I did some searching and the codes people say to use just don't seem to be working. Take a look at the Txt file to see what I threw at it and what came back.
Wifi Dead.txt
No clue what the module suddenly stopped working.

I have updated the firmware in the release order to get it up to version: 3.01-beta2 (2020-01-23b1)
The issue persist

@bearer I can set a IP reservation but it doesn't do anything

@dc42
I am running 2.04RC4 (2019-10-19b1)
Running command M122 gives the following

=== Diagnostics ===
RepRapFirmware for Duet 2 WiFi/Ethernet version 2.04RC4 running on Duet WiFi 1.02 or later
Board ID: 08DGM-9T6BU-FG3SN-6JKD8-3SN6R-9VWMG
Used output buffers: 3 of 24 (10 max)
=== RTOS ===
Static ram: 25700
Dynamic ram: 92816 of which 0 recycled
Exception stack ram used: 268
Never used ram: 12288
Tasks: NETWORK(ready,764) HEAT(blocked,1176) MAIN(running,3824) IDLE(ready,160)
Owned mutexes:
=== Platform ===
Last reset 00:08:59 ago, cause: software
Last software reset time unknown, reason: User, spinning module GCodes, available RAM 12332 bytes (slot 0)
Software reset code 0x0003 HFSR 0x00000000 CFSR 0x00000000 ICSR 0x0441f000 BFAR 0xe000ed38 SP 0xffffffff Task 0x4e49414d
Error status: 0
Free file entries: 10
SD card 0 detected, interface speed: 20.0MBytes/sec
SD card longest block write time: 0.0ms, max retries 0
MCU temperature: min 28.1, current 28.7, max 29.0
Supply voltage: min 25.2, current 25.3, max 25.4, under voltage events: 0, over voltage events: 0, power good: yes
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: 2020-01-26 14:37:36
Cache data hit count 2090006692
Slowest loop: 2.56ms; fastest: 0.06ms
I2C nak errors 0, send timeouts 0, receive timeouts 0, finishTimeouts 0, resets 0
=== Move ===
Hiccups: 0, FreeDm: 160, MinFreeDm: 160, MaxWait: 0ms
Bed compensation in use: none, comp offset 0.000
=== DDARing ===
Scheduled moves: 0, completed moves: 0, StepErrors: 0, LaErrors: 0, Underruns: 0, 0
=== Heat ===
Bed heaters = 0 -1 -1 -1, chamberHeaters = -1 -1
Heater 1 is on, I-accum = 0.0
=== GCodes ===
Segments left: 0
Stack records: 2 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 idle 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 ===
Slowest loop: 35.41ms; fastest: 0.00ms
Responder states: HTTP(0) HTTP(0) HTTP(0) HTTP(0) FTP(0) Telnet(0) Telnet(0)
HTTP sessions: 1 of 8

• WiFi -
  Network state is running
  WiFi module is connected to access point
  Failed messages: pending 0, notready 0, noresp 0
  WiFi firmware version 1.21
  WiFi MAC address 84:f3:eb:82:e2:4a
  WiFi Vcc 3.42, reset reason Turned on by main processor
  WiFi flash size 4194304, free heap 15672
  WiFi IP address 192.168.0.104
  WiFi signal strength -57dBm, reconnections 0, sleep mode modem
  Socket states: 0 0 0 0 0 0 0 0

I just installed a Nest Wifi and it sees my MAC address the same as my old router which is 84:f3:eb:82:e2:4a. However when I run the command m540 I get the result of a5:a5:a5:a5:a5:a5.
In addition, when I go into the Google Wifi app, it says IP addess unavailable but can still do a network test with it, I'm assuming via its MAC address. When I go to the IP address I have been using, I can access the Duet from a web browser. However, since the router isn't showing the IP address, I can't do port forwarding. This is something I need so that I can pause or stop a print remotely if I see an issue while I am away from home.
My old router was having a similar port forwarding issue and I thought it was the router. Now I think it is the Duet board.
Please help.

I understand that they are for filament monitoring, but why is that option not there in the online configuration tool? Or is it there and I am missing it?

I am using a Duet2Wifi and in the online configuration tool, there seems to be an option to control all of the main inputs/outputs except for the E0 and E1 stops.
It would be nice to have these stops added to the motors tab under extruders or on the endstop page. I am kind of surprised it isn't already there.

I will look around for a Smmothieware/GRBL plugin.

I'm confused on what I would change in the M452 command. I have set the P, R and F parameters and I don't see anything else besides inverting the signal that you can do with the command. From other places on the forum, it looks like people have had success using the M452 with M3 commands when using a fan pin to control. However, I need to use a 5V TTL signal. Is there something inherent to how the HEATER3 pin is controlled? Is there another pin I might try instead?

The plugin I have for inkscape generates code with the M3 commands. Could you recommend a plugin that generates using G1 S parameters?
If I don't use M452, how would I set the E1 heater and Heater 3 to laser mode in order for the M3 commands to work correctly?

Here is a segment of the gcode file I am using. Is there something I am missing?
M05 S0
G90
G21
G1 F3000
G1 X78.027 Y53.1606
G4 P0
M03 S255
G4 P0
G1 F750.000000
G2 X67.4647 Y58.2199 I3.2607 J20.3625
G2 X61.308 Y68.2625 I13.9842 J15.4816
G2 X60.6505 Y73.2702 I18.3579 J4.9575
G2 X61.3345 Y78.3007 I19.2122 J-0.0508
G2 X63.9352 Y84.1174 I20.1897 J-5.5369
G2 X68.1532 Y88.8641 I17.4699 J-11.2768
G2 X74.512 Y92.7553 I16.8015 J-20.3154
G2 X77.7869 Y93.0201 I2.0283 J-4.7017
G3 X78.3207 Y92.9989 I0.3174 J1.2641
G1 X78.4301 Y93.1283
G2 X79.0747 Y93.7511 I0.6232 J0.
G2 X85.4415 Y92.8863 I-1.1045 J-32.0006
G2 X88.8112 Y91.7702 I-4.9161 J-20.4871
G2 X91.8733 Y90.1351 I-7.9239 J-18.525
G2 X99.9914 Y79.6837 I-11.0149 J-16.9343
G2 X99.9025 Y66.4387 I-19.1661 J-6.4941
G2 X94.4483 Y58.2217 I-19.0985 J6.7584
G2 X85.8249 Y53.6123 I-13.412 J14.7204
G2 X81.6389 Y52.9782 I-5.5116 J22.2482
G2 X78.027 Y53.1606 I-0.9673 J16.6973
G1 X78.027 Y53.1606
G4 P0
M05 S0
G1 F3000
G1 X77.1071 Y56.4577
G4 P0
M03 S255
G4 P0
G1 F750.000000
G1 X77.0617 Y56.5215 F750.000000
G3 X76.4537 Y56.684 I-1.4259 J-4.1163
G3 X75.9837 Y56.6826 I-0.2312 J-1.2096
G1 X75.9401 Y56.5826
G3 X76.7081 Y56.0991 I0.8778 J0.5425
G3 X77.1071 Y56.4577 I0.0384 J0.3586
G1 X77.1071 Y56.4577
G4 P0
M05 S0