forked from Azure/azure-iot-sdks
-
Notifications
You must be signed in to change notification settings - Fork 0
/
iothub_client_sample_class.py
executable file
·234 lines (188 loc) · 8.42 KB
/
iothub_client_sample_class.py
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
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
#!/usr/bin/env python
# Copyright (c) Microsoft. All rights reserved.
# Licensed under the MIT license. See LICENSE file in the project root for
# full license information.
import random
import time
import sys
import iothub_client
from iothub_client import *
from iothub_client_args import *
# HTTP options
# Because it can poll "after 9 seconds" polls will happen effectively
# at ~10 seconds.
# Note that for scalabilty, the default value of minimumPollingTime
# is 25 minutes. For more information, see:
# https://azure.microsoft.com/documentation/articles/iot-hub-devguide/#messaging
timeout = 241000
minimum_polling_time = 9
# messageTimeout - the maximum time in milliseconds until a message times out.
# The timeout period starts at IoTHubClient.send_event_async.
# By default, messages do not expire.
message_timeout = 10000
receive_context = 0
avg_wind_speed = 10.0
message_count = 5
received_count = 0
twin_context = 0
method_context = 0
# global counters
receive_callbacks = 0
send_callbacks = 0
blob_callbacks = 0
twin_callbacks = 0
send_reported_state_callbacks = 0
method_callbacks = 0
# String containing Hostname, Device Id & Device Key in the format:
# "HostName=<host_name>;DeviceId=<device_id>;SharedAccessKey=<device_key>"
connection_string = "[device connection string]"
msg_txt = "{\"deviceId\": \"myPythonDevice\",\"windSpeed\": %.2f}"
class HubManager(object):
def __init__(
self,
connection_string,
protocol=IoTHubTransportProvider.MQTT):
self.client_protocol = protocol
self.client = IoTHubClient(connection_string, protocol)
if protocol == IoTHubTransportProvider.HTTP:
self.client.set_option("timeout", timeout)
self.client.set_option("MinimumPollingTime", minimum_polling_time)
# set the time until a message times out
self.client.set_option("messageTimeout", message_timeout)
# some embedded platforms need certificate information
# self.set_certificates()
self.client.set_message_callback(self._receive_message_callback, receive_context)
self.client.set_device_twin_callback(self._device_twin_callback, twin_context)
self.client.set_device_method_callback(self._device_method_callback, method_context)
def set_certificates(self):
from iothub_client_cert import certificates
try:
self.client.set_option("TrustedCerts", certificates)
print("set_option TrustedCerts successful")
except IoTHubClientError as e:
print("set_option TrustedCerts failed (%s)" % e)
def _receive_message_callback(self, message, counter):
global receive_callbacks
buffer = message.get_bytearray()
size = len(buffer)
print("Received Message [%d]:" % counter)
print(" Data: <<<%s>>> & Size=%d" %
(buffer[:size].decode('utf-8'), size))
map_properties = message.properties()
key_value_pair = map_properties.get_internals()
print(" Properties: %s" % key_value_pair)
counter += 1
receive_callbacks += 1
print(" Total calls received: %d" % receive_callbacks)
return IoTHubMessageDispositionResult.ACCEPTED
def _send_confirmation_callback(self, message, result, user_context):
global send_callbacks
print(
"Confirmation[%d] received for message with result = %s" %
(user_context, result))
map_properties = message.properties()
key_value_pair = map_properties.get_internals()
print(" Properties: %s" % key_value_pair)
send_callbacks += 1
print(" Total calls confirmed: %d" % send_callbacks)
def _device_twin_callback(updateState, payLoad, user_context):
global twin_callbacks
print(
"\nTwin callback called with:\nupdateStatus = %s\npayload = %s\ncontext = %s" %
(updateState, payLoad, user_context))
twin_callbacks += 1
print("Total calls confirmed: %d\n" % twin_callbacks)
def _send_reported_state_callback(status_code, user_context):
global send_reported_state_callbacks
print(
"Confirmation for reported state received with:\nstatus_code = [%d]\ncontext = %s" %
(status_code, user_context))
send_reported_state_callbacks += 1
print(" Total calls confirmed: %d" % send_reported_state_callbacks)
def _device_method_callback(method_name, payload, user_context):
global method_callbacks
print(
"\nMethod callback called with:\nmethodName = %s\npayload = %s\ncontext = %s" %
(method_name, payload, user_context))
method_callbacks += 1
print("Total calls confirmed: %d\n" % method_callbacks)
deviceMethodReturnValue = DeviceMethodReturnValue()
deviceMethodReturnValue.response = "{ \"Response\": \"This is the response from the device\" }"
deviceMethodReturnValue.status = 200
return deviceMethodReturnValue
def _blob_upload_confirmation_callback(self, result, user_context):
global blob_callbacks
print("Blob upload confirmation[%d] received for message with result = %s" % (user_context, result))
blob_callbacks += 1
print(" Total calls confirmed: %d" % blob_callbacks)
def send_event(self, event, properties, send_context):
if not isinstance(event, IoTHubMessage):
event = IoTHubMessage(bytearray(event, 'utf8'))
if len(properties) > 0:
prop_map = event.properties()
for key in properties:
prop_map.add_or_update(key, properties[key])
self.client.send_event_async(
event, self._send_confirmation_callback, send_context)
def send_reported_state(self, reportedState, size, user_context):
self.client.send_reported_state(
reportedState, size
self._send_reported_state_callback, user_context)
def upload_to_blob(self, destinationfilename, source, size, usercontext):
self.client.upload_blob_async(
destinationfilename, source, size,
self._blob_upload_confirmation_callback, usercontext)
def main(connection_string, protocol):
try:
print("\nPython %s\n" % sys.version)
print(
"IoT Hub for Python SDK Version: %s\n" %
iothub_client.__version__)
hub_manager = HubManager(connection_string, protocol)
print(
"Starting the IoT Hub Python sample using protocol %s..." %
hub_manager.client_protocol)
filename= "hello_python_blob.txt"
content = "Hello World from Python Blob APi"
hub_manager.upload_to_blob(filename, content, len(content), 1001)
reportedState = "{\"newState\":\"standBy\"}"
hub_manager.send_reported_state(reportedState, len(reportedState), 1002)
while True:
# send a few messages every minute
print("IoTHubClient sending %d messages" % message_count)
for i in range(0, message_count):
msg_txt_formatted = msg_txt % (
avg_wind_speed + (random.random() * 4 + 2))
msg_properties = {
"Property": "PropMsg_%d" % i
}
hub_manager.send_event(msg_txt_formatted, msg_properties, i)
print(
"IoTHubClient.send_event_async accepted message [%d]"
" for transmission to IoT Hub." %
i)
# Wait for Commands or exit
print("IoTHubClient waiting for commands, press Ctrl-C to exit")
n = 0
while n < 6:
status = hub_manager.client.get_send_status()
print("Send status: %s" % status)
time.sleep(10)
n += 1
except IoTHubError as e:
print("Unexpected error %s from IoTHub" % e)
return
except KeyboardInterrupt:
print("IoTHubClient sample stopped")
def usage():
print("Usage: iothub_client_sample_class.py -p <protocol> -c <connectionstring>")
print(" protocol : <amqp, http, mqtt>")
print(" connectionstring: <HostName=<host_name>;DeviceId=<device_id>;SharedAccessKey=<device_key>>")
if __name__ == '__main__':
try:
(connection_string, protocol) = get_iothub_opt(sys.argv[1:], connection_string)
except OptionError as o:
print(o)
usage()
sys.exit(1)
main(connection_string, protocol)