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David R. Williamson
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Merge pull request #169 from Azure-Samples/drwill/DeviceSimulator2
Update DeviceSimulator2
2 parents 39c99b2 + b3fdcb6 commit 98ac09e

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‎iot-hub/Quickstarts/Quickstarts.sln

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -9,7 +9,7 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "read-d2c-messages", "read-d
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EndProject
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Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "SimulatedDevice", "simulated-device\SimulatedDevice.csproj", "{C22BD1F5-D8A7-452A-96C4-FF0C0553EBF3}"
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EndProject
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Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "simulated-device-2", "simulated-device-2\simulated-device-2.csproj", "{3B033BD3-38B4-4B92-8871-2787DD7C86CC}"
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Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "SimulatedDeviceWithCommand", "simulated-device-2\SimulatedDeviceWithCommand.csproj", "{3B033BD3-38B4-4B92-8871-2787DD7C86CC}"
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EndProject
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution

‎iot-hub/Quickstarts/simulated-device-2/Program.cs

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,165 @@
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// Copyright (c) Microsoft. All rights reserved.
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// Licensed under the MIT license. See LICENSE file in the project root for full license information.
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// This application uses the Azure IoT Hub device SDK for .NET
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// For samples see: https://github.com/Azure/azure-iot-sdk-csharp/tree/master/iothub/device/samples
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using Microsoft.Azure.Devices.Client;
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using System;
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using System.Linq;
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using System.Text;
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using System.Text.Json;
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using System.Threading;
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using System.Threading.Tasks;
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namespace SimulatedDevice
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{
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/// <summary>
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/// This sample illustrates the very basics of a device app sending telemetry and receiving a command.
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/// For a more comprehensive device app sample, please see
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/// <see href="https://github.com/Azure-Samples/azure-iot-samples-csharp/tree/master/iot-hub/Samples/device/DeviceReconnectionSample"/>.
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/// </summary>
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internal class Program
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{
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private static DeviceClient s_deviceClient;
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private static readonly TransportType s_transportType = TransportType.Mqtt;
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// The device connection string to authenticate the device with your IoT hub.
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// Using the Azure CLI:
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// az iot hub device-identity show-connection-string --hub-name {YourIoTHubName} --device-id MyDotnetDevice --output table
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private static string s_connectionString = "{Your device connection string here}";
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private static TimeSpan s_telemetryInterval = TimeSpan.FromSeconds(1); // Seconds
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private static async Task Main(string[] args)
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{
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Console.WriteLine("IoT Hub Quickstarts #1 - Simulated device.");
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// This sample accepts the device connection string as a parameter, if present
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ValidateConnectionString(args);
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// Connect to the IoT hub using the MQTT protocol
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s_deviceClient = DeviceClient.CreateFromConnectionString(s_connectionString, s_transportType);
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// Create a handler for the direct method call
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await s_deviceClient.SetMethodHandlerAsync("SetTelemetryInterval", SetTelemetryInterval, null);
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// Set up a condition to quit the sample
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Console.WriteLine("Press control-C to exit.");
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using var cts = new CancellationTokenSource();
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Console.CancelKeyPress += (sender, eventArgs) =>
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{
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eventArgs.Cancel = true;
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cts.Cancel();
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Console.WriteLine("Device simulator exit requested...");
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};
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// Run the telemetry loop
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await SendDeviceToCloudMessagesAsync(cts.Token);
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s_deviceClient.Dispose();
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Console.WriteLine("Device simulator finished.");
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}
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private static void ValidateConnectionString(string[] args)
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{
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if (args.Any())
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{
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try
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{
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var cs = IotHubConnectionStringBuilder.Create(args[0]);
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s_connectionString = cs.ToString();
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}
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catch (Exception)
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{
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Console.WriteLine($"Error: Unrecognizable parameter '{args[0]}' as connection string.");
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Environment.Exit(1);
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}
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}
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else
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{
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try
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{
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_ = IotHubConnectionStringBuilder.Create(s_connectionString);
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}
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catch (Exception)
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{
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Console.WriteLine("This sample needs a device connection string to run. Program.cs can be edited to specify it, or it can be included on the command-line as the only parameter.");
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Environment.Exit(1);
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}
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}
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}
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// Handle the direct method call
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private static Task<MethodResponse> SetTelemetryInterval(MethodRequest methodRequest, object userContext)
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{
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var data = Encoding.UTF8.GetString(methodRequest.Data);
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// Check the payload is a single integer value
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if (int.TryParse(data, out int telemetryIntervalInSeconds))
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{
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s_telemetryInterval = TimeSpan.FromSeconds(telemetryIntervalInSeconds);
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Console.ForegroundColor = ConsoleColor.Green;
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Console.WriteLine($"Telemetry interval set to {s_telemetryInterval}");
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Console.ResetColor();
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// Acknowlege the direct method call with a 200 success message
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string result = $"{{\"result\":\"Executed direct method: {methodRequest.Name}\"}}";
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return Task.FromResult(new MethodResponse(Encoding.UTF8.GetBytes(result), 200));
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}
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else
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{
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// Acknowlege the direct method call with a 400 error message
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string result = "{\"result\":\"Invalid parameter\"}";
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return Task.FromResult(new MethodResponse(Encoding.UTF8.GetBytes(result), 400));
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}
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}
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// Async method to send simulated telemetry
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private static async Task SendDeviceToCloudMessagesAsync(CancellationToken ct)
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{
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// Initial telemetry values
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double minTemperature = 20;
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double minHumidity = 60;
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var rand = new Random();
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while (!ct.IsCancellationRequested)
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{
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double currentTemperature = minTemperature + rand.NextDouble() * 15;
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double currentHumidity = minHumidity + rand.NextDouble() * 20;
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// Create JSON message
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string messageBody = JsonSerializer.Serialize(
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new
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{
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temperature = currentTemperature,
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humidity = currentHumidity,
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});
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using var message = new Message(Encoding.ASCII.GetBytes(messageBody))
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{
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ContentType = "application/json",
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ContentEncoding = "utf-8",
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};
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// Add a custom application property to the message.
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// An IoT hub can filter on these properties without access to the message body.
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message.Properties.Add("temperatureAlert", (currentTemperature > 30) ? "true" : "false");
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// Send the telemetry message
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await s_deviceClient.SendEventAsync(message);
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Console.WriteLine($"{DateTime.Now} > Sending message: {messageBody}");
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try
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{
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await Task.Delay(s_telemetryInterval, ct);
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}
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catch (TaskCanceledException)
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{
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// User canceled
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return;
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}
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}
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}
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}
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}

‎iot-hub/Quickstarts/simulated-device-2/SimulatedDevice.cs

Lines changed: 0 additions & 96 deletions
This file was deleted.

‎iot-hub/Quickstarts/simulated-device-2/simulated-device-2.csproj renamed to ‎iot-hub/Quickstarts/simulated-device-2/SimulatedDeviceWithCommand.csproj

Lines changed: 3 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -1,12 +1,12 @@
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<Project Sdk="Microsoft.NET.Sdk">
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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<OutputType>Exe</OutputType>
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<TargetFramework>netcoreapp2.1</TargetFramework>
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<TargetFramework>net5.0</TargetFramework>
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</PropertyGroup>
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<ItemGroup>
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<PackageReference Include="Microsoft.Azure.Devices.Client" Version="1.*" />
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<PackageReference Include="Microsoft.Azure.Devices.Client" Version="1.33.1" />
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</ItemGroup>
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</Project>

‎iot-hub/Quickstarts/simulated-device/Program.cs

Lines changed: 23 additions & 5 deletions
Original file line numberDiff line numberDiff line change
@@ -21,6 +21,7 @@ namespace SimulatedDevice
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internal class Program
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{
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private static DeviceClient s_deviceClient;
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private static readonly TransportType s_transportType = TransportType.Mqtt;
2425

2526
// The device connection string to authenticate the device with your IoT hub.
2627
// Using the Azure CLI:
@@ -32,10 +33,10 @@ private static async Task Main(string[] args)
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Console.WriteLine("IoT Hub Quickstarts #1 - Simulated device.");
3334

3435
// This sample accepts the device connection string as a parameter, if present
35-
CheckForConnectionStringArgument(args);
36+
ValidateConnectionString(args);
3637

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// Connect to the IoT hub using the MQTT protocol
38-
s_deviceClient = DeviceClient.CreateFromConnectionString(s_connectionString, TransportType.Mqtt);
39+
s_deviceClient = DeviceClient.CreateFromConnectionString(s_connectionString, s_transportType);
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4041
// Set up a condition to quit the sample
4142
Console.WriteLine("Press control-C to exit.");
@@ -50,19 +51,36 @@ private static async Task Main(string[] args)
5051
// Run the telemetry loop
5152
await SendDeviceToCloudMessagesAsync(cts.Token);
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54+
s_deviceClient.Dispose();
5355
Console.WriteLine("Device simulator finished.");
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}
5557

56-
private static void CheckForConnectionStringArgument(string[] args)
58+
private static void ValidateConnectionString(string[] args)
5759
{
5860
if (args.Any())
5961
{
6062
try
6163
{
62-
var cs = IotHubConnectionStringBuilder.Create(args.First());
64+
var cs = IotHubConnectionStringBuilder.Create(args[0]);
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s_connectionString = cs.ToString();
6466
}
65-
catch (Exception) { }
67+
catch (Exception)
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{
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Console.WriteLine($"Error: Unrecognizable parameter '{args[0]}' as connection string.");
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Environment.Exit(1);
71+
}
72+
}
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else
74+
{
75+
try
76+
{
77+
_ = IotHubConnectionStringBuilder.Create(s_connectionString);
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}
79+
catch (Exception)
80+
{
81+
Console.WriteLine("This sample needs a device connection string to run. Program.cs can be edited to specify it, or it can be included on the command-line as the only parameter.");
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Environment.Exit(1);
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}
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}
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}
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