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

LiquidCrystal_I2C lcd(0x27, 16, 2);

// Buffer para armazenar conteúdo antes de enviar
char lcdBuffer[2][17]; // 2 linhas, 16 colunas + '\0'

void updateLCD() {
  for (int row = 0; row < 2; row++) {
    lcd.setCursor(0, row);
    lcd.print(lcdBuffer[row]);
  }
}

void setup() {
  lcd.init();
  lcd.backlight();

  // Preenche buffer
  snprintf(lcdBuffer[0], 17, "Temp: %2d C", 25);
  snprintf(lcdBuffer[1], 17, "Umid: %2d %%", 60);

  // Atualiza display
  updateLCD();
}

void loop() {
}