#define TRIG_PIN 6
#define ECHO_PIN 5

void setup() {
  // put your setup code here, to run once:
pinMode(LED_BUILTIN, OUTPUT);// led menyala ketika menerima gelombang
Serial.begin(9600);
pinMode(TRIG_PIN, OUTPUT); //memantulkan gelombang
pinMode(ECHO_PIN, INPUT); //menerima gelombang
}

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);
// -----------proses pengiriman trigger dari arduino------//

long durasi = pulseIn(ECHO_PIN, HIGH);
float jarak = 0.034*durasi/2; //konversi cm
//-----------konversi waktu menjadi jarak dengan rumus d=Vxt-----------// 

Serial.print("Jarak : ");
Serial.print(jarak);
Serial.println(" cm");
}