// 2 itu pin di mikrokontrolernya / arduinonya
int tombol = 2;
int nilaitombol = 0;

void setup() {
  // put your setup code here, to run once:
  pinMode(tombol, INPUT);
  Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
  nilaitombol = digitalRead(tombol);
  Serial.println(nilaitombol);
  delay(1000);
}