Error - Create your first Azure IoT Central app

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Error - Create your first Azure IoT Central app

Abhishek Anand 36

I am trying to implement "RefrigeratorTruck" example on Azure IoT Central.
I have created the Device Template and added the interfaces as per the document and published it and added the devices.
When I am running the Visual Studio + C# source code, I have telemetry value in Raw Data, but in Truck View, it showing "waiting for data".

Nothing is appearing in Device view (Truck view).

Attached is the images of Interface, Raw data and view for reference.

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Answer 1

Matthijs van der Veer 4,376 MVP Volunteer Moderator

In your rawdata.png, all your data is ending up in the Unmodeled data column. This happens because the properties in the JSON are lower-case and the values in the Name field in your device template are upper-case. IoT maps the properties in your message to the capability name in your template and that process is case-sensitive. You will have to create a new template with the correct names and your view will be populated correctly!

Abhishek Anand 36 Reputation points

2020-10-22T08:04:57.82+00:00

Hi
I am using following document.
For Device template creation:
Path: https://learn.microsoft.com/en-us/learn/modules/create-your-first-iot-central-app/2-create-device-template

For Code
Path: https://learn.microsoft.com/en-us/learn/modules/create-your-first-iot-central-app/5-create-real-device-nodejs?pivots=vs-csharp

I did as mentioned in the document. Can you point where is the error in the document.
Matthijs van der Veer 4,376 Reputation points MVP Volunteer Moderator

2020-10-25T11:29:04.473+00:00

I followed the document and I see upper-case values in my JSON.

Can you confirm that you are using the following: using System.Text.Json; Please make certain that you are using this statement and not Newtonsoft. Newtonsoft by default will serialize to lower-case.
Abhishek Anand 36 Reputation points

2020-10-28T15:12:12.28+00:00

Since I am using Newtonsoft, it is creating different json string which is not matching with Device Template Name.

It created the proper json when used System.Text.Json and views and Raw Data for device are loaded properly.

Thank You for feedback and figuring out, what I did wrong.

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