#include <NewPing.h>
#define ECHO_PIN 8
#define TRIGGER_PIN 7
#define MAX_LENGTH 200

NewPing sonar (TRIGGER_PIN, ECHO_PIN, MAX_LENGTH);

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  Serial.println("Politeknik Negeri Jember");
  delay(1000);
}

void loop() {
  // put your main code here, to run repeatedly:
  delay(1000);
  Serial.print("Jarak = ");
  Serial.print(sonar.ping_cm());
  Serial.println(" cm");
}