<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>main.cpp Example File | Qt Bluetooth 5.12.2</title> <link rel="stylesheet" type="text/css" href="style/offline-simple.css" /> <script type="text/javascript"> document.getElementsByTagName("link").item(0).setAttribute("href", "style/offline.css"); // loading style sheet breaks anchors that were jumped to before // so force jumping to anchor again setTimeout(function() { var anchor = location.hash; // need to jump to different anchor first (e.g. none) location.hash = "#"; setTimeout(function() { location.hash = anchor; }, 0); }, 0); </script> </head> <body> <div class="header" id="qtdocheader"> <div class="main"> <div class="main-rounded"> <div class="navigationbar"> <table><tr> <td >Qt 5.12</td><td ><a href="qtbluetooth-index.html">Qt Bluetooth</a></td><td ><a href="qtbluetooth-heartrate-server-example.html">Bluetooth Low Energy Heart Rate Server Example</a></td><td >main.cpp Example File</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right"><a href="qtbluetooth-index.html">Qt 5.12.2 Reference Documentation</a></td> </tr></table> </div> </div> <div class="content"> <div class="line"> <div class="content mainContent"> <div class="sidebar"><div class="sidebar-content" id="sidebar-content"></div></div> <h1 class="title">main.cpp Example File</h1> <span class="subtitle">heartrate-server/main.cpp</span> <!-- $$$heartrate-server/main.cpp-description --> <div class="descr"> <a name="details"></a> <pre class="cpp"> <span class="comment">/*************************************************************************** ** ** Copyright (C) 2017 The Qt Company Ltd. ** Contact: https://www.qt.io/licensing/ ** ** This file is part of the examples of the QtBluetooth module of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:BSD$ ** Commercial License Usage ** Licensees holding valid commercial Qt licenses may use this file in ** accordance with the commercial license agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and The Qt Company. For licensing terms ** and conditions see https://www.qt.io/terms-conditions. For further ** information use the contact form at https://www.qt.io/contact-us. ** ** BSD License Usage ** Alternatively, you may use this file under the terms of the BSD license ** as follows: ** ** "Redistribution and use in source and binary forms, with or without ** modification, are permitted provided that the following conditions are ** met: ** * Redistributions of source code must retain the above copyright ** notice, this list of conditions and the following disclaimer. ** * Redistributions in binary form must reproduce the above copyright ** notice, this list of conditions and the following disclaimer in ** the documentation and/or other materials provided with the ** distribution. ** * Neither the name of The Qt Company Ltd nor the names of its ** contributors may be used to endorse or promote products derived ** from this software without specific prior written permission. ** ** ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." ** ** $QT_END_LICENSE$ ** ****************************************************************************/</span> <span class="preprocessor">#include <QtBluetooth/qlowenergyadvertisingdata.h></span> <span class="preprocessor">#include <QtBluetooth/qlowenergyadvertisingparameters.h></span> <span class="preprocessor">#include <QtBluetooth/qlowenergycharacteristic.h></span> <span class="preprocessor">#include <QtBluetooth/qlowenergycharacteristicdata.h></span> <span class="preprocessor">#include <QtBluetooth/qlowenergydescriptordata.h></span> <span class="preprocessor">#include <QtBluetooth/qlowenergycontroller.h></span> <span class="preprocessor">#include <QtBluetooth/qlowenergyservice.h></span> <span class="preprocessor">#include <QtBluetooth/qlowenergyservicedata.h></span> <span class="preprocessor">#include <QtCore/qbytearray.h></span> <span class="preprocessor">#include <QtCore/qcoreapplication.h></span> <span class="preprocessor">#include <QtCore/qlist.h></span> <span class="preprocessor">#include <QtCore/qloggingcategory.h></span> <span class="preprocessor">#include <QtCore/qscopedpointer.h></span> <span class="preprocessor">#include <QtCore/qtimer.h></span> <span class="type">int</span> main(<span class="type">int</span> argc<span class="operator">,</span> <span class="type">char</span> <span class="operator">*</span>argv<span class="operator">[</span><span class="operator">]</span>) { <span class="comment">//QLoggingCategory::setFilterRules(QStringLiteral("qt.bluetooth* = true"));</span> <span class="type">QCoreApplication</span> app(argc<span class="operator">,</span> argv); <span class="type"><a href="qlowenergyadvertisingdata.html">QLowEnergyAdvertisingData</a></span> advertisingData; advertisingData<span class="operator">.</span>setDiscoverability(<span class="type"><a href="qlowenergyadvertisingdata.html">QLowEnergyAdvertisingData</a></span><span class="operator">::</span>DiscoverabilityGeneral); advertisingData<span class="operator">.</span>setIncludePowerLevel(<span class="keyword">true</span>); advertisingData<span class="operator">.</span>setLocalName(<span class="string">"HeartRateServer"</span>); advertisingData<span class="operator">.</span>setServices(<span class="type">QList</span><span class="operator"><</span><span class="type"><a href="qbluetoothuuid.html">QBluetoothUuid</a></span><span class="operator">></span>() <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="qbluetoothuuid.html">QBluetoothUuid</a></span><span class="operator">::</span>HeartRate); <span class="type"><a href="qlowenergycharacteristicdata.html">QLowEnergyCharacteristicData</a></span> charData; charData<span class="operator">.</span>setUuid(<span class="type"><a href="qbluetoothuuid.html">QBluetoothUuid</a></span><span class="operator">::</span>HeartRateMeasurement); charData<span class="operator">.</span>setValue(<span class="type">QByteArray</span>(<span class="number">2</span><span class="operator">,</span> <span class="number">0</span>)); charData<span class="operator">.</span>setProperties(<span class="type"><a href="qlowenergycharacteristic.html">QLowEnergyCharacteristic</a></span><span class="operator">::</span>Notify); <span class="keyword">const</span> <span class="type"><a href="qlowenergydescriptordata.html">QLowEnergyDescriptorData</a></span> clientConfig(<span class="type"><a href="qbluetoothuuid.html">QBluetoothUuid</a></span><span class="operator">::</span>ClientCharacteristicConfiguration<span class="operator">,</span> <span class="type">QByteArray</span>(<span class="number">2</span><span class="operator">,</span> <span class="number">0</span>)); charData<span class="operator">.</span>addDescriptor(clientConfig); <span class="type"><a href="qlowenergyservicedata.html">QLowEnergyServiceData</a></span> serviceData; serviceData<span class="operator">.</span>setType(<span class="type"><a href="qlowenergyservicedata.html">QLowEnergyServiceData</a></span><span class="operator">::</span>ServiceTypePrimary); serviceData<span class="operator">.</span>setUuid(<span class="type"><a href="qbluetoothuuid.html">QBluetoothUuid</a></span><span class="operator">::</span>HeartRate); serviceData<span class="operator">.</span>addCharacteristic(charData); <span class="keyword">const</span> <span class="type">QScopedPointer</span><span class="operator"><</span><span class="type"><a href="qlowenergycontroller.html">QLowEnergyController</a></span><span class="operator">></span> leController(<span class="type"><a href="qlowenergycontroller.html">QLowEnergyController</a></span><span class="operator">::</span>createPeripheral()); <span class="type">QScopedPointer</span><span class="operator"><</span><span class="type"><a href="qlowenergyservice.html">QLowEnergyService</a></span><span class="operator">></span> service(leController<span class="operator">-</span><span class="operator">></span>addService(serviceData)); leController<span class="operator">-</span><span class="operator">></span>startAdvertising(<span class="type"><a href="qlowenergyadvertisingparameters.html">QLowEnergyAdvertisingParameters</a></span>()<span class="operator">,</span> advertisingData<span class="operator">,</span> advertisingData); <span class="type">QTimer</span> heartbeatTimer; <span class="type">quint8</span> currentHeartRate <span class="operator">=</span> <span class="number">60</span>; <span class="keyword">enum</span> ValueChange { ValueUp<span class="operator">,</span> ValueDown } valueChange <span class="operator">=</span> ValueUp; <span class="keyword">const</span> <span class="keyword">auto</span> heartbeatProvider <span class="operator">=</span> <span class="operator">[</span><span class="operator">&</span>service<span class="operator">,</span> <span class="operator">&</span>currentHeartRate<span class="operator">,</span> <span class="operator">&</span>valueChange<span class="operator">]</span>() { <span class="type">QByteArray</span> value; value<span class="operator">.</span>append(<span class="type">char</span>(<span class="number">0</span>)); <span class="comment">// Flags that specify the format of the value.</span> value<span class="operator">.</span>append(<span class="type">char</span>(currentHeartRate)); <span class="comment">// Actual value.</span> <span class="type"><a href="qlowenergycharacteristic.html">QLowEnergyCharacteristic</a></span> characteristic <span class="operator">=</span> service<span class="operator">-</span><span class="operator">></span>characteristic(<span class="type"><a href="qbluetoothuuid.html">QBluetoothUuid</a></span><span class="operator">::</span>HeartRateMeasurement); Q_ASSERT(characteristic<span class="operator">.</span>isValid()); service<span class="operator">-</span><span class="operator">></span>writeCharacteristic(characteristic<span class="operator">,</span> value); <span class="comment">// Potentially causes notification.</span> <span class="keyword">if</span> (currentHeartRate <span class="operator">=</span><span class="operator">=</span> <span class="number">60</span>) valueChange <span class="operator">=</span> ValueUp; <span class="keyword">else</span> <span class="keyword">if</span> (currentHeartRate <span class="operator">=</span><span class="operator">=</span> <span class="number">100</span>) valueChange <span class="operator">=</span> ValueDown; <span class="keyword">if</span> (valueChange <span class="operator">=</span><span class="operator">=</span> ValueUp) <span class="operator">+</span><span class="operator">+</span>currentHeartRate; <span class="keyword">else</span> <span class="operator">-</span><span class="operator">-</span>currentHeartRate; }; <span class="type">QObject</span><span class="operator">::</span>connect(<span class="operator">&</span>heartbeatTimer<span class="operator">,</span> <span class="operator">&</span><span class="type">QTimer</span><span class="operator">::</span>timeout<span class="operator">,</span> heartbeatProvider); heartbeatTimer<span class="operator">.</span>start(<span class="number">1000</span>); <span class="keyword">auto</span> reconnect <span class="operator">=</span> <span class="operator">[</span><span class="operator">&</span>leController<span class="operator">,</span> advertisingData<span class="operator">,</span> <span class="operator">&</span>service<span class="operator">,</span> serviceData<span class="operator">]</span>() { service<span class="operator">.</span>reset(leController<span class="operator">-</span><span class="operator">></span>addService(serviceData)); <span class="keyword">if</span> (<span class="operator">!</span>service<span class="operator">.</span>isNull()) leController<span class="operator">-</span><span class="operator">></span>startAdvertising(<span class="type"><a href="qlowenergyadvertisingparameters.html">QLowEnergyAdvertisingParameters</a></span>()<span class="operator">,</span> advertisingData<span class="operator">,</span> advertisingData); }; <span class="type">QObject</span><span class="operator">::</span>connect(leController<span class="operator">.</span>data()<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qlowenergycontroller.html">QLowEnergyController</a></span><span class="operator">::</span>disconnected<span class="operator">,</span> reconnect); <span class="keyword">return</span> app<span class="operator">.</span>exec(); } </pre> </div> <!-- @@@heartrate-server/main.cpp --> </div> </div> </div> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2019 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners.<br/> The documentation provided herein is licensed under the terms of the <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation License version 1.3</a> as published by the Free Software Foundation.<br/> Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners. </p> </div> </body> </html>