private async Task RunApplication()
{
_logging.LogMessage("Initializing Application", LoggingLevel.Verbose);
//Set up IoT Hub Device
if (!await _azureIoTHubService.Init(_tpmDevice.GetConnectionString()))
{
_logging.LogMessage("The application was not initialized. Please make sure that the TPM service is properly set up on Device 0. Then restart the application.", LoggingLevel.Error);
return;
}
await InitConfig();
await _cameraService.Init(_config.CameraIndex, _config.CameraResolution);
_cognitiveService.Init(_config.CognitiveVisionAPIKey);
//Run the program
_isRunning = true;
do
{
_isInterruptRequested = false;
if (_cameraService.IsInitialized && _azureIoTHubService.Connected &&
!string.IsNullOrEmpty(_config.EventId) && !string.IsNullOrEmpty(_config.CognitiveVisionAPIKey))
{
using (var captureStream = new InMemoryRandomAccessStream())
{
await _cameraService.TakePhotoToStream(captureStream);
if (captureStream.Position != 0)
{
string text = await _cognitiveService.ProcessPhotoFromStream(captureStream);
if (!string.IsNullOrEmpty(text))
{
await _azureIoTHubService.SendDeviceToCloudMessageAsync(new NoteMessage()
{
EventId = _config.EventId,
Note = text,
Type = "Note"
});
}
else
{
_logging.LogMessage("No note was found.", LoggingLevel.Verbose);
}
}
}
}
else
{
_isInterruptRequested = true;
_config.IntervalPhoto = 5;
}
await Task.Delay(_config.IntervalPhoto * 1000);
}while (!_isInterruptRequested);
//Program interrupted, dispose the services
if (!_azureIoTHubService.Connected)
{
_azureIoTHubService.Dispose();
}
_cameraService.Dispose();
_isRunning = false;
//Restart
await RunApplication();
}
protected override void OnDestroy()
{
base.OnDestroy();
_cameraService.Dispose();
}