Azure-iot-sdk-csharp: MQTT - OpenAsync error.

[pandazzurro]

Hi, I have a simple UWP project.
I want to use direct methods.
I connect my device but when call "_client.OpenAsync().Wait();" return this error.

Nuget package: Microsoft.Azure.Devices.Client version 1.3.0.

CODE:

Task.Run(async () =>
{
_client = DeviceClient.CreateFromConnectionString(
                   "HostName=myname.azure-devices.net;SharedAccessKeyName=iothubowner;SharedAccessKey=..=",
                   "mydeviceId",
                   TransportType.Mqtt);
                _client.OpenAsync().Wait();
}).Wait();

ERROR:

The parameter is incorrect. remoteServiceName

STACK TRACE:

   at Windows.Networking.Sockets.DatagramSocket.GetEndpointPairsAsync(HostName remoteHostName, String remoteServiceName)
   at Microsoft.Azure.Devices.Client.Transport.Mqtt.MqttTransportHandler.<OpenAsync>d__62.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.Azure.Devices.Client.Transport.Mqtt.MqttTransportHandler.<OpenAsync>d__45.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.Azure.Devices.Client.Transport.ProtocolRoutingDelegatingHandler.<TryOpenPrioritizedTransportsAsync>d__3.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at Microsoft.Azure.Devices.Client.Transport.ProtocolRoutingDelegatingHandler.<TryOpenPrioritizedTransportsAsync>d__3.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.Azure.Devices.Client.Transport.ProtocolRoutingDelegatingHandler.<OpenAsync>d__2.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.Azure.Devices.Client.Transport.ErrorDelegatingHandler.<>c__DisplayClass19_0.<<ExecuteWithErrorHandlingAsync>b__0>d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.Azure.Devices.Client.Transport.ErrorDelegatingHandler.<ExecuteWithErrorHandlingAsync>d__20`1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at Microsoft.Azure.Devices.Client.Transport.ErrorDelegatingHandler.<ExecuteWithErrorHandlingAsync>d__20`1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.Azure.Devices.Client.Transport.ErrorDelegatingHandler.<OpenAsync>d__4.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.Azure.Devices.Client.TaskHelpers.<WithTimeout>d__15.MoveNext()

I tried to change connectionString with device read connectionString.
I tried to change IoTHub resource.

Thanks
Andrea

[mepprec]

Hi

In your Connection String, you have the sharedaccesskeyname parameter.
This is not needed, and is not a valid parameter, as you are not connecting as the iothub owner, but rather as the device.

Possible are:
"HostName=;SharedAccessKey="
"HostName=;DeviceId=;SharedAccessKey="

[pandazzurro]

I try same code on x86 UWP and work.
I can not understand.

I must try code on ARM UWP.

[pandazzurro]

Working code on UWP (x86) not work on UWP (ARM). Device is raspberry.
I replicate error on new project with 3 lines of code. You can see in image below.
Line 39 throw error.

[asergaz]

Hello @pandazzurro , the latest Nuget package is 1.3.1. Can you try again using the latest version? Also can you let me know the version of Windows 10 IoT Core that your are using?

Thank you.

[pandazzurro]

Same error with latest Nuget package (1.3.1).

Windows IoTCore version: 10.0.10586.0
Raspberry PI 2

[Premier]

Same error for me.
I'm using Device.Client Nuget package 1.3.1
Windows UWP version: 10.0.15063
On arch x86/x64

[andreatosato]

Are you sure? X86 work for me.
My problem is ARM and raspberry.

In April 2017 same code work but not now

[pandazzurro]

Sorry, @andreatosato and @pandazzurro are same user.
I have 2 github account

[asergaz]

Hello @pandazzurro and @Premier , I couldn't reproduce the issue on x86 UWP app. Can you let me know how you are defining the Method callback? It should be something like this inside public MainPage():

Task<MethodResponse> WriteToDebug(MethodRequest methodRequest, object userContext)
{
       Debug.WriteLine("Method Was called");
       return Task.FromResult(new MethodResponse(new byte[0], 200));
}

Thank you

[andreatosato]

Hi @sergaz-msft.
My problem is on ARM/raspberry.
As already mentioned above, x86 work for me.

[asergaz]

Hello @andreatosato . I just tested the UWP app on an ARM/raspberry 3 device using Windows 10 IoT core Insider Preview v.10.0.16237.1001 and it is working fine. Can you do the same test on that OS version? Is the issue still on the "_client.OpenAsync().Wait();" ?

Thanks

[pandazzurro]

Works!
Thanks

[asergaz]

Hello @pandazzurro I am glad you made it working. Can you just confirm on what OS version you test it? Thanks

[andreatosato]

Windows 10 IoT core Insider Preview v.10.0.16237.1001