[其他] 人体红外传感器HC-SR501

import RPi.GPIO as GPIO

import time



def init():

        GPIO.setwarnings(False)

        GPIO.setmode(GPIO.BCM)

        GPIO.setup(23, GPIO.IN)

        GPIO.setup(16,GPIO.OUT)

        GPIO.output(16, GPIO.LOW)

        pass

def led():

        GPIO.output(16, GPIO.HIGH)

        time.sleep(0.5)

        print "detct people led turn on"



def detct():

        for i in range(1, 31):

                if GPIO.input(23) == True:

                        print time.strftime('%Y-%m-%d %H:%M:%S',time.localtime(time.time()))+"  Someone is closing!"

                        led()

                else:

                        GPIO.output(16, GPIO.LOW)

                        print time.strftime('%Y-%m-%d %H:%M:%S',time.localtime(time.time()))+"  No one!"

                time.sleep(2) 

time.sleep(2)

init()

detct()

GPIO.output(16, GPIO.LOW)

GPIO.cleanup()

root@ton_tom:/home/python # python hc-sr501.py 

2022-02-14 17:26:08  Someone is closing!

detct people led turn on

2022-02-14 17:26:10  Someone is closing!

detct people led turn on

2022-02-14 17:26:13  No one!

2022-02-14 17:26:15  No one!

2022-02-14 17:26:17  No one!