private async void Connect(IDevice _device)
{
Trace.Message("device name :" + _device.Name);
await BleMvxApplication._reader.ConnectAsync(Adapter, _device);
Trace.Message("load config");
//bool LoadSuccess = await BleMvxApplication.LoadConfig(_device.Name);
//BleMvxApplication._config.readerID = _device.Name;
bool LoadSuccess = await BleMvxApplication.LoadConfig(_device.Id.ToString());
BleMvxApplication._config.readerID = _device.Id.ToString();
}