Is it enough to specify "TransportType.Mqtt"(C#) to communicate with Azure IoT Hub by MQTT?

Question

I'm writing an application in c #. I am using the Azure-Iot-SDK to specify "TransportType.Mqtt" to send to Azure IoT Hub via mqtt.
When executed, DeviceExploler also confirmed the sent data.

However, although I monitored the packet data sent by the application side (using "WireShark"), I could not monitor the MQTT packet.

When I monitored the transmission from another MQTT communication application to another MQTT broker, I was able to monitor the MQTT packets.

Is it enough to set "TransportType.Mqtt" for MQTT communication using Azure-Iot-SDK?

Answer 1

Hello @ima Welcome to Microsoft Q&A Platform and thanks for your query.

I too had the same experience with WireShark while capturing the MQTT packets on my Desktop application.

I hope the below information may help with your initial query.

I have used the Sample C# application, Download the Azure IoT C# samples from https://github.com/Azure-Samples/azure-iot-samples-csharp/archive/master.zip and extract the ZIP archive. Use the Send simulated telemetry section.

After changing the Wireshark Protocol settings, I was able to see the packet captured with MQTT protocol.

Below the screen grab show that I changed the Wireshark protocol settings to listen on port 8883.

• Wireshark---> Edit--->Protocols-->Scroll to MQTT---> Enter the port number **8883 in the textbox 'MQTT TCP port'**

Captured Packet.

Please comment below if you need further help in this matter.