//Watcher for Bluetooth LE Devices based on the Protocol ID
private async void StartWatcher()
{
string aqsFilter;
numDevicesFound = 0;
var bTSupported = await BT.GetBluetoothIsSupportedAsync();
if (!bTSupported)
{
Dispatcher.RunAsync(CoreDispatcherPriority.Low, () =>
{
UserOut.Text = "No Bluetooth radios available";
System.Diagnostics.Debug.WriteLine("No Bluetooth radios available!");
});
return;
}
var bTIsEnabled = await BT.GetBluetoothIsEnabledAsync();
if (!bTIsEnabled)
{
bool bAccess = true;
Dispatcher.RunAsync(CoreDispatcherPriority.Low, async() =>
{
var access = await BT.RequestAccessAsync();
bAccess = access;
});
if (bAccess)
{
bTIsEnabled = await BT.SetBluetoothStateOnAsync();
if (!bTIsEnabled)
{
Dispatcher.RunAsync(CoreDispatcherPriority.Low, () =>
{
UserOut.Text = "Bluetooth isn't enabled! Turn on Failed";
System.Diagnostics.Debug.WriteLine("Bluetooth isn't enabled! Turn on Failed.");
});
return;
}
}
}
//If sensors are paired we can skip straight to getting GATT services
//Assumes only one sensor paired
//Seeingthat we are already paired cut straight to the chase
Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
UserOut.Text = "Setting up SensorTag";
});
iSetUpProgress = 0;
SetUpProgress();
CC2650SensorTag.SetUpProgress = SetUpProgress;
CC2650SensorTag.SetBatteryLevel = SetBatteryLevel;
CC2650SensorTag_BLEWatcher.StartBLEWatcher(this, SetDeviceInfo, SetUpProgress2);
return;
// Request the IsPaired property so we can display the paired status in the UI
string[] requestedProperties = { "System.Devices.Aep.IsPaired" };
//for bluetooth LE Devices
aqsFilter = "System.Devices.Aep.ProtocolId:=\"{bb7bb05e-5972-42b5-94fc-76eaa7084d49}\"";
deviceWatcher = DeviceInformation.CreateWatcher(
aqsFilter,
requestedProperties,
DeviceInformationKind.AssociationEndpoint
);
// Hook up handlers for the watcher events before starting the watcher
handlerAdded = async(watcher, deviceInfo) =>
{
// Since we have the collection databound to a UI element, we need to update the collection on the UI thread.
this.Dispatcher.RunAsync(CoreDispatcherPriority.Low, () =>
{
if (numDevicesFound < numDevices)
{
//Depending upon firware there are two names.
if (CC2650SensorTag.DeviceAltSensorNames.Contains(deviceInfo.Name))
{
Debug.WriteLine("Watcher Add: " + deviceInfo.Id);
ResultCollection.Add(new DeviceInformationDisplay(deviceInfo));
UpdatePairingButtons();
//resultsListView.IsEnabled = true;
UserOut.Text = "Found at least one SensorTag. " + " Select for pairing. Still searching for others though.";
var st = watcher.Status;
numDevicesFound++;
if (numDevicesFound == numDevices)
{
if (watcher != null)
{
if (st != DeviceWatcherStatus.Stopped)
{
watcher.Stop();
}
}
}
}
}
});
};
deviceWatcher.Added += handlerAdded;
handlerUpdated = async(watcher, deviceInfoUpdate) =>
{
// Since we have the collection databound to a UI element, we need to update the collection on the UI thread.
Dispatcher.RunAsync(CoreDispatcherPriority.Low, () =>
{
//Debug.WriteLine("Watcher Update: " + deviceInfoUpdate.Id);
// 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)
{
deviceInfoDisp.Update(deviceInfoUpdate);
break;
}
}
});
};
deviceWatcher.Updated += handlerUpdated;
handlerRemoved = async(watcher, deviceInfoUpdate) =>
{
// Since we have the collection databound to a UI element, we need to update the collection on the UI thread.
Dispatcher.RunAsync(CoreDispatcherPriority.Low, () =>
{
Debug.WriteLine("Watcher Remove: " + deviceInfoUpdate.Id);
// Find the corresponding DeviceInformation in the collection and remove it
foreach (DeviceInformationDisplay deviceInfoDisp in ResultCollection)
{
if (deviceInfoDisp.Id == deviceInfoUpdate.Id)
{
ResultCollection.Remove(deviceInfoDisp);
UpdatePairingButtons();
if (ResultCollection.Count == 0)
{
UserOut.Text = "Searching for Bluetooth LE Devices...";
}
break;
}
}
});
};
deviceWatcher.Removed += handlerRemoved;
handlerStopped = async(watcher, obj) =>
{
Dispatcher.RunAsync(CoreDispatcherPriority.Low, () =>
{
Debug.WriteLine($"Watcher Stopped: Found {ResultCollection.Count} Bluetooth LE Devices");
if (ResultCollection.Count > 0)
{
UserOut.Text = "Select a device for pairing";
}
else
{
UserOut.Text = "No Bluetooth LE Devices found.";
}
UpdatePairingButtons();
});
};
handlerEnumCompleted = async(watcher, obj) =>
{
Dispatcher.RunAsync(CoreDispatcherPriority.Low, () =>
{
Debug.WriteLine($"Found {ResultCollection.Count} Bluetooth LE Devices");
if (ResultCollection.Count > 0)
{
UserOut.Text = "Select a " + CC2650SensorTag.DeviceAltSensorNames + " for pairing. Search done.";
}
else
{
UserOut.Text = "Search done: No Bluetooth LE Devices found.";
}
UpdatePairingButtons();
});
};
deviceWatcher.EnumerationCompleted += handlerEnumCompleted;
deviceWatcher.Start();
}