TV remote

tvremote.ino

#include <IRremote.h>  //include the IR library

//#define DEBUG 0 //enable debug mode
#define LED_PIN 13 //the pin showing the output

int IR_pin = 4; //digital pin connected to output of the TSOP

unsigned long currentCode=0,storedCode=0; //to store the recieved code for comparison
bool outputState = 0; //stores the default output state of the lED that is OFF

IRrecv irrecv(IR_pin); //create an IRrecv object


decode_results results; //object to store the decoded IR signal


void setup(){ //initial set up only runs once when the device is reset
  
  #ifdef DEBUG
  Serial.begin(9600); //start serial communication with the computer
  #endif
  irrecv.enableIRIn(); //start the reciever
  pinMode(LED_PIN,OUTPUT); //set the led pin as output
  digitalWrite(LED_PIN,outputState); //set the default output state  
}


void loop(){
  if(irrecv.decode(&results)){ //decode the incoming data if any
    currentCode = results.value; //store the recieved value
    #ifdef DEBUG
      Serial.println(currentCode);
      Serial.println(storedCode);
     #endif
    
    if(currentCode == storedCode){ //if the user sends the same code again
      outputState =!outputState; //toggles output
      #ifdef DEBUG
      Serial.println(outputState);
      #endif
    }
    
    storedCode = currentCode; //stores the previous value
    irrecv.resume(); //recieve the next value
  }
  digitalWrite(LED_PIN,outputState); //set the output state
  delay(100); //wait for 100ms
}