Use the arduino commuication with through uart.It is an expamle test the uart inter

    String comdata = "";

    void setup()
    {
        Serial.begin(9600);
    }

    void loop()
    {
        while (Serial.available() > 0)
        {
            comdata += char(Serial.read());
            delay(2);
        }
        if (comdata.length() > 0)
        {
            Serial.println(comdata);
            comdata = "";
        }
    }