@Kaneco With Deco running in AP mode IP addresses are managed by your Router TP-Link TL-R605. Check if it perhaps runs out of IP addresses. That could happen if you have many devices using randomized...

@luisalonsoramos It is most likely D-Link switches that are the problem. You can test that quite easily. Bring secondary P9 to where Main Deco is and connect them directly to each other: Internet ->...

@Dean069 You can power off Deco unit for as long as you need to. It will remember its settings.

@Sah123 You can run two more tests: 1. Set Guest network with 2.4GHz, very simple SSID such as 123456 (digits only) and without password, and see if Ring doorbell will connect to it. If it does, the...

@Dean069 It should work, but you can easily test it without running cable all the way to the shed. Just get that 35m cable, and connect two Decos with it indoors. If that works, now you can run that...

@GoKiwi If you check Deco E4 specs, you will find it has 100Mbps Ethernet ports. This is what limits Internet connection speed via the Deco E4. If you can return that set, send it back and replace...