ilo.ino

#define RELAY_PIN (8)

void setup() {
  // put your setup code here, to run once:
  SERIAL_PORT_USBVIRTUAL.begin(115200);  // open serial connection via USB-Serial
  
  pinMode(RELAY_PIN, OUTPUT);
  pinMode(LED_BUILTIN, OUTPUT);		
}

void loop() {
  // put your main code here, to run repeatedly:
  int c = SERIAL_PORT_USBVIRTUAL.read();    // read from USB-CDC
  switch(c) {
    case '1': case 'y':
      digitalWrite(RELAY_PIN, HIGH);
      digitalWrite(LED_BUILTIN, HIGH);       
      delay(100);
      break;
    case '0': case 'n':
      digitalWrite(RELAY_PIN, LOW); 
      digitalWrite(LED_BUILTIN, LOW);
      delay(100);
      break;
    default:
      delay(10);
  };
}