/*
  Blink LED with uart / printf
*/

int incomingByte = 0;

// the setup function runs once when you press reset or power the board
void setup() {
  // initialize digital pin LED_BUILTIN as an output.
  pinMode(LED_BUILTIN, OUTPUT);
  
  Serial1.begin(115200);
  Serial1.println("Press ENTER to start!");

  delay(500);
  
  // Wait until a newline character is received
  while (incomingByte != '\n') {
    if (Serial1.available() > 0) {
      incomingByte = Serial1.read();
    }
  }
}

// the loop function runs over and over again forever
void loop() {
  digitalWrite(LED_BUILTIN, HIGH);  // turn the LED on (HIGH is the voltage level)
  Serial1.print("LED is: ");
  Serial1.println(HIGH);

  delay(1000);                      // wait for a second
  digitalWrite(LED_BUILTIN, LOW);   // turn the LED off by making the voltage LOW
  Serial1.print("LED is: ");
  Serial1.println(LOW);
  delay(1000);                      // wait for a second
}