我想使用Python MQTT连接到Azure Iot Hub。
Iot Hub需要用户名和SAS令牌。这是我的代码:
import paho.mqtt.client as mqtt
def on_connect(client, userdata, flags, rc):
print("Connected with result code "+str(rc))
client.subscribe("$SYS/#")
def on_message(client, userdata, msg):
print(msg.topic+" "+str(msg.payload))
client = mqtt.Client()
client.on_connect = on_connect
client.on_message = on_message
client.username_pw_set("myHub.azure-devices.net/device1", "mySASToken")
client.connect("myHub.azure-devices.net", 1883, 60)
client.loop_forever()
但是在运行一段时间后,抛出了这个异常:
TimeoutError:[WinError 10060]连接尝试失败,因为连接方在一段时间后没有正确响应,或者由于连接主机无法响应而建立连接失败
有人知道为什么我无法连接到Iot Hub吗?
答案 0 :(得分:3)
现在有一个官方的Python SDK可以将设备连接到Azure IoT Hub: https://github.com/Azure/azure-iot-sdks/tree/master/python/device
This sample演示了如何使用MQTT协议进行连接。
基本上,这是它的工作原理:
from iothub_client import *
def send_confirmation_callback(message, result, userContext):
print "Confirmation[%d] received for message with result = %s" % (userContext, result)
def receive_message_callback(message, counter):
buffer = message.get_bytearray()
size = len(buffer)
print "Received Message"
print " Data: <<<%s>>> & Size=%d" % (buffer[:size], size)
return IoTHubMessageDispositionResult.ACCEPTED
iotHubClient = IoTHubClient(connectionString, IoTHubTransportProvider.MQTT)
iotHubClient.set_message_callback(receive_message_callback, 0)
iotHubClient.send_event_async(message, send_confirmation_callback, 0)
答案 1 :(得分:2)
正如@FarukCelik所说,没有适用于Python的Azure IoT SDK。
但是,根据我的经验,我认为在Python中使用现有的SDK for IoTHub有四种可行的方法。
Paho
支持MQTT,因此我认为您可以尝试引用Azure NodeJS IoT SDK on GitHub的源代码来了解如何正确使用{ {3}}用于Azure IoTHub。与此同时,GitHub上有一个用于Azure IoTHub设备的非官方Python库paho Python client。您可以关注这个项目存储库,但它现在还处于开发阶段。
希望它有所帮助。最诚挚的问候。
答案 2 :(得分:0)
以下是如何使用paho(mosquitto)通过标准MQTT连接到Azure IoT Hub:
from paho.mqtt import client as mqtt
def on_connect(client, userdata, flags, rc):
print "Connected with result code: %s" % rc
client.subscribe("devices/<YOUR DEVICE ID>/messages/devicebound/#")
def on_disconnect(client, userdata, rc):
print "Disconnected with result code: %s" % rc
def on_message(client, userdata, msg):
print " - ".join((msg.topic, str(msg.payload)))
# Do this only if you want to send a reply message every time you receive one
client.publish("devices/<YOUR DEVICE ID>/messages/events", "REPLY", qos=1)
def on_publish(client, userdata, mid):
print "Sent message"
client = mqtt.Client(cleint_id=<YOUR DEVICE ID>, protocol=mqtt.MQTTv311)
client.on_connect = on_connect
client.on_disconnect = on_disconnect
client.on_message = on_message
client.on_publish = on_publish
client.username_pw_set(username="<YOUR NAMESPACE>.azure-devices.net/<YOUR DEVICE ID>",
password="<YOUR SHARED ACCESS SIGNATURE FOR THE DEVICE>")
client.tls_insecure_set(True) # You can also set the proper certificate using client.tls_set()
client.connect("<YOUR NAMESPACE>.azure-devices.net", port=8883)
client.loop_forever()
答案 3 :(得分:-1)
参考https://azure.microsoft.com/en-gb/documentation/articles/iot-hub-sdks-summary/ Azure IoT SDK不包含Pyhon&#34;但是&#34;。这已由https://feedback.azure.com/forums/321918-azure-iot中的其他客户提出。 (直接链接:https://feedback.azure.com/forums/321918-azure-iot/suggestions/10522101-add-python-client-sdk)。