Need to upgrade my home wifi

I have red about the troubles, but never about the cause of the troubles. When you install a WiFi repeater, meshed or not meshed, you (shall) make a transparant tcp/ip network. You can verify that by tcp/ip pings. Most simply done by 2 computers and the ping command. If Homey requires more, then it would be nice that Homey states clear network requirements. Maybe Homey wants to be on the same IP network as all the devices, for example all have an ip address like 192.168.178.xxx ? Any other requirements?