@WHE77ON You said you've got five Deco M4, but your diagram shows just four. Keeping fifth one as a spare, perhaps? If yes, it may come handy. Satellite Deco units prefer to connect to Main Deco...

@Nardol I would not call four Deco M5 in the three floors house "too many." See How many Deco units can I add to my Deco mesh network? There could be multiple reasons for disconnects, for example:...

@GraemeJK Is this what you want: Main Deco<--Ethernet cable-->Powerline Adapter #1<--Electric wiring-->Powerline Adapter #2<--Ethernet cable-->TV If yes, this should work. As long as you have good...

FLaTLinE wrote Current Environment: I live at a 3 floor house which is divided by think concrete (1-2 feet) Current Setup: I am currently using Google Wifi. Main node is in the 2nd floor. Wifi...

@Nobby If all your Deco units are wired, it does not matter if they are tri-band or not. You are not benefiting from tri-band, because third band is used only for WiFi link between Deco units. Deco...

@WadeWilson Looks like yours is not a fluke: forum post Deco M5 and TP-Link TL-SG1008D Switch Problems from 2018 confirms that strange discrepancy between TL-SG1008D and TL-SG1005D, when it comes to...