raspberry pi (4) 继电器，激光传感器

1. 继电器

import RPi.GPIO as GPIO 
import time

RelayPin = 11    # pin11 

def setup():
    GPIO.setmode(GPIO.BOARD)       # Numbers GPIOs by physical location
    GPIO.setup(RelayPin, GPIO.OUT)
    GPIO.output(RelayPin, GPIO.HIGH)

def loop(): 
    while True:
        print('...relayd on')