@RobWilcox Then I have no idea now. You may need to capture package from router WAN, to see if there is any problem on communication to the cloud server. You can access the controller in local LAN so...

@CK1710 You understanding is correct.

@PiLYo1 It seems you have Etherent connection between site A and site B LAN(via site C switch)? I'm not sure how you make it work, but anyway I can see you have Internet access on bother site A and...

@CK1710 That's right. If you want to add your mobile phone, just modify the rule 1 and 2 and add mobile phone's IP to the source group.

@PiLYo1 Not really. EAP225-outdoor injector(in the EAP225-Outdoor package) is a passive PoE injector. However EAP-Wall only supports Standard PoE 802.3 af/at. I will not suggest you use...

@nriddhi I suggest CPE710 but I actually do not have one. I had CPE510 and my scenario is not 3km that far away. Tp-link said CPE510 can reach 5km and CPE710 can reach 30km, but you know it is just...