void setup() {
  Serial.begin(9600);
}

void loop() {
  // Send data to computer
  Serial.println("Hello from Arduino!");
  
  // Check for incoming data
  if (Serial.available() > 0) {
    char incomingChar = Serial.read();
    Serial.print("Received: ");
    Serial.println(incomingChar);
  }
  
  delay(1000);
}