const int IR_PIN = 2;         // Digital pin connected to the IR receiver
const int MAX_BITS = 32;     // Maximum number of bits to be received

void setup() {
  pinMode(IR_PIN, INPUT);    // Configure IR receiver pin as input
  Serial.begin(9600);        // Initialize serial communication
}

void loop() {
  unsigned long receivedCode = 0;   // Variable to store received code
  int receivedBits = 0;             // Variable to count received bits

  // Wait for the start of the IR signal
  while (digitalRead(IR_PIN) == HIGH);

  // Measure the duration of the pulses and spaces
  while (receivedBits < MAX_BITS) {
    unsigned long duration = pulseIn(IR_PIN, HIGH);
    receivedCode = receivedCode << 1;   // Shift previous bits to the left
    if (duration > 1000) {
      receivedCode = receivedCode | 0x01;   // Append a logic "1"
    }
    receivedBits++;
  }

  // Print the received code
  Serial.println(receivedCode, HEX);
}