Roomba connect to Smartthings WiFi?

Hi I own the smartthings WiFi, and a Roomba i7.

When I try to connect the room a to the WiFi, it can’t obtain a connection. I’m not even trying to integrate or do an automation, just set it up to the WiFi.

Tech support said to connect it to the 2.4 ghz band, is there a way through plume or smartthings apps to do this?

Any other suggestions?

I wish I could help you, but I only have the Smarthings Hub v3 running off a Synology router. I have a Roomba i7+ (One of my favorite smart home devices, my August Automower 430XH robot lawnmower is the other!) and want to have it integrated with my Smartthings system.