public static CameraConfiguration CreateFromEnvironmentVariables()
{
var result = new CameraConfiguration();
var storageAccountEnv = Environment.GetEnvironmentVariable("storageaccount");
if (!string.IsNullOrEmpty(storageAccountEnv))
{
result.StorageAccount = storageAccountEnv;
Logger.Log($"Using storage account {result.StorageAccount}");
}
var storageKeyEnv = Environment.GetEnvironmentVariable("storagekey");
if (!string.IsNullOrEmpty(storageKeyEnv))
{
result.StorageKey = storageKeyEnv;
}
result.DeviceId = Environment.GetEnvironmentVariable("IOTEDGE_DEVICEID");
if (string.IsNullOrEmpty(result.DeviceId))
{
result.DeviceId = Environment.MachineName;
}
result.ModuleId = Environment.GetEnvironmentVariable("IOTEDGE_MODULEID");
if (string.IsNullOrEmpty(result.ModuleId))
{
result.ModuleId = "camera";
}
var outputEventsEnv = Environment.GetEnvironmentVariable("outputevents");
if (bool.TryParse(outputEventsEnv, out var parsedOutputEventsEnv))
{
result.OutputEvents = parsedOutputEventsEnv;
Logger.Log($"Outputting events: {result.OutputEvents}");
}
return(result);
}
/// <summary>
/// Initializes the ModuleClient and sets up the callback to receive
/// messages containing temperature information
/// </summary>
static async Task <int> InitAsync()
{
configuration = CameraConfiguration.CreateFromEnvironmentVariables();
camera = new Camera(configuration);
if (!camera.Initialize())
{
return(-1);
}
var transportSettings = new AmqpTransportSettings(TransportType.Amqp_Tcp_Only);
ITransportSettings[] settings = { transportSettings };
// Open a connection to the Edge runtime
ModuleClient ioTHubModuleClient = await ModuleClient.CreateFromEnvironmentAsync(settings);
await ioTHubModuleClient.OpenAsync();
Logger.Log("Initializing Pi camera module");
var twin = await ioTHubModuleClient.GetTwinAsync();
HandleTwinChanges(twin.Properties.Desired);
await ioTHubModuleClient.SetMethodDefaultHandlerAsync(ModuleMethodHandlerAsync, ioTHubModuleClient);
Logger.Log("Default method handler initialized");
await ioTHubModuleClient.SetDesiredPropertyUpdateCallbackAsync((updatedTwin, _) => {
HandleTwinChanges(updatedTwin);
return(Task.FromResult(0));
}, null);
Logger.Log("Twin changes callback is set");
Logger.Log("Ready!");
return(0);
}
public Camera(CameraConfiguration configuration)
{
this.configuration = configuration;
}