) Telnet(0), 0 sessions
HTTP sessions: 1 of 8
- WiFi -
Network state is active
WiFi module is connected to access point 
Failed messages: pending 0, notready 0, noresp 1
WiFi firmware version 1.26-D
WiFi MAC address a0:20:a6:16:ec:ed
WiFi Vcc 3.36, reset reason Turned on by main processor
WiFi flash size 4194304, free heap 26096
WiFi IP address 192.168.178.30
WiFi signal strength -54dBm, mode 802.11n, reconnections 0, sleep mode modem
Clock register 00002002
Socket states: 0 0 0 0 0 0 0 0
ok
WiFi: Conns: 0:free, 1:free, 2:free, 3:free, 4:free, 5:free, 6:free, 7:free
WiFi: IP xmit: 57117 recv: 25483 fw: 0 drop: 864 chkerr: 0 lenerr: 0 memerr: 0 rterr: 0 proterr: 0 opterr: 0 err: 0 cachehit: 0
WiFi: TCP xmit: 7106 recv: 39465 fw: 0 drop: 95 chkerr: 0 lenerr: 0 memerr: 0 rterr: 0 proterr: 95 opterr: 0 err: 0 cachehit: 36781
WiFi: MEM UDP_PCB avail: 6 used: 4 max: 4 err: 0
WiFi: MEM TCP_PCB avail: 8 used: 4 max: 8 err: 0
WiFi: MEM TCP_PCB_LISTEN avail: 4 used: 1 max: 1 err: 0
WiFi: MEM TCP_SEG avail: 16 used: 0 max: 14 err: 0
WiFi: MEM ARP_QUEU<DEL>MEM PBUF_REF/ROM avail: 10 used: 0 max: 0 err: 0

[ajdtreyd]

@Nxt-1

I wonder if this might be a DHCP issue. Is your Duet configured for DHCP or static IP address? If DHCP, try configuring it with a static IP (that is outside the DHCP lease list range). Aternatively, try changing the lease period expiration on the DHCP server (probably the router) to zero (or whatever = never).

[Nxt-1]

@ajdtreyd Man I would have never guessed to look in that direct, good thinking on your part. Although I must admit I have never known DHCP to cause intermittent issues. And I doubt it is the case here. My Duet is indeed in DHCP mode, with a preferred IP set at the DHCP-server (the router in my case), with a default lease time of 10 days. To give some perspective, the issues I described happend multiple times a day, variying amounts but I'd guestimate around 10-15 times/day.

I will try if setting a proper static ip will make any difference just to be sure.

[Nxt-1]

@ajdtreyd As promissed, I just tried with a static ip. No change sadly. One more thing to cross off the list I guess

[jens55]

Another interesting and possibly related experience:
Most of yesterday, I had substantial problems downloading files from Cura to my Duet2wifi. When you select to print via Cura, it asks you to confirm the file name and then you see a progress window for the download. Most of the time this goes very fast. Well, yesterday the progress would go in little chunks. Maybe 2% at a time, sometimes more, sometimes less, sometimes it would just sit there for a second or ten before moving again.
To me this looks like interference of some kind but short of a spectrum analyser, I have no means of tracing the problem. I am 99.9999% sure this has nothing to do with anything in my household but I have no idea what kind of crap comes in from the outside. I am not sure how the neigborhood would react to me wrapping the house in aluminum foil but I suspect they would not be pleased.

Today it is business as usual with a very fast file transfer.

The funny thing is that the printer is in the basement, thick concrete walls and what not so presumably a substantial amount of reduction in any interfering signals. The network access point is about 30 feet away but I have had it sitting right next to the printer with no difference in the issue.

[Nxt-1]

@jens55 I feel you, I can't really justify one but I'd love to have capable spectrum analyzer as well. My 200MHz scope fft isn't going to cut it when looking for 2,4 GHz noise . Although I must admit that I doubt this an interference issue, seeing how constant it is. My connection issues happen 24/7 for random lengths of time. Also, and I did have them before I moved as well, eliminating some HAM neighbour going wild on the spectrum

@chrishamm or @Phaedrux Did you manage to figure out anything from the wireshark traces / debug dumps?

[Phaedrux]

I'm not sure if @chrishamm has had a chance to view your debug dumps yet.

How handy are you with a soldering iron? Handy enough to replace the wifi module confidently?