int sig = 2; // Pin to read the signal from

void setup() {
  Serial.begin(115200); // Initialize serial communication
  pinMode(sig, INPUT_PULLUP); // Configure pin 2 as input with pull-up resistor
  Serial.println("ESP32 Sender Initialized.");
}

void loop() {
  int signalState = digitalRead(sig); // Read the state of pin 2

  if (signalState == HIGH) {
    Serial.println('0'); // Send '0' when signal is LOW
  } else {
    Serial.println('1'); // Send '1' when signal is HIGH
  }

  delay(100); // Add a small delay to ensure the receiver processes data correctly
}