IOT Hub connection string - Azure Digital Twin

Question

I am doing some POC on Azure Digital Twin. So i am using some DT samples available on GitHub by azure. But those samples require IOT Hub connection string to enter. But i am not able to find the IOT hub connection string any where in Azure Digital Twin.

for example, see this following line:

IoT Hub connection string has to be set to system environment variable IOT_HUB_CONNECTION_STRING

How can i get this connection string, i can have device connection string but i can not have iot hub connection string.

I know Azure DT has its underline IOT Hub and currently developers can not access it. I want to ask is there any way we can get that ?

It's for the device connection string not for IOT hub itself — Saad Zulfiqar
Do you have a link to the sample you're trying to use? Currently, there is no way to access the IoT Hub as you would normally. — Matthijs van der Veer
@MatthijsvanderVeer Please see github.com/Azure-Samples/azure-iot-samples-node/blob/master/…, line # 18 — Saad Zulfiqar

Matthijs van der Veer Matthijs van der Veer · Accepted Answer · 2020-01-28T11:03:42

The Node sample you're using (as you stated in the comments) is actually an IoT Plug and Play sample. If I run the sample against a North European IoT Hub (they are PnP enabled) I get the PnP digital twin of a device:

{
  "interfaces": {
    "urn_azureiot_ModelDiscovery_DigitalTwin": {
      "name": "urn_azureiot_ModelDiscovery_DigitalTwin",
      "properties": {
        "modelInformation": {
          "reported": {
            "value": {
              "interfaces": {
                "urn_azureiot_ModelDiscovery_DigitalTwin": "urn:azureiot:ModelDiscovery:DigitalTwin:1"
              }
            }
          }
        }
      }
    }
  },
  "version": 1
}

The git comments also suggest this is a Plug and Play sample:

IOT Hub connection string - Azure Digital Twin

2 Answers