需要指导更好的覆盆子pi approch

Question

我想使用运行windows iot核心的覆盆子pi模型b远程切换继电器，Rasberry pi必须连接azure iot集线器，最初我可以通过互联网浏览器访问ui来打开/关闭继电器，

更好的方法（c＃，windows iot核心上的node.js），链接到相关文章将不胜感激。

Answer 1

要使用Azure IoT Hub，您可以使用direct method。

• 设备端：

对于Windows IoT Core，您可以从UWP应用开始。

以下是在设备上实现直接方法的简单示例：

using Microsoft.Azure.Devices.Client;
using System.Diagnostics;
using System.Text;
using System.Threading.Tasks;
using Windows.UI.Xaml.Controls;


namespace App1
{
    public sealed partial class MainPage : Page
    {
        private string connectionStr = "HostName=[YOUR HUB NAME].azure-devices.net;DeviceId=[YOUR DEVICE ID];SharedAccessKey=[SHARED ACCESS KEY]";
        private DeviceClient deviceClient;

        public MainPage()
        {
            this.InitializeComponent();
            AddDirectMethod();
        }

        private async void AddDirectMethod()
        {
            deviceClient = DeviceClient.CreateFromConnectionString(connectionStr, TransportType.Mqtt);
            await deviceClient.SetMethodHandlerAsync("TurnOn", new MethodCallback(TurnOnRelay), null);
            await deviceClient.SetMethodHandlerAsync("TurnOff", new MethodCallback(TurnOffRelay), null);
        }

        private Task<MethodResponse> TurnOffRelay(MethodRequest methodRequest, object userContext)
        {
            Debug.WriteLine("Direct method name:" + methodRequest.Name);

            // Put Relay toggle code here.
            // ...

            string result = "{\"Relay Status\":\"The Relay is OFF.\"}";
            return Task.FromResult(new MethodResponse(Encoding.UTF8.GetBytes(result), 200));
        }

        private Task<MethodResponse> TurnOnRelay(MethodRequest methodRequest, object userContext)
        {
            Debug.WriteLine("Direct method name:" + methodRequest.Name);

            // Put Relay toggle code here.
            // ...

            string result = "{\"Relay Status\":\"The Relay is ON.\"}";
            return Task.FromResult(new MethodResponse(Encoding.UTF8.GetBytes(result), 200));
        }
    }
}

您需要在您的UWP应用中安装 NuGet 包 microsoft.azure.devices.client 。 Here是您可以参考的.NET控制台应用程序的详细教程。

• 云端：

您可以像这样从Azure门户调用直接方法：