@Solla-topee Thank you for the answer, I' ve finally found the problem and it didn't depend on the cams but on the router: there were some rules to block completely Internet for some IP addresses and...

@Solla-topee Hi, I've read all the messages and tried the possible solutions but in my case the Tapo C200 cams still have a completely wrong date and time. What makes the situation even odder is that...