/*
 temp lights LM35 and leds
*/

int tempPin = A0;
int a;
const float BETA = 3950;
void setup() {
  Serial.begin(9600);
  pinMode (2, OUTPUT); //Blue LED symbolising Cold and Not Fit for Consumption

}
 
  void loop() {
  
int analogValue = analogRead(A0);
float a = 1 / (log(1 / (1023. / analogValue - 1)) / BETA + 1.0 / 298.15) - 273.15;
 
  delay(1000);
  if (a>=30) //when temp is between 0-35 degrees
  {
  digitalWrite(2, HIGH); //blue led is on
  }
else {
  digitalWrite(2, LOW); //blue led is on
}

  

 
  Serial.println(a);
   
    }