Consumer groups are used by applications to pull data from Azure IoT Hub. In this lesson, you create a consumer group to be used by a coming Azure service to read data from your IoT hub.
To add a consumer group to your IoT hub, follow these steps:
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In the Azure portal, open your IoT hub.
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Click Endpoints on the left pane, select Events on the middle pane, enter a name under Consumer groups on the right pane, and then click Save.