I have bluetooth controller in picture. How do I use joystick and other 6 button on my android game?
I can acces only escape button on controller with (Input.GetKeyDown(KeyCode.Escape)) 
I use unity controller inputs with joysticks buttons and also I make sample project and uploaded to github GitHub - malisasmaz/Bluetooth_Controller_VR_Lioneye: I designed this controller package for my blueetooth controller(VR_Lioneye). I can not find any project with this controller. I convert my playstation 2 controller codes to this. I hope it helps!