Is USB Debugging enabled on your MiBox android device?
Find “Build” in your android options and click it several (7 I think?) times. As you’re clicking it you should see it tell you how many more clicks until you’re a developer. Once you’ve enabled that, you should have a new menu called developer options. Go into there and enable USB Debugging.
Then try to set up the integration using your MiBox IP, auto, and leave ports as they are by default in the integration setup. You’re failing because the port is not being opened to listen for the connection without debugging being enabled. As Tars said, once the port is open/listening you’ll see the ADB connection pop up on your Mibox when you attempt to connect with the integration. You must approve this and you should be all set after that.
Just did my Hisense U6G last night with this. I did not need to do anything in the configuration.yaml file in order for it to create the entity. The integration took care of everything after i enabled USB debugging.