Create IOT Device and send Telemetry Message to IOT Device using c#

Prerequisits

Visual studio 2019

Microsoft azure account

IOT Hub

Following are the steps

1. Open visual studio
2. Create new project for .net core console application
   
   
   
   
   
   
   
3. Click next you will get the following screen
   
   
   
   
   
   
   
4. Provide the Project Name and Location and click on Create.
5. From the nugget package install the following packages.
   
   
   
   
   
   
   
6. In the Program.cs class do the following code
   
   
      using Microsoft.Azure.Devices;

   using Microsoft.Azure.Devices.Client;

   using Microsoft.Azure.Devices.Common.Exceptions;

   using Newtonsoft.Json;

   using System;

   using System.Text;

   using System.Threading.Tasks;

   using Message = Microsoft.Azure.Devices.Client.Message;

    

   namespace IOTDevice

   {

       class Program

       {

           static RegistryManager registryManager;

           static string connectionString = "{iot hub connection string}";

           static string DeviceConnectionString = "HostName=<yourIotHubName>.azure-devices.net;DeviceId=<yourIotDeviceName>;SharedAccessKey=<yourIotDeviceAccessKey>";

           static string deviceId = "myfirstdevice";

           static Device device;

           static void Main(string[] args)

           {

               registryManager = RegistryManager.CreateFromConnectionString(connectionString);

    

               AddDeviceAsync().Wait();

    

               SendTelemetryMessageToDevice();

    

                       }

           private static async Task AddDeviceAsync()

           {        

              

               try

               {

                   device = await registryManager.AddDeviceAsync(new Device(deviceId));

    

               }

               catch (DeviceAlreadyExistsException)

               {

                   device = await registryManager.GetDeviceAsync(deviceId);

               }

    

               Console.WriteLine("Generated device key: {0}", device.Authentication.SymmetricKey.PrimaryKey);

    

           }

    

           private static async void SendTelemetryMessageToDevice()

           {

               try

               {

                   DeviceConnectionString = DeviceConnectionString.Replace("<yourIotHubName>", "your iot hub name");

                   DeviceConnectionString = DeviceConnectionString.Replace("<yourIotDeviceName>", deviceId);

                   DeviceConnectionString = DeviceConnectionString.Replace("<yourIotDeviceAccessKey>", device.Authentication.SymmetricKey.PrimaryKey);                            

    

                 

                   var deviceClient = DeviceClient.CreateFromConnectionString(DeviceConnectionString, Microsoft.Azure.Devices.Client.TransportType.Amqp);

    

                   var telemetrymessage = new {

                       memessage="TestMessage"

                   };               

    

                   var messageString = JsonConvert.SerializeObject(telemetrymessage);

                   var message = new Message(Encoding.ASCII.GetBytes(messageString));               

                   message.ContentType = "application/json";

                   message.ContentEncoding = "UTF-8";

    

                   await deviceClient.SendEventAsync(message);               

               }

               catch (Exception ex)

               {

    

               }

           }

       }

   }