Morcup Rasp Code

#!/usr/local/bin/python

import RPi.GPIO as GPIO
import time

__author__ = 'Gus (Adapted from Adafruit)'
__license__ = "GPL"
__maintainer__ = "pimylifeup.com"

GPIO.setmode(GPIO.BOARD)

#define the pin that goes to the circuit
pin_to_circuit = 7


def rc_time (pin):

    #Output on the pin for
    GPIO.setup(pin_to_circuit, GPIO.OUT)
    GPIO.output(pin_to_circuit, GPIO.LOW)
    time.sleep(.1)

    #Change the pin back to input
    GPIO.setup(pin_to_circuit, GPIO.IN)



    compare = [0,0]        # The list "compare" will store successive values of count, with the most recent value in the first entry.
    bigCount = 0          # Initialize a variable "bigCount" which will be used to detect whether we have obtained the first two values of count needed to do our first comparison.
    count = 0
    differenceThreshold = 1500 # IMPORTANT: Put whatever value you need for the difference to be for the trigger condition here.


    # The outer WHILE loop will run until the following three conditions have been met:
    #
    #     (1) The second entry of "compare" has a nonzero value (i.e. we have obtained at least one count).
    #    (2) The first entry of "compare" has a nonzero value (i.e. we have obtained at least two counts).
    #    (3) The previous two conditions are met, and the difference between the last two values of count is at least "differenceThreshold."
    while abs(compare[0] - compare[1]) < differenceThreshold or (compare[0] == 0 or compare[1] == 0):
            #Output on the pin for
        GPIO.setup(pin_to_circuit, GPIO.OUT)
        GPIO.output(pin_to_circuit, GPIO.LOW)
        time.sleep(.1)

        #Change the pin back to input
        GPIO.setup(pin_to_circuit, GPIO.IN)
        if bigCount == 0:    # If bigCount is not at least 2, then we haven't obtained at least two values of count to compare yet.
            count = 0    # Reset the variable "count" to 0.
            while (GPIO.input(pin_to_circuit) == GPIO.LOW):        # Obtain a value of "count.
                count += 1
            compare[0] = count     # Assign the (1 - bigCount)^th entry of compare to the value of "count" obtained by the preceding while loop.
            bigCount = 1    # Set bigCount to 1.

        elif bigCount == 1:   # If bigCount is equal to 2, then "compare" has two nonzero entries, and we can begin comparing consecutive values of "count."
            count = 0        # Reset count to 0.
            compare[1] = compare[0]     # Since the outer WHILE loop was not triggered, we need to sample a new value of count; hence we need to send the first entry of "compare" to the second in preparation for assigning a new value to the first entry.
            while (GPIO.input(pin_to_circuit) == GPIO.LOW):     # Generate a new value of count.
                count += 1
            compare[0] = count         # Assign the new value of count to the first entry of compare.

    # Since we have exited the outer WHILE loop above, our two values of count were sufficiently far apart. Return the last value of count computed.
    return compare[0]

while True:
    print (rc_time(pin_to_circuit))
    GPIO.setup(16, GPIO.OUT)
    GPIO.setup(22, GPIO.OUT)
    GPIO.output(16, True)
    time.sleep(0.5)
    GPIO.output(22, True)
    time.sleep(0.5)
    GPIO.output(22, False)
    GPIO.output(16, False)
    time.sleep(1)   #this is to make 1 second before can fire again


except KeyboardInterrupt:
    print("Goodbye")
    quit()


except Exception as e:   # is this the right place to put the exception raising?
    print(e)
    raise e
finally:
    GPIO.cleanup()