I have recently purchased the tapoc500 camera initially it was working good but since last few days The camera goes offline and in the tapo app it shows offline and can't be accessed. It says the device is unreachable 

I have not done it any changes in my wifi connection it is as it was during the time of initial setup 

If I switch it off then turn it on it works fine for approximately 30 -45 minutes then goes offline again.

I have reinstalled the app many times but it has no effect 

What is solution to the problem