rj45 to wifi

Hi! I've a smart TV connected to a rj45 cable. It's in a room with poor wifi. I'm looking for a wifi & rj45 extender. Must be connected to the lan via rj45. And I need to plug in the TV to another rj45. This way I'll maintain the TV connected by cable and boost the wifi signal in the room. Do...

Hi! We have our appartment that has RJ45 cabling and RJ45 wall plugs in each room. The router has WiFi enabled but cannot cover all rooms, the WiFi signal is weak in some spots. My idea is to connect some kind of WiFi emiting device in each room's RJ45 wall plug. But as a newbie, I am not sure...