TMP36 + RCSwitch Arduino Temperature Controller Demo

#include <RCSwitch.h> //only used for remote control switches, not used if you have a relay

#define aref_voltage 3.3         // we tie 3.3V to ARef and measure it with a multimeter!

//TMP36 Pin Variables
int tempPin = 1;
int tempReading;

float desiredTempC = 28; // which temperature to maintain

RCSwitch mySwitch = RCSwitch();

void setup(void) {
  // We'll send debugging information via the Serial monitor
  Serial.begin(9600);
  // If you want to set the aref to something other than 5v
  analogReference(EXTERNAL);
  //enable RC switch transmissions on pin 10.
  mySwitch.enableTransmit(8);
}


void loop(void) {

  tempReading = analogRead(tempPin);

  // converting that reading to voltage, which is based off the reference voltage
  float voltage = tempReading * aref_voltage;
  voltage /= 1024.0;

  // now print out the temperature
  float temperatureC = (voltage - 0.5) * 100 ;
  Serial.print(temperatureC); Serial.println(" degrees C");

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

  if(temperatureC < desiredTempC){
    mySwitch.switchOn(1,1);
    Serial.println("Heater ON");
  }
  else{
    Serial.println("Heater OFF");
    mySwitch.switchOff(1,1);
  }


  delay(1000);
}