Edit to add: I also unblocked ports 29810-29816 on my router

 Hi @Vincent-TP 

 

Thanks for your reply. 

 

The AP does have internet access - I'm able to connect to its default SSID and use the internet as usual. 

 

In a factory reset state, I try to add the device via the app (serial number) and it successfully adds it to my controller (but says it is offline, and consequently it remains in a preconfigured state). Can it be failing to be assigned an IP address?

 

I have also logged into the AP (tplinkeap.net) and enabled controller access and also defined the Inform URL, incase these additional steps are necessary. 

  Hi @Vincent-TP 

 

Yes I can confirm that the access point does have an internet connection and yes it is plugged into the same switch as the other three access points.

 

I am using Cloud Essentials which I understood to be able to manage unlimited devices...is this not the case?

 

Here is a screenshot of the device list looks within the controller page.

 

Thanks again for your help - I really appreciate it. 

Hi  @Vincent-TP 

 

Thank you. The router is an Eero Pro 6. I am now using the 653 UR in a different building in standalone mode. To be honest I haven't tried adding it into the controller (I need to set up a separate controller as this building uses a different service provider. 

 

Thank you for opening the support case. I will follow up on this but may be delayed a few days as we are currently moving house. 

 

Thanks again for your help. 

Update: I have redeployed the AP to a different site where it adopted without issue. 

 

I don't need to add anymore APs to the original site, so although the issue didn't get solved, I don't need to solve it anymore. 

 

Thanks to all for your help.