FlowSensorTest

flowsensortest.py

#!/usr/bin/python
# Originally From: https://www.raspberrypi.org/forums/viewtopic.php?t=118230

import RPi.GPIO as GPIO
import time, sys
import datetime

FLOW_SENSOR = 17

GPIO.setmode(GPIO.BCM)
GPIO.setup(FLOW_SENSOR, GPIO.IN, pull_up_down = GPIO.PUD_UP)

global count
count = 0

def countPulse(channel):
   global count
   count = count + 1

GPIO.add_event_detect(FLOW_SENSOR, GPIO.FALLING, callback=countPulse)

start_time = datetime.datetime.now()

while True:
    try:
        time = datetime.datetime.now()

        if ((time-start_time).seconds > 5):
            start_time = datetime.datetime.now()
            print("Total Count: %d" % count)

    except KeyboardInterrupt:
        print('\ncaught keyboard interrupt!, bye')
        GPIO.cleanup()
        sys.exit()