Use APKPure App
Get Arduino Codes Free old version APK for Android
This application had variety of Arduino code example
This application had variety of Arduino code to use for your example.For an example ,
1)LCD
2)Servos
3)Piezo
4)Rotary Encoder
and many more
This code can be combined with bluetooth control device if the code been adjust.By using arduino programing sofware user can upload the code to Arduino and test the code.
Thank you