아두이노 4핀 버튼 예제 (풀다운 저항)

int count =0;
int btn = 4; //버튼핀
//풀다운 저항 버튼 예제 BY KHOOKIE

void setup() {
  // put your setup code here, to run once:
  pinMode(btn,INPUT);
  pinMode(motor,OUTPUT); 

  Serial.begin(9600);

}

void loop() {
  // put your main code here, to run repeatedly:
  Serial.println(digitalRead(btn)); //버튼 입력 테스트
  delay(200);

  int push=digitalRead(btn);

  if(push==1)
  {
    //눌렀을때
    Serial.println("눌렀당");
  }
   if(push==0)
  {
    //떼었을때
    Serial.println("떼었당");
  }

  

}