Wind Turbine with Azure Digital Twins and Azure Data Explorer

Architecture

• Data flow:

Component:

• Azure IoT Hub - Cloud Device and Security management, for receiving data from device sensor
• Azure Event Grid - Send telemetry to event grid subscription
• Azure Functions - using event grid trigger to read from Event Grid subscription and update accordingly to Azure Digital Twin
• Azure Digital Twins - Store Current data in Twin and Export to Event Hub
• Azure Event Hub - intermediate store to push to Azure Data Explorer
• Azure Data Explorer - historical data storage for further analytics

Set Up:

Reference: https://learn.microsoft.com/en-us/azure/digital-twins/how-to-ingest-iot-hub-data

• Step 1: Set up Azure IoT Hub
  • 1: Create an Azure IoT Hub instance
  • 2: Create a device with a device id
  • 3: Make note of the device connection string and replace in the TurbinetoIoTHub.py
• Step 2: Azure Digital Twins
  • 1: Setup a digital twin instance
  • 2: Using the Windturbine.json model (DTDL language) to describe the properties, relationships, and capabilities of your device.
  • 3: Create a Twin with a matching twin id from the device id in IoT Hub
• Step 3: Set up the device sensor (Python)
  • 1: Install the required Python libraries: pip install azure-iot-device azure-iot-hub
  • 2: Running the TurbinetoIoTHub.py to send the data to Azure IoT Hub
• Step 4: Create Azure Function - C#
  • 1: Using Visual Studio to create a Azure Function project (follow the step in the reference link). Using the IoTHubtoTwins.cs code to paste in the main code file
  • 2: Configure the function app to connect to Azure Digital Twin
• Step 5: Connect the function to IoT Hub
  • 1: Create an event subscription that the IoT Hub will use to send event data to the IoTHubtoTwins function
  • 2: Running both TurbinetoIoTHub.py and Azure Function in the same time.
  • 3: Seeing updated data in Azure Digital Twins Explorer
    • Event Grid:
    • Azure Function:
    • Azure Digital Twins Explorer Updated:

Azure Digital Twins to Azure Data Explorer

Reference: https://learn.microsoft.com/en-us/azure/digital-twins/how-to-create-data-history-connection?tabs=portal

• Step 1: Create an Event Hub namespace and event hub
• Step 2: Create a Kusto (Azure Data Explorer) cluster and database
• Step 3: Set up data history connection between the Azure Digital Twins instance, the event hub, and the Azure Data Explorer cluster.
• Step 4: Verify the data flow
  • 1: Navigate to the event hub and Azure Digital Twins Explorer to ensure it's connected to the right instance.
    • Event Hub :
    • Azure Digital Twins data visualization:
    • Azure Data Explorer Dashboard: