Can't set ALS sensors sensitivity

[AndreR]

Hi,

I want to set the sensitivity for my ALS sensor driver. I can set the value via SensorViewer but I have no access via HECI. I'm able to get sensor data via HECI. I use in my app the sensor property SENSOR_PROPERTY_CHANGE_SENSITIVITY. The type of the value is unknown. See Sensor Properties - Windows drivers | Microsoft Learn

Can you share with me an example how to set the value?

I use this code for the moment and I didn't get any error:

HRESULT SensorManager::SetSensitivity(ISensor* pSensor, ULONG ulSensitivity)

{

assert(pSensor);

HRESULT hr = S_OK;

// Configure sensitivity

// Create an IPortableDeviceValues container to hold the <Data Field,

IPortableDeviceValues* pInSensitivityValues;

hr = ::CoCreateInstance(CLSID_PortableDeviceValues, NULL, CLSCTX_INPROC_SERVER, IID_PPV_ARGS(&pInSensitivityValues));

if (FAILED(hr))

{

//::MessageBox(NULL, _T("Unable to CoCreateInstance() a PortableDeviceValues collection."), _T("HBS C++ Sample"), MB_OK |MB_ICONERROR);

        cout << "Unable to CoCreateInstance() a PortableDeviceValues collection." << endl;

return -1;

}

PROPVARIANT pv;

PropVariantInit(&pv);

pv.vt = VT_R8; // COM type for (double)

pv.dblVal = (double)ulSensitivity;

pInSensitivityValues->SetValue(SENSOR_DATA_TYPE_SENSOR_DATA_STATE, &pv);

// create an IPortableDeviceValues container for holding the <SENSOR_PROPERTY_CHANGE_SENSITIVITY, pInSensitivityValues> tuple.

IPortableDeviceValues* pInValues;

hr = ::CoCreateInstance(CLSID_PortableDeviceValues, NULL,CLSCTX_INPROC_SERVER, IID_PPV_ARGS(&pInValues));

if (FAILED(hr))

{

//::MessageBox(NULL, _T("Unable to CoCreateInstance() a PortableDeviceValues collection."), _T("HBS C++ Sample"), MB_OK |MB_ICONERROR);

        cout << "Unable to CoCreateInstance() a PortableDeviceValues collection." << endl;

return -1;

}

// fill it in

pInValues->SetIPortableDeviceValuesValue(SENSOR_PROPERTY_CHANGE_SENSITIVITY, pInSensitivityValues);

// now actually set the sensitivity

IPortableDeviceValues* pOutValues;

hr = pSensor->SetProperties(pInValues, &pOutValues);

if (FAILED(hr))

{

//::MessageBox(NULL, _T("Unable to SetProperties() for Sensitivity."),_T("HBS C++ Sample"), MB_OK | MB_ICONERROR);

        cout << "Unable to set sensitivity" << endl;

return -1;

}

PropVariantClear(&pv);

return hr;

}