#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd (0x27,16,2);

long bacaJarak (int triggerPin, int echoPin){
  pinMode(triggerPin, OUTPUT);
  digitalWrite(triggerPin, LOW);
  digitalWrite(triggerPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(triggerPin, LOW);
  pinMode(echoPin, INPUT);
  return pulseIn(echoPin, HIGH);
}
void setup() {
  Serial.begin(9600);
  lcd.init();
  lcd.backlight();
}

void loop() {
  int cm = 0;
  cm = (0.03446 * bacaJarak(7,8))/2;
  Serial.println(cm);
  lcd.setCursor(0,0);
  lcd.print("Jarak : ");
  lcd.setCursor(0,1);
  lcd.print(cm);
  lcd.print(" cm");
  delay(500);
}