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与Azure Iot Hub的Python MQTT连接

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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()

但运行一段时间后，抛出此异常：

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 Build 的连接失败，因为连接的主机无法响应

有人知道为什么我无法连接到Iot Hub吗？

python azure mqtt azure-iot-hub

4 回答

  • 0

    现在有一个官方的Python SDK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：

    • 创建设备客户端并为协议指定MQTT

    • 设置收到消息时将调用的回调

    • 使用send_event_async将消息发送到Azure IoT Hub实例 .

    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)
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  • 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 .

    同时，在GitHub https://github.com/bechynsky/AzureIoTDeviceClientPY上有一个用于Azure IoTHub设备的非官方Python库 . 您可以关注这个项目存储库，但它现在还处于开发阶段 .

    希望能帮助到你 . 最好的祝福 .

    回复于
  • -1

    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()
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  • 3
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