@David-TP Yes, 3rd still be main eco and the 1st floor Deco M4 work well if it is also connected wirelessly to the other satellite M4. I was connect ethernet cables from 3rd to 2nd then from 2nd to...

I am currently using 3 devices for 3 floors of my house: - The 3rd floor is the main node (with a connection cable from Viettel's Modem Router) - The 2nd floor is the secondary node (captures wifi...