serial_test

void setup(){
  pinMode(13, OUTPUT);
  Serial.begin(9600);
}

void loop(){
  char input[30];
  
  int inputchar;
  inputchar = Serial.read();
 
  if(inputchar != -1 ){
    if(inputchar == 'a'){
      for(int i=0;i<5;i++){
        digitalWrite(13, HIGH);
        delay(250);
        digitalWrite(13,LOW);
        delay(250);
      }
    }else if(inputchar == 'w'){
      digitalWrite(13, HIGH);
      delay(1250);
      digitalWrite(13,LOW);
    }
  }
  else {

  }
}