// JOBSHEET 2

const int triggerPin = 8;
const int echoPin = 7;
const int LED1 = 4;
int buzzer = 3;

long durasi;
int jarak;

void setup() {
  pinMode(triggerPin, OUTPUT );
  pinMode(LED1, OUTPUT );
  pinMode(buzzer, OUTPUT );
  pinMode(echoPin, INPUT );

Serial. begin(9600);
}

void loop() {

  digitalWrite(triggerPin, LOW );
  delayMicroseconds(2);
  digitalWrite(triggerPin, HIGH );
  delayMicroseconds(10);
  digitalWrite(triggerPin, HIGH);
  durasi = pulseIn(echoPin, HIGH );
  jarak=durasi*0.034/2;

  if (jarak <= 10) {
    Serial. println("Jarak deka");
    digitalWrite(LED1, HIGH );
    delay(2000);
  }
  
}