int val;

void setup() {
  Serial.begin(9600);                    // Start serial communication at 9600 bps
}

void loop() {
  val = analogRead(A0);//get data from the analog pin
  Serial.write(val/5);       // Write the data to the serial communication port        
  //Serial.println(val); // show the val data in the serial monitor

  delay(100);                            // Wait 100 milliseconds
}