private void Rfm9XDevice_OnReceive(object sender, Rfm9XDevice.OnDataReceivedEventArgs e)
{
LoggingFields messageHandlerLoggingFields = new LoggingFields();
#if DEBUG
Debug.WriteLine($"{DateTime.UtcNow:HH:mm:ss}-OnReceive From:{BitConverter.ToString(e.Address)} PacketSnr:{e.PacketSnr:0.0} Packet RSSI:{e.PacketRssi}dBm RSSI:{e.Rssi}dBm Length:{e.Data.Length}");
#endif
messageHandlerLoggingFields.AddString("PacketSNR", e.PacketSnr.ToString("F1"));
messageHandlerLoggingFields.AddInt32("PacketRSSI", e.PacketRssi);
messageHandlerLoggingFields.AddInt32("RSSI", e.Rssi);
string addressBcdText = BitConverter.ToString(e.Address);
messageHandlerLoggingFields.AddInt32("DeviceAddressLength", e.Address.Length);
messageHandlerLoggingFields.AddString("DeviceAddressBCD", addressBcdText);
if (messageHandler != null)
{
try
{
messageHandler.Rfm9XOnReceive(e);
}
catch (Exception ex)
{
messageHandlerLoggingFields.AddString("MessageHandler Exception", ex.ToString());
this.logging.LogEvent("Rfm9XDevice_OnReceive", messageHandlerLoggingFields, LoggingLevel.Error);
return;
}
}
this.logging.LogEvent("Rfm9XDevice_OnReceive", messageHandlerLoggingFields, LoggingLevel.Information);
}
private async Task <MethodResponse> DeviceSendAsync(MethodRequest methodRequest, object userContext)
{
LoggingFields sendLoggingInfo = new LoggingFields();
this.logging.LogEvent("Send BCD initiated");
try
{
// Initially use a dynamic maybe use a decorated class in future
dynamic json = JValue.Parse(methodRequest.DataAsJson);
string deviceAddressBcd = json.DeviceAddress;
sendLoggingInfo.AddString("DeviceAddressBCD", deviceAddressBcd);
Debug.WriteLine($"DeviceSendAsync DeviceAddressBCD {deviceAddressBcd}");
byte[] deviceAddressBytes = deviceAddressBcd.Split('-').Select(x => byte.Parse(x, NumberStyles.HexNumber)).ToArray();
sendLoggingInfo.AddInt32("DeviceAddressBytes Length", deviceAddressBytes.Length);
Debug.WriteLine($"DeviceSendAsync DeviceAddressLength {deviceAddressBytes.Length}");
if ((deviceAddressBytes.Length < Rfm9XDevice.AddressLengthMinimum) || (deviceAddressBytes.Length > Rfm9XDevice.AddressLengthMaximum))
{
this.logging.LogEvent("DeviceSendAsync failed device address bytes length", sendLoggingInfo, LoggingLevel.Error);
return(new MethodResponse(414));
}
string messagedBcd = json.DevicePayload;
sendLoggingInfo.AddString("MessageBCD", messagedBcd);
byte[] messageBytes = messagedBcd.Split('-').Select(x => byte.Parse(x, NumberStyles.HexNumber)).ToArray(); // changed the '-' to ' '
sendLoggingInfo.AddInt32("MessageBytesLength", messageBytes.Length);
Debug.WriteLine($"DeviceSendAsync DeviceAddress:{deviceAddressBcd} Payload:{messagedBcd}");
if ((messageBytes.Length < Rfm9XDevice.MessageLengthMinimum) || (messageBytes.Length > Rfm9XDevice.MessageLengthMaximum))
{
this.logging.LogEvent("DeviceSendAsync failed payload Length", sendLoggingInfo, LoggingLevel.Error);
return(new MethodResponse(413));
}
if (sendMessageQueue.TryAdd(deviceAddressBytes, messageBytes))
{
this.logging.LogEvent("DeviceSendAsync failed message already queued", sendLoggingInfo, LoggingLevel.Error);
return(new MethodResponse(409));
}
this.logging.LogEvent("DeviceSendAsync success", sendLoggingInfo, LoggingLevel.Information);
}
catch (Exception ex)
{
sendLoggingInfo.AddString("Exception", ex.ToString());
this.logging.LogEvent("DeviceSendAsync failed exception", sendLoggingInfo, LoggingLevel.Error);
return(new MethodResponse(400));
}
return(new MethodResponse(200));
}
async Task PayloadText(DeviceClient azureIoTHubClient, Rfm9XDevice.OnDataReceivedEventArgs e)
{
JObject telemetryDataPoint = new JObject();
LoggingFields processLoggingFields = new LoggingFields();
processLoggingFields.AddString("PacketSNR", e.PacketSnr.ToString("F1"));
telemetryDataPoint.Add("PacketSNR", e.PacketSnr.ToString("F1"));
processLoggingFields.AddInt32("PacketRSSI", e.PacketRssi);
telemetryDataPoint.Add("PacketRSSI", e.PacketRssi);
processLoggingFields.AddInt32("RSSI", e.Rssi);
telemetryDataPoint.Add("RSSI", e.Rssi);
string addressBcdText = BitConverter.ToString(e.Address);
processLoggingFields.AddInt32("DeviceAddressLength", e.Address.Length);
processLoggingFields.AddString("DeviceAddressBCD", addressBcdText);
telemetryDataPoint.Add("DeviceAddressBCD", addressBcdText);
string messageBcdText = BitConverter.ToString(e.Data);
processLoggingFields.AddInt32("MessageLength", e.Data.Length);
processLoggingFields.AddString("MessageBCD", messageBcdText);
try
{
string messageText = UTF8Encoding.UTF8.GetString(e.Data);
processLoggingFields.AddString("MessageText", messageText);
telemetryDataPoint.Add("Payload", messageText);
}
catch (Exception)
{
this.logging.LogEvent("PayloadProcess failure converting payload to text", processLoggingFields, LoggingLevel.Warning);
return;
}
try
{
using (Message message = new Message(Encoding.ASCII.GetBytes(JsonConvert.SerializeObject(telemetryDataPoint))))
{
Debug.WriteLine(" {0:HH:mm:ss} AzureIoTHubClient SendEventAsync start", DateTime.UtcNow);
await this.azureIoTHubClient.SendEventAsync(message);
Debug.WriteLine(" {0:HH:mm:ss} AzureIoTHubClient SendEventAsync finish", DateTime.UtcNow);
}
this.logging.LogEvent("SendEventAsync Text payload", processLoggingFields, LoggingLevel.Information);
}
catch (Exception ex)
{
processLoggingFields.AddString("Exception", ex.ToString());
this.logging.LogEvent("SendEventAsync Text payload", processLoggingFields, LoggingLevel.Error);
}
}
private void WriteLog(string text,
LoggingLevel loggingLevel = LoggingLevel.Verbose,
[CallerMemberName] string memberName = "",
[CallerFilePath] string sourceFilePath = "",
[CallerLineNumber] int sourceLineNumber = 0)
{
Debug.WriteLine($"[Log::{Enum.GetName(typeof(LoggingLevel), loggingLevel)}][{memberName}] {text}");
if (_session == null || _channel == null)
{
Debug.WriteLine("Error: Logger is not initialized");
return;
}
try
{
string message =
"Message: " + text + Environment.NewLine + Environment.NewLine +
"Member name: " + memberName + Environment.NewLine +
"Source file path: " + sourceFilePath + Environment.NewLine +
"Source line number: " + sourceLineNumber + Environment.NewLine;
var fields = new LoggingFields();
fields.AddString("MemberName", memberName);
fields.AddString("SourceFilePath", sourceFilePath);
fields.AddInt32("SourceLineNumber", sourceLineNumber);
fields.AddString("Message", text);
_channel.LogEvent("LogEvent", fields, loggingLevel);
}
catch (Exception ex)
{
Debug.WriteLine("[Log] " + ex);
}
}
public void Run(IBackgroundTaskInstance taskInstance)
{
LoggingFields startupInformation = new LoggingFields();
this.logging.LogEvent("Application starting");
try
{
this.mediaCapture = new MediaCapture();
this.mediaCapture.InitializeAsync().AsTask().Wait();
Debug.WriteLine("Camera configuration success");
GpioController gpioController = GpioController.GetDefault();
this.interruptGpioPin = gpioController.OpenPin(InterruptPinNumber);
this.interruptGpioPin.SetDriveMode(GpioPinDriveMode.InputPullUp);
this.interruptGpioPin.ValueChanged += this.InterruptGpioPin_ValueChanged;
Debug.WriteLine("Digital Input Interrupt configuration success");
}
catch (Exception ex)
{
this.logging.LogMessage("Camera or digital input configuration failed " + ex.Message, LoggingLevel.Error);
return;
}
startupInformation.AddString("PrimaryUse", this.mediaCapture.VideoDeviceController.PrimaryUse.ToString());
startupInformation.AddInt32("Interrupt pin", InterruptPinNumber);
this.logging.LogEvent("Application started", startupInformation);
// enable task to continue running in background
this.backgroundTaskDeferral = taskInstance.GetDeferral();
}
void IMessageHandler.Rfm9XOnReceive(Rfm9XDevice.OnDataReceivedEventArgs e)
{
LoggingFields processReceiveLoggingFields = new LoggingFields();
processReceiveLoggingFields.AddString("PacketSNR", e.PacketSnr.ToString("F1"));
processReceiveLoggingFields.AddInt32("PacketRSSI", e.PacketRssi);
processReceiveLoggingFields.AddInt32("RSSI", e.Rssi);
string addressBcdText = BitConverter.ToString(e.Address);
processReceiveLoggingFields.AddInt32("DeviceAddressLength", e.Address.Length);
processReceiveLoggingFields.AddString("DeviceAddressBCD", addressBcdText);
string payloadBcdText = BitConverter.ToString(e.Data);
processReceiveLoggingFields.AddInt32("PayloadLength", e.Data.Length);
processReceiveLoggingFields.AddString("DeviceAddressBCD", payloadBcdText);
this.Logging.LogEvent("Rfm9XOnReceive", processReceiveLoggingFields, LoggingLevel.Information);
}
public void ResizeVisibleComplete(int viewId)
{
if (!GetTraceLoggingProviderEnabled())
{
return;
}
LoggingFields fields = new LoggingFields();
PopulateAppInfo(fields);
fields.AddInt32("ViewId", viewId);
LogAppLifecycleEvent("ModernAppResize_VisibleComplete", fields);
}
/// <summary>
/// Logs an exception and returns it.
/// </summary>
/// <param name="msg">A message associated with the exception.</param>
/// <param name="exception">The exception.</param>
/// <returns>The exception.</returns>
public static Exception LogException(string msg, Exception exception)
{
Debug.WriteLine("Exception: " + msg);
Debug.WriteLine("Message: " + exception.Message);
LoggingFields fields = new LoggingFields();
fields.AddString("Error message", msg);
fields.AddString("Exception message", exception.Message);
fields.AddInt32("HResult", exception.HResult);
Instance().channel.LogEvent("Exception", fields, LoggingLevel.Error);
return(exception);
}
private static void PushException(ref LoggingFields a, Exception m)
{
if (m != null)
{
a.BeginStruct("Exception");
a.AddString("Type", m.GetType().Name);
a.AddString("Message", m.Message ?? string.Empty);
a.AddString("Source", m.Source ?? string.Empty);
a.AddInt32("HResult", m.HResult);
a.AddString("StackTrace", m.StackTrace ?? string.Empty);
PushException(ref a, m.InnerException);
a.EndStruct();
}
else
{
return;
}
}
private async Task <MethodResponse> RestartAsync(MethodRequest methodRequest, object userContext)
{
LoggingFields restartLoggingInfo = new LoggingFields();
#if CLOUD_DEVICE_SEND
restartLoggingInfo.AddInt32("Send message queue count", sendMessageQueue.Count);
#endif
restartLoggingInfo.AddTimeSpan("Device restart period", DeviceRestartPeriod);
// Disconnect the transmit and receive callbacks, once messages Send & Push need to consider what todo with queued outbound messages
rfm9XDevice.OnReceive -= Rfm9XDevice_OnReceive;
rfm9XDevice.OnTransmit -= Rfm9XDevice_OnTransmit;
this.logging.LogEvent("Restart initiated", restartLoggingInfo, LoggingLevel.Information);
ShutdownManager.BeginShutdown(ShutdownKind.Restart, DeviceRestartPeriod);
return(new MethodResponse(200));
}
private async Task <MethodResponse> DeviceBondAsync(MethodRequest methodRequest, object userContext)
{
LoggingFields bondLoggingInfo = new LoggingFields();
try
{
dynamic json = JValue.Parse(methodRequest.DataAsJson);
string deviceAddressBcd = json.DeviceAddressBCD;
bondLoggingInfo.AddString("DeviceAddressBCD", deviceAddressBcd);
Debug.WriteLine($"DeviceBondAsync DeviceAddressBCD {deviceAddressBcd}");
byte[] deviceAddressBytes = deviceAddressBcd.Split('-').Select(x => byte.Parse(x, NumberStyles.HexNumber)).ToArray();
bondLoggingInfo.AddInt32("DeviceAddressBytes Length", deviceAddressBytes.Length);
Debug.WriteLine($"DeviceBondAsync DeviceAddressLength {deviceAddressBytes.Length}");
if ((deviceAddressBytes.Length < Rfm9XDevice.AddressLengthMinimum) || (deviceAddressBytes.Length > Rfm9XDevice.AddressLengthMaximum))
{
this.logging.LogEvent("DeviceBondAsync failed device address bytes length", bondLoggingInfo, LoggingLevel.Error);
return(new MethodResponse(414));
}
// Empty payload for bond message
byte[] payloadBytes = {};
rfm9XDevice.Send(deviceAddressBytes, payloadBytes);
this.logging.LogEvent("DeviceBondAsync success", bondLoggingInfo, LoggingLevel.Information);
}
catch (Exception ex)
{
bondLoggingInfo.AddString("Exception", ex.ToString());
this.logging.LogEvent("DeviceBondAsync exception", bondLoggingInfo, LoggingLevel.Error);
return(new MethodResponse(400));
}
return(new MethodResponse(200));
}
private async void Rfm9XDevice_OnReceive(object sender, Rfm9XDevice.OnDataReceivedEventArgs e)
{
string addressBcdText;
string messageBcdText;
string messageText = "";
char[] sensorReadingSeparator = new char[] { ',' };
char[] sensorIdAndValueSeparator = new char[] { ' ' };
addressBcdText = BitConverter.ToString(e.Address);
messageBcdText = BitConverter.ToString(e.Data);
try
{
messageText = UTF8Encoding.UTF8.GetString(e.Data);
}
catch (Exception)
{
this.logging.LogMessage("Failure converting payload to text", LoggingLevel.Error);
return;
}
#if DEBUG
Debug.WriteLine(@"{0:HH:mm:ss}-RX From {1} PacketSnr {2:0.0} Packet RSSI {3}dBm RSSI {4}dBm = {5} byte message ""{6}""", DateTime.Now, addressBcdText, e.PacketSnr, e.PacketRssi, e.Rssi, e.Data.Length, messageText);
#endif
LoggingFields messagePayload = new LoggingFields();
messagePayload.AddInt32("AddressLength", e.Address.Length);
messagePayload.AddString("Address-BCD", addressBcdText);
messagePayload.AddInt32("Message-Length", e.Data.Length);
messagePayload.AddString("Message-BCD", messageBcdText);
messagePayload.AddString("Nessage-Unicode", messageText);
messagePayload.AddDouble("Packet SNR", e.PacketSnr);
messagePayload.AddInt32("Packet RSSI", e.PacketRssi);
messagePayload.AddInt32("RSSI", e.Rssi);
this.logging.LogEvent("Message Data", messagePayload, LoggingLevel.Verbose);
// Check the address is not to short/long
if (e.Address.Length < AddressLengthMinimum)
{
this.logging.LogMessage("From address too short", LoggingLevel.Warning);
return;
}
if (e.Address.Length > MessageLengthMaximum)
{
this.logging.LogMessage("From address too long", LoggingLevel.Warning);
return;
}
// Check the payload is not too short/long
if (e.Data.Length < MessageLengthMinimum)
{
this.logging.LogMessage("Message too short to contain any data", LoggingLevel.Warning);
return;
}
if (e.Data.Length > MessageLengthMaximum)
{
this.logging.LogMessage("Message too long to contain valid data", LoggingLevel.Warning);
return;
}
// Adafruit IO is case sensitive & onlye does lower case ?
string deviceId = addressBcdText.ToLower();
// Chop up the CSV text payload
string[] sensorReadings = messageText.Split(sensorReadingSeparator, StringSplitOptions.RemoveEmptyEntries);
if (sensorReadings.Length == 0)
{
this.logging.LogMessage("Payload contains no sensor readings", LoggingLevel.Warning);
return;
}
Group_feed_data groupFeedData = new Group_feed_data();
LoggingFields sensorData = new LoggingFields();
sensorData.AddString("DeviceID", deviceId);
// Chop up each sensor reading into an ID & value
foreach (string sensorReading in sensorReadings)
{
string[] sensorIdAndValue = sensorReading.Split(sensorIdAndValueSeparator, StringSplitOptions.RemoveEmptyEntries);
// Check that there is an id & value
if (sensorIdAndValue.Length != 2)
{
this.logging.LogMessage("Sensor reading invalid format", LoggingLevel.Warning);
return;
}
string sensorId = sensorIdAndValue[0].ToLower();
string value = sensorIdAndValue[1];
// Construct the sensor ID from SensordeviceID & Value ID
groupFeedData.Feeds.Add(new Anonymous2()
{
Key = string.Format("{0}{1}", deviceId, sensorId), Value = value
});
sensorData.AddString(sensorId, value);
Debug.WriteLine(" Sensor {0}{1} Value {2}", deviceId, sensorId, value);
}
this.logging.LogEvent("Sensor readings", sensorData, LoggingLevel.Verbose);
try
{
Debug.WriteLine(" CreateGroupDataAsync start");
await this.adaFruitIOClient.CreateGroupDataAsync(this.applicationSettings.AdaFruitIOUserName, this.applicationSettings.AdaFruitIOGroupName.ToLower(), groupFeedData);
Debug.WriteLine(" CreateGroupDataAsync finish");
}
catch (Exception ex)
{
Debug.WriteLine(" CreateGroupDataAsync failed {0}", ex.Message);
this.logging.LogMessage("CreateGroupDataAsync failed " + ex.Message, LoggingLevel.Error);
}
}
public void Run(IBackgroundTaskInstance taskInstance)
{
StorageFolder localFolder = ApplicationData.Current.LocalFolder;
TimeSpan imageUpdateDue;
TimeSpan imageUpdatePeriod;
this.logging.LogEvent("Application starting");
// Log the Application build, OS version information etc.
LoggingFields startupInformation = new LoggingFields();
startupInformation.AddString("Timezone", TimeZoneSettings.CurrentTimeZoneDisplayName);
startupInformation.AddString("OSVersion", Environment.OSVersion.VersionString);
startupInformation.AddString("MachineName", Environment.MachineName);
// This is from the application manifest
Package package = Package.Current;
PackageId packageId = package.Id;
PackageVersion version = packageId.Version;
startupInformation.AddString("ApplicationVersion", string.Format($"{version.Major}.{version.Minor}.{version.Build}.{version.Revision}"));
try
{
// see if the configuration file is present if not copy minimal sample one from application directory
if (localFolder.TryGetItemAsync(ConfigurationFilename).AsTask().Result == null)
{
StorageFile templateConfigurationfile = Package.Current.InstalledLocation.GetFileAsync(ConfigurationFilename).AsTask().Result;
templateConfigurationfile.CopyAsync(localFolder, ConfigurationFilename).AsTask();
}
IConfiguration configuration = new ConfigurationBuilder().AddJsonFile(Path.Combine(localFolder.Path, ConfigurationFilename), false, true).Build();
this.interruptPinNumber = int.Parse(configuration.GetSection("InterruptPinNumber").Value);
startupInformation.AddInt32("Interrupt pin", this.interruptPinNumber);
this.interruptTriggerOn = (GpioPinEdge)Enum.Parse(typeof(GpioPinEdge), configuration.GetSection("interruptTriggerOn").Value);
startupInformation.AddString("Interrupt Trigger on", this.interruptTriggerOn.ToString());
this.displayPinNumber = int.Parse(configuration.GetSection("DisplayPinNumber").Value);
startupInformation.AddInt32("Display pin", this.interruptPinNumber);
this.azureIoTHubConnectionString = configuration.GetSection("AzureIoTHubConnectionString").Value;
startupInformation.AddString("AzureIoTHubConnectionString", this.azureIoTHubConnectionString);
this.transportType = (TransportType)Enum.Parse(typeof(TransportType), configuration.GetSection("TransportType").Value);
startupInformation.AddString("TransportType", this.transportType.ToString());
}
catch (Exception ex)
{
this.logging.LogMessage("JSON configuration file load or settings retrieval failed " + ex.Message, LoggingLevel.Error);
return;
}
#region AzureIoT Hub connection string creation
try
{
this.azureIoTHubClient = DeviceClient.CreateFromConnectionString(this.azureIoTHubConnectionString, this.transportType);
}
catch (Exception ex)
{
this.logging.LogMessage("AzureIOT Hub DeviceClient.CreateFromConnectionString failed " + ex.Message, LoggingLevel.Error);
return;
}
#endregion
#region Report device and application properties to AzureIoT Hub
try
{
TwinCollection reportedProperties = new TwinCollection();
// This is from the OS
reportedProperties["Timezone"] = TimeZoneSettings.CurrentTimeZoneDisplayName;
reportedProperties["OSVersion"] = Environment.OSVersion.VersionString;
reportedProperties["MachineName"] = Environment.MachineName;
reportedProperties["ApplicationDisplayName"] = package.DisplayName;
reportedProperties["ApplicationName"] = packageId.Name;
reportedProperties["ApplicationVersion"] = string.Format($"{version.Major}.{version.Minor}.{version.Build}.{version.Revision}");
// Unique identifier from the hardware
SystemIdentificationInfo systemIdentificationInfo = SystemIdentification.GetSystemIdForPublisher();
using (DataReader reader = DataReader.FromBuffer(systemIdentificationInfo.Id))
{
byte[] bytes = new byte[systemIdentificationInfo.Id.Length];
reader.ReadBytes(bytes);
reportedProperties["SystemId"] = BitConverter.ToString(bytes);
}
this.azureIoTHubClient.UpdateReportedPropertiesAsync(reportedProperties).Wait();
}
catch (Exception ex)
{
this.logging.LogMessage("Azure IoT Hub client UpdateReportedPropertiesAsync failed " + ex.Message, LoggingLevel.Error);
return;
}
#endregion
#region Retrieve device twin settings
try
{
LoggingFields configurationInformation = new LoggingFields();
Twin deviceTwin = this.azureIoTHubClient.GetTwinAsync().GetAwaiter().GetResult();
if (!deviceTwin.Properties.Desired.Contains("ImageUpdateDue") || !TimeSpan.TryParse(deviceTwin.Properties.Desired["ImageUpdateDue"].value.ToString(), out imageUpdateDue))
{
this.logging.LogMessage("DeviceTwin.Properties ImageUpdateDue setting missing or invalid format", LoggingLevel.Warning);
return;
}
configurationInformation.AddTimeSpan("ImageUpdateDue", imageUpdateDue);
if (!deviceTwin.Properties.Desired.Contains("ImageUpdatePeriod") || !TimeSpan.TryParse(deviceTwin.Properties.Desired["ImageUpdatePeriod"].value.ToString(), out imageUpdatePeriod))
{
this.logging.LogMessage("DeviceTwin.Properties ImageUpdatePeriod setting missing or invalid format", LoggingLevel.Warning);
return;
}
configurationInformation.AddTimeSpan("ImageUpdatePeriod", imageUpdatePeriod);
if (!deviceTwin.Properties.Desired.Contains("ModelType") || (!Enum.TryParse(deviceTwin.Properties.Desired["ModelType"].value.ToString(), out modelType)))
{
this.logging.LogMessage("DeviceTwin.Properties ModelType setting missing or invalid format", LoggingLevel.Warning);
return;
}
configurationInformation.AddString("ModelType", modelType.ToString());
if (!deviceTwin.Properties.Desired.Contains("ModelPublishedName") || (string.IsNullOrWhiteSpace(deviceTwin.Properties.Desired["ModelPublishedName"].value.ToString())))
{
this.logging.LogMessage("DeviceTwin.Properties ModelPublishedName setting missing or invalid format", LoggingLevel.Warning);
return;
}
modelPublishedName = deviceTwin.Properties.Desired["ModelPublishedName"].value.ToString();
configurationInformation.AddString("ModelPublishedName", modelPublishedName);
if (!deviceTwin.Properties.Desired.Contains("ProjectID") || (!Guid.TryParse(deviceTwin.Properties.Desired["ProjectID"].value.ToString(), out projectId)))
{
this.logging.LogMessage("DeviceTwin.Properties ProjectId setting missing or invalid format", LoggingLevel.Warning);
return;
}
configurationInformation.AddGuid("ProjectID", projectId);
if (!deviceTwin.Properties.Desired.Contains("ProbabilityThreshold") || (!Double.TryParse(deviceTwin.Properties.Desired["ProbabilityThreshold"].value.ToString(), out probabilityThreshold)))
{
this.logging.LogMessage("DeviceTwin.Properties ProbabilityThreshold setting missing or invalid format", LoggingLevel.Warning);
return;
}
configurationInformation.AddDouble("ProbabilityThreshold", probabilityThreshold);
if (!deviceTwin.Properties.Desired.Contains("AzureCognitiveServicesEndpoint") || (string.IsNullOrWhiteSpace(deviceTwin.Properties.Desired["AzureCognitiveServicesEndpoint"].value.ToString())))
{
this.logging.LogMessage("DeviceTwin.Properties AzureCognitiveServicesEndpoint setting missing or invalid format", LoggingLevel.Warning);
return;
}
azureCognitiveServicesEndpoint = deviceTwin.Properties.Desired["AzureCognitiveServicesEndpoint"].value.ToString();
configurationInformation.AddString("AzureCognitiveServicesEndpoint", modelPublishedName);
if (!deviceTwin.Properties.Desired.Contains("AzureCognitiveServicesSubscriptionKey") || (string.IsNullOrWhiteSpace(deviceTwin.Properties.Desired["AzureCognitiveServicesSubscriptionKey"].value.ToString())))
{
this.logging.LogMessage("DeviceTwin.Properties AzureCognitiveServicesSubscriptionKey setting missing or invalid format", LoggingLevel.Warning);
return;
}
azureCognitiveServicesSubscriptionKey = deviceTwin.Properties.Desired["AzureCognitiveServicesSubscriptionKey"].value.ToString();
configurationInformation.AddString("AzureCognitiveServicesSubscriptionKey", azureCognitiveServicesSubscriptionKey);
if (!deviceTwin.Properties.Desired.Contains("DebounceTimeout") || !TimeSpan.TryParse(deviceTwin.Properties.Desired["DebounceTimeout"].value.ToString(), out debounceTimeout))
{
this.logging.LogMessage("DeviceTwin.Properties DebounceTimeout setting missing or invalid format", LoggingLevel.Warning);
return;
}
configurationInformation.AddTimeSpan("DebounceTimeout", debounceTimeout);
this.logging.LogEvent("Configuration settings", configurationInformation);
}
catch (Exception ex)
{
this.logging.LogMessage("Azure IoT Hub client GetTwinAsync failed or property missing/invalid" + ex.Message, LoggingLevel.Error);
return;
}
#endregion
try
{
this.customVisionClient = new CustomVisionPredictionClient(new System.Net.Http.DelegatingHandler[] { })
{
ApiKey = this.azureCognitiveServicesSubscriptionKey,
Endpoint = this.azureCognitiveServicesEndpoint,
};
}
catch (Exception ex)
{
this.logging.LogMessage("Azure Cognitive Services Custom Vision Client configuration failed " + ex.Message, LoggingLevel.Error);
return;
}
try
{
this.mediaCapture = new MediaCapture();
this.mediaCapture.InitializeAsync().AsTask().Wait();
}
catch (Exception ex)
{
this.logging.LogMessage("Camera configuration failed " + ex.Message, LoggingLevel.Error);
return;
}
this.displayOffTimer = new Timer(this.TimerCallback, null, Timeout.Infinite, Timeout.Infinite);
#region Wire up interupt handler for image capture request
if (this.interruptPinNumber != 0)
{
try
{
GpioController gpioController = GpioController.GetDefault();
this.interruptGpioPin = gpioController.OpenPin(this.interruptPinNumber);
this.interruptGpioPin.SetDriveMode(GpioPinDriveMode.InputPullUp);
this.interruptGpioPin.ValueChanged += this.InterruptGpioPin_ValueChanged;
this.displayGpioPin = gpioController.OpenPin(this.displayPinNumber);
this.displayGpioPin.SetDriveMode(GpioPinDriveMode.Output);
this.displayGpioPin.Write(GpioPinValue.Low);
}
catch (Exception ex)
{
this.logging.LogMessage("Digital input configuration failed " + ex.Message, LoggingLevel.Error);
return;
}
}
#endregion
#region Wire up command handler for image capture request
try
{
this.azureIoTHubClient.SetMethodHandlerAsync("ImageCapture", this.ImageUpdateHandler, null);
}
catch (Exception ex)
{
this.logging.LogMessage("Azure IoT Hub client ImageCapture SetMethodHandlerAsync failed " + ex.Message, LoggingLevel.Error);
return;
}
#endregion
#region Wire up command handler for device reboot request
try
{
this.azureIoTHubClient.SetMethodHandlerAsync("DeviceReboot", this.DeviceRebootAsync, null);
}
catch (Exception ex)
{
this.logging.LogMessage("Azure IoT Hub client DeviceReboot SetMethodHandlerAsync failed " + ex.Message, LoggingLevel.Error);
return;
}
#endregion
if ((imageUpdateDue != TimeSpan.MinValue) || (imageUpdatePeriod != TimeSpan.MinValue))
{
this.imageUpdatetimer = new Timer(this.ImageUpdateTimerCallback, null, imageUpdateDue, imageUpdatePeriod);
}
this.logging.LogEvent("Application started", startupInformation);
// enable task to continue running in background
this.backgroundTaskDeferral = taskInstance.GetDeferral();
}
private async Task ImageUpdate(bool isCommand)
{
DateTime currentTime = DateTime.UtcNow;
// Just incase - stop code being called while photo already in progress
if (this.cameraBusy)
{
return;
}
this.cameraBusy = true;
this.displayGpioPin.Write(GpioPinValue.High);
// Check that enough time has passed for picture to be taken
if ((currentTime - this.imageLastCapturedAtUtc) < this.debounceTimeout)
{
this.displayOffTimer.Change(this.timerPeriodDetectIlluminated, this.timerPeriodInfinite);
return;
}
this.imageLastCapturedAtUtc = currentTime;
try
{
ImagePrediction imagePrediction;
using (Windows.Storage.Streams.InMemoryRandomAccessStream captureStream = new Windows.Storage.Streams.InMemoryRandomAccessStream())
{
this.mediaCapture.CapturePhotoToStreamAsync(ImageEncodingProperties.CreateJpeg(), captureStream).AsTask().Wait();
captureStream.FlushAsync().AsTask().Wait();
captureStream.Seek(0);
IStorageFile photoFile = await KnownFolders.PicturesLibrary.CreateFileAsync(ImageFilename, CreationCollisionOption.ReplaceExisting);
ImageEncodingProperties imageProperties = ImageEncodingProperties.CreateJpeg();
await this.mediaCapture.CapturePhotoToStorageFileAsync(imageProperties, photoFile);
switch (modelType)
{
case ModelType.Classification:
imagePrediction = await this.customVisionClient.ClassifyImageAsync(this.projectId, this.modelPublishedName, captureStream.AsStreamForRead());
break;
case ModelType.Detection:
imagePrediction = await this.customVisionClient.DetectImageAsync(this.projectId, this.modelPublishedName, captureStream.AsStreamForRead());
break;
default:
throw new ArgumentException("ModelType Invalid");
}
Debug.WriteLine($"Prediction count {imagePrediction.Predictions.Count}");
}
JObject telemetryDataPoint = new JObject();
LoggingFields imageInformation = new LoggingFields();
imageInformation.AddDateTime("TakenAtUTC", currentTime);
imageInformation.AddBoolean("IsCommand", isCommand);
imageInformation.AddDouble("Probability threshold", probabilityThreshold);
imageInformation.AddInt32("Predictions", imagePrediction.Predictions.Count);
// Display and log the results of the prediction
foreach (var prediction in imagePrediction.Predictions)
{
Debug.WriteLine($" Tag:{prediction.TagName} {prediction.Probability}");
imageInformation.AddDouble($"Tag:{prediction.TagName}", prediction.Probability);
}
// Post process the predictions based on the type of model
switch (modelType)
{
case ModelType.Classification:
// Use only the tags above the specified minimum probability
foreach (var prediction in imagePrediction.Predictions)
{
if (prediction.Probability >= probabilityThreshold)
{
// Display and log the individual tag probabilities
Debug.WriteLine($" Tag valid:{prediction.TagName} {prediction.Probability:0.00}");
imageInformation.AddDouble($"Tag valid:{prediction.TagName}", prediction.Probability);
telemetryDataPoint.Add(prediction.TagName, prediction.Probability);
}
}
break;
case ModelType.Detection:
// Group the tags to get the count, include only the predictions above the specified minimum probability
var groupedPredictions = from prediction in imagePrediction.Predictions
where prediction.Probability >= probabilityThreshold
group prediction by new { prediction.TagName }
into newGroup
select new
{
TagName = newGroup.Key.TagName,
Count = newGroup.Count(),
};
// Display and log the agregated predictions
foreach (var prediction in groupedPredictions)
{
Debug.WriteLine($" Tag valid:{prediction.TagName} {prediction.Count}");
imageInformation.AddInt32($"Tag valid:{prediction.TagName}", prediction.Count);
telemetryDataPoint.Add(prediction.TagName, prediction.Count);
}
break;
default:
throw new ArgumentException("ModelType Invalid");
}
this.logging.LogEvent("Captured image processed by Cognitive Services", imageInformation);
try
{
using (Message message = new Message(Encoding.ASCII.GetBytes(JsonConvert.SerializeObject(telemetryDataPoint))))
{
Debug.WriteLine(" {0:HH:mm:ss} AzureIoTHubClient SendEventAsync start", DateTime.UtcNow);
await this.azureIoTHubClient.SendEventAsync(message);
Debug.WriteLine(" {0:HH:mm:ss} AzureIoTHubClient SendEventAsync finish", DateTime.UtcNow);
}
this.logging.LogEvent("SendEventAsync payload", imageInformation, LoggingLevel.Information);
}
catch (Exception ex)
{
imageInformation.AddString("Exception", ex.ToString());
this.logging.LogEvent("SendEventAsync payload", imageInformation, LoggingLevel.Error);
}
}
catch (Exception ex)
{
this.logging.LogMessage("Camera photo or save failed " + ex.Message, LoggingLevel.Error);
}
finally
{
this.displayGpioPin.Write(GpioPinValue.Low);
this.cameraBusy = false;
}
}
public void Run(IBackgroundTaskInstance taskInstance)
{
StorageFolder localFolder = ApplicationData.Current.LocalFolder;
int imageUpdateDueSeconds;
int imageUpdatePeriodSeconds;
this.logging.LogEvent("Application starting");
// Log the Application build, OS version information etc.
LoggingFields startupInformation = new LoggingFields();
startupInformation.AddString("Timezone", TimeZoneSettings.CurrentTimeZoneDisplayName);
startupInformation.AddString("OSVersion", Environment.OSVersion.VersionString);
startupInformation.AddString("MachineName", Environment.MachineName);
// This is from the application manifest
Package package = Package.Current;
PackageId packageId = package.Id;
PackageVersion version = packageId.Version;
startupInformation.AddString("ApplicationVersion", string.Format($"{version.Major}.{version.Minor}.{version.Build}.{version.Revision}"));
try
{
// see if the configuration file is present if not copy minimal sample one from application directory
if (localFolder.TryGetItemAsync(ConfigurationFilename).AsTask().Result == null)
{
StorageFile templateConfigurationfile = Package.Current.InstalledLocation.GetFileAsync(ConfigurationFilename).AsTask().Result;
templateConfigurationfile.CopyAsync(localFolder, ConfigurationFilename).AsTask();
this.logging.LogMessage("JSON configuration file missing, templated created", LoggingLevel.Warning);
return;
}
IConfiguration configuration = new ConfigurationBuilder().AddJsonFile(Path.Combine(localFolder.Path, ConfigurationFilename), false, true).Build();
localImageFilenameLatestFormat = configuration.GetSection("ImageFilenameFormatLatest").Value;
startupInformation.AddString("ImageFilenameLatestFormat", localImageFilenameLatestFormat);
localFolderNameHistoryFormat = configuration.GetSection("FolderNameFormatHistory").Value;
startupInformation.AddString("ContainerNameHistoryFormat", localFolderNameHistoryFormat);
localImageFilenameHistoryFormat = configuration.GetSection("ImageFilenameFormatHistory").Value;
startupInformation.AddString("ImageFilenameHistoryFormat", localImageFilenameHistoryFormat);
imageUpdateDueSeconds = int.Parse(configuration.GetSection("ImageUpdateDueSeconds").Value);
startupInformation.AddInt32("ImageUpdateDueSeconds", imageUpdateDueSeconds);
imageUpdatePeriodSeconds = int.Parse(configuration.GetSection("ImageUpdatePeriodSeconds").Value);
startupInformation.AddInt32("ImageUpdatePeriodSeconds", imageUpdatePeriodSeconds);
}
catch (Exception ex)
{
this.logging.LogMessage("JSON configuration file load or settings retrieval failed " + ex.Message, LoggingLevel.Error);
return;
}
try
{
mediaCapture = new MediaCapture();
mediaCapture.InitializeAsync().AsTask().Wait();
}
catch (Exception ex)
{
this.logging.LogMessage("Camera configuration failed " + ex.Message, LoggingLevel.Error);
return;
}
ImageUpdatetimer = new Timer(ImageUpdateTimerCallback, null, new TimeSpan(0, 0, imageUpdateDueSeconds), new TimeSpan(0, 0, imageUpdatePeriodSeconds));
this.logging.LogEvent("Application started", startupInformation);
//enable task to continue running in background
backgroundTaskDeferral = taskInstance.GetDeferral();
}
/// <summary>
/// Asynchronously attempts to unlock the document file.
/// </summary>
/// <remarks>
/// Algorithm is as of this writing (11/5/2012):
/// 0. Use UTF8 encoding with no BOM.
/// 1. Read header.
/// 2. Compute SHA256 hash of header.
/// 3. Decrypt the rest of the viewModel using header parameters.
/// Relies on:
/// a. MasterSeed.Length == 32
/// Write masterseed to stream
/// b. GenerateKey32(_transformSeed, KeyEncryptionRounds)
/// Create raw32 (CreateRawCompositeKey32)
/// Concatenate all data and Sha256
/// TransformKey(raw32, _transformSeed, numRounds)
/// Init Rijndael:
/// 128 bit (16 byte) blocks
/// ECB mode
/// k = _transformSeed
/// For numRounds:
/// Transform in place raw32[0:15]
/// Transform in place raw32[16:31]
/// c. Write 32 bytes of Key32 to stream
/// d. aesKey = Sha256 the stream
/// e. DecryptStream with aesKey and _encryptionIV
/// 4. Verify the first 32 bytes of the decrypted viewModel match up with
/// "StreamStartBytes" from the header.
/// 5. Read from the decrypted viewModel as a "HashedBlockStream"
///
/// File format at the time of this writing (11/5/2012):
///
/// 4 bytes: SIG1
/// 4 bytes: SIG2
/// Failure to match these constants results in a parse Result.
///
/// 4 bytes: File version
///
/// Header fields:
/// 1 byte: Field ID
/// 2 bytes: Field size (n)
/// n bytes: Data
/// </remarks>
/// <param name="stream">An IRandomAccessStream containing the document to unlock (including the header).</param>
/// <param name="rawKey">The aggregate raw key to use for decrypting the database.</param>
/// <param name="token">A token allowing the parse to be cancelled.</param>
/// <returns>A Task representing the result of the descryiption operation.</returns>
public async Task <KdbxDecryptionResult> DecryptFile(IRandomAccessStream stream, IBuffer rawKey, CancellationToken token)
{
if (HeaderData == null)
{
throw new InvalidOperationException("Cannot decrypt database before ReadHeader has been called.");
}
// Init a SHA256 hash buffer and append the master seed to it
HashAlgorithmProvider sha256 = HashAlgorithmProvider.OpenAlgorithm(HashAlgorithmNames.Sha256);
CryptographicHash hash = sha256.CreateHash();
hash.Append(HeaderData.MasterSeed);
this.rawKey = rawKey;
this.logger.LogEvent("KdbxReader.GotRawKey", EventVerbosity.Verbose);
// Transform the key (this can take a while)
IBuffer transformedKey;
try
{
IKdfEngine kdf = HeaderData.KdfParameters.CreateEngine();
LoggingFields fields = new LoggingFields();
fields.AddString("KdfEngine", kdf.GetType().Name);
this.logger.LogEvent("KdbxReader.StartingKeyTransform", fields, EventVerbosity.Info);
transformedKey = await HeaderData.KdfParameters.CreateEngine().TransformKeyAsync(rawKey, token)
.ConfigureAwait(false);
if (transformedKey == null)
{
throw new OperationCanceledException();
}
this.logger.LogEvent("KdbxReader.KeyTransformSucceeded", EventVerbosity.Info);
}
catch (OperationCanceledException)
{
return(new KdbxDecryptionResult(new ReaderResult(KdbxParserCode.OperationCancelled)));
}
// In KDBX4, after the header is an HMAC-SHA-256 value computed over the header
// allowing validation of header integrity.
IBuffer hmacKey = HmacBlockHandler.DeriveHmacKey(transformedKey, HeaderData.MasterSeed);
HmacBlockHandler hmacHandler = new HmacBlockHandler(hmacKey);
IBuffer expectedMac = null;
if (this.parameters.UseInlineHeaderAuthentication)
{
var algorithm = MacAlgorithmProvider.OpenAlgorithm(MacAlgorithmNames.HmacSha256);
CryptographicHash hmacHash = algorithm.CreateHash(hmacHandler.GetKeyForBlock(UInt64.MaxValue));
DebugHelper.Assert(HeaderData.FullHeader != null);
hmacHash.Append(HeaderData.FullHeader);
expectedMac = hmacHash.GetValueAndReset();
}
// Hash transformed k (with the master seed) to get final cipher k
hash.Append(transformedKey);
IBuffer cipherKey = hash.GetValueAndReset();
this.logger.LogEvent("KdbxReader.GotFinalCipherKey", EventVerbosity.Info);
// Decrypt the document starting from the end of the header
ulong headerLength = HeaderData.FullHeader.Length;
if (this.parameters.UseInlineHeaderAuthentication)
{
// KDBX4 has a hash at the end of the header
headerLength += 32;
}
stream.Seek(headerLength);
if (expectedMac != null)
{
using (DataReader macReader = GetReaderForStream(stream))
{
await macReader.LoadAsync(expectedMac.Length);
IBuffer actualMac = macReader.ReadBuffer(expectedMac.Length);
for (uint i = 0; i < expectedMac.Length; i++)
{
if (expectedMac.GetByte(i) != actualMac.GetByte(i))
{
this.logger.LogEvent("KdbxReader.HmacFailure", EventVerbosity.Critical);
return(new KdbxDecryptionResult(new ReaderResult(KdbxParserCode.CouldNotDecrypt)));
}
}
macReader.DetachStream();
}
}
IBuffer cipherText;
try
{
cipherText = await GetCipherText(stream, hmacHandler);
}
catch (FormatException ex)
{
this.logger.LogEvent("KdbxReader.DataIntegrityFailure", ex.ToLoggingFields(), EventVerbosity.Critical);
return(new KdbxDecryptionResult(new ReaderResult(KdbxParserCode.DataIntegrityProblem, ex)));
}
IBuffer decryptedFile = DecryptDatabaseData(cipherText, cipherKey);
if (decryptedFile == null)
{
this.logger.LogEvent("KdbxReader.DecryptionFailure", EventVerbosity.Critical);
return(new KdbxDecryptionResult(new ReaderResult(KdbxParserCode.CouldNotDecrypt)));
}
this.logger.LogEvent("KdbxReader.DecryptionSucceeded", EventVerbosity.Info);
// Verify first 32 bytes of the clear data; if StreamStartBytes wasn't set
// (e.g. due to KDBX4), nothing happens here.
for (uint i = 0; i < (HeaderData.StreamStartBytes?.Length ?? 0); i++)
{
byte actualByte = decryptedFile.GetByte(i);
byte expectedByte = HeaderData.StreamStartBytes.GetByte(i);
if (actualByte != expectedByte)
{
this.logger.LogEvent("KdbxReader.PlaintextValidationFailure", EventVerbosity.Critical);
return(new KdbxDecryptionResult(new ReaderResult(KdbxParserCode.FirstBytesMismatch)));
}
}
this.logger.LogEvent("KdbxReader.PlaintextValidationSucceeded", EventVerbosity.Verbose);
IBuffer plainText = await UnhashAndInflate(decryptedFile);
if (plainText == null)
{
return(new KdbxDecryptionResult(new ReaderResult(KdbxParserCode.CouldNotInflate)));
}
// Update HeaderData with info from the inner header, if relevant
if (this.parameters.UseInnerHeader)
{
using (IRandomAccessStream plainTextStream = plainText.AsStream().AsRandomAccessStream())
{
using (DataReader reader = GetReaderForStream(plainTextStream))
{
ReaderResult innerHeaderResult = await ReadInnerHeader(reader, HeaderData);
if (innerHeaderResult != ReaderResult.Success)
{
LoggingFields fields = new LoggingFields();
fields.AddInt32("Code", (int)innerHeaderResult.Code);
this.logger.LogEvent("KdbxReader.InnerHeaderReadFailure", fields, EventVerbosity.Critical);
return(new KdbxDecryptionResult(innerHeaderResult));
}
// Update plainText to point to the remainder of the buffer
uint bytesRemaining = plainText.Length - (uint)plainTextStream.Position;
await reader.LoadAsync(bytesRemaining);
plainText = reader.ReadBuffer(bytesRemaining);
}
}
}
XDocument finalTree = null;
try
{
finalTree = XDocument.Load(plainText.AsStream());
}
catch (XmlException)
{
return(null);
}
if (finalTree == null)
{
return(new KdbxDecryptionResult(new ReaderResult(KdbxParserCode.MalformedXml)));
}
try
{
KdbxDocument parsedDocument = await Task.Run(() => new KdbxDocument(finalTree.Root, HeaderData.ProtectedBinaries, HeaderData.GenerateRng(), this.parameters));
// Validate the final parsed header hash before returning
if (this.parameters.UseXmlHeaderAuthentication &&
!String.IsNullOrEmpty(parsedDocument.Metadata.HeaderHash) &&
parsedDocument.Metadata.HeaderHash != HeaderData.HeaderHash)
{
return(new KdbxDecryptionResult(new ReaderResult(KdbxParserCode.BadHeaderHash)));
}
return(new KdbxDecryptionResult(this.parameters, parsedDocument, this.rawKey));
}
catch (KdbxParseException e)
{
return(new KdbxDecryptionResult(e.Error));
}
}
private async void InterruptGpioPin_ValueChanged(GpioPin sender, GpioPinValueChangedEventArgs args)
{
DateTime currentTime = DateTime.UtcNow;
Debug.WriteLine($"Digital Input Interrupt {sender.PinNumber} triggered {args.Edge}");
if (args.Edge != this.interruptTriggerOn)
{
return;
}
// Check that enough time has passed for picture to be taken
if ((currentTime - this.imageLastCapturedAtUtc) < this.debounceTimeout)
{
this.displayGpioPin.Write(GpioPinValue.High);
this.displayOffTimer.Change(this.timerPeriodDetectIlluminated, this.timerPeriodInfinite);
return;
}
this.imageLastCapturedAtUtc = currentTime;
// Just incase - stop code being called while photo already in progress
if (this.cameraBusy)
{
this.displayGpioPin.Write(GpioPinValue.High);
this.displayOffTimer.Change(this.timerPeriodDetectIlluminated, this.timerPeriodInfinite);
return;
}
this.cameraBusy = true;
try
{
using (Windows.Storage.Streams.InMemoryRandomAccessStream captureStream = new Windows.Storage.Streams.InMemoryRandomAccessStream())
{
this.mediaCapture.CapturePhotoToStreamAsync(ImageEncodingProperties.CreateJpeg(), captureStream).AsTask().Wait();
captureStream.FlushAsync().AsTask().Wait();
captureStream.Seek(0);
IStorageFile photoFile = await KnownFolders.PicturesLibrary.CreateFileAsync(ImageFilename, CreationCollisionOption.ReplaceExisting);
ImageEncodingProperties imageProperties = ImageEncodingProperties.CreateJpeg();
await this.mediaCapture.CapturePhotoToStorageFileAsync(imageProperties, photoFile);
ImagePrediction imagePrediction = await this.customVisionClient.ClassifyImageAsync(this.projectId, this.publishedName, captureStream.AsStreamForRead());
Debug.WriteLine($"Prediction count {imagePrediction.Predictions.Count}");
LoggingFields imageInformation = new LoggingFields();
imageInformation.AddDateTime("TakenAtUTC", currentTime);
imageInformation.AddInt32("Pin", sender.PinNumber);
imageInformation.AddInt32("Predictions", imagePrediction.Predictions.Count);
foreach (var prediction in imagePrediction.Predictions)
{
Debug.WriteLine($" Tag:{prediction.TagName} {prediction.Probability}");
imageInformation.AddDouble($"Tag:{prediction.TagName}", prediction.Probability);
}
this.logging.LogEvent("Captured image processed by Cognitive Services", imageInformation);
}
}
catch (Exception ex)
{
this.logging.LogMessage("Camera photo or save failed " + ex.Message, LoggingLevel.Error);
}
finally
{
this.cameraBusy = false;
}
}
public void Run(IBackgroundTaskInstance taskInstance)
{
StorageFolder localFolder = ApplicationData.Current.LocalFolder;
this.logging.LogEvent("Application starting");
// Log the Application build, OS version information etc.
LoggingFields startupInformation = new LoggingFields();
startupInformation.AddString("Timezone", TimeZoneSettings.CurrentTimeZoneDisplayName);
startupInformation.AddString("OSVersion", Environment.OSVersion.VersionString);
startupInformation.AddString("MachineName", Environment.MachineName);
// This is from the application manifest
Package package = Package.Current;
PackageId packageId = package.Id;
PackageVersion version = packageId.Version;
startupInformation.AddString("ApplicationVersion", string.Format($"{version.Major}.{version.Minor}.{version.Build}.{version.Revision}"));
try
{
// see if the configuration file is present if not copy minimal sample one from application directory
if (localFolder.TryGetItemAsync(ConfigurationFilename).AsTask().Result == null)
{
StorageFile templateConfigurationfile = Package.Current.InstalledLocation.GetFileAsync(ConfigurationFilename).AsTask().Result;
templateConfigurationfile.CopyAsync(localFolder, ConfigurationFilename).AsTask();
}
IConfiguration configuration = new ConfigurationBuilder().AddJsonFile(Path.Combine(localFolder.Path, ConfigurationFilename), false, true).Build();
this.azureCognitiveServicesEndpoint = configuration.GetSection("AzureCognitiveServicesEndpoint").Value;
startupInformation.AddString("AzureCognitiveServicesEndpoint", this.azureCognitiveServicesEndpoint);
this.azureCognitiveServicesSubscriptionKey = configuration.GetSection("AzureCognitiveServicesSubscriptionKey").Value;
startupInformation.AddString("AzureCognitiveServicesSubscriptionKey", this.azureCognitiveServicesSubscriptionKey);
this.interruptPinNumber = int.Parse(configuration.GetSection("InterruptPinNumber").Value);
startupInformation.AddInt32("Interrupt pin", this.interruptPinNumber);
this.interruptTriggerOn = (GpioPinEdge)Enum.Parse(typeof(GpioPinEdge), configuration.GetSection("interruptTriggerOn").Value);
startupInformation.AddString("Interrupt Trigger on", this.interruptTriggerOn.ToString());
this.displayPinNumber = int.Parse(configuration.GetSection("DisplayPinNumber").Value);
startupInformation.AddInt32("Display pin", this.interruptPinNumber);
this.debounceTimeout = TimeSpan.Parse(configuration.GetSection("debounceTimeout").Value);
startupInformation.AddTimeSpan("Debounce timeout", this.debounceTimeout);
}
catch (Exception ex)
{
this.logging.LogMessage("JSON configuration file load or settings retrieval failed " + ex.Message, LoggingLevel.Error);
return;
}
try
{
this.faceClient = new FaceClient(
new Microsoft.Azure.CognitiveServices.Vision.Face.ApiKeyServiceClientCredentials(this.azureCognitiveServicesSubscriptionKey),
new System.Net.Http.DelegatingHandler[] { })
{
Endpoint = this.azureCognitiveServicesEndpoint,
};
}
catch (Exception ex)
{
this.logging.LogMessage("Azure Cognitive Services Face Client configuration failed " + ex.Message, LoggingLevel.Error);
return;
}
try
{
this.mediaCapture = new MediaCapture();
this.mediaCapture.InitializeAsync().AsTask().Wait();
}
catch (Exception ex)
{
this.logging.LogMessage("Camera configuration failed " + ex.Message, LoggingLevel.Error);
return;
}
this.displayOffTimer = new Timer(this.TimerCallback, null, Timeout.Infinite, Timeout.Infinite);
try
{
GpioController gpioController = GpioController.GetDefault();
this.interruptGpioPin = gpioController.OpenPin(this.interruptPinNumber);
this.interruptGpioPin.SetDriveMode(GpioPinDriveMode.InputPullUp);
this.interruptGpioPin.ValueChanged += this.InterruptGpioPin_ValueChanged;
this.displayGpioPin = gpioController.OpenPin(this.displayPinNumber);
this.displayGpioPin.SetDriveMode(GpioPinDriveMode.Output);
this.displayGpioPin.Write(GpioPinValue.Low);
}
catch (Exception ex)
{
this.logging.LogMessage("Digital input configuration failed " + ex.Message, LoggingLevel.Error);
return;
}
this.logging.LogEvent("Application started", startupInformation);
// enable task to continue running in background
this.backgroundTaskDeferral = taskInstance.GetDeferral();
}
private async void InterruptGpioPin_ValueChanged(GpioPin sender, GpioPinValueChangedEventArgs args)
{
DateTime currentTime = DateTime.UtcNow;
Debug.WriteLine($"Digital Input Interrupt {sender.PinNumber} triggered {args.Edge}");
if (args.Edge != this.interruptTriggerOn)
{
return;
}
// Check that enough time has passed for picture to be taken
if ((currentTime - this.imageLastCapturedAtUtc) < this.debounceTimeout)
{
this.displayGpioPin.Write(GpioPinValue.High);
this.displayOffTimer.Change(this.timerPeriodDetectIlluminated, this.timerPeriodInfinite);
return;
}
this.imageLastCapturedAtUtc = currentTime;
// Just incase - stop code being called while photo already in progress
if (this.cameraBusy)
{
this.displayGpioPin.Write(GpioPinValue.High);
this.displayOffTimer.Change(this.timerPeriodDetectIlluminated, this.timerPeriodInfinite);
return;
}
this.cameraBusy = true;
try
{
using (Windows.Storage.Streams.InMemoryRandomAccessStream captureStream = new Windows.Storage.Streams.InMemoryRandomAccessStream())
{
this.mediaCapture.CapturePhotoToStreamAsync(ImageEncodingProperties.CreateJpeg(), captureStream).AsTask().Wait();
captureStream.FlushAsync().AsTask().Wait();
captureStream.Seek(0);
IStorageFile photoFile = await KnownFolders.PicturesLibrary.CreateFileAsync(ImageFilename, CreationCollisionOption.ReplaceExisting);
ImageEncodingProperties imageProperties = ImageEncodingProperties.CreateJpeg();
await this.mediaCapture.CapturePhotoToStorageFileAsync(imageProperties, photoFile);
IList <FaceAttributeType> returnfaceAttributes = new List <FaceAttributeType>();
returnfaceAttributes.Add(FaceAttributeType.Gender);
returnfaceAttributes.Add(FaceAttributeType.Age);
IList <DetectedFace> detectedFaces = await this.faceClient.Face.DetectWithStreamAsync(captureStream.AsStreamForRead(), returnFaceAttributes : returnfaceAttributes);
Debug.WriteLine($"Count {detectedFaces.Count}");
if (detectedFaces.Count > 0)
{
this.displayGpioPin.Write(GpioPinValue.High);
// Start the timer to turn the LED off
this.displayOffTimer.Change(this.timerPeriodFaceIlluminated, this.timerPeriodInfinite);
}
LoggingFields imageInformation = new LoggingFields();
imageInformation.AddDateTime("TakenAtUTC", currentTime);
imageInformation.AddInt32("Pin", sender.PinNumber);
imageInformation.AddInt32("Faces", detectedFaces.Count);
foreach (DetectedFace detectedFace in detectedFaces)
{
Debug.WriteLine("Face");
if (detectedFace.FaceId.HasValue)
{
imageInformation.AddGuid("FaceId", detectedFace.FaceId.Value);
Debug.WriteLine($" Id:{detectedFace.FaceId.Value}");
}
imageInformation.AddInt32("Left", detectedFace.FaceRectangle.Left);
imageInformation.AddInt32("Width", detectedFace.FaceRectangle.Width);
imageInformation.AddInt32("Top", detectedFace.FaceRectangle.Top);
imageInformation.AddInt32("Height", detectedFace.FaceRectangle.Height);
Debug.WriteLine($" L:{detectedFace.FaceRectangle.Left} W:{detectedFace.FaceRectangle.Width} T:{detectedFace.FaceRectangle.Top} H:{detectedFace.FaceRectangle.Height}");
if (detectedFace.FaceAttributes != null)
{
if (detectedFace.FaceAttributes.Gender.HasValue)
{
imageInformation.AddString("Gender", detectedFace.FaceAttributes.Gender.Value.ToString());
Debug.WriteLine($" Gender:{detectedFace.FaceAttributes.Gender.ToString()}");
}
if (detectedFace.FaceAttributes.Age.HasValue)
{
imageInformation.AddDouble("Age", detectedFace.FaceAttributes.Age.Value);
Debug.WriteLine($" Age:{detectedFace.FaceAttributes.Age.Value.ToString("F1")}");
}
}
}
this.logging.LogEvent("Captured image processed by Cognitive Services", imageInformation);
}
}
catch (Exception ex)
{
this.logging.LogMessage("Camera photo or save failed " + ex.Message, LoggingLevel.Error);
}
finally
{
this.cameraBusy = false;
}
}
private async Task PayloadCommaSeparatedValues(DeviceClient azureIoTHubClient, Rfm9XDevice.OnDataReceivedEventArgs e)
{
JObject telemetryDataPoint = new JObject();
LoggingFields processLoggingFields = new LoggingFields();
char[] sensorReadingSeparators = { ',' };
char[] sensorIdAndValueSeparators = { ' ' };
processLoggingFields.AddString("PacketSNR", e.PacketSnr.ToString("F1"));
telemetryDataPoint.Add("PacketSNR", e.PacketSnr.ToString("F1"));
processLoggingFields.AddInt32("PacketRSSI", e.PacketRssi);
telemetryDataPoint.Add("PacketRSSI", e.PacketRssi);
processLoggingFields.AddInt32("RSSI", e.Rssi);
telemetryDataPoint.Add("RSSI", e.Rssi);
string addressBcdText = BitConverter.ToString(e.Address);
processLoggingFields.AddInt32("DeviceAddressLength", e.Address.Length);
processLoggingFields.AddString("DeviceAddressBCD", addressBcdText);
telemetryDataPoint.Add("DeviceAddressBCD", addressBcdText);
string messageText;
try
{
messageText = UTF8Encoding.UTF8.GetString(e.Data);
processLoggingFields.AddString("MessageText", messageText);
}
catch (Exception)
{
this.logging.LogEvent("PayloadProcess failure converting payload to text", processLoggingFields, LoggingLevel.Warning);
return;
}
// Chop up the CSV text
string[] sensorReadings = messageText.Split(sensorReadingSeparators, StringSplitOptions.RemoveEmptyEntries);
if (sensorReadings.Length < 1)
{
this.logging.LogEvent("PayloadProcess payload contains no sensor readings", processLoggingFields, LoggingLevel.Warning);
return;
}
// Chop up each sensor read into an ID & value
foreach (string sensorReading in sensorReadings)
{
string[] sensorIdAndValue = sensorReading.Split(sensorIdAndValueSeparators, StringSplitOptions.RemoveEmptyEntries);
// Check that there is an id & value
if (sensorIdAndValue.Length != 2)
{
this.logging.LogEvent("PayloadProcess payload invalid format", processLoggingFields, LoggingLevel.Warning);
return;
}
string sensorId = sensorIdAndValue[0].ToLower();
string value = sensorIdAndValue[1];
// Construct the sensor ID from SensordeviceID & Value, mainly intended for Azure IOT Central support
if (this.applicationSettings.SensorIDIsDeviceIDSensorID)
{
sensorId = string.Concat(addressBcdText, sensorId);
}
try
{
telemetryDataPoint.Add(sensorId, value);
processLoggingFields.AddString(sensorId, value);
Debug.WriteLine($" SensorID {sensorId} Value {value}");
}
catch (Exception ex)
{
processLoggingFields.AddString("Exception", ex.ToString());
this.logging.LogEvent("PayloadProcess sensor reading invalid JSON format", processLoggingFields, LoggingLevel.Warning);
return;
}
}
try
{
using (Message message = new Message(Encoding.ASCII.GetBytes(JsonConvert.SerializeObject(telemetryDataPoint))))
{
Debug.WriteLine(" {0:HH:mm:ss} AzureIoTHubClient SendEventAsync start", DateTime.UtcNow);
await this.azureIoTHubClient.SendEventAsync(message);
Debug.WriteLine(" {0:HH:mm:ss} AzureIoTHubClient SendEventAsync finish", DateTime.UtcNow);
}
this.logging.LogEvent("SendEventAsync JSON payload", processLoggingFields, LoggingLevel.Information);
}
catch (Exception ex)
{
processLoggingFields.AddString("Exception", ex.ToString());
this.logging.LogEvent("SendEventAsync JSON payload", processLoggingFields, LoggingLevel.Error);
}
}
async void IMessageHandler.Rfm9XOnReceive(Rfm9XDevice.OnDataReceivedEventArgs e)
{
LoggingFields processReceiveLoggingFields = new LoggingFields();
char[] sensorReadingSeparators = { ',' };
char[] sensorIdAndValueSeparators = { ' ' };
processReceiveLoggingFields.AddString("PacketSNR", e.PacketSnr.ToString("F1"));
processReceiveLoggingFields.AddInt32("PacketRSSI", e.PacketRssi);
processReceiveLoggingFields.AddInt32("RSSI", e.Rssi);
string addressBcdText = BitConverter.ToString(e.Address);
processReceiveLoggingFields.AddInt32("DeviceAddressLength", e.Address.Length);
processReceiveLoggingFields.AddString("DeviceAddressBCD", addressBcdText);
string messageText;
try
{
messageText = UTF8Encoding.UTF8.GetString(e.Data);
processReceiveLoggingFields.AddString("MessageText", messageText);
}
catch (Exception ex)
{
processReceiveLoggingFields.AddString("Exception", ex.ToString());
this.Logging.LogEvent("PayloadProcess failure converting payload to text", processReceiveLoggingFields, LoggingLevel.Warning);
return;
}
// Chop up the CSV text
string[] sensorReadings = messageText.Split(sensorReadingSeparators, StringSplitOptions.RemoveEmptyEntries);
if (sensorReadings.Length < 1)
{
this.Logging.LogEvent("PayloadProcess payload contains no sensor readings", processReceiveLoggingFields, LoggingLevel.Warning);
return;
}
JObject payloadJObject = new JObject();
JObject feeds = new JObject();
// Chop up each sensor read into an ID & value
foreach (string sensorReading in sensorReadings)
{
string[] sensorIdAndValue = sensorReading.Split(sensorIdAndValueSeparators, StringSplitOptions.RemoveEmptyEntries);
// Check that there is an id & value
if (sensorIdAndValue.Length != 2)
{
this.Logging.LogEvent("PayloadProcess payload invalid format", processReceiveLoggingFields, LoggingLevel.Warning);
return;
}
string sensorId = string.Concat(addressBcdText, sensorIdAndValue[0]);
string value = sensorIdAndValue[1];
feeds.Add(sensorId.ToLower(), value);
}
payloadJObject.Add("feeds", feeds);
string topic = $"{MqttClient.Options.Credentials.Username}/groups/{PlatformSpecificConfiguration}";
try
{
var message = new MqttApplicationMessageBuilder()
.WithTopic(topic)
.WithPayload(JsonConvert.SerializeObject(payloadJObject))
.WithAtLeastOnceQoS()
.Build();
Debug.WriteLine(" {0:HH:mm:ss} MQTT Client PublishAsync start", DateTime.UtcNow);
await MqttClient.PublishAsync(message);
Debug.WriteLine(" {0:HH:mm:ss} MQTT Client PublishAsync finish", DateTime.UtcNow);
this.Logging.LogEvent("PublishAsync Adafruit payload", processReceiveLoggingFields, LoggingLevel.Information);
}
catch (Exception ex)
{
processReceiveLoggingFields.AddString("Exception", ex.ToString());
this.Logging.LogEvent("PublishAsync Adafruit payload", processReceiveLoggingFields, LoggingLevel.Error);
}
}
public void Run(IBackgroundTaskInstance taskInstance)
{
StorageFolder localFolder = ApplicationData.Current.LocalFolder;
this.logging.LogEvent("Application starting");
// Log the Application build, OS version information etc.
LoggingFields startupInformation = new LoggingFields();
startupInformation.AddString("Timezone", TimeZoneSettings.CurrentTimeZoneDisplayName);
startupInformation.AddString("OSVersion", Environment.OSVersion.VersionString);
startupInformation.AddString("MachineName", Environment.MachineName);
// This is from the application manifest
Package package = Package.Current;
PackageId packageId = package.Id;
PackageVersion version = packageId.Version;
startupInformation.AddString("ApplicationVersion", string.Format($"{version.Major}.{version.Minor}.{version.Build}.{version.Revision}"));
// ethernet mac address
this.deviceMacAddress = NetworkInterface.GetAllNetworkInterfaces()
.Where(i => i.NetworkInterfaceType.ToString().ToLower().Contains("ethernet"))
.FirstOrDefault()
?.GetPhysicalAddress().ToString();
// remove unsupported charachers from MacAddress
this.deviceMacAddress = this.deviceMacAddress.Replace("-", string.Empty).Replace(" ", string.Empty).Replace(":", string.Empty);
startupInformation.AddString("MacAddress", this.deviceMacAddress);
try
{
// see if the configuration file is present if not copy minimal sample one from application directory
if (localFolder.TryGetItemAsync(ConfigurationFilename).AsTask().Result == null)
{
StorageFile templateConfigurationfile = Package.Current.InstalledLocation.GetFileAsync(ConfigurationFilename).AsTask().Result;
templateConfigurationfile.CopyAsync(localFolder, ConfigurationFilename).AsTask();
this.logging.LogMessage("JSON configuration file missing, templated created", LoggingLevel.Warning);
return;
}
IConfiguration configuration = new ConfigurationBuilder().AddJsonFile(Path.Combine(localFolder.Path, ConfigurationFilename), false, true).Build();
this.azureStorageConnectionString = configuration.GetSection("AzureStorageConnectionString").Value;
startupInformation.AddString("AzureStorageConnectionString", this.azureStorageConnectionString);
this.azureStorageContainerNameLatestFormat = configuration.GetSection("AzureContainerNameFormatLatest").Value;
startupInformation.AddString("ContainerNameLatestFormat", this.azureStorageContainerNameLatestFormat);
this.azureStorageimageFilenameLatestFormat = configuration.GetSection("AzureImageFilenameFormatLatest").Value;
startupInformation.AddString("ImageFilenameLatestFormat", this.azureStorageimageFilenameLatestFormat);
this.azureStorageContainerNameHistoryFormat = configuration.GetSection("AzureContainerNameFormatHistory").Value;
startupInformation.AddString("ContainerNameHistoryFormat", this.azureStorageContainerNameHistoryFormat);
this.azureStorageImageFilenameHistoryFormat = configuration.GetSection("AzureImageFilenameFormatHistory").Value;
startupInformation.AddString("ImageFilenameHistoryFormat", this.azureStorageImageFilenameHistoryFormat);
this.interruptPinNumber = int.Parse(configuration.GetSection("InterruptPinNumber").Value);
startupInformation.AddInt32("Interrupt pin", this.interruptPinNumber);
this.interruptTriggerOn = (GpioPinEdge)Enum.Parse(typeof(GpioPinEdge), configuration.GetSection("interruptTriggerOn").Value);
startupInformation.AddString("Interrupt Trigger on", this.interruptTriggerOn.ToString());
this.debounceTimeout = TimeSpan.Parse(configuration.GetSection("debounceTimeout").Value);
startupInformation.AddTimeSpan("Debounce timeout", this.debounceTimeout);
}
catch (Exception ex)
{
this.logging.LogMessage("JSON configuration file load or settings retrieval failed " + ex.Message, LoggingLevel.Error);
return;
}
try
{
this.mediaCapture = new MediaCapture();
this.mediaCapture.InitializeAsync().AsTask().Wait();
}
catch (Exception ex)
{
this.logging.LogMessage("Camera configuration failed " + ex.Message, LoggingLevel.Error);
return;
}
try
{
GpioController gpioController = GpioController.GetDefault();
this.interruptGpioPin = gpioController.OpenPin(this.interruptPinNumber);
this.interruptGpioPin.SetDriveMode(GpioPinDriveMode.InputPullUp);
this.interruptGpioPin.ValueChanged += this.InterruptGpioPin_ValueChanged;
}
catch (Exception ex)
{
this.logging.LogMessage("Digital input configuration failed " + ex.Message, LoggingLevel.Error);
return;
}
this.logging.LogEvent("Application started", startupInformation);
// enable task to continue running in background
this.backgroundTaskDeferral = taskInstance.GetDeferral();
}
private async Task <MethodResponse> DevicePushAsync(MethodRequest methodRequest, object userContext)
{
LoggingFields pushLoggingInfo = new LoggingFields();
this.logging.LogEvent("Push BCD initiated");
try
{
// Initially use a dynamac maybe use a decorated class in future +flexibility -performance
dynamic json = JValue.Parse(methodRequest.DataAsJson);
// Prepare the server address bytes for the message header and validate length
byte[] serverAddressBytes = Encoding.UTF8.GetBytes(this.applicationSettings.RF24Address);
pushLoggingInfo.AddInt32("serverAddressBytes Length", serverAddressBytes.Length);
if (serverAddressBytes.Length > MessageAddressLengthMaximum)
{
this.logging.LogEvent("DevicePushBcdAsync failed server address bytes Length", pushLoggingInfo, LoggingLevel.Error);
return(new MethodResponse(400));
}
// Convert the device address from the JSON payload to bytes and validate length
string deviceAddressBcd = json.DeviceAddress;
pushLoggingInfo.AddString("DeviceAddressBCD", deviceAddressBcd);
byte[] deviceAddressBytes = deviceAddressBcd.Split('-').Select(x => byte.Parse(x, NumberStyles.HexNumber)).ToArray();
pushLoggingInfo.AddInt32("DeviceAddressBytes Length", deviceAddressBytes.Length);
if ((deviceAddressBytes.Length <) || (deviceAddressBytes.Length >))
{
this.logging.LogEvent("DevicePushAsync failed device address bytes length", pushLoggingInfo, LoggingLevel.Error);
return(new MethodResponse(414));
}
string messagedBcd = json.DevicePayload;
pushLoggingInfo.AddString("MessageBCD", messagedBcd);
byte[] messageBytes = messagedBcd.Split('-').Select(x => byte.Parse(x, NumberStyles.HexNumber)).ToArray();
pushLoggingInfo.AddInt32("MessageBytesLength", messageBytes.Length);
Debug.WriteLine($"BondDeviceAsync DeviceAddress:{deviceAddressBcd} Payload:{messagedBcd} ServerAddress:{serverAddressBytes}");
int payloadLength = MessageHeaderLength + deviceAddressBytes.Length + messageBytes.Length;
pushLoggingInfo.AddInt32("PayloadLength", payloadLength);
if (payloadLength < MessagePayloadLengthMinimum || (payloadLength > MessagePayloadLengthMaximum))
{
this.logging.LogEvent("DevicePushBcdAsync failed payload Length", pushLoggingInfo, LoggingLevel.Error);
return(new MethodResponse(400));
}
// Assemble payload to send to device
byte[] payloadBytes = new byte[payloadLength];
payloadBytes[0] = (byte)(((byte)MessagePayloadType.DeviceIdPlusBinaryPayload << 4) | deviceAddressBytes.Length);
Array.Copy(serverAddressBytes, 0, payloadBytes, MessageHeaderLength, serverAddressBytes.Length);
Array.Copy(messageBytes, 0, payloadBytes, MessageHeaderLength + serverAddressBytes.Length, messageBytes.Length);
this.rf24.SendTo(deviceAddressBytes, payloadBytes);
this.logging.LogEvent("Device Push BCD data", pushLoggingInfo, LoggingLevel.Information);
}
catch (Exception ex)
{
pushLoggingInfo.AddString("Exception", ex.ToString());
this.logging.LogEvent("DevicePushAsync failed exception", pushLoggingInfo, LoggingLevel.Error);
return(new MethodResponse(400));
}
return(new MethodResponse(200));
}