private void ClearBluetoothLEDevice()
{
GattService?.Dispose();
GattService = null;
if (ControlPoint != null)
{
ControlPoint = null;
}
if (NotificationSource != null)
{
NotificationSource.ValueChanged -= NotificationSource_ValueChanged;
NotificationSource = null;
}
if (DataSource != null)
{
DataSource.NotificationAttributesReceived -= DataSource_NotificationAttributesReceived;
DataSource = null;
}
try
{
bluetoothLeDevice.ConnectionStatusChanged -= BluetoothLeDevice_ConnectionStatusChanged;
}
catch (Exception ex)
{
// Do nothing
}
bluetoothLeDevice?.Dispose();
bluetoothLeDevice = null;
}
public async void Connect()
{
ClearBluetoothLEDevice();
try
{
// BT_Code: BluetoothLEDevice.FromIdAsync must be called from a UI thread because it may prompt for consent.
bluetoothLeDevice = await BluetoothLEDevice.FromIdAsync(BluetoothLEDeviceId);
bluetoothLeDevice.ConnectionStatusChanged += BluetoothLeDevice_ConnectionStatusChanged;
}
catch (Exception ex) when((uint)ex.HResult == 0x800710df)
{
// ERROR_DEVICE_NOT_AVAILABLE because the Bluetooth radio is not on.
}
if (bluetoothLeDevice != null)
{
Guid ancsUuid = new Guid("7905F431-B5CE-4E99-A40F-4B1E122D00D0");
try
{
GattService = bluetoothLeDevice.GetGattService(ancsUuid);
}
catch (Exception ex)
{
throw new Exception("Apple Notification Center Service not found.");
}
if (GattService == null)
{
throw new Exception("Apple Notification Center Service not found.");
}
else
{
Guid notificationSourceUuid = new Guid("9FBF120D-6301-42D9-8C58-25E699A21DBD");
Guid controlPointUuid = new Guid("69D1D8F3-45E1-49A8-9821-9BBDFDAAD9D9");
Guid dataSourceUuid = new Guid("22EAC6E9-24D6-4BB5-BE44-B36ACE7C7BFB");
try
{
ControlPoint = new ControlPoint(GattService.GetCharacteristics(controlPointUuid).First());
DataSource = new DataSource(GattService.GetCharacteristics(dataSourceUuid).First());
NotificationSource = new NotificationSource(GattService.GetCharacteristics(notificationSourceUuid).First());
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
}
}
else
{
ClearBluetoothLEDevice();
throw new Exception("Failed to connect to device.");
}
}