arduino-serial-io

arduino-serial-io.ino

void setup() {
  Serial.begin(9600);
  pinMode(LED_BUILTIN, OUTPUT);
}

void loop() {
  String lolkek = Serial.readString();

  lolkek.trim();

  if (lolkek == "on") {
    digitalWrite(LED_BUILTIN, HIGH);
  }

  if (lolkek == "off") {
    digitalWrite(LED_BUILTIN, LOW);
  }

  if(lolkek.length() > 0) {
    Serial.println(lolkek);
  }
}