public async Task <IReadOnlyList <TDevice> > Browse()
{
var devices = await DeviceInformation.FindAllAsync(BluetoothLEDevice.GetDeviceSelectorFromConnectionStatus(BluetoothConnectionStatus.Connected), requestedProperties);
return(devices.Select(d => new TDevice(HIOStaticValues.tmain?.SettingManager,
d.Name,
id: d.Id,
mac: GetMac(d),
signalValue: BLEDevice.GetSignal(d.Properties),
isConnected: d.Properties.ContainsKey(BLEDevice.IsConnectableProperty) ? (bool)d.Properties[BLEDevice.IsConnectedProperty] : false)).ToList());
}
public void StartScan(ICollection <TDevice> devices, Action onChangeCallback = null)
{
devices.Clear();
if (_Watcher == null)
{
Radio radio = null;
Task.Run(async() =>
{
radio = (await Radio.GetRadiosAsync()).FirstOrDefault(r => r.Kind == RadioKind.Bluetooth);
if (radio != null)
{
radio.StateChanged += (r, args) =>
{
if (radio.State == RadioState.Off)
{
App.Current.Dispatcher.Invoke(() => devices.Clear());
}
}
}
;
});
_Watcher = DeviceInformation.CreateWatcher(BluetoothLEDevice.GetDeviceSelectorFromConnectionStatus(BluetoothConnectionStatus.Connected), requestedProperties);
_Watcher.Added += async(s, e) =>
{
await semaphoreSlim.WaitAsync();
try
{
var di = await BluetoothLEDevice.FromIdAsync(e.Id);
if (di != null && await IsConnected(di) && await IsHIO(di) && !devices.Any(i => i.Id == e.Id))
{
App.Current.Dispatcher.Invoke(() =>
devices.Add(new TDevice(HIOStaticValues.tmain?.SettingManager,
e.Name,
id: e.Id,
mac: GetMac(e),
signalValue: BLEDevice.GetSignal(e.Properties),
isConnected: e.Properties.ContainsKey(BLEDevice.IsConnectableProperty) ? (bool)e.Properties[BLEDevice.IsConnectedProperty] : false)));
onChangeCallback?.Invoke();
}
}
catch (Exception ex)
{
_errorHandler.ErrorFunc(ex);
}
finally
{
semaphoreSlim.Release();
}
};
_Watcher.Updated += async(s, e) =>
{
await semaphoreSlim.WaitAsync();
try
{
if (!devices.Any(i => i.Id == e.Id))
{
var di = await BluetoothLEDevice.FromIdAsync(e.Id);
if (await IsConnected(di) && await IsHIO(di))
{
App.Current.Dispatcher.Invoke(() =>
devices.Add(new TDevice(HIOStaticValues.tmain?.SettingManager,
di.Name,
id: di.DeviceId,
signalValue: BLEDevice.GetSignal(e.Properties),
mac: GetMac(di))));
onChangeCallback?.Invoke();
}
else
{
}
}
}
catch (Exception ex)
{
_errorHandler.ErrorFunc(ex);
}
finally
{
semaphoreSlim.Release();
}
};
_Watcher.Removed += (s, e) =>
{
semaphoreSlim.WaitAsync();
try
{
App.Current.Dispatcher.Invoke(() => devices.Remove(devices.FirstOrDefault(i => i.Id == e.Id)));
onChangeCallback?.Invoke();
}
catch (Exception ex)
{
_errorHandler.ErrorFunc(ex);
}
finally
{
semaphoreSlim.Release();
}
};
_Watcher.Start();
}
else if (_Watcher.Status == DeviceWatcherStatus.Created ||
_Watcher.Status == DeviceWatcherStatus.Stopped ||
_Watcher.Status == DeviceWatcherStatus.EnumerationCompleted ||
_Watcher.Status == DeviceWatcherStatus.Aborted)
{
if (_Watcher.Status == DeviceWatcherStatus.EnumerationCompleted)
{
_Watcher.Stop();
_Watcher = null;
StartScan(devices, onChangeCallback);
return;
}
_Watcher.Start();
}
}