@AlbertH999 I would recommend leaving Deco mesh in AP mode. Way less settings to configure and maximum WiFi performance it can deliver at your place. Just note, there is a bug it Test Internet Speed...

@MartinMartin I am going to give up on this, sorry. Perhaps, someone will have suggestions to share. To summarize, this is what you have: symmetrical Internet link and asymmetrical speed test results...

@Sangello If they are shown as connected by Ethernet, everything is fine. This is known issue. At least, I know it for all three years I own Deco mesh. Once, I was running full PC image backup to...

@Sangello Do you see these devices in Deco app and do they show as connected with Ethernet?

NetStream wrote @Alexandre. I kinda feel that covering the entire house with X series seems kinda overkill. I thought using satellite decos of either M4 or M5 @NetStream You can. TP-Link promises...

@KieuNhat See this TP-Link FAQ, which will provide the solution: Connection Preference: Customize Your Preferred Signal Source