iot-hub | IoT Hub for Garden Aid | 3D Printing library

I am using Hono for a while, it is a pretty awesome IoT-Hub - thanks for a great job :) Now I am trying to get forward and as it is recommended by the Hono documentation, I would like to integrate the EnMasse Project and replace the default "AMQP Messaging Network in hono with the EnMasse.

After reading the EnMasse-Doc I realized that actually also EnMasse uses the same "AMQP Networking" structure as Hono by means of Qpid Dispatch router and (Multiple) ActiveMQ Artemis!

Now my Questions are:

• What is actually the difference between the default AMQP-Messaging Network in Hono and the EnMasse?
• I searched a lot on the Net but found no answer on how to integrate EnMasse in Hono. I am grateful for any Idea where to start!

Thanks in advance!

I want to regularly update the desired properties for IoT Device. The desired properties that I am sending is as follows:

IoT Hub publishes the events "DeviceConnected" and "DeviceDisconnected" via Event Grid according to the documentation.

My question is, which action from an actual IoT Device triggers these events?

For the "DeviceConnected" event:

• Is it triggered when the OpenAsync Method is called on the Client SDK?
• Is it triggered implicitly when the SendEvent Method is called?
• Is this event also available via direct AMQP/MQTT connections?
• For how long will it stay in this state?

For the "DeviceDisconnected" event:

• Is the device going to "disconnected" as soon as "Close" on the DeviceClient is called?
• What if connectivity is not good? Is there a constant ping along with a timeout mechanism which marks a device as offline after it was idle for a given time?

We currently have implemented the heartbeat pattern as described here but we are wondering if there is an easier and eventually more cost-efficient way to achieve the same goal.

I have tried to receive cloud to device message through IOT Hub using the steps mentioned in the link below: https://docs.microsoft.com/en-us/azure/iot-hub/iot-hub-csharp-csharp-c2d

I have attached the code that I am using and the result I am getting.

In the simulated device app, I am calling this method "ReceiveMessageAsync()".

I have updated the screenshot of the output that I am getting. After entering the "Enter", I am not getting any output. After decoding the code, I could see that in the ReceiveMessageAsync() method, I am getting receivedMessage == null.

Please help me with this code and suggest the changes that I should make to make it work perfectly.

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I have found many examples on how to retrieve data from a running IoT hub. However, in all of these, some variant of WebSockets is required.

• AMQP
• The JavaScript Client SDK, with this sample in a web app
• There is even a REST API, but it's only for managing devices and sending data.

I need a way to immediately get the latest message available from an IoT device.

I am running a small weather station using 4 devices, which send their data to the IoT hub. As a display, I want to recycle a 1st generation iPad. It's browser does not support WebSockets, thus ruling out all the modern approaches.

I will update the values with polling, preferably using simple HTTP GET requests, every 15 minutes.

I have the above mentioned sample running (qrysweathertest.azurewebsites.net), but it uses web sockets, thus not working on a 1stGen iPad.

A customer ran a scan on an IoTEdge (v1.0.9.1) device and discovered that non-recommended versions of TLS protocol are enabled by default.

• TLS Version 1.0 Protocol (TCP/5671), Severity: High
• TLS Version 1.1 Protocol (TCP/5671), Severity: Medium

Is there a way to configure IOT Edge (by default) to

• Disable usage of TLS 1.0 / 1.1
• Only use TLS 1.2 for inbound / outbound communications?
• Disable the iot-edge gateway functionality (‘standard iot edge’ device scenario)

I saw below links but wanted to know if there are other options to provide to the customer

Control TLS version and ciphers exposed by IoT Edge Hub
https://github.com/Azure/iotedge/tree/master/edge-modules/edgehub-proxy

TLS 1.2 enforcement available in select regions Azure IoT Hub TLS support | Microsoft Docs
https://docs.microsoft.com/en-us/azure/iot-hub/iot-hub-tls-support

I want to change a "desired" property of an Device Twin in Iot-Hub.

I want the element name of the property to be an integer value, e.g.:

There is some confusion between two aspects of Azure IoT-Hub. I see here that Azure Digital Twins (with DTDL) simplify device state management (reported, desired properties) when compared to Azure IoT-Hub Device Twins. However, I see here that they appear to be separate but linkable entities.

So the question: Can Azure Digital Twins (and DTDL) be seen/used as REPLACEMENTS for Azure IoT-Hub Device Twins. How? If not, why not, since having two separate Twins appears overly complex?

Note that we use the IoT-Edge and leverage its offline features of reported and desired properties in the Iot-Hub Device Twins.

Thanks!

I am currently learning about Azure IOT Plug and Play and Digital Twins.

I am running the following Device Sample: Azure\IOT Plug and Play\azure-iot-samples-csharp\iot-hub\Samples\device\PnpDeviceSamples\Thermostat

and the corresponding Service Example: Azure\IOT Plug and Play\azure-iot-samples-csharp\iot-hub\Samples\service\PnpServiceSamples\Thermostat

To interact with the Thermostat: https://github.com/Azure/opendigitaltwins-dtdl/blob/master/DTDL/v2/samples/Thermostat.json

I would like to discover what Properties, Telemetry and Commands are available for a device/twin through an API/SDK based on the twin ID, However I notice that the Microsoft.Azure.Devices.Device and Microsoft.Azure.Devices.Shared.Twin classes only contain Property information and don't define Commands or Telemetry.