/medium.com/@shfamrsya/lcd-i2c-dengan-esp32-menggunakan-ide-arduino-31fd4f2f4e49
#include <LiquidCrystal_I2C.h>
int btnLantai1 = 2,btnLantai2 = 4,btnLantai3 = 16;
int lift;
int lcdColumns = 16;
int lcdRows = 2;
int posisi = 1;
LiquidCrystal_I2C lcd(0x27, lcdColumns, lcdRows);

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  lcd.init();
  lcd.backlight();
  pinMode(btnLantai1, INPUT_PULLUP);
  pinMode(btnLantai2, INPUT_PULLUP);
  pinMode(btnLantai3, INPUT_PULLUP);
}

int checkButten(){
  if (digitalRead(btnLantai1)){
    return 1;
  }else if (digitalRead(btnLantai3)){
    return 3;
  }else if (digitalRead(btnLantai2)){
    return 2;
  }else{
    return posisi;
  }
}

void loop() {
  lcd.setCursor(7, 0);
  Serial.println(digitalRead(btnLantai1));
  // int ditekan = checkButten();
  // if (ditekan!=posisi){

  //   String arah = (ditekan > posisi) ? "UP" : (ditekan < posisi) ? "DOWN" : "STUK";
  //   lcd.print(arah + " " + String(ditekan));
  //   Serial.println(ditekan);
  //   posisi = ditekan;
  // }

  
  // put your main code here, to run repeatedly:

  delay(100); // this speeds up the simulation

}