import RPi.GPIO as GPIO
import datetime
import time
import logging
import os

GPIO.setmode(GPIO.BCM)     # set up BCM GPIO numbering
GPIO.setwarnings(False)
GPIO.setup(27, GPIO.IN)    # Read output from IR sensor

# Logging
logger = logging.getLogger('watermeter')
hdlr = logging.FileHandler('/var/log/watermeter.log')
formatter = logging.Formatter('%(asctime)s %(levelname)s %(message)s')
hdlr.setFormatter(formatter)
logger.addHandler(hdlr)
logger.setLevel(logging.INFO)

sensorstate = 0

# Define a threaded callback function to run in another thread when events are detected
def my_callback(channel):
    global sensorstate
    if GPIO.input(27):     # if port 27 == 1
        #ts =  datetime.datetime.now()
        #print ts," Sensor detected on 27, sensorstate:", sensorstate
        if sensorstate == 1:
           sensorstate = 0
        else:
           sensorstate = 1
           logger.info("1 liter")

           # Update domoticz with new counter
           os.system('curl -s "http://127.0.0.1:8080/json.htm?type=command&param=udevice&idx=19&svalue=1"  > /dev/null')

# when a changing edge is detected on port 25, regardless of whatever
# else is happening in the program, the function my_callback will be run
GPIO.add_event_detect(27, GPIO.BOTH, callback=my_callback, bouncetime=200)

while True:
        time.sleep(2)