public void Discover(Func<PoweredUpBluetoothDeviceInfo, Task> discoveryHandler, CancellationToken cancellationToken = default)
{
_bluetoothAdapter.ScanMode = ScanMode.Balanced;
_bluetoothAdapter.DeviceDiscovered += ReceivedHandler;
cancellationToken.Register(async () =>
{
await _bluetoothAdapter.StopScanningForDevicesAsync().ConfigureAwait(false);
_bluetoothAdapter.DeviceDiscovered -= ReceivedHandler;
});
_bluetoothAdapter.StartScanningForDevicesAsync(new Guid[] { new Guid(PoweredUpBluetoothConstants.LegoHubService) }, DeviceFilter, false).ConfigureAwait(false);
async void ReceivedHandler(object sender, DeviceEventArgs args)
{
var info = new PoweredUpBluetoothDeviceInfo();
var advertisementRecord = args.Device.AdvertisementRecords.FirstOrDefault(x => x.Type == AdvertisementRecordType.ManufacturerSpecificData);
if (advertisementRecord?.Data?.Length > 0)
{
var data = advertisementRecord.Data.ToList();
data.RemoveRange(0, 2);
info.ManufacturerData = data.ToArray();
info.Name = args.Device.Name;
info.BluetoothAddress = _deviceInfoProvider.GetNativeDeviceInfo(args.Device.NativeDevice).MacAddressNumeric;
AddInternalDevice(args.Device, info);
await discoveryHandler(info).ConfigureAwait(false);
}
}
}
private void AddInternalDevice(IDevice device, PoweredUpBluetoothDeviceInfo info)
{
if (!_discoveredDevices.ContainsKey(info.BluetoothAddress))
{
_discoveredDevices.Add(info.BluetoothAddress, device);
}
else
{
_discoveredDevices[info.BluetoothAddress] = device;
}
}
public void Discover(Func <PoweredUpBluetoothDeviceInfo, Task> discoveryHandler, CancellationToken cancellationToken = default)
{
var watcher = new BluetoothLEAdvertisementWatcher
{
ScanningMode = BluetoothLEScanningMode.Active
};
watcher.AdvertisementFilter.Advertisement.ServiceUuids.Add(new Guid(PoweredUpBluetoothConstants.LegoHubService));
watcher.Received += ReceivedHandler;
cancellationToken.Register(() =>
{
watcher.Stop();
watcher.Received -= ReceivedHandler;
});
watcher.Start();
async void ReceivedHandler(BluetoothLEAdvertisementWatcher watcher, BluetoothLEAdvertisementReceivedEventArgs eventArgs)
{
var info = new PoweredUpBluetoothDeviceInfo();
if (eventArgs.Advertisement.ManufacturerData.Count > 0)
{
var reader = DataReader.FromBuffer(eventArgs.Advertisement.ManufacturerData[0].Data);
var data = new byte[reader.UnconsumedBufferLength];
reader.ReadBytes(data);
info.ManufacturerData = data;
using var device = BluetoothLEDevice.FromBluetoothAddressAsync(eventArgs.BluetoothAddress).AsTask().Result;
info.Name = device.Name;
}
info.BluetoothAddress = eventArgs.BluetoothAddress;
await discoveryHandler(info);
}
}
