You must use an Android ( with OS 2.1 and later ) for my application IO Web Bluetooth top connect as modem for arduino board+bluetooth shield.
My sketch use the pin 13 for blink the led.
For IO Web Usb you need Android with OS 2.3 and later , usb cable , arduino with usb shield.My sketch use pin 3 for blink the led.
Led 1 :
ON /
OFF
Led 2 :
ON /
OFF
Flash light android :
ON /
OFF
A/C controller :
ON /
OFF
Servo 1 turn :
LEFT /
RIGHT