@MichelR Main Deco must be connected by Ethernet cable, there is no way around it. The recommended solution, if you plan to keep E4, is to buy single Deco unit which has gigabit Ethernet ports, such...

@DeeBee86 You can move Main Deco away from the router, as long as Main Deco stays connected with Ethernet cable to router. Sorry, that's the requirement for Main Deco. The proper way to provide...

@OHO I do recall I saw forum topic where it were discussed that Deco might change its IP settings when it is configured in 192.168.[0-5].* IP ranges. I can't find original forum topic where it were...

@CMsc It looks as if Deco units can't keep gigabit speed through that cat6 cable and downgrade it to 100Mbps. I would suggest the following: configure Deco mesh to run in Access Point mode and, then,...

@ArjanBr As I said, it is not possible in Deco to block new clients that have correct WiFi SSID/password. The workaround is to switch Deco mesh to run in Access Point mode. See How to set up Deco to...

@JGO1 Have you tried connecting printer to the following: Guest network: 2.4GHz only, no password ------ If that does not work, repeat the same but with one more addition: Guest network: 2.4GHz only,...