#include <Arduino.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>

#define LCD_COLUMNS 16 // Number of columns in the display
#define LCD_LINES 2 // Number of lines in the display
#define LCD_ADDRESS 0x27 // Display address
LiquidCrystal_I2C lcd(LCD_ADDRESS, LCD_COLUMNS, LCD_LINES);

#define RELE_DIGITAL_PIN 2

void setup() {
  Serial.begin(9600);

  Serial.println("Estou aqui 1");
  lcd.init();
  Serial.println("Estou aqui 2");
  lcd.backlight();
  Serial.println("Estou aqui 3");
  lcd.clear();
  Serial.println("Estou aqui 4");

  pinMode(RELE_DIGITAL_PIN, OUTPUT);
}

void loop() {
  digitalWrite(RELE_DIGITAL_PIN, HIGH);
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Ligado");
  Serial.println("Ligado");
  delay(500);
  digitalWrite(RELE_DIGITAL_PIN, LOW);
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Desligado");
  Serial.println("Desligado");
  delay(500);
}