Python Raspberry Pi 上多个 PIR 运动传感器的代码

Question

为一个项目在 raspberry pi 上连接最多三个 5v 运动传感器，我对 python 还很陌生。我已经成功地编写了一个运动传感器，它会在检测到运动时点亮 LED 并发出蜂鸣声。我如何编写多个传感器然后点亮不同的 LED？

# Motion detected with buzzer and LED

import RPi.GPIO as GPIO
import time

GPIO.setwarnings(False)

#Refer pins by their sequence number on the board
GPIO.setmode(GPIO.BCM)

#Read output from PIR motion sensor
GPIO.setup(18, GPIO.IN)

#LED output pin
GPIO.setup(3, GPIO.OUT)

while True:
    inp = GPIO.input(18)
#When output from motion sensor is HIGH
    if inp == 1:
    print("Motion detected!!")
    GPIO.output(3, 1) #Turn on LED & Buzzer
    time.sleep(1)

#When output from motion sensor in LOW
    elif inp == 0:
    print("No motion, all okay.")
    GPIO.output(3, 0) #Turn off LED & Buzzer
    time.sleep(1)

time.sleep(0.1)

Answer 1

您应该为您的传感器创建不同的实例，例如

inp_a = GPIO.input(18)
inp_b = GPIO.input(1x)

等等。

然后你可以检查

if inp_b == 1

你也可以实现多线程

另外请注意，while 循环之后的最后一行代码将永远不会执行。

Answer 2

如果以后有人想在树莓派 4 上使用一对 PIR 运动传感器，上面的代码帮助我解决了这个问题。下面的代码是我如何使用它的。

motion_1 = GPIO.add_event_detect(pirPin, GPIO.RISING, callback=LIGHTS)
motion_2 = GPIO.add_event_detect(pirPin2, GPIO.RISING, callback=LIGHTS2)                                                                                                                                                                            

try:
    while True:
          if motion_1 == 1:
              motion_1
              print('Test for BTC') # print in command line , not LCD
              time.sleep(1)
          elif motion_2 == 1:
              motion_2
              print('Test for eth') # print in command line, not LCD
              time.sleep(1)

except KeyboardInterrupt:
    print('Quit')
    GPIO.cleanup()

 ## the lights function being called above, pulls data from binance API, and prints out the price to an LCD screen, so i can trigger a PIR motion on the left and it returns BTC, i can trigger PIR motion on the right and it returns ETH prices. Kind of fun to build.

Python Raspberry Pi 上多个 PIR 运动传感器的代码

Python code for multiple PIR motion sensors on Raspberry Pi

python

raspberry-pi3