from machine import Pin
from micropython import const
import time

# 定义红色 LED 使用的引脚
LED_RED = const(2)

led = Pin(LED_RED, Pin.OUT, value=0)  # 创建一个 LED 对象


while True:
    led.value(1)       # 点亮 LED
    time.sleep(0.5)    # 等待 0.5 秒
    led.value(0)       # 熄灭 LED
    time.sleep(0.5)    # 等待 0.5 秒