README.md

Visualize Azure IoT Hub data on a local web app

This is a tweaked sample project from Visualize real-time sensor data from your Azure IoT hub in a web application

Run locally

1. To pass parameters to the website, you may use environment variables or parameters.

   • Open a command prompt or PowerShell terminal and set the environment variables IotHubConnectionString and EventHubConsumerGroup.

     Syntax for Windows command prompt is set key=value, PowerShell is $env:key="value", and Linux shell is export key="value".

   • Or, if you are debugging with VS Code, you can edit the launch.json file and add these values in the env property.

     "env": {
         "NODE_ENV": "local",
         "IotHubConnectionString": "IOT_HUB_CONNECTION_STRING",
         "EventHubConsumerGroup": "EVENT_HUB_CONSUMER_GROUP"
     }

2. In the same directory as package.json, run npm install to download and install referenced packages.

3. Run the website one of the following ways:

   • From the command-line (with environment variables set), use npm start
   • In VS Code, press F5 to start debugging

4. Watch for console output from the website.

5. If you are debugging, you may set breakpoints in any of the server-side scripts and step through the code to watch the code work.

6. Open a browser to http://localhost:3000.