private async void Disconnect()
{
if (_disconnecting)
{
return;
}
_connectedDevice = null;
_disconnecting = true;
await this.UnregisterAllValueChangeEvents();
if (_service != null)
{
// bugbug: if we call _service.Dispose below then the app will get System.ObjectDisposedException'
// next time it tries to reconnect to the device because the Windows BLE stack gives us back the
// disposed object next time we call GattDeviceService.FromIdAsync and there is no workaround
// besides this. The downside to this is that the phone will not "disconnect" from the BLE
// device. Not even after the app is closed.
//try
//{
// _service.Dispose();
//}
//catch { }
Debug.WriteLine("_service disconnected: " + this.GetType().Name);
_service = null;
}
_disconnecting = false;
_connected = false;
if (DisconnectFinished != null)
{
DisconnectFinished(this, EventArgs.Empty);
}
}
private SensorTag(BleGattDeviceInfo deviceInfo)
{
this.deviceInfo = deviceInfo;
this.version = 1;
string name = deviceInfo.DeviceInformation.Name;
Debug.WriteLine("Found sensor tag: [{0}]", name);
if (name == "CC2650 SensorTag" || name == "SensorTag 2.0")
{
this.version = 2;
this.deviceName = "CC2650";
}
else
{
this.deviceName = "CC2541";
}
}
/// <summary>
/// Initialize the new service
/// </summary>
/// <param name="serviceGuid">One of GattServiceUuids</param>
/// <param name="deviceContainerId">The device you are interested in or null if you want any device </param>
/// <param name="radioAddress">Optional radio address to match</param>
/// <returns></returns>
protected async Task <bool> ConnectAsync(Guid serviceGuid, string deviceContainerId, long radioAddress = -1)
{
_disconnecting = false;
this._requestedServiceGuid = serviceGuid;
_connectedDevice = null;
var devices = await FindMatchingDevices(serviceGuid);
if (!devices.Any())
{
_connected = false;
OnError("no devices found, try using bluetooth settings to pair your device");
return(false);
}
BleGattDeviceInfo matchingDevice = null;
foreach (var device in devices)
{
string id = device.ContainerId;
if (deviceContainerId == null || string.Compare(id, deviceContainerId, StringComparison.OrdinalIgnoreCase) == 0)
{
if (radioAddress == -1 || device.Address == (ulong)radioAddress)
{
DeviceContainerId = id;
matchingDevice = device;
break;
}
}
}
if (matchingDevice == null)
{
_connected = false;
OnError("requested device not found");
return(false);
}
DeviceName = matchingDevice.DeviceInformation.Name;
_service = await GattDeviceService.FromIdAsync(matchingDevice.DeviceInformation.Id);
if (_service == null)
{
_connected = false;
throw new Exception("Service not available, is another app still running that is using the service?");
}
_connected = true;
_connectedDevice = matchingDevice;
// don't wait on this, async is fine.
var nowait = RegisterForConnectionEvents();
OnConnectionChanged(_connected);
// in case the event handlers were added before Connect().
ReregisterAllValueChangeEvents();
if (_service != null)
{
Debug.WriteLine("Service connected: " + this.GetType().Name);
}
return(true);
}