@TP-Link 

Hi and thanks for the reply.

I was actually going to do what you reccomend, with the second of the three P9 DECO's, leaving always the first (N.1) connected to the main router.

But since the N.2 ("corridor"), located one floor down from the open space loft, behind a corner and reacheable probably even by the wi-fi connection and not in the same "difficult" position as N. 3 ("studio") which is 2 floors down, in a soundproof recording studio, it may work, on the wi-fi.

Is there a way to know how one DECO is connected, wi-fi or powerline, a utility or a software, so that I can check if I swap N.2 and N.3 and see if the N.3, positioned in the Corridor (at the place of N.2) is working through the powerline ?

To answer your question, in the recording studio there are other power sockets of course but where the P9 is connected now is in the socket near the door so that in case of need I can just open it and it connects through the wifi, which is what I have been doing temporarily to solve the issue since it started. Again, it used to work great, with the door closed (it is a doble sound isolated door like in all recording musis studios), when the door was open it would work wi-fi, when the door was closed it switched to Powerline, worked great like that, no more now, when I close the door now the red light flashes and I have no internet connection in the studio.

Question to you : as I would try to swap N. 2 with N.3 as you reccomend, do I need to first  "remove" them from the DECO network first (via the smartphone app) and re-install them in their new location ? Or should I just swap the 2 units and see if they connect ?

thanks in advance for the reply, that way I can do this test and thanks for the assistance

Best regards

Roby

Milan, Italy

@TP-Link 

Hi, I think I found the solution :
I simply had to reset (with the little button) all the units, including the MAIN one..  obviously had to reconfigure the TP-LINK network, no big deal and re-install the main unit and the N.2. and N.3.
I also found out how to check the signal source on both N.2. and N.3, from the phone app, under the INTERNET screens for each unit, they seem to be both now as source "2.4Ghz/5Ghz - PLC"... Even in the soundproof music studio ow with the door closed, works like a charme...

The source stays the same "2.4Ghz/5Ghz - PLC".. even with the door closed and even if obviously connected through the PLC, correct ?...

thanks again, happy beginning of the year

Ciao

Roby