@jay_s_uk Thanks for that hint. I shut down the system to get a break and some food. After my breake i turned everything on and it woked after flashing the DuetWiFiServer.bin and firmware again. I was thinking about replacing that cheap china sd card while having the break but wasn´t shure because everithing else was working.
Thanks for your Answer! I will observe the system after changing to a sundisk sd and give feedback if it happends again, have a nice day.
@jay_s_uk Thanks for that hint. I shut down the system to get a break and some food. After my breake i turned everything on and it woked after flashing the DuetWiFiServer.bin and firmware again. I was thinking about replacing that cheap china sd card while having the break but wasn´t shure because everithing else was working.
Thanks for your Answer! I will observe the system after changing to a sundisk sd and give feedback if it happends again, have a nice day.
Hi,
it would be perfect to get so Help for my little project here:
Problem:
New printer set up Tronxy X5SA Pro with Duet2Wifi board. Yesturday i was solving a lot of Problems on my system bed leveling axis movement etc.
Today i have started the system and the DWC doesent work anymore 
. Ihave no Idea what happend over night.
I found that section while i was troubleshooting my wifi module:
Also in the M122 Network diagnostics check the WiFi Module Reset Reason. It should be "turned on by main processor". If it is anything else (e.g. "exception"), report the problem on the forum.
And here i am.
My Steps so far:
Wifi Signal strength is ok with -54dB "-30 to -50 are good, -50 to -60 is OK, -60 to -70 is marginal"
I am able to ping my system via cmd.
I was getting this error once: duet 2 wifi reported error incomplete write but it never appeared again.
I was trying to set the wify server up after erasing the whole Duet didn´t work aswell.
Now i might try to go back to a older version of DWC of something.
Would be nice if anyone has further ideas.