Quick Secure CoAP Client Example

 // Copyright (C) 2019 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause

 #include "qmlcoapsecureclient.h"

 #include <QGuiApplication>
 #include <QNetworkInterface>
 #include <QQmlApplicationEngine>
 #include <QQmlContext>

 static QStringList availableHosts()
 {
     QStringList hosts;

     const auto networkInterfaces = QNetworkInterface::allInterfaces();
     for (const auto &interface : networkInterfaces)
         for (const auto &address : interface.addressEntries())
             hosts.push_back(address.ip().toString());

     return hosts;
 }

 int main(int argc, char *argv[])
 {
     QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
     QCoreApplication::setOrganizationName("Qt CoAP Example");

     QGuiApplication app(argc, argv);
     QQmlApplicationEngine engine;

     qmlRegisterType<QmlCoapSecureClient>("CoapSecureClient", 1, 0, "CoapSecureClient");

     // Register the QtCoap namespace
     qmlRegisterUncreatableMetaObject(QtCoap::staticMetaObject, "qtcoap.example.namespace", 1, 0,
                                      "QtCoap", "Access to enums is read-only");

     const QUrl url(QStringLiteral("qrc:/main.qml"));
     QObject::connect(&engine, &QQmlApplicationEngine::objectCreated,
                      &app, [url](QObject *obj, const QUrl &objUrl) {
         // Exit with error, if the object for main.qml could not be loaded.
         if (!obj && url == objUrl)
             QCoreApplication::exit(-1);
     }, Qt::QueuedConnection);

     engine.rootContext()->setContextProperty("hostsModel", availableHosts());

     engine.load(url);

     return app.exec();
 }