int led=13;// defin the LEd pin
int digitalPin=2;// KY-028 digital interface
int analogPin = A0;// KY-028 analog ininterface
int digitalVal;// digital readings
int analogVal;//analog readings
void setup()
{
  pinMode(led, OUTPUT);
  pinMode(digitalPin,INPUT);
  //pinMode(analogPin, OUTPUT);
  Serial.begin(900);
}
void loop()
{
  // Read the digital interface
  digitalVal = digitalRead(digitalPin);
  if(digitalVal == HIGH)// if temperature threshold reached
  {
    digitalWrite(led,HIGH);// turn ON Arduino's LED
  }
  else
    {
      digitalWrite(led,LOW);// turn OFF Arduino's LED
    }
    // Read the analog interface
    analogVal = analogRead(analogPin);
    Serial.println(analogVal);// print analog value to serial
    delay(100);
  }