我的项目是从PIR传感器读取数据,当人在传感器前面时播放一首歌,但我无法弄清楚我在网上找到的这段代码背后的逻辑并尝试修改它。
我需要做的是:
编辑:现在它停止但是有办法循环这个过程,有没有办法让脚本内存有效
以下是代码:(已更新)
#!/usr/bin/env python
# -*- coding: utf-8 -*-
#from subprocess import Popen
from omxplayer import OMXPlayer
import RPi.GPIO as GPIO
import time
import subprocess
GPIO.setmode(GPIO.BCM)
PIR_PIN = 7
GPIO.setup(PIR_PIN, GPIO.IN)
song = OMXPlayer('/home/pi/5Seconds.mp3')
try:
print ("Pir Module Test (CTRL+C to exit)")
time.sleep(2)
print("Ready")
active = False
while True:
time.sleep(2)
if GPIO.input(PIR_PIN):
time.sleep(1)
print("Motion detected")
if not active:
active = True
print("Music started")
song.play()
time.sleep(10)
elif active:
print("No motion detected, stop the music")
song.pause()
song.can_control(song)
active = False
if active and song.poll() != None: # detect completion to allow another start
print("Music finished")
active = False
except KeyboardInterrupt:
print ("Quit")
GPIO.cleanup()
答案 0 :(得分:1)
根据原始代码,尝试以下操作,我对脚本的工作方式做了一些小改动:
#!/usr/bin/env python
# -*- coding: utf-8 -*-
from subprocess import Popen
import RPi.GPIO as GPIO
import time
GPIO.setmode(GPIO.BCM)
PIR_PIN = 7
GPIO.setup(PIR_PIN, GPIO.IN)
song_path = '/home/pi/Hillsong.mp3'
try:
print ("Pir Module Test (CTRL+C to exit)")
time.sleep(2)
print("Ready")
active = False
while True:
if GPIO.input(PIR_PIN):
print("Motion detected")
if not active:
active = True
print("Music started")
omxp = Popen(['omxplayer', song_path])
elif active:
print("No motion detected, stop the music")
omxp.terminate()
active = False
if active and omxp.poll() != None: # detect completion to allow another start
print("Music finished")
active = False
time.sleep(5)
except KeyboardInterrupt:
print ("Quit")
GPIO.cleanup()
注意:
while True
意味着永远循环,因此跟随它的time.sleep(10)
永远不会被执行。while False
永远不会执行其中的内容,因此永远不会执行omxp.terminate()
。active
来指示播放器是否正在运行以避免多次启动。我手上没有Pi,所以没有经过测试。