I really can recommend a Deco P7 mesh network of TP-Link. It’s a hybrid mesh network and I have one sinds about one year now. The one I have is a set of three nodes witch are covering: one in the souterrain, one fore the first floor and in front of the house and the bedrooms and one for the garden and backyard. The “outdoor node” hangs in a plastic sealbag in the garden cabin next to a Philips Hue bridge, witch manages the ligths in the backyard. They give me the finest coverage I can get.
The point is: they communicate to each other by WiFi, electric cicuit and LAN-cable. And while the 5Ghz doens’t like walls, steel or triple glass windows it goes by wire. The 2.4 Ghz however doens’t matter, it beams through those barriers anyway.
Most of your devices like cellphone, tablet etc will connect in the first place to the 5Ghz and will switch seamless and very smooth to the 2.4Ghz. The Deco P7 will manage that for you. Unless you make your settings not to do so. All the other switches and IoT devices do connect steady on there protocols to Homey.
I must say that I don’t have any problem of any interferences of signal by electrical wire transfer on any object.
What is all connected to my Deco P7?
5 adult user with they’re devices;
1 Google Assistant
1 Sonos speaker
2 Philips Hue Bridges
17 Philips Hue lights
4 Fibaro Roller Switches 3
1 Fibaro Double switch 2
2 Aqara doorswitches
1 Xiaomi Mibox8
1 Roborock S5
7 Osram Lightify switches
And every once in a while several guests who are using the separate guests network. You can also chose if you give them 2.4 Ghz or 5Ghz or both.
And last but not least: you get the best protection with the Deco. Also you can monitor the activities on the net and interfere if you want.
I hope you can get your benefits out of this post. And I really can recommend anyone who has difficulties by covering the house and surrounding with reliable Wifi.
Wish you success with your project!