I'm trying to receive data from Azure IoT Hub to my Unity app. I'm facing issues about URI.
First the global picture is a raspberry pi sending temperature data to Azure IoT Hub (thanks to Azure Devices IoT Hub Python SDK). My Unity, thanks to the Azure Event Hub.NET SDK connect to the Event hub endpoint of my Azure IoT Hub to receive the temperature data.
I modified the c#-sample code provided by Azure to make it works with Unity. But when I play the app, I've got an error message "Invalid Uri".
Error message : UriFormatException: Invalid URI: The URI scheme is not valid. System.Uri.CreateThis (System.String uri, System.Boolean dontEscape, System.UriKind uriKind) (at :0) System.Uri..ctor (System.String uriString) (at :0) deviceToCloud+d__6.MoveNext () (at Assets/Scripts/deviceToCloud.cs:89) Rethrow as AggregateException: One or more errors occurred. System.Threading.Tasks.Task.ThrowIfExceptional (System.Boolean includeTaskCanceledExceptions) (at <1f0c1ef1ad524c38bbc5536809c46b48>:0) System.Threading.Tasks.Task.Wait (System.Int32 millisecondsTimeout, System.Threading.CancellationToken cancellationToken) (at <1f0c1ef1ad524c38bbc5536809c46b48>:0) System.Threading.Tasks.Task.Wait () (at <1f0c1ef1ad524c38bbc5536809c46b48>:0) deviceToCloud.Start () (at Assets/Scripts/deviceToCloud.cs:121)
Has someone an idea about this error and how to fix it? It is about the endpoint?
Thanks for helping!
Here is the code.
public class deviceToCloud : MonoBehaviour
{
// Event Hub-compatible endpoint
private readonly static string s_eventHubsCompatibleEndpoint = "Endpoint=sb://xxx.servicebus.windows.net/;SharedAccessKeyName=xxx;SharedAccessKey=xxx;EntityPath=xxx";
// Event Hub-compatible name
private readonly static string s_eventHubsCompatiblePath = "xxx";
// Keys
private readonly static string s_iotHubSasKey = "xxx";
private readonly static string s_iotHubSasKeyName = "xxx";
private static EventHubClient s_eventHubClient;
// Asynchronously create a PartitionReceiver for a partition and then start
// reading any messages sent from the simulated client.
private static async Task ReceiveMessagesFromDeviceAsync(string partition, CancellationToken ct)
{
// Create the receiver using the default consumer group.
// For the purposes of this sample, read only messages sent since
// the time the receiver is created. Typically, you don't want to skip any messages.
var eventHubReceiver = s_eventHubClient.CreateReceiver("$Default", partition, EventPosition.FromEnqueuedTime(DateTime.Now));
while (true)
{
if (ct.IsCancellationRequested) break;
// Check for EventData - this methods times out if there is nothing to retrieve.
var events = await eventHubReceiver.ReceiveAsync(100);
// If there is data in the batch, process it.
if (events == null) continue;
foreach (EventData eventData in events)
{
string data = Encoding.UTF8.GetString(eventData.Body.Array);
Debug.Log("Message received: " + data);
}
}
}
//private static async Task Main(string[] args)
public async Task ReadD2C()
{
Debug.Log("Fonction principale ReadD2C");
// Create an EventHubClient instance to connect to the
// IoT Hub Event Hubs-compatible endpoint.
var connectionString = new EventHubsConnectionStringBuilder(new Uri(s_eventHubsCompatibleEndpoint), s_eventHubsCompatiblePath, s_iotHubSasKeyName, s_iotHubSasKey);
s_eventHubClient = EventHubClient.CreateFromConnectionString(connectionString.ToString());
// Create a PartitionReciever for each partition on the hub.
var runtimeInfo = await s_eventHubClient.GetRuntimeInformationAsync();
var d2cPartitions = runtimeInfo.PartitionIds;
CancellationTokenSource cts = new CancellationTokenSource();
Console.CancelKeyPress += (s, e) =>
{
e.Cancel = true;
cts.Cancel();
Debug.Log("Exit");
};
var tasks = new List<Task>();
foreach (string partition in d2cPartitions)
{
tasks.Add(ReceiveMessagesFromDeviceAsync(partition, cts.Token));
}
// Wait for all the PartitionReceivers to finsih.
Task.WaitAll(tasks.ToArray());
}
private void Start()
{
Debug.Log("Start");
ReadD2C().Wait();
}
}
