//22.11.4562 - Muhammad Guido Augusta

#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() {
  // put your setup code here, to run once:
  Serial.begin(9600);

  lcd.init();
  lcd.backlight();
  lcd.begin(16,2);
}

void loop() {
  // put your main code here, to run repeatedly:
  int cm = 0; //reset cm ke e
  cm = (0.03446 * bacaJarak (7,8))/2;
  lcd.setCursor(0, 0);

  Serial.print(cm);
  Serial.println("cm");

  lcd.print("jarak: ");
  lcd.setCursor(7, 0);
  lcd.print(cm);
  lcd.setCursor(10, 0);
  lcd.print(" CM");

  delay(500);
  lcd.clear();
}