Azure IoT Central Connection String Generator is not working- Kindly provide a solution

Question

The web site : https://gloveboxes.github.io/Turn-a-Command-Line-tool-into-a-REST-API-with-Azure-Functions/dps-cstr.html

does not return for a Device id, scope & device key. Screen is hanging..

Answer 1

Hello @Pinakster,

welcome to this moderated Azure community forum.

I recommend getting in touch with the creator https://github.com/gloveboxes if you have question about this repo.

It is recommended to use the regular way to connect a IoT central devices based on the proper secrets instead of this shortcut.

Behind IoT Central technology like Azure IoT Hub and Azure Device Provisioning Service are used.

You could try it first with an example like this Python example.

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Answer 2

I tried this py code as below to get the connection string which worked.

import os
import asyncio

from dotenv import load_dotenv

from azure.iot.device.aio import IoTHubDeviceClient, ProvisioningDeviceClient

# Load the environment variables
##load_dotenv()

# Get the connection details from the .env file for Azure IoT Central
##ID_SCOPE = os.environ['ID_SCOPE']
##DEVICE_ID = os.environ['DEVICE_ID']
##PRIMARY_KEY = os.environ['PRIMARY_KEY']
ID_SCOPE = "???????????"
DEVICE_ID = "raspberrypi-1"
PRIMARY_KEY = "????????????????????????????"

async def connect_device() -> IoTHubDeviceClient:
    """Connects this device to IoT Central
    """
    # Connect to the device provisioning service and request the connection details
    # for the device
    provisioning_device_client = ProvisioningDeviceClient.create_from_symmetric_key(
        provisioning_host='global.azure-devices-provisioning.net',
        registration_id=DEVICE_ID,
        id_scope=ID_SCOPE,
        symmetric_key=PRIMARY_KEY)
    registration_result = await provisioning_device_client.register()

    # Build the connection string - this is used to connect to IoT Central
    conn_str = 'HostName=' + registration_result.registration_state.assigned_hub + \
                ';DeviceId=' + DEVICE_ID + \
                ';SharedAccessKey=' + PRIMARY_KEY
    print ("Connection string:", conn_str)
    # The device client object is used to interact with Azure IoT Central.
    device_client = IoTHubDeviceClient.create_from_connection_string(conn_str)

    # Connect to the IoT Central hub
    device_client.connect()

    # Return the device client
    return device_client

def main():
    print("IoT Hub - connection string")


    # Instantiate the client. Use the same instance of the client for the duration of
    # your application
    client = asyncio.run(connect_device())

if __name__ == '__main__':
    main()