Cross Platform Input Controller Not Working on Mobile Device - Questions & Answers - Unity Discussions
Controller Support & UI Optimisation in Unity - Ruya by Miracle Tea, Brad's Games
Beginning Unity 3D for iOS: Part 2/3 | Kodeco
Mobile Virtual Joystick Movement with Unity's Input System | by Micha Davis | Medium
Button keys in Unity(Edit -> Project Settings -> Input) for using a mini bluetooth controller for your game . I struggled a lot to figure these out. : r/unity