PLEASE NOTE:

ARE YOU SURE THE WALL SOCKETS IN THE ROOMS YOU WANT TO CONNECT ARE ALL ON THE SAME CIRCUIT?

You can check this by switching off one of the "plug" circuit breakers on your home's main electrical board. All the wall sockets joined on that circuit (all the plugs that go off if you switch off that circuit breaker) can be connected via PowerLine.

YES I'M SURE

I've tested my house and PowerLine should work.

NO / I'M NOT SURE

Rather go for a wired solution if you're not sure.