I have 8 cameras and one doorbell. All went off at 5 pm yesterday. None will reconnect. All show offline. Everything else in the house works well, all google speakers, wifi TV, Wifi thermometers, other 3 TP-link cameras, etc. Internet work well. ISP provider remotely check modem everything is ok. Restarted modem 5 times, everything connects except for all the WYZE cameras. Restart my cell phone, removed readded the app. Unplugged all cameras, reset modem, replugged cameras, nothing works! Tried doing Set-up new device and that does not work either. Any ideas on how to get my cameras back?
Does your router see them connected to WIFI?
Anything in the router logs showing that something is being blocked? Many routers are including malware protection these days and it can be prone to false positives (ISP owned routers can be especially problematic). Maybe they pushed out a new definitions file around that time yesterday.
shows they are there but offline.
same router for last 6 years. ISP provider virtual checked router said all is well and nothing hast changed in the past week (no updates, or other changes). The only things that do not work are the wyze products. Everything else works great.
The Wyze Guys will have excuses for loss of connectivity that will point to your network even though everything else in the network that is not Wyze is working just fine.
It’s Wyze not you…..
Can you clarify, does the router show they are connected to wifi or is it just showing them as devices that were previously connected?
I opened 2 tickets/logs yesterday and today all cameras are up and working.
I guess they found a fix!
They were showing as connected with very good connection speeds. Connected and working. I open 2 tickets, one for the doorbell and one for the cameras yesterday. and today they are all working.
So as usual it wasn’t the customers network it was Wyze 
May be coincidence, or may be they found something. Usually they don’t get tickets resolved that quickly but who knows. Maybe they’ll give you feedback on what it was for reference (if they in fact did anything).
Could also be that your ISP got complaints about certain things not working and resolved an issue with your service or routing on their network. Guess the important part is that it is working now.