How does HASSIO behave without wifi connection?

Hello. When I move HASSIO to other network, it cannot connect to wifi, so it cannot be reconfigured over its web page. What HASSIO does then? Does it create own wifi access point with captive portal to allow network configuration? Or it does nothing and needs to be connected with ethernet cable to get the wifi configured? Thank you

It does nothing.

A home automation system isn’t designed with portability in mind. Are you also moving all your other devices and sensors with you?

It’ll still work over wired ethernet.