#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,20,4);
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(4, OUTPUT);
  pinMode(2, INPUT);

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

void loop() {
  digitalWrite(4, LOW);
  delayMicroseconds(2);
  digitalWrite(4, HIGH);
  delayMicroseconds(10);
  digitalWrite(4, LOW);
  int waktu = pulseIn(2,HIGH);
  float jarak = waktu*0.035/2;

  float tinggi= 200-jarak;
lcd.setCursor(0,0);
lcd.print("tinggi");
 lcd.setCursor(0,1);
 lcd.print(tinggi);
lcd.setCursor(5,1);
 lcd.print("cm");

 delay(1000);
 lcd.clear();
  // put your main code here, to run repeatedly:
  delay(10); // this speeds up the simulation
}