Receive Data from Azure IoT Hub with an SAS Key
You can establish an inbound connection to Azure IoT Hub, which allows Belden Horizon Data Operations to receive messages from Azure with SSL using an SAS key.
Before You Begin
You must first Set up an Azure IoT Hub.
Step 1: Add a Device
Follow the steps to Connect a Device. The device will be used to store tags that will be eventually used to create outbound topics in the connector. Make sure to select the Enable Data Store check box.
Step 2: Add Tags
After connecting the device in Belden Horizon Data Operations, you can Add Tags to the device. Create tags that you want to use to create outbound topics for the connector.
Step 3: Add the Connector in Belden Horizon Data Operations
Follow the steps to Add a Connector and select the MQTT - Azure IoT Hub using SAS Key provider.
Configure the following parameters.
- Name: A recognizable name to identify the connector.
- Hostname: The IP address or server FQDN of the MQTT broker (must be reachable from your edge device).
- Port: The MQTT broker's port number. The default value is 8883.
- Device ID: Copy the Device ID of your edge device from the IoT Devices page in the Azure portal and paste it here.
- SAS Key: Copy the primary or secondary shared access key from the IoT Devices page in the Azure portal and paste it here.
- Parallel Publish Count: The maximum number of concurrently published messages. The default value is 16.
- Integration Topic: The default topic to publish or subscribe to: devices/[deviceId]/messages/events/. Replace [deviceId] with the Device ID copied from Azure.
- Token TTL: The token expiry time in minutes. The default value is 1440.
- LWT Topic: The topic for MQTT's Last Will and Testament feature.
- LWT payload: The payload for MQTT's Last Will and Testament feature.
- LWT payload type: The payload type for MQTT's Last Will and Testament feature. The options are string and base64.
- LWT QoS: The Quality of Service value for MQTT's Last Will and Testament feature.
- LWT retained: Select this check box to retain the value for MQTT's Last Will and Testament feature.
- Throttling Limit: The maximum number of messages per second to be processed. The default value is zero, which means that there is no limit.
- Persistent storage: When enabled, this will cause messages to undergo a store-and-forward procedure. Messages will be stored within Belden Horizon Data Operations when cloud providers are online.
Step 4: Create Topics for Azure Connector
You will now need to create topics from the tags you added in Step 2.
Before creating the topics copy the Raw Topic parameter for all tags you want to use for topics. See Manage Tags for more information.
To create topics:
- Click the connector tile. The connector Dashboard appears.
- Click the Topics tab.
- Add topics to the connector with the details below. See the Add a Topic to a Connector section in Manage Connectors for more information.
- Data Direction: Select Remote to Local - Inbound.
- Local Data Topic: Paste the Raw Topic for the tag created in Step 2.
- Remote Data Topic: Replace devices/[Device ID]/messages/events/ with devices/[Device ID]/messages/devicebound/%24.to=%2Fdevices%2Fmessages%2Fdevicebound.Replace [Device ID] with the Device ID parameter configured for the connector.
- Enable: Click the toggle to enable the topic.
- Click Yes to add the topic.
- After adding all required topics, navigate to the Integration pane.
From the connector tile, click the toggle to enable the connector.
Connection toggle
Step 5: Initiate and View Inbound Messages
You will need to create a flow to view the inbound messages from the connector.
To initiate and view inbound messages:
- DataHub Subscribe:
- Debug
- Connect the two nodes.
- Double-click the DataHub Subscribe node. The Edit DataHub Subscribe node dialog box appears.
- Paste the local topic you created in Step 4.
- If needed, configure the Datahub Subscribe connection. See the "Step 3: Configure Connector Nodes" section in Create a Flow to learn more.
- Click Done, and then click Deploy.
- Log in to Azure.
- Open the device pane and click Message to Device. The Message to device pane appears.
- Enter Test Message in the Message Body field and click Send Message.
- Open the flow you created in Belden Horizon Data Operations and check the Debug messages tab. See the Additional Options section in Manage the Flow Canvas for more details.
- Verify that Test Message appears in the debug results.