@luisitooo The devices at this link https://www.tp-link.com/en/exhibition/tr-369-compatible-devices/ are all supported by the TR369/USP protocol, as far as I know. But...

@alex911kz I think you meant to say link aggregation. This gateway does support link aggregation, but in a sense that, for example, if you connect two PCs to this router, the two PCs will share that...

@alex911kz The ER605 itself is a NAT device. As long as you don't set port forwarding entry, the device is not accessible in from the WAN side by default, which is what NAT is for.

@JamesLattanzio Change the channel width to 20M and test with the different channel, it may also be a problem with the 5G DFS channel. Is there a radar signal or something in the vicinity of these...

@Yashar The IP addresses of the EAP and the controller are not in the same network segment and cannot communicate with each other, you can try reboot the EAP. Alternatively, you can forget the EAP...

@richardclarke79 The port between the switch and the EAP needs to be set to Tagged, also the EAP610 cannot set a PVID on the port, it can only be in a VLAN.