int trigger = 5, echo = 4; long durasi, jarak;

void setup() {
  Serial.begin(9600);
  pinMode(trigger, OUTPUT);
  pinMode(echo, INPUT);
}

void loop() {
  digitalWrite(trigger,LOW);
  delayMicroseconds(2);
  digitalWrite(trigger, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigger,LOW);
  durasi= pulseIn(echo,HIGH);
  jarak = durasi*195/1000;
  
  Serial.print("jarak : ");
  Serial.print(jarak);
  Serial.println(" cm");
  Serial.println("    ");
    delay(1000);
}