/* STM32 Blue Pill project using the STM32 Arduino Core (stm32duino) */
//#include <LiquidCrystal.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#define LED PB4

// conexões do display LCD: (RS, E, D4, D5, D6, D7)
//LiquidCrystal lcd(PA0, PA1, PA2, PA3, PA4, PA5);
LiquidCrystal_I2C lcd(0x3F, 16, 2);

void setup() {
  Serial.begin(115200);
  Serial.println("Oi STM32!");
  Serial.println("Bem-vindo ao Wokwi! :-)");

  pinMode(LED, OUTPUT);

  //lcd.begin(16, 2);
  lcd.init();
  lcd.backlight();
  //lcd.setCursor(0, 0);
  //lcd.print("STM32 Blue Pill");
  //lcd.setCursor(0, 1);
  //lcd.print("Exemplo LCD");
  //delay(3000);
  //lcd.clear();
  //lcd.setCursor(0, 0);
  //lcd.print("Oi Pessoal!");
  
}

void loop() {
  digitalWrite(LED, LOW);
  delay(500);
  digitalWrite(LED, HIGH);
  delay(500);
  lcd.setCursor(0, 1);
  uint32_t n = millis()/1000;
  lcd.print(n);
}