@Thackers I would recommend X20 or X60s, correct. If you have Ethernet cable in each room where you want to have excellent WiFi, and if you can place Deco there so that it is seen from every corner...

@MelbourneMaker I have somewhat simpler home network configuration, with just ISP Router, and Deco M5/M9 mesh running in Access Point mode. When I deployed my Deco mesh, I wanted to assign static IP...

@TheProphet M9 is more powerful unit than M5. Deco M9 will provide better WiFi coverage. Considering it is corners of your house that get weak WiFi signal now, it would make sense to spend more and...

@Thackers Replied to you here: https://community.tp-link.com/en/home/forum/topic/538184?replyId=1053928

@Thackers If every WiFi mesh unit is wired, it makes sense to acquire more lower hierarchy units. That is applicable to Deco and to any other WiFi mesh brand that allows to wire units. More wired...

@VocalOverdub I am thinking, if this could be a feasible workaround: Split (mentally) Deco subnet into two subnets. Move all IoT devices to one of subnets by assigning static IP addresses of that...