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| ** This file is part of the examples of the QtBluetooth module of the Qt Toolkit. |
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| |
| #include <QtBluetooth/qlowenergyadvertisingdata.h> |
| #include <QtBluetooth/qlowenergyadvertisingparameters.h> |
| #include <QtBluetooth/qlowenergycharacteristic.h> |
| #include <QtBluetooth/qlowenergycharacteristicdata.h> |
| #include <QtBluetooth/qlowenergydescriptordata.h> |
| #include <QtBluetooth/qlowenergycontroller.h> |
| #include <QtBluetooth/qlowenergyservice.h> |
| #include <QtBluetooth/qlowenergyservicedata.h> |
| #include <QtCore/qbytearray.h> |
| #include <QtCore/qcoreapplication.h> |
| #include <QtCore/qlist.h> |
| #include <QtCore/qloggingcategory.h> |
| #include <QtCore/qscopedpointer.h> |
| #include <QtCore/qtimer.h> |
| |
| int main(int argc, char *argv[]) |
| { |
| //QLoggingCategory::setFilterRules(QStringLiteral("qt.bluetooth* = true")); |
| QCoreApplication app(argc, argv); |
| |
| //! [Advertising Data] |
| QLowEnergyAdvertisingData advertisingData; |
| advertisingData.setDiscoverability(QLowEnergyAdvertisingData::DiscoverabilityGeneral); |
| advertisingData.setIncludePowerLevel(true); |
| advertisingData.setLocalName("HeartRateServer"); |
| advertisingData.setServices(QList<QBluetoothUuid>() << QBluetoothUuid::HeartRate); |
| //! [Advertising Data] |
| |
| //! [Service Data] |
| QLowEnergyCharacteristicData charData; |
| charData.setUuid(QBluetoothUuid::HeartRateMeasurement); |
| charData.setValue(QByteArray(2, 0)); |
| charData.setProperties(QLowEnergyCharacteristic::Notify); |
| const QLowEnergyDescriptorData clientConfig(QBluetoothUuid::ClientCharacteristicConfiguration, |
| QByteArray(2, 0)); |
| charData.addDescriptor(clientConfig); |
| |
| QLowEnergyServiceData serviceData; |
| serviceData.setType(QLowEnergyServiceData::ServiceTypePrimary); |
| serviceData.setUuid(QBluetoothUuid::HeartRate); |
| serviceData.addCharacteristic(charData); |
| //! [Service Data] |
| |
| //! [Start Advertising] |
| const QScopedPointer<QLowEnergyController> leController(QLowEnergyController::createPeripheral()); |
| QScopedPointer<QLowEnergyService> service(leController->addService(serviceData)); |
| leController->startAdvertising(QLowEnergyAdvertisingParameters(), advertisingData, |
| advertisingData); |
| //! [Start Advertising] |
| |
| //! [Provide Heartbeat] |
| QTimer heartbeatTimer; |
| quint8 currentHeartRate = 60; |
| enum ValueChange { ValueUp, ValueDown } valueChange = ValueUp; |
| const auto heartbeatProvider = [&service, ¤tHeartRate, &valueChange]() { |
| QByteArray value; |
| value.append(char(0)); // Flags that specify the format of the value. |
| value.append(char(currentHeartRate)); // Actual value. |
| QLowEnergyCharacteristic characteristic |
| = service->characteristic(QBluetoothUuid::HeartRateMeasurement); |
| Q_ASSERT(characteristic.isValid()); |
| service->writeCharacteristic(characteristic, value); // Potentially causes notification. |
| if (currentHeartRate == 60) |
| valueChange = ValueUp; |
| else if (currentHeartRate == 100) |
| valueChange = ValueDown; |
| if (valueChange == ValueUp) |
| ++currentHeartRate; |
| else |
| --currentHeartRate; |
| }; |
| QObject::connect(&heartbeatTimer, &QTimer::timeout, heartbeatProvider); |
| heartbeatTimer.start(1000); |
| //! [Provide Heartbeat] |
| |
| auto reconnect = [&leController, advertisingData, &service, serviceData]() |
| { |
| service.reset(leController->addService(serviceData)); |
| if (!service.isNull()) |
| leController->startAdvertising(QLowEnergyAdvertisingParameters(), |
| advertisingData, advertisingData); |
| }; |
| QObject::connect(leController.data(), &QLowEnergyController::disconnected, reconnect); |
| |
| return app.exec(); |
| } |