@MikeUtan Hopefully M5 with manual configuration should be enough. In case it comes to buying Deco M9 Plus, its beta firmware discussed here: https://community.tp-link.com/en/home/forum/topic/574954...

@MikeUtan Well, and if that does not work you can try your original plan of making M5 Main Deco, but I doubt that would work either. You can try. Also, for the reference: Changing the Main Unit for...

@MikeUtan I would recommend M5, but not for the Main Deco. TP-Link released firmware 1.6 for Deco M5 that allows to manually configure where Satellite Deco should connect. Get Deco M5, place it in...

@David-TP >or the network map, would it be possible to have the icon instead of the word "Ethernet". Expanding on that idea: would be useful if there is different icon for 10/100/gigabit/etc, or...

@Alexandre1969 This is somewhat common situation, when someone tries WiFi mesh and finds device in the household that can't work with WiFi mesh. That same device works just fine with non-mesh WiFi....

@Curiosity898 Deco E4 is the only exception: any other Deco model with Ethernet ports is gigabit or better. I would suggest Deco M4 or S4, both look very similar to E4, but they are with gigabit...