[PYTHON] Improved motion sensor made with Raspberry Pi


Posted last time completed a practical sensor, and after operating it for a while, some points I wanted to improve came out.

  1. The pop-up is not good
  2. I want to make a sound at the same time as the pop-up display
  3. I want to support multiple clients

As for 1., I thought from the beginning that the standard Windows pop-up looks ugly anyway, so I wanted to make it look fashionable and modern.

Regarding 2., the pop-up does not appear when playing a game in full screen, so I experienced it badly unless I noticed it with sound.

  1. I wanted to be able to use either PC because I have multiple PCs in my room.

Pop-up improvement

After consulting with an acquaintance, I think growl is good. I got a suggestion I decided to use it because it can be used on Windows, it can be easily operated from the command line, it looks modern and cool, and it also produces sound. I made it to execute from a batch file by referring to this site

growl setting

First, install growl for windows and pass it through the path. (I noticed after finishing, but I feel that if I write the full path in a batch file, I do not have to pass the path) After that, set the password, appearance, and sound from the growl setting screen and complete (Since it is as per this site, it is omitted)

Batch file creation

Create a batch file to pop up


growlnotify.exe /t:"Emergency!" /s:False /pass:"password"Please evacuate

If you set / s: True, the pop-up will not disappear unless you click it, but it is troublesome if it comes continuously, so I set it to False

When I executed this, a pop-up was displayed, but when I executed the batch file, the command prompt was displayed for a moment. After a lot of research, the method of calling a batch file from vbs seems to be the royal road (I don't really know) So I didn't get it, but I created vbs


Dim oShell
Dim path

Set oShell = WScript.CreateObject ("WSCript.shell")

path = oShell.CurrentDirectory
path = path & "\PopUp.bat"

oShell.run path,0

Set oShell = Nothing

It works as desired, so I decided to execute this vbs from a script.

Script change

The part that displays the pop-up created last time


def popup(): #Send a message on the Windows screen
  user32 = windll.user32
  user32.MessageBoxA( 0, "Enemy Will Come Here!!", "Caution!!", 0x00000030)

Change as below

def growl(): #Run vbs to show growl
  path = os.path.abspath(os.path.dirname(__file__))
  filename = "popup.vbs"
  path = os.path.join(path,filename)
  os.system(path) h

As a whole it became like this


from __future__ import print_function
import socket
import time
import os

from contextlib import closing
from ctypes import *

def main():
  while True:

def recv():
  host = '192.168.1.xx'
  port = 8080
  backlog = 10
  bufsize = 4096
  sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    with closing(sock):
      sock.bind((host, port))
      conn, address = sock.accept() 
      msg = conn.recv(bufsize) 
      if (msg == 'raspberry'):
  except socket.timeout:
  except socket.error:

def growl():
  path = os.path.abspath(os.path.dirname(__file__))
  filename = "popup.vbs"
  path = os.path.join(path,filename)
if __name__ == '__main__':

Completed I was able to realize the fashionable pop-up I was looking for

Supports multiple clients

I examined various methods and listed candidates

  1. Change from TCP to UDP to broadcast
  2. Make the transmission part multi-threaded
  3. Do it well in the cloud

It seems easy to broadcast 1., and I didn't have to write each IP address in the source, so I tried it, but I was frustrated because it didn't work. I'm frustrated, so I want to revenge as soon as I ask someone

Regarding 3., it takes time to review the overall specifications, select the cloud and make a contract, so it is reserved.

I'm reluctant, but in 2., I decided to deal with it for the time being

So, I changed the following


from __future__ import print_function
import socket
import time

import RPi.GPIO as GPIO
GPIO.setup(25, GPIO.IN)

from contextlib import closing
import threading

def main():
  while True:
    inputValue = GPIO.input(25)
    host = ['192.168.1.xx','192.168.1.yy']
    if (inputValue == True):
      for ip in host:
        thread = threading.Thread(target=send, args=(ip,))

def send(host):
  port = 8080
  bufsize = 4096
  sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
  with closing(sock):
      sock.connect((host, port))
      print(host + ' send')
    except socket.timeout:
      print(host + ' socketTimeout')
    except socket.error:
      print(host + ' socketError')

if __name__ == '__main__':



Practical dissatisfaction in my environment has been almost eliminated, and I am living a comfortable life in my room. I just made a weird toy with an impure motive, but when I touched python for the first time, the tension went up and I was quite absorbed in it. I would like to try cloud computing during the winter vacation Also, since it's almost a copy, the contents of the sauce will be terrible, I will not be able to make it unless I make it while examining it a little more, so I would like to devote myself little by little.

If you have any suggestions or guidance, please do not hesitate to contact us.

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