I got the firmware update for my 5300 and no matter what combination I use to connect my IoT devices, none of them will connect. I've tried the main SSID, the IoT SSID as well as the guest network....

I wish I had known this was a thing before I bought this TP-link junk. How many people have complained about this and they don't care or do anything about it? No wonder there are so many refurbs...