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#!/usr/bin/python3
# -*- coding: utf-8 -*-
# Copyright (c) 2014 Roger Light <roger@atchoo.org>
#
# All rights reserved. This program and the accompanying materials
# are made available under the terms of the Eclipse Distribution License v1.0
# which accompanies this distribution.
#
# The Eclipse Distribution License is available at
# http://www.eclipse.org/org/documents/edl-v10.php.
#
# Contributors:
# Roger Light - initial implementation
# All rights reserved.
# This shows a simple example of an MQTT subscriber using a per-subscription message handler.
import context # Ensures paho is in PYTHONPATH
import paho.mqtt.client as mqtt
def on_message_msgs(mosq, obj, msg):
# This callback will only be called for messages with topics that match
# $SYS/broker/messages/#
print("MESSAGES: " + msg.topic + " " + str(msg.qos) + " " + str(msg.payload))
def on_message_bytes(mosq, obj, msg):
# This callback will only be called for messages with topics that match
# $SYS/broker/bytes/#
print("BYTES: " + msg.topic + " " + str(msg.qos) + " " + str(msg.payload))
def on_message(mosq, obj, msg):
# This callback will be called for messages that we receive that do not
# match any patterns defined in topic specific callbacks, i.e. in this case
# those messages that do not have topics $SYS/broker/messages/# nor
# $SYS/broker/bytes/#
print(msg.topic + " " + str(msg.qos) + " " + str(msg.payload))
mqttc = mqtt.Client(mqtt.CallbackAPIVersion.VERSION2)
# Add message callbacks that will only trigger on a specific subscription match.
mqttc.message_callback_add("$SYS/broker/messages/#", on_message_msgs)
mqttc.message_callback_add("$SYS/broker/bytes/#", on_message_bytes)
mqttc.on_message = on_message
mqttc.connect("mqtt.eclipseprojects.io", 1883, 60)
mqttc.subscribe("$SYS/#", 0)
mqttc.loop_forever()
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