#define ECHO_PIN 2
#define TRIG_PIN 3


void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(LED_BUILTIN,OUTPUT);
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
 digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
  int duration=pulseIn(ECHO_PIN, HIGH);
  float distance = duration *0.034/2;
 Serial.print("Jarak = ");
 Serial.println(distance);
 Serial.println("cm");

}