You can connect to IoT Hub with mobile app directly

Function app is not necessary in the project. The current data flow in the project is:

```
Mobile App --[HTTP]--> Azure Function App --[HTTP (packaged in IoT Hub SDK)]--> IoT Hub --[MQTT]--> DevKit
```

You can remove Azure Function App from the project, and connect to IoT Hub directly:

```
Mobile App --[HTTP (Rest API)]--> IoT Hub --[MQTT]--> DevKit
```

Learn more about IoT Hub Rest API from .

You can also debug IoT Hub Rest API from .

The official example [DevKit State](https://github.com/IoTDevEnvExamples/DevKitState) uses Azure Function as a proxy of IoT Hub Rest API server, because IoT Hub Rest API doesn't support CORS which is required in browser.