How to configure in the HMI the new functionality "MQTT broker" in Azure Event Grid?

Question

Hello, I want to use Azure Event Grid as Broker. the MQTT client is an HMI which I can configure as follows:1.png, 2.png, 3.png, 4.png

I have tried to configure the hmi and the Event Grid without being able to establish MQTT communication. any suggestion about it? thank you

Answer 1

1. Azure Event Grid documentation
2. Connect your IoT devices to Azure Event Grid
3. Azure Event Grid troubleshooting guide

Create an Azure Event Grid topic:

• In the Azure portal, navigate to the Event Grid service.
• Click on "Topics" and then "+ Event Grid Topic" to create a new topic.
• Provide a name, select the appropriate subscription and resource group, and choose the region.
• Click on "Create" to create the topic.

Configure Event Grid for MQTT support:

• Once the topic is created, click on the topic name to open its settings.
• In the topic settings, click on "Endpoints" and then "+ Event Subscription" to create a new subscription.
• Provide a name for the subscription.
• In the "Endpoint Type" section, select "Webhook" as the endpoint type.
• In the "Endpoint" field, provide the URL of the MQTT broker you want to connect to. This will depend on your specific setup.
• Configure any additional settings as needed and click on "Create" to create the subscription.

Configure the HMI:

• On your HMI device, open the configuration settings for the MQTT client.
• In the configuration settings, you will typically find options to set the MQTT broker URL, client ID, username, password, and other relevant settings.
• Use the MQTT broker URL you specified in the Azure Event Grid subscription endpoint as the broker URL in the HMI configuration.
• Configure the remaining settings (such as client ID, username, and password) as required by your MQTT broker and HMI device.

Test the MQTT communication:

• Save the configuration settings on the HMI device and ensure that it is connected to the network.
• Publish a test message to the Azure Event Grid topic or simulate an event that should trigger a message to be sent to the MQTT broker.
• Monitor the MQTT broker to see if it receives the messages from the Event Grid topic.

In addition to the above steps, here are a few KB articles that you can refer to for more information and troubleshooting: