@NDK How do you connect the DVR to the Deco network? By wired cable or wireless? It seems that the static IP of the DVR is the root cause; try to change it to dynamic IP on DVR; if you need fixed IP...

@broxtor I see, thanks for your reply. There is a beta firmware which can be used to solve this issue; you can install it and verify whether it works. I will email you that, please check your inbox....

@xtremerox Thanks for your valued reply. Sorry for the mistake, I may typed the information which mentioned by other users. Back to your case, cause the channel may change to N/A, try to fix it, like...

@guicadier You are welcome, glad to help. Best regards.

@pied314per With IFTTT, we can get all devices that have connected to the TP-Link router, but there is no option to get the list of devices from Archer C5400 directly.

@SaMuElSerge Hello, you need copy the whole link and paste it in the address bar of a web browser to get it. After that, try to install it and verify whether it works.