Python script to send Mqtt message when Gpio on Raspberry Pi changes, for example triggered by a motion sensor

pirmqtt_v2.py

#!/usr/bin/python
# Read a Pir-sensor and send a Mqtt message when motion detected
# Uses edge detection to limit the rate of Mqtt-messages
import paho.mqtt.client as paho
import time
import urlparse
import RPi.GPIO as GPIO
import datetime

# Mqtt
mqttc = paho.Client()
url_str = 'mqtt://192.168.1.79:1883'
url = urlparse.urlparse(url_str)
mqttc.username_pw_set("emonpi", "emonpimqtt2016")

# Setup Gpio
GPIO.setwarnings(False)
GPIO.setmode(GPIO.BOARD)
GPIO.setup(13, GPIO.IN)         # Output from PIR motion sensor connected to pin 13

def printtime(): # Used for debug
	# Current time
	global hour, minute, wholetime
	now = datetime.datetime.now()
	hour = str(now.hour)
	minute = int(now.minute)
	minute = '%02d' % minute
	wholetime = hour + ":" + minute

def sendmqtt(mess):
    try:
	mqttc.connect(url.hostname, url.port)
	mqttc.publish("pir/hallway", mess)
	sleep(5)
    except:
	    pass

sendmqtt("Pirmqtt started")

while True:
	try:
		GPIO.wait_for_edge(13, GPIO.RISING)
	 	#printtime()
   		#print "Time now: " + wholetime
		#print("Motion detected")
  		sendmqtt("on")
		time.sleep(5)
		sendmqtt("off")
		time.sleep(5)
	except KeyboardInterrupt:
    		# quit
    		sys.exit()	 	

hi Patrick, first of all thanks for your script
I'm trying to use it but getting the following error:
File "pirmqtt_v2.py", line 32
mqttc.connect(url.hostname, url.port)
^
IndentationError: expected an indented block
I'm not a python guru so if you have time to check much appreciated!
Thanks,
Tom

You have to be careful with indentation with Python.
It has to look like this:

def sendmqtt(mess):
    try:
	mqttc.connect(url.hostname, url.port)

and not like this:

def sendmqtt(mess):
try:
mqttc.connect(url.hostname, url.port)

Thanks! :)

…

On 2021. 08. 12. 14:44, Patrik Hermansson wrote: ***@***.**** commented on this gist. ------------------------------------------------------------------------ You have to be careful with indentation with Python. It has to look like this: |def sendmqtt(mess): try: mqttc.connect(url.hostname, url.port) | and not like this: |def sendmqtt(mess): try: mqttc.connect(url.hostname, url.port) | — You are receiving this because you commented. Reply to this email directly, view it on GitHub <https://gist.github.com/3fd1ce0fa41bfc4ca2600d5cf4b41504#gistcomment-3858098>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AMC6CGISZJSB3AQE7HCGWSTT4O64LANCNFSM5B7OPTAQ>. Triage notifications on the go with GitHub Mobile for iOS <https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675> or Android <https://play.google.com/store/apps/details?id=com.github.android&utm_campaign=notification-email>.