KY-026 Flame sensor tutorial

1#define led 3 // define the LED pin
2#define digitalPin 2 // KY-026  digital interface
3int digitalVal; // digital readings
4void setup()
5{
6  pinMode(led, OUTPUT);
7  pinMode(digitalPin, INPUT);
8  pinMode(digitalPin,  INPUT_PULLUP);
9}
10void loop()
11{
12  // Read the digital pin
13  digitalVal  = digitalRead(digitalPin);
14  if (digitalVal == HIGH) // if flame is detected  then
15  {
16    digitalWrite(led, HIGH); // turn ON Arduino's LED
17  }
18  else
19  {
20    digitalWrite(led, LOW); // turn OFF Arduino's LED
21  }
22}