ADK

librerias https://mega.co.nz/#!Y1JyWRgb!Bft4z__q4Zu_QZQpW17Yy-9fQrCkOqtNB1H6_xu_G2g


#include <Max3421e.h>
 #include <Usb.h>
 #include <AndroidAccessory.h>
 #define  LED_PIN  13
 AndroidAccessory acc("Manufacturer",
   "Model",
   "Description",
   "1.0",
   "http://example.com",
                 "0000000012345678");
 void setup()
 {
   // set communiation speed
   Serial.begin(115200);
   pinMode(LED_PIN, OUTPUT);
   acc.powerOn();
 }

 void loop()
 {
   byte msg[0];
   if (acc.isConnected()) {
     int len = acc.read(msg, sizeof(msg), 1); // read data into msg variable
     if (len > 0) {
       if (msg[0] == 1) // compare received data
         digitalWrite(LED_PIN,HIGH); // turn on light
       else
         digitalWrite(LED_PIN,LOW); // turn off light
     }
   }
   else
     digitalWrite(LED_PIN , LOW); // turn off light
 }


el apk para el arduino