git.slaskete.net - einar-bin/blob - autolock.py

   1 # Automatically lock the screen when bluetooth beacon moves out of range
   2 # Requires GNOME Shell
   3
   4 from beacontools import BeaconScanner, IBeaconFilter, IBeaconAdvertisement
   5 import time
   6 import signal
   7 import dbus
   8
   9 global isHere, screenSaverSetActive, screenSaverGetActive
  10
  11 def handler(signum, frame):
  12     scanner.stop()
  13     exit(0)
  14
  15 def callback(bt_addr, rssi, packet, additional_info):
  16     global isHere
  17     isHere = True
  18
  19 sessionBus = dbus.SessionBus()
  20 screenSaver = sessionBus.get_object("org.gnome.ScreenSaver", "/org/gnome/ScreenSaver")
  21 screenSaverIface = dbus.Interface(screenSaver, 'org.gnome.ScreenSaver')
  22 screenSaverSetActive = screenSaverIface.get_dbus_method("SetActive")
  23 screenSaverGetActive = screenSaverIface.get_dbus_method("GetActive")
  24
  25 # To find beacon:
  26 # scan for all iBeacon advertisements regardless from which beacon
  27 #scanner = BeaconScanner(callback,
  28 #    packet_filter=IBeaconAdvertisement
  29 #)
  30
  31 signal.signal(signal.SIGINT, handler)
  32
  33 while True:
  34     isHere = False
  35     scanner = BeaconScanner(callback,
  36         device_filter=IBeaconFilter(uuid="INSERT YOUR UUID HERE")
  37     )
  38     scanner.start()
  39     time.sleep(45)
  40     scanner.stop()
  41
  42     if isHere:
  43         print("Beacon is here")
  44     else:
  45         print("Beacon is gone")
  46         if not screenSaverGetActive():
  47             print("Locking screen")
  48             screenSaverSetActive(True)