Alexander Wechsler Wechsler Consulting GmbH & Co. KG SESSION CODE: WEM306

UMDF Sensor Driver This is a partial diagram of the Sensor and Location Platform, showing only Sensor- related parts

Enumerated via category and type GUID s Category represents what is being sensed (e.g. environment, location, motion, electrical) Type represents how it is being sensed (e.g. thermometer, GPS, accelerometer, voltage) Properties Read-only (e.g. model) or read-write (e.g. report interval). Sensors may have custom properties. Data Get (sensor-specific) data report object synchronously (not recommended) or asynchronously (events) Events State change, leave (detach), data updated, custom State Is sensor working properly? Do you have access?

#include HRESULT hr; CComPtr pSensorManager; pSensorManager.CoCreateInstance(CLSID_SensorManager); CComPtr pALSCollection; CComPtr pALSSensor; // Get all the ALS sensors on the system pSensorManager->GetSensorsByType(SENSOR_TYPE_AMBIENT_LIGHT, &pALSCollection); hr = pSensorManager->RequestPermissions( 0, // Owner window pALSCollection, // Collection of sensors requiring permissions TRUE); // Modal flag if(SUCCEEDED(hr)) { pALSCollection->GetAt(0, &pALSSensor); }

STDMETHODIMP CALSEventSink::OnDataUpdated( ISensor* pSensor, ISensorDataReport* pNewData) { PROPVARIANT lightLevel; PropVariantInit(&lightLevel); // Get the sensor reading from the ISensorDataReport object pNewData->GetSensorValue(SENSOR_DATA_TYPE_LIGHT_LEVEL_LUX, &lightLevel); // Extract the float value from the PROPVARIANT object float luxValue = V_FLOAT(lightLevel); // Normalize the light sensor data double lightNormalized = ::pow(luxValue, 0.4) / 100.0; // Handle UI changes based on the normalized LUX data // which ranges from for a lux range of // 0 lux to 100,000 lux, this method represents such a // handler that would be implemented in your application UpdateUI(lightNormalized); PropVariantClear(&lightLevel); return S_OK; }

The three classes retain the same roles as they had in the COM API, only wrapping properties and events

User System

Accelerometer3D[] sensors = SensorManager.GetSensorsByType (); Accelerometer3D a3dSensor = null; if (sensors.Length > 0) { a3dSensor = sensors[0]; SensorManager.RequestPermission(IntPtr.Zero, true, a3dSensor); }

a3dSensor.DataUpdated += OnDataUpdated; void OnDataUpdated(Sensor sensor, SensorDataReport dataReport) { Accelerometer3DReport a3dReport = (Accelerometer3DReport)dataReport; Console.WriteLine("X: {0} Y: {1} Z: {2}", a3dReport.AxisX_G, a3dReport.AxisY_G, a3dReport.AxisZ_G); }

HRESULT hr; IID civicReportIID = IID_ICivicAddressReport; CComPtr pLocation; CComPtr pReport; hr = pLocation.CoCreateInstance(CLSID_Location); hr = pLocation->RequestPermissions(0, &civicReportIID, 1, TRUE); hr = pLocation->GetReport(civicReportIID, &pReport); CComPtr pCivicAddressReport; pReport.QueryInterface (&pCivicAddressReport); BSTR str; hr = pCivicAddressReport->GetCountryRegion(&str); _tprintf(_T("Country/region: %s\n"), str); SysFreeString(str);

var provider = new CivicAddressLocationProvider(10000); LocationProvider.RequestPermissions(IntPtr.Zero, true, provider); var report = (CivicAddressLocationReport) provider.GetReport(); Console.WriteLine("Country/region: “,report.CountryOrRegion);

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