Xiaomi Gateway : Will it work after disabling internet access?

Add-ons Bindings
1

I’ve used my router to block internet access to the Xiaomi hub and immediately in the Xiaomi phone app I can see that it’s gone offline.

I can still see my temp sensors updating in OpenHAB which is great…
I can also see the ambient light sensor in the hub is reporting it’s levels to OpenHAB…

However I don’t seem to be able to control the LED in the hub any more… Is this just how it is or is something wrong?

2

I block Internet for the hub and don’t have any issues. I don’t try change the hub led so not sure if it’s a problem.
I don’t use the phone app at all (uninstalled)

3

Same here.

Still works fine.

4

Without the app and with blocked access to the gateway, can you add new devices to the gateway (I’ve just bought some Xiaomi gear).