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

#define led1     2
#define led2     4
#define tombol1 27
#define tombol2 26

void setup() {
  pinMode(led1,OUTPUT);
  pinMode(led2,OUTPUT);
  pinMode(tombol1, INPUT_PULLUP);
  pinMode(tombol2, INPUT_PULLUP);
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  lcd.init(); lcd.backlight();
  lcd.setCursor(3,0); lcd.print("Hello, world!");
}

void loop() {
  delay(10);
  if(digitalRead(tombol1)==LOW) {
    for(int i=0;i<20;i++) {
      lcd.setCursor(0,0); 
      lcd.print("TOMBOL 1 AKTIF  ");
      lcd.setCursor(0,1); 
      lcd.print("Nilai i=");
      lcd.print(i); lcd.print("   ");
      Serial.print("Nilai i = ");
      Serial.println(i);
      digitalWrite(led1,HIGH); delay(300);
      digitalWrite(led1,LOW); delay(300);
    }
    lcd.clear(); 
    lcd.setCursor(0,0); 
    lcd.print("PROSES SELESAI"); delay(1000);
    lcd.setCursor(0,0); 
    lcd.print("SELAMAT DATANG"); delay(1000);
  }
  
  if(digitalRead(tombol2)==LOW) {
    for(int i=0;i<50;i++) {

      Serial.print("Nilai i = ");
      Serial.println(i);
      digitalWrite(led2,HIGH); delay(300);
      digitalWrite(led2,LOW); delay(300);
    }
  } 
}