const int tSensPin = A0; 
  const int ledNormalPin = 5;
  const int ledAlarmPin = 6;
  const int ledAvaryPin = 7;
  const float BETA = -24; // should match the Beta Coefficient of the thermistor

void setup() {
  // put your setup code here, to run once:

pinMode(ledNormalPin, OUTPUT);
pinMode(ledAlarmPin, OUTPUT);
pinMode(ledAvaryPin, OUTPUT);

Serial.begin(115200);
}

void loop() {
  // put your main code here, to run repeatedly:





float temperature = analogRead(tSensPin);
float celsius  = 1 / (log(1 / (1023. / temperature - 1)) / BETA + 1.0 / 298.15) - 273.15;

if (celsius > 20) {
  digitalWrite(ledAvaryPin, HIGH);
  digitalWrite(ledAlarmPin, LOW);
  digitalWrite(ledNormalPin, LOW);
} else if (celsius <= 20 && celsius > 15){
digitalWrite(ledAlarmPin, HIGH);
digitalWrite(ledAvaryPin, LOW);
digitalWrite(ledNormalPin, LOW);
}else  {
digitalWrite(ledNormalPin, HIGH);
digitalWrite(ledAvaryPin, LOW);
digitalWrite(ledAlarmPin, LOW);
}

Serial.println(celsius);
delay(2000);
}