def trigger_alarm():
"""Sends alarm signal (either e-mail or siren)"""
# Alarm delay then check again
time.sleep(alarm_delay)
# Check again if someone is home now
if Device.objects.filter(is_home=True).count() > 0:
return # cancel alarm
l = Log(log_type='AL')
l.save()
try:
Config.objects.get(config_type='ALARM', name='email', enabled=True)
for c in Config.objects.filter(config_type='EMAIL', enabled=True):
send_mail(
'Doorguard ALARM',
'Alarm Triggered!!!',
settings.DEFAULT_FROM_EMAIL,
[c.name],
fail_silently=True
)
except ObjectDoesNotExist:
pass # email sending disabled
try:
Config.objects.get(config_type='ALARM', name='sound', enabled=True)
# do some crazy shitty sound action!!!
GPIO.output(alarm_pin, 0) # start alarm...
# just for some seconds to timestamp
time.sleep(alarm_time)
GPIO.output(alarm_pin, 1) # disable alarm
except ObjectDoesNotExist:
pass # sound action disabled
def check_devices():
"""Checks which devices are at home"""
while not stop_threads.isSet():
devices = Device.objects.all() # get all current devices
for d in devices:
for i in range(int(ping_retry)):
ret = subprocess.call("ping -c 1 %s" % d.ip,
shell=True,
stdout=open('/dev/null', 'w'),
stderr=subprocess.STDOUT)
if ret == 0:
break # break retries, if device is alive
time.sleep(1)
is_home = (ret == 0)
if not d.is_home == is_home:
d.is_home = is_home
d.save()
l = Log(device=d, status=is_home, log_type='DE', text='(checker)')
l.save()
time.sleep(device_check_wait)
def check_motion():
"""Checks motions in the room with IR-detector"""
GPIO.setup(motion_pin, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)
while not stop_threads.isSet():
curr_state = GPIO.input(motion_pin)
if curr_state:
l = Log(status=curr_state, log_type='MO')
l.save()
# could trigger also alarm here if no phone is present
# if curr_state == 0 and Device.objects.filter(is_home=True).count() == 0:
# Door opened and nobody at home!
# alarm_thread = threading.Thread(target=trigger_alarm)
# alarm_thread.daemon = True
# alarm_thread.start()
# Device.objects.filter(is_home=True).order_by('-modified')
time.sleep(motion_check_wait)
def dhcp_pipe_reader():
"""Checks for new DHCP-registration of devices"""
if not os.path.exists(pipe_name):
os.mkfifo(pipe_name)
while not stop_threads.isSet():
with open(pipe_name, 'r') as pipe:
line = pipe.readline()[:-1] # get line except \n at end
line = line.split(' ') # split up by ' ' in chunks
cmd = line[0]
if cmd == 'old' or cmd == 'add':
mac = line[1]
ip = line[2]
hostname = line[3]
try:
d = Device.objects.get(ip=ip, is_home=False)
d.is_home = True
d.save()
l = Log(device=d, status=True, log_type='DE', text='(dhcp)')
l.save()
except ObjectDoesNotExist:
pass
def check_door():
"""Checks the door-state with magnetic switch"""
GPIO.setup(check_pin, GPIO.IN)
old_state = GPIO.input(check_pin)
while not stop_threads.isSet():
curr_state = GPIO.input(check_pin)
if old_state != curr_state:
# state of pin changed
old_state = curr_state
l = Log(status=curr_state, log_type='DO')
l.save()
if curr_state == 0 and Device.objects.filter(is_home=True).count() == 0:
# Door opened and nobody at home!
alarm_thread = threading.Thread(target=trigger_alarm)
alarm_thread.daemon = True
alarm_thread.start()
if curr_state == 0:
try:
c = Config.objects.get(config_type='ALARM', name='siren_test', enabled=True)
c.save()
GPIO.output(alarm_pin, 0) # start alarm...
# just for some seconds to timestamp
if c.value:
time.sleep(float(c.value))
else:
time.sleep(alarm_time)
GPIO.output(alarm_pin, 1) # disable alarm
c.enabled=False
c.save()
except ObjectDoesNotExist:
pass # do nothing
# Device.objects.filter(is_home=True).order_by('-modified')
time.sleep(door_check_wait)
