@TP-Link Thanks! I did "forget this network" and reconnected it (which probably then connected to the 2.4g) and the roomba connected to my deco system.

@Alexandre. Yeah I already enabled UPNP and my Main Deco is connected directly to the modem. I hooked up my TL-WR802N 2.4g router to my deco system and the roomba successfully connected to the 2.4g...

@Alexandre. Oh wow, thanks! This is really helpful. So i've tried it and 8080, 443, and 8883 worked but 123 didn't. This means that the ports isnt the problem right?

@Alexandre. How do I open the outbound ports on the firewall?

@ImtiazAli Which numbers do I put into the "internal port" and "external port"?

We recently bought a Roomba j7+ and tried connecting it to the app but it couldn't connect to the wifi. I then tried connecting it via hotspot and it worked. Could it be a firewall problem? Roomba's...