How to Make Remote Door Lock

Circuit:

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const int irPin = 4;

const int Relay1 = 2;

const int led = 3;

boolean Relay1State = false;

void setup() {

  //Serial.begin(115200);

  pinMode(irPin, INPUT);

  pinMode(Relay1, OUTPUT);

  pinMode(led, OUTPUT);

  digitalWrite(Relay1, HIGH);

}

void loop() {

  int key = getIrKey();

  if(key == 3563 && 3425 && 3564 && 2343){

    Relay1State = !Relay1State;

    if(Relay1State == true){

      digitalWrite(Relay1, LOW);

      delay(1000);

      digitalWrite(Relay1, HIGH);

      delay(1000);

  }

    else

      digitalWrite(led, HIGH);

      delay(100);

      digitalWrite(led, HIGH);

      delay(100);

      digitalWrite(led, HIGH);

      delay(100);

      digitalWrite(led, HIGH);

      delay(100);

  }

}

int getIrKey(){

  int len = pulseIn(irPin,LOW);

  int key, temp;

  key = 0;

  //Serial.print("len=");

  //Serial.println(len);

  if(len > 5000) {

    for(int i=1;i<=32;i++){

      temp = pulseIn(irPin,HIGH);

      if(temp > 1000)

        key = key + (1<<(i-17));

    }

  }

  if(key < 0 )

    key = -key;

  //if(key)

    //Serial.println(key);

    delay(250);

  return key;

}