Cannot separate 2.5GHz with 5GhHz

[AmilaMG]

I have the new 5GEE Router. There is no way to separate 5 and 2.4 in the router menu. Is there a way to do that separation. Because im relying on 2.4Ghz to connect my smart switches. Screenshot as below

[XRaySpeX]

What does the "2.4 & 5GHz WiFi" > "Both enabled" dropdown show?

[AmilaMG]

Hi,

It shows below menu. But when i switch it doesn't change the GHz. I tried changing this but connecting switches was unsuccessful. Previous router had this separation clearly this one doesn't have that unfortunately. 

[XRaySpeX]

Yes, it looks like you can only have either Both unseparated, 2.4 only, 5 only or none.

As you cannot separate the wireless bands/SSIDs, the most you can do is temporarily enable the 2.4 GHz band only while connecting problematic 2.4 GHz devices before reenabling both bands..