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50
51#include <QtBluetooth/qlowenergyadvertisingdata.h>
52#include <QtBluetooth/qlowenergyadvertisingparameters.h>
53#include <QtBluetooth/qlowenergycharacteristic.h>
54#include <QtBluetooth/qlowenergycharacteristicdata.h>
55#include <QtBluetooth/qlowenergydescriptordata.h>
56#include <QtBluetooth/qlowenergycontroller.h>
57#include <QtBluetooth/qlowenergyservice.h>
58#include <QtBluetooth/qlowenergyservicedata.h>
59#include <QtCore/qbytearray.h>
60#ifndef Q_OS_ANDROID
61#include <QtCore/qcoreapplication.h>
62#else
63#include <QtGui/qguiapplication.h>
64#endif
65#include <QtCore/qlist.h>
66#include <QtCore/qloggingcategory.h>
67#include <QtCore/qscopedpointer.h>
68#include <QtCore/qtimer.h>
69
70int main(int argc, char *argv[])
71{
72 //QLoggingCategory::setFilterRules(QStringLiteral("qt.bluetooth* = true"));
73#ifndef Q_OS_ANDROID
74 QCoreApplication app(argc, argv);
75#else
76 QGuiApplication app(argc, argv);
77#endif
78
79 //! [Advertising Data]
80 QLowEnergyAdvertisingData advertisingData;
81 advertisingData.setDiscoverability(QLowEnergyAdvertisingData::DiscoverabilityGeneral);
82 advertisingData.setIncludePowerLevel(true);
83 advertisingData.setLocalName("HeartRateServer");
84 advertisingData.setServices(QList<QBluetoothUuid>() << QBluetoothUuid::HeartRate);
85 //! [Advertising Data]
86
87 //! [Service Data]
88 QLowEnergyCharacteristicData charData;
89 charData.setUuid(QBluetoothUuid::HeartRateMeasurement);
90 charData.setValue(QByteArray(2, 0));
91 charData.setProperties(QLowEnergyCharacteristic::Notify);
92 const QLowEnergyDescriptorData clientConfig(QBluetoothUuid::ClientCharacteristicConfiguration,
93 QByteArray(2, 0));
94 charData.addDescriptor(descriptor: clientConfig);
95
96 QLowEnergyServiceData serviceData;
97 serviceData.setType(QLowEnergyServiceData::ServiceTypePrimary);
98 serviceData.setUuid(QBluetoothUuid::HeartRate);
99 serviceData.addCharacteristic(characteristic: charData);
100 //! [Service Data]
101
102 //! [Start Advertising]
103 const QScopedPointer<QLowEnergyController> leController(QLowEnergyController::createPeripheral());
104 QScopedPointer<QLowEnergyService> service(leController->addService(service: serviceData));
105 leController->startAdvertising(parameters: QLowEnergyAdvertisingParameters(), advertisingData,
106 scanResponseData: advertisingData);
107 //! [Start Advertising]
108
109 //! [Provide Heartbeat]
110 QTimer heartbeatTimer;
111 quint8 currentHeartRate = 60;
112 enum ValueChange { ValueUp, ValueDown } valueChange = ValueUp;
113 const auto heartbeatProvider = [&service, &currentHeartRate, &valueChange]() {
114 QByteArray value;
115 value.append(c: char(0)); // Flags that specify the format of the value.
116 value.append(c: char(currentHeartRate)); // Actual value.
117 QLowEnergyCharacteristic characteristic
118 = service->characteristic(uuid: QBluetoothUuid::HeartRateMeasurement);
119 Q_ASSERT(characteristic.isValid());
120 service->writeCharacteristic(characteristic, newValue: value); // Potentially causes notification.
121 if (currentHeartRate == 60)
122 valueChange = ValueUp;
123 else if (currentHeartRate == 100)
124 valueChange = ValueDown;
125 if (valueChange == ValueUp)
126 ++currentHeartRate;
127 else
128 --currentHeartRate;
129 };
130 QObject::connect(sender: &heartbeatTimer, signal: &QTimer::timeout, slot: heartbeatProvider);
131 heartbeatTimer.start(msec: 1000);
132 //! [Provide Heartbeat]
133
134 auto reconnect = [&leController, advertisingData, &service, serviceData]()
135 {
136 service.reset(other: leController->addService(service: serviceData));
137 if (!service.isNull())
138 leController->startAdvertising(parameters: QLowEnergyAdvertisingParameters(),
139 advertisingData, scanResponseData: advertisingData);
140 };
141 QObject::connect(sender: leController.data(), signal: &QLowEnergyController::disconnected, slot: reconnect);
142
143 return app.exec();
144}
145

source code of qtconnectivity/examples/bluetooth/heartrate-server/main.cpp