How to show latest value without refresh

Question

Hi everyone,

I wanted to show telemetry data from IoT device in web application.

I managed to send data from IoT hub to Cosmos DB. How can I refresh data without refreshing page?

I tried connecting web app directly to IoT hub, but it failed, only if I create new application it works. 

I also tried stream analytics, but data which IoT device is sending is string, so stream analytics gives me error whil trying to understand what the message is. I tried json, csv and avro.

So, how can I show real time data? Data is sent from device every minute.

Regards,

Yerkhan

Answer 1

Hi Yerkhan,

What is the error message you are getting?

You may check the documentation Visualize real-time sensor data from your Azure IoT hub by using the Web Apps feature of Azure App Service and see if it helps.

Answer 2

Hello,

I've tried using this method, but got errors when setting preferences for apps: both IoT hub and Web app. I tried to repeat these steps in newly created app and it worked. So, I can't recreate application and use it.

Now I am able to send data to Cosmos DB and get values from it in array. Collection in cosmos db is populated with new element every minute. I got an idea to call data from collection every minute without refreshing page. Is it possible?

Regards,

Yerkhan

Answer 3

Hi Yerkhan,

Since this not working with your web app, to check what went wrong here, I suggest you contact technical support for deeper analysis of the issue. Refer How to create an Azure support request. If you don’t have a support plan, please send an email to [e-mail] with the below details to investigate this further.

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