add mqtt client

Clients/MQTTClient/MQTTClient/MQTTClient.csproj

+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>netcoreapp2.2</TargetFramework>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="MQTTnet" Version="3.0.2" />
+    <PackageReference Include="Newtonsoft.Json" Version="12.0.2" />
+  </ItemGroup>
+
+</Project>

Clients/MQTTClient/MQTTClient/Program.cs

+using MQTTnet;
+using MQTTnet.Client;
+using MQTTnet.Client.Options;
+using Newtonsoft.Json;
+using System;
+using System.Threading.Tasks;
+
+namespace MQTTClient
+{
+    internal class Program
+    {
+        private static void Main(string[] args)
+        {
+            Console.WriteLine("Hello World!");
+            MQTTnet.MqttFactory factory = new MQTTnet.MqttFactory();
+            var client = factory.CreateMqttClient();
+            var options = new MqttClientOptionsBuilder()
+                        .WithClientId(Guid.NewGuid().ToString())
+                        .WithTcpServer("localhost")
+                        .WithCredentials("3cb97cd31fbc40b08d12ec47a6fad622")//token
+                        .Build();
+            Task.Run(async () =>
+            {
+                await client.ConnectAsync(options);
+                do
+                {
+                    var message = new MqttApplicationMessageBuilder()
+                                   .WithTopic("/devices/me/telemetry")
+                                   .WithPayload(JsonConvert.SerializeObject(new
+                                   {
+                                       RandomString = Guid.NewGuid().ToString(),
+                                       NowTime = DateTime.Now
+                                   }))
+                                   .Build();
+                    Console.WriteLine(message.ConvertPayloadToString());
+                    await client.PublishAsync(message);
+                    await Task.Delay(TimeSpan.FromSeconds(10));
+                } while (Console.ReadKey().Key != ConsoleKey.Escape);
+                await client.DisconnectAsync();
+            }).Wait();
+        }
+    }
+}
\ No newline at end of file

Clients/MQTTClient/MQTTClient/readme.md

+### Topic
+
+- Upload telemetry  to device 
+    /devices/me/telemetry
+- Upload telemetry data to gateway's device
+    /devices/devicename/telemetry
+
+- Upload attributes to device 
+    /devices/me/attributes
+- Upload attributes data to gateway's device
+    /devices/devicename/telemetry
+
+
+
+

IoTSharp.sln

@@ -19,6 +19,8 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Clients", "Clients", "{897B
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "CoAPClient", "Clients\CoAPClient\CoAPClient.csproj", "{EE801BD6-5757-4A55-BC94-7FBA6E98F393}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MQTTClient", "Clients\MQTTClient\MQTTClient\MQTTClient.csproj", "{FD6857C8-295B-492C-B959-C8773149B96D}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -37,12 +39,17 @@ Global
 		{EE801BD6-5757-4A55-BC94-7FBA6E98F393}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{EE801BD6-5757-4A55-BC94-7FBA6E98F393}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{EE801BD6-5757-4A55-BC94-7FBA6E98F393}.Release|Any CPU.Build.0 = Release|Any CPU
+		{FD6857C8-295B-492C-B959-C8773149B96D}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{FD6857C8-295B-492C-B959-C8773149B96D}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{FD6857C8-295B-492C-B959-C8773149B96D}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{FD6857C8-295B-492C-B959-C8773149B96D}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
 	EndGlobalSection
 	GlobalSection(NestedProjects) = preSolution
 		{EE801BD6-5757-4A55-BC94-7FBA6E98F393} = {897B15C4-C504-4B7C-B01F-E6162959B665}
+		{FD6857C8-295B-492C-B959-C8773149B96D} = {897B15C4-C504-4B7C-B01F-E6162959B665}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {CD7ADD62-E3BD-453A-B653-BC70DB9FF817}