void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
}

void loop() {
  // put your main code here, to run repeatedly:
  // Declare and initialize the character array with a null terminator
  char greeting[] = "Hello, world!\0";
  
  // Use a loop to iterate through each character of the array
  // The loop continues until it hits the null terminator '\0'
  for (int i = 0; greeting[i] != '\0'; i++) {
    // Print each character of the array to the Serial monitor
    Serial.print(greeting[i]);
    delay(500); // to make it obvious it is printing char by char
  }

  // Print a newline after the greeting
  Serial.println();
  
  // Wait for a second before repeating the loop
  delay(1000);
}