/* 
a program that reads sensor data from pin a3
and sends the data back to the computer
the light on the tearDrop board will turn on
if the incoming sensor readings are below
a certain threshold
*/

int sensorPin1 = 3;     //sensor is attached to pin a3
int sensorValue;        //a variable to hold the values we read from the sensor
int boardLED = 13;      //variable for the LED that is on the tearDrop board

void setup()
{
  Serial.begin(9600);
  pinMode(boardLED, OUTPUT);  //set the boardLED pin to be an output
}

void loop()
{
  sensorValue = analogRead(sensorPin1);
  Serial.println(sensorValue);
  if (sensorValue < 512)
  {
    digitalWrite(boardLED, HIGH);  //turn on the boardLED
  }
  else
  {
    digitalWrite(boardLED, LOW);  //turn off the boardLED
  }
  delay(100);    //wait for 100 milliseconds (1/10 of a second)
}