private async void OnDeviceAdded(DeviceWatcher watcher, DeviceInformation deviceInfoAdded)
{
// Since we have the collection databound to a UI element, we need to update the collection on the UI thread.
await Dispatcher.RunAsync(CoreDispatcherPriority.Low, () =>
{
DeviceInformationDisplay deviceInfoDisplay = new DeviceInformationDisplay(deviceInfoAdded);
if (!ResultCollection.Any(p => p.Name == deviceInfoAdded.Name))
{
ResultCollection.Add(deviceInfoDisplay);
Debug.WriteLine("{0} devices found.", ResultCollection.Count);
}
CheckPairing(deviceInfoDisplay);
});
}
private async void PostBeaconData(DeviceInformationDisplay deviceInfoDisplay)
{
if (deviceInfoDisplay.Name.StartsWith("XY"))
{
if (null != _devClient)
{
try
{
string jsonText = deviceInfoDisplay.ToJson();
Message msg = new Message(Encoding.UTF8.GetBytes(jsonText));
await _devClient.SendEventAsync(msg);
Debug.WriteLine("Message Sent: {0}", jsonText);
}
catch (Exception ex)
{
Debug.WriteLine("Exception when sending message:" + ex.Message);
}
}
}
}
private async void CheckPairing(DeviceInformationDisplay deviceInfoDisplay)
{
Debug.WriteLine("{0}- '{1}' Signal Strength - {2}", DateTime.Now.Ticks, deviceInfoDisplay.Name, deviceInfoDisplay.SignalStrength);
if (!deviceInfoDisplay.IsPairing)
{
// Pair device only if it is close
if (deviceInfoDisplay.Name.StartsWith("XY") &&
!deviceInfoDisplay.IsPaired &&
(deviceInfoDisplay.SignalStrength > -50))
{
// Set a flag on the device so that once it begins to pair, it doesn't constantly try to pair
deviceInfoDisplay.IsPairing = true;
// This is just basic pairing (No PIN or confirmation)
DevicePairingKinds ceremonies = DevicePairingKinds.ConfirmOnly;
DevicePairingProtectionLevel protectionLevel = DevicePairingProtectionLevel.Default;
DeviceInformationCustomPairing customPairing = deviceInfoDisplay.DeviceInformation.Pairing.Custom;
// In the cases where more complex pairing is required, user interaction happens in the Pairing Requested event
customPairing.PairingRequested += OnPairingRequested;
DevicePairingResult result = await customPairing.PairAsync(ceremonies, protectionLevel);
customPairing.PairingRequested -= OnPairingRequested;
Debug.WriteLine("{0} pair result - {1}", deviceInfoDisplay.Name, result.Status);
// If the pair was successful, act based on the beacon ID
if (DevicePairingResultStatus.Paired == result.Status)
{
var stream = await _speechSynth.SynthesizeTextToStreamAsync("Paired beacon ID " + deviceInfoDisplay.Name);
// Use a dispatcher to play the audio
var ignored = Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
//Set the souce of the MediaElement to the SpeechSynthesisStream
_audio.SetSource(stream, stream.ContentType);
//Play the stream
_audio.Play();
});
}
deviceInfoDisplay.IsPairing = false;
}
else if (deviceInfoDisplay.Name.StartsWith("XY") &&
deviceInfoDisplay.IsPaired &&
(deviceInfoDisplay.SignalStrength < -50))
{
// Set a flag on the device so that once it begins to pair, it doesn't constantly try to unpair
deviceInfoDisplay.IsPairing = true;
// Unpair the beacon
DeviceUnpairingResult result = await deviceInfoDisplay.DeviceInformation.Pairing.UnpairAsync();
Debug.WriteLine("{0} unpair result - {1}", deviceInfoDisplay.Name, result.Status);
deviceInfoDisplay.IsPairing = false;
}
}
}
