Question

我正在使用Windows 8.1 Store应用程序从ti Sensortag蓝牙低能耗设备接收数据。

通过DeviceInformation扫描设备:: FindAllAsync正常工作：

void App1::MainPage::ScanButton_Click(Platform::Object^ sender,     
    Windows::UI::Xaml::RoutedEventArgs^ e)
{
    create_task(DeviceInformation::FindAllAsync(GattDeviceService::GetDeviceSelectorFromUuid(GattServiceUuids::GenericAttribute), nullptr))
        .then
        ([this](DeviceInformationCollection^ Geräteliste)
    {
        int Anzahl = Geräteliste->Size;
        auto Geräteliste_Iterator = Geräteliste->First();
        TestId = Geräteliste_Iterator->Current->Id;
        TestName = Geräteliste_Iterator->Current->Name;
    }
    );

    Geräte_Namen_Block->Text = TestName + TestId;
}

但是，当我尝试获取Device的特性或服务时，我会回到一个空的Ivector：

 Guid DeviceInformationServiceUuid(0xf0002800, 0x0451, 0x4000, 0xB0,    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00);
 Guid PeripheralPrivacyFlagCharacteristic(0xf0002a02, 0x0451, 0x4000, 0xb0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00);

 void App1::MainPage::___Service_Button__Click(Platform::Object^ sender, Windows::UI::Xaml::RoutedEventArgs^ e)
 {
create_task(GattDeviceService::FromIdAsync(TestId)).then([this](GattDeviceService^ Mein_Gerät)
{   
    TestId_vonDeviceService = Mein_Gerät->DeviceId; 
    //GattCharacteristic^ FirstCharacteristic = Mein_Gerät->GetCharacteristics(PeripheralPrivacyFlagCharacteristic)->GetAt(0);
    ServicesVector = Mein_Gerät->GetIncludedServices(DeviceInfoUuid);
    CharacteristicsVector = Mein_Gerät->GetCharacteristics(PeripheralPrivacyFlagCharacteristic);
    ServicesLength = ServicesVector->Size;
    CharacteristicsLength = CharacteristicsVector->Size;

});

}

我已经在app manifest xml中添加了两个服务的ID，如下所示：

m2:Function Type="serviceId:f0002a29-0451-4000-b000-000000000000"/>  <!--Device Name-->

m2:Function Type="serviceId:f0002a01-0451-4000-b000-000000000000"/>  <!--Appearance-->
        <m2:Function Type="serviceId:f0002a02-0451-4000-b000-000000000000"/>  <!--Periperal Privacy Flag-->

我认为这应该是正确的。所以现在我不知道为什么？

windows store app（c ++ / cx）从ti sensortag连接到找不到服务

0 个答案: