Duet wifi connection issues

Camaro1

It seems I can connect to router but the screen is blank. On the url tab it shows Duet wifi but my screen is blank.
here is some info.
m115
FIRMWARE_NAME: RepRapFirmware for Duet 2 WiFi/Ethernet FIRMWARE_VERSION: 2.05.1 ELECTRONICS: Duet WiFi 1.02 or later FIRMWARE_DATE: 2020-02-09b1<LF>ok<LF>
m552
WiFi module is connected to access point Davis, IP address 192.168.1.107<LF>ok<LF>
m122
=== Diagnostics ===<LF>RepRapFirmware for Duet 2 WiFi/Ethernet version 2.05.1 running on Duet WiFi 1.02 or later<LF>Board ID: 08DDM-9FAM2-LW4SD-6JKF2-3SJ6R-KLZRY<LF>Used output buffers: 1 of 24 (1 max)<LF>=== RTOS ===<LF>Static ram: 25712<LF>Dynamic ram: 93096 of which 460 recycled<LF>Exception stack ram used: 260<LF>Never used ram: 11544<LF>Tasks: NETWORK(ready,1448) HEAT(blocked,1232) MAIN(running,3824) IDLE(ready,160)<LF>Owned mutexes:<LF>=== Platform ===<LF>Last reset 00:00:52 ago, cause: power up<LF>Last software reset time unknown, reason: User, spinning module GCodes, available RAM 11340 bytes (slot 0)<LF>Software reset code 0x0003 HFSR 0x00000000 CFSR 0x00000000 ICSR 0x0441f000 BFAR 0xe000ed38 SP 0xffffffff Task 0x4e49414d<LF>Error status: 0<LF>Free file entries: 10<LF>SD card 0 detected, interface speed: 20.0MBytes/sec<LF>SD card longest block write time: 0.0ms, max retries 0<LF>MCU temperature: min 33.9, current 35.2, max 40.1<LF>Supply voltage: min 0.2, current 0.4, max 0.5, under voltage events: 0, over voltage events: 0, power good[Warning: Maximal number of characters per line exceeded! Check the line break settings in [Terminal > Settings... > Text...] or increase the limit in [Terminal > Settings... > Advanced...].]
I am in the HVAC and I struggle some,if someone could point me in the right direction it would be awesome. The Duetwifi board has worked great for along time until now.
Thanks in advance.

droftarts

@Camaro1 Have you recently tried to update the firmware on the Duet board? Your firmware shows quite an old version, 2.05.1. It's possible that you have overwritten the web interface files on the SD card with a newer, incompatible version.

To fix this, download the 'DuetWebControl-SD-2.0.7.zip' from https://github.com/Duet3D/RepRapFirmware/releases/tag/2.05.1
Unzip this, which should give you a folder called 'DuetWebControl-SD-2.0.7' with the following files in it:

css (folder)
favicon.ico.gz
fonts (folder)
index.html.gz
js (folder)

Rename the 'DuetWebControl-SD-2.0.7' folder to 'www'.
Remove the SD card from the Duet and plug it into your PC.
There should be a folder called 'www' on it. Delete this, and replace it with the 'www' folder you downloaded.
Replace the SD card back in the Duet, and see if you can connect to it.

When copying M122 output from YAT, please change the line break settings, so we can see the whole output. See https://docs.duet3d.com/en/How_to_guides/Getting_connected/Getting_connected_to_your_Duet#yat-settings

Ian