Iam試圖爲我的樹莓派製作一個簡單的應用程序,它會向IOThub發送消息,然後嘗試接收響應,但沒有任何事情發生。物聯網集線器沒有收到或發送消息
我從設備控制器複製了連接字符串。我把這個問題隱藏起來了。
我看到它打印出消息已成功發送給iothub,但是當我檢查iothub時,我看到0收到的消息。
使用iothub的免費層的Iam是這個限制嗎?
public sealed partial class MainPage : Page
{
private const string DeviceConnectionString = "Hidden";
private readonly DeviceClient _deviceClient;
public MainPage()
{
this.InitializeComponent();
_deviceClient = DeviceClient.CreateFromConnectionString(DeviceConnectionString, TransportType.Amqp); //Already tried using different transport types but no succes.
}
public async Task SendEvent()
{
Debug.WriteLine("\t{0}> Sending message", DateTime.Now.ToLocalTime());
var commandMessage = new Message(Encoding.ASCII.GetBytes("Cloud to device message."));
await _deviceClient.SendEventAsync(commandMessage);
Debug.WriteLine("Succesfully sended message to IotHub");
}
public async Task ReceiveCommands()
{
Debug.WriteLine("\nDevice waiting for commands from IoTHub...\n");
while (true)
{
var receivedMessage = await _deviceClient.ReceiveAsync();
if (receivedMessage != null)
{
var messageData = Encoding.ASCII.GetString(receivedMessage.GetBytes());
Debug.WriteLine("\t{0}> Received message: {1}", DateTime.Now.ToLocalTime(), messageData);
var propCount = 0;
foreach (var prop in receivedMessage.Properties)
{
Debug.WriteLine("\t\tProperty[{0}> Key={1} : Value={2}", propCount++, prop.Key, prop.Value);
}
await _deviceClient.CompleteAsync(receivedMessage);
Debug.WriteLine("Finishing recieving message");
}
await Task.Delay(TimeSpan.FromSeconds(1));
}
}
private async void Button_Click(object sender, Windows.UI.Xaml.RoutedEventArgs e)
{
Debug.WriteLine("Sending event");
await SendEvent();
await ReceiveCommands();
Debug.WriteLine("Received commands");
}
}
您能看到您在[Device Explorer]中發送的D2C消息嗎(https://github.com/Azure/azure-iot-sdk-csharp/tree/master/tools/DeviceExplorer#run-the-sample-應用)? –
是iam得到這個:接收事件... 2017-04-10 20:08:53>設備:[RaspberryPI],數據:[雲到設備消息。] – Barsonax
那麼,你是什麼意思「我檢查iothub我看到0個收到的消息。「?你的意思是你使用'ReceiveCommands()'來接收這些D2C消息? –