@schillkroete In regard to hardware I made a typo, sorry. Have my mind preoccupied with hardware issues I am dealing with on my server, these are unrelated to Deco. With such an old firmware, upgrade...

@R3adyPlay3rOn3 Deco does not extend WiFi network of your router, even if you run Deco in Access Point mode. What you have done is created two different independent WiFi networks each broadcasting...

@schillkroete Consider upgrading M5 to latest hardware firmware, as a first step. You may need to do it manually, by downloading it from TP-Link Web site of your region. It might be possible that...

@ESIntegrators This document may help: How many Deco units can I add to my Deco mesh network?

@another123 If you want to keep Deco parental controls, that would mean running Deco in router mode. With that in mind, I am going to simplify your picture, leaving only relevant to your quesiton...

@kenlag It is recommended to turn off WiFi on existent router after Deco mesh is deployed. Deco does not extend existent router WiFi network, it creates own WiFi network. If you keep WiFi on at...