Azure IoT中心云到设备的消息(MQTT，自定义主题) [英] Azure IoT HUB. cloud-to-device messages (MQTT, custom topics)

问题描述

我有一个Azure IoT中心.在这里，我创建了一个自定义设备.该设备已成功与Azure IoT中心连接.我还可以从该设备(从设备到-cloud)接收数据.

该设备使用"MQTT协议".我无法在此设备中更改订阅主题和发布主题，因此我必须能够设置此"customtopics"在Azure(功能应用程序)中.

公共静态异步void运行(EventData myIoTHubMessage，TraceWriter日志) { log.Info($" {myIoTHubMessage.SystemProperties ["iothub-connection-device-id"]}")； var deviceId = myIoTHubMessage.SystemProperties ["iothub-connection-device-id"].ToString(); var msg = JsonConvert.SerializeObject("{\" Values \:{\"从站8.Channel 1.Output \:false，"); var c2dmsg =新的Microsoft.Azure.Devices.Message(Encoding.ASCII.GetBytes(msg)); 等待client.SendAsync(deviceId，c2dmsg); }

解决方案

https://stackoverflow .com/questions/52112397/azure-iot-hub-cloud-to-device-messages-mqtt-custom-topics

谢谢！

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Azure IoT HUB. cloud-to-device messages (MQTT, custom topic)

I have an Azure IoT Hub. Here I created a custom device. This device is connected successfully with the Azure IoT Hub. I can also receive the data from this device (device-to -cloud).

But I also want to send a message to this device.

This device uses the "MQTT protocol". I cannot change the subscribe topic and the publish topic in this device, so I have to be able to set this "customtopics" in Azure (Function App).

For this, I have created a function App (IoT Hub (Event Hub)), but I do not know how to implement the "publish and/or subscribe topic" here. All examples are about "messages/events".

run.csx

public static async void Run(EventData myIoTHubMessage, TraceWriter log)
{
    log.Info($"{myIoTHubMessage.SystemProperties["iothub-connection-device-id"]}");
    var deviceId = myIoTHubMessage.SystemProperties["iothub-connection-device-id"].ToString();
    var msg = JsonConvert.SerializeObject("{\"Values\": {\"Slave 8.Channel 1.Output\": false,");
    var c2dmsg = new Microsoft.Azure.Devices.Message(Encoding.ASCII.GetBytes(msg));

    await client.SendAsync(deviceId, c2dmsg);
}

解决方案

E75 thank you for your feedback!

I see that the same question was asked on Stack Overflow, and an answer already provided. Let's point this to the SO Thread. If you have further questions let us know?

Answered: https://stackoverflow.com/questions/52112397/azure-iot-hub-cloud-to-device-messages-mqtt-custom-topics

Thank you!

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