/// <summary>
/// Tries to read proximity beacon data from the given advertisementReceivedEventArgs.
/// </summary>
/// <param name="advertisementReceivedEventArgs">The bluetooth advertisement message from which to read a proximity beacon message from.</param>
/// <param name="beacon">The resulting proximity beacon data that can be read from the advertisement.</param>
/// <param name="requestedTypes">The type(s) of proximity beacons to look for.</param>
/// <returns>True when proximity beacon data can be read from the advertisement.</returns>
public static bool TryReadProximityBeacon(BluetoothLEAdvertisementReceivedEventArgs advertisementReceivedEventArgs,
out ProximityBeacon beacon, params ProximityBeaconType[] requestedTypes)
{
if (requestedTypes.Count() == 1 && requestedTypes[0] == ProximityBeaconType.Unknown)
{
throw new ArgumentException($"Proximity Beacon Type {nameof(ProximityBeaconType.Unknown)} cannot be parsed!");
}
bool result = false;
beacon = null;
foreach (var parser in AvailableParsers.Where(a => requestedTypes.Contains(a.Type)))
{
if (parser.CanParseAdvertisement(advertisementReceivedEventArgs))
{
try
{
beacon = parser.Parse(advertisementReceivedEventArgs);
result = true;
break;
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message);
}
}
else
continue;
}
return result;
}
private async void Watcher_Received(BluetoothLEAdvertisementWatcher sender, BluetoothLEAdvertisementReceivedEventArgs args)
{
ProximityBeacon beacon = null;
if (ProximityBeaconReader.TryReadProximityBeacon(args, out beacon, ProximityBeaconType.IBeacon))
{
await this.Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>
{
if (beacon.BeaconType == ProximityBeaconType.IBeacon)
{
var iBeacon = beacon as IBeacon;
Debug.WriteLine($"RSSI: {args.RawSignalStrengthInDBm}, distance: {ProximityBeaconHelper.CalculateDistance(iBeacon.MeasuredPower, args.RawSignalStrengthInDBm)}");
// Display these information on the list
ReceivedAdvertisementListBox.Items.Add(
$"Beacon: UUID={iBeacon.UUID}\n\tMajor={iBeacon.Major}\n\tMinor={iBeacon.Minor}\n\trssi={args.RawSignalStrengthInDBm}\n\ttimestamp={args.Timestamp.ToString("HH\\:mm\\:ss\\.fff")}\n\tAddress:{args.BluetoothAddress}");
}
});
}
}
