I'm considering buying a mesh wifi network for my flat, because the signal is weak in some rooms of my concrete-walled flat. Something like Google WiFi. But they're very expensive.
The thing is, I already have built-in wired ethernet cabling that goes to every room. My fibre modem/router can plug into 4 ethernet sockets in the wall of the living room, and these lead to individual sockets in other rooms, and these are all tested and working.
So do I need a mesh system at all, or can I save money and get 'extenders' for each room, which simply plug into the ethernet sockets to connect to the main router?
Important: I want to have the same SSID/password everywhere; my device should not need to disconnect and reconnect as I move between rooms (at least not noticeably). I want it to just 'feel' like one network that works well in every room, like it usually does in corporate offices. And all devices should be able to see each other as devices on the same network, with consistent IP addresses, even if they're connected in different rooms.