1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
|
#!/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
# Copyright (c) 2014 Roger Light <roger@atchoo.org>
# All rights reserved.
# This demonstrates the session present flag when connecting.
import context # Ensures paho is in PYTHONPATH
import paho.mqtt.client as mqtt
def on_connect(mqttc, obj, flags, reason_code, properties):
if obj == 0:
print("First connection:")
elif obj == 1:
print("Second connection:")
elif obj == 2:
print("Third connection (with clean session=True):")
print(" Session present: " + str(flags.session_present))
print(" Connection result: " + str(reason_code))
mqttc.disconnect()
def on_disconnect(mqttc, obj, flags, reason_code, properties):
mqttc.user_data_set(obj + 1)
if obj == 0:
mqttc.reconnect()
def on_log(mqttc, obj, level, string):
print(string)
mqttc = mqtt.Client(mqtt.CallbackAPIVersion.VERSION2, client_id="asdfj", clean_session=False)
mqttc.on_connect = on_connect
mqttc.on_disconnect = on_disconnect
# Uncomment to enable debug messages
# mqttc.on_log = on_log
mqttc.user_data_set(0)
mqttc.connect("mqtt.eclipseprojects.io", 1883, 60)
mqttc.loop_forever()
# Clear session
mqttc = mqtt.Client(mqtt.CallbackAPIVersion.VERSION2, client_id="asdfj", clean_session=True)
mqttc.on_connect = on_connect
mqttc.user_data_set(2)
mqttc.connect("mqtt.eclipseprojects.io", 1883, 60)
mqttc.loop_forever()
|
