Little playtime with a Bubble machine and Raspberry Pi - now you see them, now you don't

Tested with Python 2.7.9.

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# Playtime with a Bubble machine #----------------------------------------------------------------------------------- # # The user has a predetermines time to have fun with the Bubble machine # He needs to provide the password. If it is correct, he will be able # to enjoy the bubbles for a limited time, until he is asked for the password again. # # If the password the correct, a green LED lights up and the Bubble machine # starts churning. Before the password is provided or if it is wrong, a red LED # is lit up and no bubbles. # #----------------------------------------------------------------------------------- # Bubble machine is connected to: # ground (GND) # 5V pin # G25 pin # (for more information see: http://blog.web-zazen.co.uk/2014/12/controlling-bubble-machine-with-arduino.html # # LEDs are connected: # long wire through 10kOhme resistor: # green LED: to G18 # red LED : to G20 # short wire to ground (GND) #----------------------------------------------------------------------------------- #----------------------------------------------------------------------------------- import RPi.GPIO as gpio import time # Setup # Rasperry Pi pins #----------------------------------------------------------------------------------- gpio.setmode(gpio.BCM) gpio.setup(18, gpio.OUT) # Green LED gpio.setup(20, gpio.OUT) # Red LED gpio.setup(25, gpio.OUT) # Bubble machine # timeout #----------------------------------------------------------------------------------- playtime = 30 # Playtime length nowtime = time.time() # Starting now stoptime = nowtime + playtime # Playtime !! #----------------------------------------------------------------------------------- while ((stoptime-nowtime) > 0): print "You have %d seconds left" % (stoptime-nowtime) gpio.output(18, gpio.LOW) # Starting with switched off green LED gpio.output(20, gpio.HIGH) # switched on red LED gpio.output(25, gpio.HIGH) # switched off Bubbles password = raw_input("Show you are the privileged one. What is the password? ") # Authentication # successful #--------------------------------------------------------------------------- if password == "bubbles": gpio.output(18, gpio.HIGH) # Green LED on gpio.output(20, gpio.LOW) # Red LED off gpio.output(25, gpio.LOW) # Bubbles blowing! time.sleep(5) # ... for 5 seconds we are happy # failed #--------------------------------------------------------------------------- else: gpio.output(18, gpio.LOW) # Green LED off gpio.output(20, gpio.HIGH) # Red LED on gpio.output(25, gpio.HIGH) # No bubbles print("You failed the test!") nowtime = time.time() # Clean up - switch everything off #----------------------------------------------------------------------------------- print "No time left, buster" gpio.output(18, gpio.LOW) # Ending with switched off green LED gpio.output(20, gpio.LOW) # switched off red LED gpio.output(25, gpio.HIGH) # switched off Bubbles # Close the channels to avoid a message about channels being already in use #----------------------------------------------------------------------------------- gpio.cleanup()