from machine import Pin
import time 

pin_12=Pin(12,Pin.IN,Pin.PULL_DOWN)
pin_5=Pin(5,Pin.OUT)

status = 0
while True:
    if pin_12.value()==1:
        # 软件消抖
        time.sleep_ms(100)
        if pin_12.value()==1 and status==0:
            pin_5.value(not pin_5.value())
            status=1
        elif pin_12.value()==0:
            status=0