from machine import Pin
import time
ledPinDo = Pin(2, Pin.OUT)
while True:
    ledPinDo.on()
    print("Đèn LED đã bật")
    time.sleep(2)
    ledPinDo.off()
    print("Đèn LED đã tắt")
    time.sleep(2)
    print("Hello, ESP32!")