#define hot 6
#define normal 4 
#define cold 2
#define sense A0

float volts = 0.0;
float TempC = 0.0;
float hotTemp = 26;
float coldTemp = 20;
float sensor = 0.0;
void setup() {

  Serial.begin(9600);
  pinMode(hot,OUTPUT);
  pinMode(normal,OUTPUT);
  pinMode(cold, OUTPUT);
 
}

void loop() {
const float BETA = 3950; // should match the Beta Coefficient of the thermistor
 sensor = analogRead(sense);
  TempC = 1 / (log(1 / (1023. / sensor - 1)) / BETA + 1.0 / 298.15) - 273.15;


//Simulator examples
  //sensor = analogRead(sense);
  //volts = (sensor * 5000)/1024;
  //volts = volts - 500;
  //TempC = volts/10;

  if ( TempC < coldTemp ){
    digitalWrite(cold, HIGH);
    delay(1000);
    digitalWrite(cold,LOW);
  }
  else if ( TempC > coldTemp && TempC <= hotTemp){
    digitalWrite(normal, HIGH);
    delay(1000);
    digitalWrite(normal,LOW);
  }
  else{
    digitalWrite(hot, HIGH);
    delay(1000);
    digitalWrite(hot,LOW);
  }
  Serial.println(TempC);
}