//TMP36 Pin Variables
    int sensor1Pin = 1; // TMP36 inside
    int sensor2Pin = 0; // TMP36 outside

    int fan = 8;        // the number of the fan vcc pin
    int inPin = 7;      // the number of the input pin
    int led = 13;       // the number of the output pin

    int state = LOW;      // the current state of the output pin
    int reading;           // the current reading from the input pin
    int previous = LOW;    // the previous reading from the input pin

          // the follow variables are long's because the time, measured in miliseconds,
          // will quickly become a bigger number than can be stored in an int.
    long time = 0;         // the last time the output pin was toggled
    long debounce = 200;   // the debounce time, increase if the output flickers

    /*
     * setup() - this function runs once when you turn your Arduino on
     * We initialize the serial connection with the computer
     */
    void setup()
    {
      pinMode(inPin, INPUT_PULLUP);
      pinMode(led, OUTPUT);
      pinMode(fan, OUTPUT);
      Serial.begin(115200);  //Start the serial connection with the computer
                           //to view the result open the serial monitor
    }

    void loop()                     // run over and over again
    {
     //getting the voltage reading from the temperature sensor
     int reading1 = analogRead(sensor1Pin);
     int reading2 = analogRead(sensor2Pin);
     // converting that reading to voltage, for 3.3v arduino use 3.3
     float voltage1 = reading1 * 5.0;
     float voltage2 = reading2 * 5.0;
     voltage1 /= 1024.0;
     voltage2 /= 1024.0;

     // print out the voltage
     //Serial.print(voltage1); Serial.println(" volts(s1)");
     //Serial.print(voltage2); Serial.println(" volts(s2)");

     // now print out the temperature
     float temperatureC1 = (voltage1 - 0.5) * 100 ;  //converting from 10 mv per degree wit 500 mV offset
     float temperatureC2 = (voltage2 - 0.5) * 100 ;  //to degrees ((voltage - 500mV) times 100)
     float temperatureDifference = temperatureC1 - temperatureC2;
     Serial.print(temperatureC1);
     Serial.print("   (IN) || (OUT)   ");
     Serial.print(temperatureC2);
     Serial.print("    sisalla ");
     Serial.println(temperatureDifference);
     delay(100);

     reading = digitalRead(inPin);
     if (reading == HIGH && previous == LOW && millis() - time > debounce) {
        if (state == HIGH)
        state = LOW;
        else
        state = HIGH;

        time = millis();
     }
     digitalWrite(led, state);

     if (state == HIGH && temperatureC2 <= temperatureC1){            //  if
       digitalWrite(fan, HIGH);                      //
     } else {
       digitalWrite(fan, LOW);                       //
     }

     previous = reading;
 }