@Carsonix It looks like a VLAN config issue, or Access Control config issue. Are you able to ping 192.168.0.1 from your testing PC(192.168.20.125)? If there is no ACL, no error on VLAN config, you...

@kingofpikachus TL-POE2412G should do the trick

@HandokoF "A VLAN in the same IP range as the IoT devices due to some technical reasons where a group of devices are connected on. And access to other VLANs" -Does that mean you want 802.1q VLAN to...

@kingofpikachus Could that be an issue on the PoE injector? I feel it is hardware issue.

@mode4 Yep you can connect 2nd CPE as AP to the Client CPE. Like this example, two CPE can be combined as a "repeater"

@uguryilmax Try a different channel. Maybe it's the DFS channel issue.(100-136 channels) DFS means when CPE detect there are something nearby using the same channel, it will stop broadcasting SSID...