int trigPin=7;
int echoPin=8;
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16, 2);  // Set the LCD I2C address



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() {
  lcd.init();
  lcd.backlight();
}

void loop() {
  lcd.clear();
  // put your main code here, to run repeatedly:
  int cm = (0.03446 * bacaJarak(trigPin,echoPin))/2;
  lcd.print(cm);
  lcd.print(" CM");
  delay(1000);
}