// Sensor Ultrasonic

const int trigPin = 19;
const int echoPin = 18;
const float speedOfSound = 0.034;

long duration;
float distance_cm;

void setup() {
  Serial.begin(115200);
    pinMode(trigPin, OUTPUT);
      pinMode(echoPin, INPUT);
      }

      void loop() {
        digitalWrite(trigPin, LOW);
          delayMicroseconds(2);
            
              digitalWrite(trigPin, HIGH);
                delayMicroseconds(10);
                  digitalWrite(trigPin, LOW);

                    duration = pulseIn(echoPin, HIGH);
                      distance_cm = duration * speedOfSound / 2.0;

                        Serial.print("Jarak = ");
                          Serial.print(distance_cm);
                            Serial.println(" cm");

                              delay(1000);
                              }