#include <LiquidCrystal.h>

LiquidCrystal lcd(19,23,18,17,16,15);

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  
  lcd.begin(16,2);
}

void loop() {
  lcd.setCursor(0,0);
  lcd.print("Olá, mundo!");
  delay(3000);
  lcd.clear();
}