Unity and Arduino, help please!

Hi everyone!
I've a question about an unity project that connects android via bluetooth using an Arduino card.
I've never worked with Arduino and bluetooth, but I will explain better.
The Standard Asset of Android for the "First Person Controller" has two buttons: one for the character movement and the other for the camera movement. I want to connects AUTOMATICALLY (with no research of bluetooth devices but connects DIRECTLY with my Arduino Bluetooth Card) and using an Arduino's joystick for controlling the character.
Another thing: how can I use my smartphone's potentiometer instead of the rotation button?

Thanks in advance

 

Get the AdaFruit BlueTooth module. It automatically links at the correct baud rate. That will save your wall and forehead from damage. There is an asset on the Asset Store named Uniduino. Get that as well. Then head to the Arduino forums for scripts.