Connect to Mav Air 2 from Android via Smart Controller

I’m not installing Litchi on the controller, but I want to use it from my android Tab S7. Can’t seem to get it to connect. Tried cable and blue tooth, couple different cables and connectors. Haven’t tried in a while, but I’m sure this worked a while back. No apps running on the controller. Any ideas?

Not enough information. Describe your setup. What controller are you using? How do you normally connect your tablet to the controller?