void setup() {
  // Start the serial communication at 9600 baud rate
  Serial.begin(9600);
  
  // Print a message to the serial monitor
  Serial.println("Enter a character:");
}

void loop() {
  // Check if data is available to read
  if (Serial.available() > 0) {
    // Read the incoming byte
    int incomingByte = Serial.read();

    // Print the received byte as a character
    Serial.print("I received: ");
    Serial.println((char)incomingByte);
  }
}