//TMP36 Pin Variables
int sensorPin = A3; //the analog pin the TMP36's Vout (sense) pin is connected to
                        //the resolution is 10 mV / degree centigrade with a
                        //500 mV offset to allow for negative temperatures
int blue = 4;
int red = 3;
int green = 2;
/*
 * setup() - this function runs once when you turn your Arduino on
 * We initialize the serial connection with the computer
 */
void setup()
{
  Serial.begin(9600);  //Start the serial connection with the computer
                       //to view the result open the serial monitor
  pinMode(blue, OUTPUT);
  pinMode(red, OUTPUT);
  pinMode(green, OUTPUT);
}

void loop()                     // run over and over again
{
 //getting the voltage reading from the temperature sensor
 int reading = analogRead(sensorPin);

 // converting that reading to voltage, for 3.3v arduino use 3.3
 float voltage = reading * 5.0;
 voltage /= 1024.0;

 // print out the voltage
 Serial.print(voltage); Serial.println(" volts");

 // now print out the temperature
 float temperatureC = (voltage - 0.5) * 10 ;  //converting from 10 mv per degree wit 500 mV offset
 if(temperatureC <= 25 && temperatureC < 23) {
   digitalWrite(green, HIGH);
   digitalWrite(red, LOW);
   digitalWrite(blue, LOW);
 }
 else if(temperatureC > 25) {
  digitalWrite(green, LOW);
   digitalWrite(red, HIGH);
   digitalWrite(blue, LOW);
  }
  else {
    digitalWrite(green, LOW);
   digitalWrite(red, LOW);
   digitalWrite(blue, HIGH);
   }


 //to degrees ((voltage - 500mV) times 100)
 Serial.print(temperatureC); Serial.println(" degrees C");

 // now convert to Fahrenheit
 float temperatureF = (temperatureC * 9.0 / 5.0) + 32.0;
 Serial.print(temperatureF); Serial.println(" degrees F");

 delay(1000);                                     //waiting a second
}