@Lous Your Satellite Deco are connected with Ethernet backhaul. They can use Ethernet cables, so we can assume these cables are fine. Next troubleshooting step. Have ISP Router in default router...

@Lous This is simple and straightforward setup, it should work. Because it does not, I would suggest you try troubleshooting steps to narrow down where the problem actually is. First of all, keep...

@OB99 What you have now on your home network is two routers connected to one another: Main Deco (router) connected to ISP Router. This should work fine most of the time, but occasionally may cause...

@OB99 Deco mesh will always transmit its own WiFi network. With you home setup, the optimal configuration is to run Deco mesh in Access Point mode, and turn off router WiFi. If necessary, buy one...

@TP-Link I have a question in regard to IoT network: I can configure preferred signal source for a client device on Main network. I can't configure preferred signal source for a client device on...

@David-TP I think I figured where the problem is. When I configure (add) new Smart Plug in Kasa app, it is properly shown in Deco app under Guest network. Then, when I open Smart Devices section in...