String data="";  //used to receive serial messages

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

void loop() {
  delay(100);
}

void serialEvent() {
  data="";
  while (Serial.available()) {
    // get the new byte:
    char inChar = (char)Serial.read(); 
    // add it to the data:
    if (inChar == (char)10)
    {
      break; //break message on newline
    }
    data += inChar;
  }
  //data should be ready now.  What should we do with it?

  if (data=="hello")
  {
    Serial.println("tts.speak&&hi there");
  }

  //Analog Read - Pin #
  else if (data.startsWith("ar."))
  {
    String strPin = data.substring(3);
    int whatPin = atoi(strPin.c_str());
    int v = analogRead (whatPin);
    Serial.println("VC.TriggerEvent&&Analog.Pin&&"+strPin+"&&"+v);
  }

  //DigitalWrite HIGH - Pin #
  else if (data.startsWith("dw.high."))
  {
    String strPin = data.substring(8);
    int whatPin = atoi(strPin.c_str());
    pinMode(whatPin, OUTPUT);
    digitalWrite (whatPin,HIGH);
  }

  //DigitalWrite LOW - Pin #
  else if (data.startsWith("dw.low."))
  {
    String strPin = data.substring(7);
    int whatPin = atoi(strPin.c_str());
    pinMode(whatPin, OUTPUT);
    digitalWrite (whatPin,LOW);
  }

  //unknown command
  else
  {
    Serial.println("VC.TriggerEvent&&Arduino.error&&"+data);
  }

  //clear data for next time
  data="";
}