106 lines
2.8 KiB
Python
106 lines
2.8 KiB
Python
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import RPi.GPIO as GPIO #This program must be executed as root.
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from subprocess import check_output
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from re import search
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import csv
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import datetime
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import threading
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from time import sleep
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#Define file name here!
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fileName = '/home/pi/Desktop/db.csv'
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#Define timeout here!
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#timeoutSecs = 5 * 60 #5 minutes
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timeoutSecs = 5
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#Define number of alarm seconds here!
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cycles = 5
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def readIWList():
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storage = []
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#now = datetime.datetime.strptime(str(datetime.datetime.utcnow()), "%Y-%m-%d %H:%M:%S.%f")
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now = datetime.datetime.utcnow()
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output = check_output("iwlist wlan0 scan |egrep ' - Address: '", shell=True) #Dependency: IWList
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for i in output.splitlines(True):
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arrayElement = search('([0-9A-F]{2}([:-]|$)){6}', i).group() #RegExp to obtain the MAC Address
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storage.append([arrayElement, now, 0]) #Dirty bit defaults to clean
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return storage
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def writeFile(storage, file):
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with open (file, 'wb') as db:
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dbfile = csv.writer(db, delimiter='\t', quotechar='"')
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for j in storage:
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dbfile.writerow(j);
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def readFile(file):
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storage = []
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with open(file, 'rb') as db:
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dbfile = csv.reader(db, delimiter='\t', quotechar='"')
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for dbrow in dbfile:
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then = datetime.datetime.strptime(dbrow[1], "%Y-%m-%d %H:%M:%S.%f") #Date reconversion
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storage.append([dbrow[0], then, dbrow[2]])
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return storage
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def compareTime(time):
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now = datetime.datetime.utcnow()
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#Timeout is defined, in seconds, at the beginning of the file.
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timeout = datetime.timedelta(seconds = timeoutSecs)
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val = 0
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if ( abs(now - time) > timeout ):
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#print "Timeout: " + str(abs(now - time))
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return 1
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return val
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def buttonPressed():
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#print "Button pressed."
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storage = readIWList()
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file = readFile(fileName)
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for x in file:
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for y in storage:
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if x[0] == y[0]:
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file.remove(x)
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#print "Removed " + x[0] + " from the list."
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for y in storage:
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file.append(y)
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writeFile(file, fileName)
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def cyclicProcess():
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file = readFile(fileName)
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for x in file:
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if int(x[2]) == 0:
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if compareTime(x[1]) == 1:
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x[2] = 1 #Mark dirty bit, timeout achieved
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#print "Timeout achieved for " + str(x[0])
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isAlarmTriggered = False
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storage = readIWList()
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for x in file:
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for y in storage:
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if x[0] == y[0]:
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if x[2] == 1:
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isAlarmTriggered = True
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file.remove(x)
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#print "Removed " + x[0] + " from the list."
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if isAlarmTriggered:
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buzzAlarm()
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#print "Alarm activated!"
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writeFile(file, fileName)
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threading.Timer(timeoutSecs, cyclicProcess,()).start()
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def buzzAlarm():
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for n in xrange(0, cycles):
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GPIO.output(18, 1)
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sleep(0.5)
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GPIO.output(18, 0)
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sleep(0.5)
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#def main():
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GPIO.setmode(GPIO.BCM)
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GPIO.setup(24, GPIO.IN)
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GPIO.setup(18, GPIO.OUT)
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threading.Timer(timeoutSecs, cyclicProcess,()).start()
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try:
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while True:
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sleep(0.1)
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if GPIO.input(24):
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buttonPressed()
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except:
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GPIO.cleanup() #Resets the GPIO ports.
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