communication between android and arduino

For my project, I used Bluetooth as a connection between android and arduino. It's because bluetooth technology is inexpensive and low interference and also easy to install and control. Bluetooth doesn't required to think about setting up a connection or to push any buttons. When 2 or more device enter a range (up to 30 feet) of one another, they automatically begin to communicate without having to do anything.

schematic symbol with pin diagram

To make the communication between Android and Arduino easy, I must follow this step: 

step 1: make a app to Android which could communicate with other devices by bluetooth.

step 2: android application connect to arduino by bluetooth bee.

this application is a simple bluetooth connection with android. I just used smart phone, arduino main board, and bluetooth bee module to demo. I used adnroid application to create the program.

This is a basic classes that I need to know and create into Bluetooth program:

• BluetoothAdapter: Represents the local Bluetooth adapter (Bluetooth radio)
• BluetoothDevice: Represents a remote Bluetooth device, query information such as its name, address, class, and bonding state.
• BluetoothSocket: Represents the interface for a Bluetooth socket (similar to a TCP Socket).
• BluetoothServerSocket: Represents an open server socket that listens for incoming requests (similar to a TCP ServerSocket).
• BluetoothClass: Describes the general characteristics and capabilities of a Bluetooth device.

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