# DoorControlApp

# Example application to detect using a proximity sensor and open, close a door.

#

# Copyright (c) 2014 Charles Weir. Shared under the MIT Licence.

import sys, os # Python path kludge - omit these 2 lines if BrickPython is installed.

sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(sys.argv[0]))))

from BrickPython.TkApplication import TkApplication

from BrickPython.Sensor import Sensor

import logging

class DoorControlApp(TkApplication):

'''Application to automatically open and close a door using a proximity sensor.

It also closes and 'locks' it when C is pressed (so the sensor no longer opens it), starting again when S or O is pressed

The door is attached to a motor, which opens it by moving through 90 degrees, and closes it the same way.

The sensor is mounted above the door, so it detects approaching 'peaple'.

'''

def __init__(self):

TkApplication.__init__(self, {'1': Sensor.ULTRASONIC_CONT })

self.doorLocked = False

self.addSensorCoroutine( self.openDoorWhenSensorDetected() )

def openDoorWhenSensorDetected(self):

'''Coroutine that waits until the sensor detects something nearby, then opens the door, keeps it open for

4 seconds, then closes it again and repeats.

It uses the flag *doorLocked* to determine whether the user has 'locked' the door.

'''

motorA = self.motor('A')

sensor1 = self.sensor('1')

motorA.zeroPosition()

while True:

while sensor1.value() > 8 or self.doorLocked:

yield

logging.info( "Opening - sensor 1 value is %d" % sensor1.value() )

for i in motorA.moveTo( -2*90, 2000 ):

if self.doorLocked: break

yield

logging.info( "Waiting 4 seconds" )

for i in self.waitMilliseconds( 4000 ):

if self.doorLocked: break

yield

logging.info( "Shutting door" )

for i in motorA.moveTo( 0, 2000 ):

yield

logging.info( "Door closed" )

def onKeyPress(self, event):

'Handle key input from the user'

if TkApplication.onKeyPress(self, event):

return

char = event.char

if char in 'Cc':

logging.info( "Closing and disabling door now" )

self.doorLocked = True

elif char in 'SsOo':

logging.info( "Re-activating door" )

self.doorLocked = False

if __name__ == "__main__":

logging.basicConfig(format='%(message)s', level=logging.INFO) # All log messages printed to console.

logging.info( "Starting" )

app = DoorControlApp()

app.mainloop()