protected virtual void OnWatcherEventReached(BtleWatcherEventsArgs e)
{
// Fire the event
EventHandler <BtleWatcherEventsArgs> handler = WacherEvent;
handler?.Invoke(this, e);
}
public void InitializeBtleWatcher(string aqsFilter)
{
if (Watcher != null)
{
return;
}
ResultCollection.Clear();
Debug.WriteLine("BTLEWatcher aqsFilter: " + aqsFilter);
////////////////////////////////////////////////////////////////
// Create the Watcher for the BTLE - GATT_STREAM_SERVICE_UUID //
////////////////////////////////////////////////////////////////
// List of additional properties
// https://msdn.microsoft.com/en-us/windows/uwp/devices-sensors/device-information-properties
Watcher = DeviceInformation.CreateWatcher(aqsFilter); // An AQS string that filters the DeviceInformation objects to enumerate
/////////////////////////////////////////////////////////////////////////
// Hook up handlers for the watcher events before starting the watcher //
/////////////////////////////////////////////////////////////////////////
///////////
// Added //
///////////
_handlerAdded = async(watcher, deviceInfo) =>
{
// Since we have the collection databound to a UI element, we need to update the collection on the UI thread.
await RootPage.Dispatcher.RunAsync(CoreDispatcherPriority.Low, () =>
{
// Check for duplicate entry
var isDuplicate = ResultCollection.Any(bleInfoDisp => deviceInfo.Id == bleInfoDisp.Id);
if (isDuplicate)
{
return;
}
// DeviceID W4 - \\?\BTHLEDevice#{151c0000-4580-4111-9ca1-5056f3454fbc}_f7a30813de8a#6&2e59d2a&f9&000c#{6e3bb679-4372-40c8-9eaa-4509df260cd8}
Debug.WriteLine(Name + " - " + deviceInfo.Id);
ResultCollection.Add(new DeviceInformationDisplay(deviceInfo));
//MainPage.Debug_DisplayDeviceParams( deviceInfo, ResultCollection.Count );
RootPage.NotifyUser(string.Format(Name + "-{0} devices found.", ResultCollection.Count), NotifyType.StatusMessage);
// Fire Event
var args = new BtleWatcherEventsArgs
{
Event = WatcherEvents.Added,
TimeReached = DateTime.Now
};
OnWatcherEventReached(args);
});
};
Watcher.Added += _handlerAdded;
/////////////
// Updated //
/////////////
_handlerUpdated = async(watcher, deviceInfoUpdate) =>
{
// Since we have the collection databound to a UI element, we need to update the collection on the UI thread.
await RootPage.Dispatcher.RunAsync(CoreDispatcherPriority.Low, () =>
{
// Find the corresponding updated DeviceInformation in the collection and pass the update object
// to the Update method of the existing DeviceInformation. This automatically updates the object for us.
foreach (DeviceInformationDisplay deviceInfoDisp in ResultCollection)
{
if (deviceInfoDisp.Id != deviceInfoUpdate.Id)
{
continue;
}
deviceInfoDisp.Update(deviceInfoUpdate, Name);
break;
}
// Fire Event
var args = new BtleWatcherEventsArgs
{
Event = WatcherEvents.Updated,
TimeReached = DateTime.Now
};
OnWatcherEventReached(args);
});
};
Watcher.Updated += _handlerUpdated;
/////////////
// Removed //
/////////////
_handlerRemoved = async(watcher, deviceInfoUpdate) =>
{
// Since we have the collection databound to a UI element, we need to update the collection on the UI thread.
await RootPage.Dispatcher.RunAsync(CoreDispatcherPriority.Low, () =>
{
// Find the corresponding DeviceInformation in the collection and remove it
foreach (DeviceInformationDisplay deviceInfoDisp in ResultCollection)
{
if (deviceInfoDisp.Id != deviceInfoUpdate.Id)
{
continue;
}
if (ResultCollection.Contains(deviceInfoDisp))
{
ResultCollection.Remove(deviceInfoDisp);
}
break;
}
RootPage.NotifyUser(string.Format(Name + "-{0} devices found.", ResultCollection.Count), NotifyType.StatusMessage);
// Fire Event
var args = new BtleWatcherEventsArgs
{
Event = WatcherEvents.Removed,
TimeReached = DateTime.Now
};
OnWatcherEventReached(args);
});
};
Watcher.Removed += _handlerRemoved;
//////////////////////////
// EnumerationCompleted //
//////////////////////////
_handlerEnumCompleted = async(watcher, obj) =>
{
await RootPage.Dispatcher.RunAsync(CoreDispatcherPriority.Low, () =>
{
EnumCompleted = true;
Debug.WriteLine(Name + " Enumeration completed: {0} devices found .... Watching for updates...", ResultCollection.Count);
RootPage.NotifyUser(string.Format(Name + "-{0} devices found.\n{1}-Enumeration completed.\n{1}-Watching for updates...", ResultCollection.Count, Name), NotifyType.StatusMessage);
Utility.VibratePhone();
// Fire Event
var args = new BtleWatcherEventsArgs
{
Event = WatcherEvents.EnumerationCompleted,
TimeReached = DateTime.Now
};
OnWatcherEventReached(args);
});
};
Watcher.EnumerationCompleted += _handlerEnumCompleted;
/////////////
// Stopped //
/////////////
_handlerStopped = async(watcher, obj) =>
{
await RootPage.Dispatcher.RunAsync(CoreDispatcherPriority.Low, () =>
{
RootPage.NotifyUser(string.Format(Name + "-{0} devices found. Watcher {1}.",
ResultCollection.Count, DeviceWatcherStatus.Aborted == watcher.Status ? "aborted" : "stopped"),
NotifyType.StatusMessage);
// Fire Event
var args = new BtleWatcherEventsArgs
{
Event = WatcherEvents.Stopped,
TimeReached = DateTime.Now
};
OnWatcherEventReached(args);
});
};
Watcher.Stopped += _handlerStopped;
}