Device twins are JSON documents that store device state information including metadata, configurations, and conditions. Azure IoT Hub maintains a device twin for each device that you connect to IoT Hub.

    Azure Side

    Device Twins setup:


    • Sign in to the Azure IoT.
    • On the Azure homepage, select your created IoT Hub. 
    • In the Left side Device Management section Choose ‘Devices’.
    • Select your created Device ID.

    • Select the Device twin option to update the device information.
    • In the properties, update the desired JSON document with LED and
      COLOR information as shown in the image.
    • And Save it.

    Try it out

    esp32 Azure IoT platform

    1. esp idf baremetal
    2. arduino esp32

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    You may also schedule a demo here.