ReadingTemperatureSensor.ino

// TMP36 Pin Variables
// 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 sensorPin = 0;
void setup()
{
  Serial.begin(9600);  //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 reading = analogRead(sensorPin);  
 // converting that reading to voltage, for 3.3v arduino use 3.3
 float voltage = reading * 5.0;
 voltage /= 1024.0; 
 // now print out the temperature
 // converting from 10 mv per degree wit 500 mV offset
 // to degrees ((voltage - 500mV) times 100)
 float temperatureC = (voltage - 0.5) * 100 ;  
 // print temperature reading
 Serial.println(temperatureC);
 // wait 100ms 
 delay(100);
}