Raspberry pi home security monitor
Iteration 1 - basic functionality

This is first, simplest iteration of the project that has following features:

• motion sensor to detect motion and trigger the camera
• camera takes a picture and picture is stored locally with a timestamp as the name of the file
• the picture is then emailed to the house owner

import RPi.GPIO as GPIO
import time
import os
import datetime
from smtplib import SMTP_SSL as SMTP
import sys
from email.mime.text import MIMEText
from email.mime.application import MIMEApplication
from email.mime.multipart import MIMEMultipart
from os.path import basename
from email.utils import COMMASPACE, formatdate

sensor = 4

GPIO.setmode(GPIO.BCM)
GPIO.setup(sensor, GPIO.IN, GPIO.PUD_DOWN)

previous_state = False
current_state = False

def send_email(f):
    send_from='[email protected]'
    send_to='[email protected]'
    subject='motion notice'
    text='see attached'

    msg = MIMEMultipart(
        From=send_from,
        To=COMMASPACE.join(send_to),
        Date=formatdate(localtime=True),
        Subject=subject
    )
    msg.attach(MIMEText(text))

    with open(f, "rb") as fil:
        msg.attach(MIMEApplication(
            fil.read(),
                Content_Disposition='attachment; filename="%s"' % basename(f),
                Name=basename(f)
            ))
    try:
        conn = SMTP('smtp.mail.yahoo.com')
        conn.set_debuglevel(False)
        conn.login('[email protected]', 'password_here')
        try:
            conn.sendmail(send_from, send_to, msg.as_string())
        finally:
            conn.close()

    except Exception as exc:
        sys.exit("email failed: {}".format(exc))

def take_photo():
    now = datetime.datetime.now()
    os.system("raspistill -w 640 -h 480 -n -t 100 -q 10 -e jpg -th none -o 'pictures/" + now.isoformat() +".jpg'")
    send_email('pictures/' + now.isoformat() +'.jpg')
while True:
    time.sleep(0.01)
    previous_state = current_state
    current_state = GPIO.input(sensor)
 
    if current_state != previous_state:
        new_state = "HIGH" if current_state else "LOW"
        print("GPIO pin %s is %s" % (sensor, new_state))
        if new_state=="HIGH":
            take_photo()