@Solla-topee Thanks for the assistance, let me reply to you:

I followed the steps in that link. Still the problem persists.

1. There is no problem in my local or remote network. I actually have two cameras installed next to each other, and the other one NEVER gets disconnected. Because of that I'm pretty sure that the problem is in the hardware of this one.

2. Network diagram: A wi-fi router is present on the exterior of my house (this was done to provide good signals to the cameras), and both cameras are present within 4-5 feet of the router. Inside the house, a smart tv, 3 mobile phones and 2 laptops are always connected to the wi-fi. They never face any disconnection issues, either.

3. I could not check the model number of the wireless router, but it is working well, like I said, because the other camera never goes offline. 

4. The offline issue happens 24x7. The camera is never online. It would only come online for a few minutes after restarting the power supply manually, and then goes back into an eternal slumber. It does not, ever, come back online unless i restart it manually.

5. In network connection it shows Ethernet (wired), even though I don't have any ethernet connection in the whole house. Everything is connected wirelessly to the router.

An important point I forgot to mention is that it sometimes shows 'offline' in the app, and the other times the camera footage and recordings just wouldn't load. It just says 'tap to refresh'. Refresh for hours, the footage never loads. Eventually it starts to show offline in the app.

  @Solla-topee Thanks for your assistance. Imma reconfirm the things you asked for:

1. Yes, the LED on the Tapo C310 is solid green even if it shows offline on the Tapo app.

2. Yes, I normally see the Ethernet(wired) connection on the Tapo app>camera's Device Settings>Device Info page. I can't check once it starts showing offline in the app (offc you know that, just saying).

I had enabled Diagnosis on the app a few days ago only... Problem is, the camera is planted at an inaccessible place, and I live away from home. When I get back home (in a week), then only I can provide you with the diagnosis file.

I have sent you the MAC address of the camera via private message.

  @Solla-topee Thank you for all the help! I have received the mail from the team. :)