Basic Raspberry Pi water meter pulse counting and MQTT push to Home Assistant

gistfile1.txt

import RPi.GPIO as GPIO
import paho.mqtt.client as mqtt

GPIO.setmode(GPIO.BOARD)

GPIO.setup(3, GPIO.IN, pull_up_down=GPIO.PUD_UP)

global pcount # variable for counted pulses
pcount = 0
count1 = 0

client = mqtt.Client()
client.connect(192.168.1.100, 1883, 60) #IP address of your Home Assistant (HA)
client.loop_start()


def reportstatus(channel):
	# will execute on every rising pulse
        global pcount
        pcount += 1

GPIO.add_event_detect(3, GPIO.RISING, callback=reportstatus, bouncetime=120)

while True:

	# loop updates flow in HA every 3 seconds

	count1 = pcount
	count1 = count1 * 9.6  #convert pulses to ounces
	pcount = 0
		
        sleep(3)  

	# push the flow data to HA using MQTT 
	client.publish(topicname, round(float(count1)/3,0))