int led_pin = 13 ;// initializing the pin 9 as the led pin
 
int flame_sensor_pin = 8 ;// initializing pin 12 as the sensor output pin
int flame_pin = HIGH ; // state of sensor
 
void setup ( ) {
 
pinMode ( led_pin , OUTPUT ); // declaring led pin as output pin
pinMode ( flame_sensor_pin , INPUT ); // declaring sensor pin as input pin for Arduino
Serial.begin ( 9600 );// setting baud rate at 9600
}
 
void loop ( ) {
flame_pin = digitalRead ( flame_sensor_pin ) ; // reading from the sensor
if (flame_pin == LOW ) // applying condition
{
Serial.println ( " FLAME , FLAME , FLAME " ) ;
digitalWrite ( led_pin , HIGH ) ;// if state is high, then turn high the led
}
 
else
{
Serial.println ( " no flame " ) ;
digitalWrite ( led_pin , LOW ) ; // otherwise turn it low
}
}