Method1.py

import RPi.GPIO as GPIO
import time
GPIO.setmode(GPIO.BOARD)           #define the pin that goes to the circuit
pin_to_circuit = 22
def rc_time (pin_to_circuit):
    count = 0                           #Output on the pin for
    GPIO.setup(pin_to_circuit, GPIO.OUT)
    GPIO.output(pin_to_circuit, GPIO.LOW)
    time.sleep(0.1)                            #Change the pin back to input
    GPIO.setup(pin_to_circuit, GPIO.IN)        #Count until the pin goes high
    while (GPIO.input(pin_to_circuit) == GPIO.LOW):
        count += 1
    return count                                   
#Catch when script is interupted, cleanup correctly
try                                                 
# Main loop
    while True:
    print ( rc_time(pin_to_circuit))
except KeyboardInterrupt:
    pass
finally:
    GPIO.cleanup()