#define LED_PIN 13                            // defining pin 13 as the led input pin
#define DIGITAL_INPUT 3                   // defining digital input at pin 3
#define ANALOG_INPUT   A0            // defining analog input at A0

// initializing the variables
int    digital_output ;                          // This will read the digital value
int    analog_output ;                        // This will read the analog value
int    revised_output;                        // variable to store the corrected value
float  temp_C ;                                  // Variable for storing the temperature
float  temp_f ;                                  // Variable for storing the Fahrenheit
void setup ( )                                                                     // Anything written I it will run once.
{
  pinMode ( LED_PIN, OUTPUT ) ;                               // declaring pin 13 as output
  pinMode ( DIGITAL_INPUT, INPUT ) ;                   // declaring pin 3 as input
  pinMode ( ANALOG_INPUT, INPUT )  ;                 // declaring A0 as input pin
  Serial.begin ( 9600 ) ;                                            // selecting the baud rate at 9600
  Serial.println (" microcontrollerslab.com : The data is " ) ;
}
void loop ( )                               // Anything written in it will run continuously

{
  analog_output = analogRead ( ANALOG_INPUT ) ;         // Reading the analog value and storing in analog_output
  Serial.print ( " Analog value of the module is =  " ) ;                                       
  Serial.print ( analog_output ) ,  DEC ;                                    // This will display the analog value

  // The module has thermistor connection reversed
 revised_output= map ( analog_output, 0, 1023, 1023, 0 ) ;

  temp_C    = Thermistor ( revised_output ) ;

  temp_f = ( temp_C * 9.0 ) / 5.0 + 32.0 ;
  digital_output = digitalRead ( DIGITAL_INPUT ) ;
  Serial.print ( "   Digital value of the module is =  " ) ;
  Serial.println ( digital_output ) , DEC ;     // This will display the digital value on the display 
  Serial.print ( " LED is =" ) ;
  if ( digital_output == HIGH )   // The LED will turn on When the sensor value will exceed the set point
  {
    digitalWrite ( LED_PIN, HIGH ) ;
    Serial.print ( "ON " ) ;
  }
  else
  {
    digitalWrite ( LED_PIN, LOW ) ;
    Serial.print ( "OFF " ) ;   
  }
Serial.print ( " Measured Temperature = " ) ;
  Serial.print ( temp_f, 1 ) ;    // This will display the temperature in Fahrenheit
  Serial.print (" F  " ) ;
  Serial.print  (temp_C, 1 ) ;  // This will display the temperature in Celcius
  Serial.println (" C " ) ; 
  Serial.println ( ) ;     // Leaving a blank line
  delay ( 1000 ) ;       // Wait for 1 second
}
double Thermistor ( int RawADC )
{
double Temp ;
  Temp = log ( ( ( 10240000 / RawADC ) - 10000 ) ) ;
  Temp = 1 / ( 0.001129148 + ( 0.000234125 * Temp ) + ( 0.0000000876741 * Temp * Temp * Temp ) ) ;
  Temp = Temp - 273.15 ;     // This will Convert Kelvin to Celsius
  return Temp ;
}