const int tempr = A7;
const int LED = 8;

void setup() {
  // put your setup code here, to run once:
  pinMode(tempr, INPUT);
  Serial.begin(9600);
  pinMode(LED, OUTPUT);
  Serial.println("By: Arkan Asadil Huda");

}

void loop() {
  // put your main code here, to run repeatedly:
  const float BETA = 3950; // should match the Beta Coefficient of the thermistor
  int analogValue = analogRead(tempr);
  float celsius = 1 / (log(1 / (1023. / analogValue - 1)) / BETA + 1.0 / 298.15) - 273.15;
  int temp = analogRead(tempr);
  Serial.print("Raw: ");
  Serial.print(temp);
  Serial.println(" Ohm");
  Serial.print("Temp: ");
  Serial.print(celsius);
  Serial.println(" °C");
  Serial.print("================ ");
  Serial.print(millis()/10);
  Serial.println(" Ms");
  if (celsius > 40) {
    Serial.println("! Temp above 40°C !");
    digitalWrite(LED, HIGH);
    delay(100);
    digitalWrite(LED, LOW);
    delay(100);
  } else if (celsius < 0) {
    Serial.println("! Temp below 0°C !");
    digitalWrite(LED, HIGH);
    delay(100);
    digitalWrite(LED, LOW);
    delay(100);
  }
  delay(800);

}