Visualize real-time sensor data from Azure IoT Hub using Power BI

End-to-end diagram

Note

Before you start this tutorial, complete the Raspberry Pi online simulator tutorial or one of the device tutorials; for example, Raspberry Pi with node.js. In these articles, you set up your Azure IoT device and IoT hub, and you deploy a sample application to run on your device. The application sends collected sensor data to your IoT hub.

What you learn

You learn how to visualize real-time sensor data that your Azure IoT hub receives by using Power BI. If you want to try to visualize the data in your IoT hub with a web app, see Use a web app to visualize real-time sensor data from Azure IoT Hub.

What you do

  • Get your IoT hub ready for data access by adding a consumer group.

  • Create, configure, and run a Stream Analytics job for data transfer from your IoT hub to your Power BI account.

  • Create and publish a Power BI report to visualize the data.

What you need

Add a consumer group to your IoT hub

Consumer groups provide independent views into the event stream that enable apps and Azure services to independently consume data from the same Event Hub endpoint. In this section, you add a consumer group to your IoT hub's built-in endpoint that is used later in this tutorial to pull data from the endpoint.

To add a consumer group to your IoT hub, follow these steps:

  1. In the Azure portal, open your IoT hub.

  2. On the left pane, select Built-in endpoints, select Events on the right pane, and enter a name under Consumer groups. Select Save.

    Create a consumer group in your IoT hub

Create, configure, and run a Stream Analytics job

Let's start by creating a Stream Analytics job. After you create the job, you define the inputs, outputs, and the query used to retrieve the data.

Create a Stream Analytics job

  1. In the Azure portal, select Create a resource > Internet of Things > Stream Analytics job.

  2. Enter the following information for the job.

    Job name: The name of the job. The name must be globally unique.

    Resource group: Use the same resource group that your IoT hub uses.

    Location: Use the same location as your resource group.

    Create a Stream Analytics job in Azure

  3. Select Create.

Add an input to the Stream Analytics job

  1. Open the Stream Analytics job.

  2. Under Job Topology, select Inputs.

  3. In the Inputs pane, select Add stream input, then select IoT Hub from the drop-down list. On the new input pane, enter the following information:

    Input alias: Enter a unique alias for the input.

    Provide IoT Hub from your subscription: Select this radio button.

    Subscription: Select the Azure subscription you're using for this tutorial.

    IoT Hub: Select the IoT Hub you're using for this tutorial.

    Endpoint: Select Messaging.

    Shared access policy name: Select the name of the shared access policy you want the Stream Analytics job to use for your IoT hub. For this tutorial, you can select service. The service policy is created by default on new IoT hubs and grants permission to send and receive on cloud-side endpoints exposed by the IoT hub. To learn more, see Access control and permissions.

    Shared access policy key: This field is auto-filled based on your selection for the shared access policy name.

    Consumer group: Select the consumer group you created previously.

    Leave all other fields at their defaults.

    Add an input to a Stream Analytics job in Azure

  4. Select Save.

Add an output to the Stream Analytics job

  1. Under Job Topology, select Outputs.

  2. In the Outputs pane, select Add and Power BI.

  3. On the Power BI - New output pane, select Authorize and follow the prompts to sign in to your Power BI account.

  4. After you've signed in to Power BI, enter the following information:

    Output alias: A unique alias for the output.

    Group Workspace: Select your target group workspace.

    Dataset Name: Enter a dataset name.

    Table Name: Enter a table name.

    Add an output to a Stream Analytics job in Azure

  5. Select Save.

Configure the query of the Stream Analytics job

  1. Under Job Topology, select Query.

  2. Replace [YourInputAlias] with the input alias of the job.

  3. Replace [YourOutputAlias] with the output alias of the job.

    Add a query to a Stream Analytics job in Azure

  4. Select Save.

Run the Stream Analytics job

In the Stream Analytics job, select Overview, then select Start > Now > Start. Once the job successfully starts, the job status changes from Stopped to Running.

Run a Stream Analytics job in Azure

Create and publish a Power BI report to visualize the data

  1. Ensure the sample application is running on your device. If not, you can refer to the tutorials under Setup your device.

  2. Sign in to your Power BI account.

  3. Select the workspace you used, My Workspace.

  4. Select Datasets.

    You should see the dataset that you specified when you created the output for the Stream Analytics job.

  5. For the dataset you created, select Add Report (the first icon to the right of the dataset name).

    Create a Microsoft Power BI report

  6. Create a line chart to show real-time temperature over time.

    1. On the Visualizations pane of the report creation page, select the line chart icon to add a line chart.

    2. On the Fields pane, expand the table that you specified when you created the output for the Stream Analytics job.

    3. Drag EventEnqueuedUtcTime to Axis on the Visualizations pane.

    4. Drag temperature to Values.

      A line chart is created. The x-axis displays date and time in the UTC time zone. The y-axis displays temperature from the sensor.

      Add a line chart for temperature to a Microsoft Power BI report

  7. Create another line chart to show real-time humidity over time. To do this, follow the same steps above and place EventEnqueuedUtcTime on the x-axis and humidity on the y-axis.

    Add a line chart for humidity to a Microsoft Power BI report

  8. Select Save to save the report.

  9. Select Reports on the left pane, and then select the report that you just created.

  10. Select File > Publish to web.

  11. Select Create embed code, and then select Publish.

You're provided the report link that you can share with anyone for report access and a code snippet that you can use to integrate the report into your blog or website.

Publish a Microsoft Power BI report

Microsoft also offers the Power BI mobile apps for viewing and interacting with your Power BI dashboards and reports on your mobile device.

Next steps

You’ve successfully used Power BI to visualize real-time sensor data from your Azure IoT hub.

For another way to visualize data from Azure IoT Hub, see Use a web app to visualize real-time sensor data from Azure IoT Hub.

To continue to get started with Azure IoT Hub and to explore all extended IoT scenarios, see the following: