As usual cant connect to wifi

Hi,So Im having problems connecting my ring chimes to the app. I have 4 pcs 1st gen and 4 pcs 2nd gen. at 1 point all of the 1st gen are working and all the 2nd gen were working too. what happened is that there was a black out which is frequent on where i live and after that they wont connect anymore. so here are the stuff i already tried that didnt work.-i tried to delete them from the app and then add again-i tried to reconnect with the app-i connected to someone elses wifi and then tried to reconnect back at home-i have 2.4ghz router which i also tried and i used all the channels nothing worked. i was so determined to make it work so i tried everything but no luck.-i tried “resting” them for months and trying again but no luck-i tried reinstalling the app-i tried a new phone-i tried a different phone both iphone and androidi have alot more smart devices at home. even china brand stuff with no problems. the only device that isnt working is this. the doorbell itself doesnt have any problem. i have 140sqm home with 5 google wifi routers, its pretty much full bar inside the house. the only one with bad signal is the doorbell outside.Any suggestions? getting desperate here. Karl