/// <summary>
/// Initializes the DeviceClient and sets up the callback to receive
/// messages containing temperature information
/// </summary>
static async Task Init(string connectionString, bool bypassCertVerification = false)
{
Console.WriteLine("Connection String: {0}", connectionString);
var mqttSetting = new MqttTransportSettings(TransportType.Mqtt_Tcp_Only);
// During dev you might want to bypass the cert verification. It is highly recommended to verify certs systematically in production
if (bypassCertVerification)
{
Console.WriteLine("Certificate verification is bypassed.");
mqttSetting.RemoteCertificateValidationCallback = (sender, certificate, chain, sslPolicyErrors) => true;
}
ITransportSettings[] settings = { mqttSetting };
// Open a connection to the Edge runtime
//var ioTHubModuleClient = DeviceClient.CreateFromConnectionString(connectionString, settings); //Andrey Fedorov
ModuleClient ioTHubModuleClient = null; //Andrey Fedorov
if (string.IsNullOrEmpty(connectionString)) //Andrey Fedorov
{
ioTHubModuleClient = await ModuleClient.CreateFromEnvironmentAsync(settings); //Andrey Fedorov
}
else //Andrey Fedorov
{
ioTHubModuleClient = ModuleClient.CreateFromConnectionString(connectionString, settings);
}
await ioTHubModuleClient.OpenAsync();
Console.WriteLine("IoT Hub module client initialized.");
var moduleTwin = await ioTHubModuleClient.GetTwinAsync();
var moduleTwinCollection = moduleTwin.Properties.Desired;
desiredPropertiesData = new DesiredPropertiesData(moduleTwinCollection);
// callback for updating desired properties through the portal or rest api
await ioTHubModuleClient.SetDesiredPropertyUpdateCallbackAsync(OnDesiredPropertiesUpdate, null);
// this direct method will allow to reset the temperature sensor values back to their initial state
await ioTHubModuleClient.SetMethodHandlerAsync("reset", ResetMethod, null);
// we don't pass ioTHubModuleClient as we're not sending any messages out to the message bus
// Register callback to be called when a message is received by the module
await ioTHubModuleClient.SetInputMessageHandlerAsync("control", ControlMessageHandler, null);
// as this runs in a loop we don't await
SendSimulationData(ioTHubModuleClient);
}
/// <summary>
/// Initializes the DeviceClient and sets up the callback to receive
/// messages containing temperature information
/// </summary>
static async Task Init()
{
// Do not do this in production
// After creating Edge certs, I was not able to fix validation, I keep getting "The remote certificate is invalid according to the validation procedure."
bool DisableCertCheck = false;
//DEBUG: print all environment variables
Console.WriteLine("DEBUG: Printing environment variables:");
foreach (DictionaryEntry e in Environment.GetEnvironmentVariables())
{
Console.WriteLine(e.Key + ":" + e.Value);
}
Console.WriteLine("---");
// From https://docs.microsoft.com/en-us/azure/iot-edge/how-to-create-transparent-gateway-linux#installation-on-the-downstream-device
Console.WriteLine("DEBUG: installing root CA certificate...");
string certPath = "/app/azure-iot-test-only.root.ca.cert.pem";
if (!File.Exists(certPath))
{
Console.WriteLine($"Missing path to root CA certificate file: {certPath}");
throw new InvalidOperationException("Missing certificate file.");
}
else
{
X509Store store = new X509Store(StoreName.Root, StoreLocation.CurrentUser);
store.Open(OpenFlags.ReadWrite);
store.Add(new X509Certificate2(X509Certificate2.CreateFromCertFile(certPath)));
store.Close();
}
// Create iot hub client
// Code copied over from FilterModule
AmqpTransportSettings amqpSetting = new AmqpTransportSettings(TransportType.Amqp_Tcp_Only);
if (DisableCertCheck)
{
Console.WriteLine("DEBUG: disabling certificate validation. DO NOT USE IN PRODUCTION!");
amqpSetting.RemoteCertificateValidationCallback = new RemoteCertificateValidationCallback(ValidateServerCertificate);
}
ITransportSettings[] settings = { amqpSetting };
// Open a connection to the Edge runtime
ModuleClient ioTHubModuleClient = await ModuleClient.CreateFromEnvironmentAsync(settings);
await ioTHubModuleClient.OpenAsync();
Console.WriteLine("IoT Hub module client initialized.");
/* Original code, part of it was in Main()
*
* // The Edge runtime gives us the connection string we need -- it is injected as an environment variable
* var connectionString = Environment.GetEnvironmentVariable("EdgeHubConnectionString");
*
* // Cert verification is not yet fully functional when using Windows OS for the container
* var bypassCertVerification = RuntimeInformation.IsOSPlatform(OSPlatform.Windows);
* if (!bypassCertVerification) InstallCert();
* await Init(connectionString, bypassCertVerification);
*
* Console.WriteLine("Connection String {0}", connectionString);
*
* var mqttSetting = new MqttTransportSettings(TransportType.Mqtt_Tcp_Only);
* // During dev you might want to bypass the cert verification. It is highly recommended to verify certs systematically in production
* if (bypassCertVerification)
* {
* mqttSetting.RemoteCertificateValidationCallback = (sender, certificate, chain, sslPolicyErrors) => true;
* }
* ITransportSettings[] settings = { mqttSetting };
*
* // Open a connection to the Edge runtime
* var ioTHubModuleClient = DeviceClient.CreateFromConnectionString(connectionString, settings);
* await ioTHubModuleClient.OpenAsync();
* Console.WriteLine("IoT Hub module client initialized.");
*/
var moduleTwin = await ioTHubModuleClient.GetTwinAsync();
var moduleTwinCollection = moduleTwin.Properties.Desired;
desiredPropertiesData = new DesiredPropertiesData(moduleTwinCollection);
// callback for updating desired properties through the portal or rest api
await ioTHubModuleClient.SetDesiredPropertyUpdateCallbackAsync(OnDesiredPropertiesUpdate, null);
// this direct method will allow to reset the temperature sensor values back to their initial state
await ioTHubModuleClient.SetMethodHandlerAsync("reset", ResetMethod, null);
// we don't pass ioTHubModuleClient as we're not sending any messages out to the message bus
await ioTHubModuleClient.SetInputMessageHandlerAsync("control", ControlMessageHandler, null);
// as this runs in a loop we don't await
SendSimulationData(ioTHubModuleClient);
}
private static Task OnDesiredPropertiesUpdate(TwinCollection twinCollection, object userContext)
{
desiredPropertiesData = new DesiredPropertiesData(twinCollection);
return(Task.CompletedTask);
}
