04_Serial_Read

const int led = 13;
void setup(){
  Serial.begin(115200);
  pinMode(led,OUTPUT);
}
void loop() {
  if (Serial.available()) {
    char userInput = Serial.read(); //문자를 입력받는 함수
    switch(userInput) {
      case 'n' : {
        digitalWrite(led,HIGH);
        break;
      } case 'f': {
        digitalWrite(led,LOW);
        break;
      } default : {
        break;
      }
    }
  }
}