Skeleton for modbus implementation

Barebones or empty classes added for foundation of modbus implementation.
Uses similar of architecture with CAN implementation.

Change-Id: I5cde9a04a040de1cf11dfd9f6a9c8bc9462a9299
Reviewed-by: Alex Blasche <alexander.blasche@theqtcompany.com>

19 files changed, 823 insertions, 3 deletions

diff --git a/examples/serialbus/modbus/main.cpp b/examples/serialbus/modbus/main.cpp
new file mode 100644
index 0000000..f23b403
--- /dev/null
+++ b/examples/serialbus/modbus/main.cpp
@@ -0,0 +1,51 @@
+/****************************************************************************
+**
+** Copyright (C) 2015 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the examples of the QtSerialBus module.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** 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."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "mainwindow.h"
+#include <QApplication>
+
+int main(int argc, char *argv[])
+{
+    QApplication a(argc, argv);
+    MainWindow w;
+    w.show();
+
+    return a.exec();
+}
diff --git a/examples/serialbus/modbus/mainwindow.cpp b/examples/serialbus/modbus/mainwindow.cpp
new file mode 100644
index 0000000..d258744
--- /dev/null
+++ b/examples/serialbus/modbus/mainwindow.cpp
@@ -0,0 +1,80 @@
+/****************************************************************************
+**
+** Copyright (C) 2015 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the examples of the QtSerialBus module.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** 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."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "mainwindow.h"
+#include "ui_mainwindow.h"
+
+#include <QtSerialBus>
+
+#include <QtCore/qbytearray.h>
+#include <QtCore/qdebug.h>
+
+MainWindow::MainWindow(QWidget *parent) :
+    QMainWindow(parent),
+    ui(new Ui::MainWindow)
+{
+    ui->setupUi(this);
+    init();
+}
+
+MainWindow::~MainWindow()
+{
+    delete ui;
+}
+
+void MainWindow::init()
+{
+    QPointer<QModBus> modBus = QModBus::instance();
+
+    plugins = modBus->plugins();
+    for (int i = 0; i < plugins.size(); i++)
+        ui->pluginBox->insertItem(i, plugins.at(i));
+
+}
+
+void MainWindow::connectDevice(int pluginIndex)
+{
+    QPointer<QModBus> modBus = QModBus::instance();
+
+    modBusDevice = modBus->createDevice(plugins.at(pluginIndex), "unused");
+
+    if (modBusDevice.isNull())
+        return;
+}
diff --git a/examples/serialbus/modbus/mainwindow.h b/examples/serialbus/modbus/mainwindow.h
new file mode 100644
index 0000000..0ee38fc
--- /dev/null
+++ b/examples/serialbus/modbus/mainwindow.h
@@ -0,0 +1,69 @@
+/****************************************************************************
+**
+** Copyright (C) 2015 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the examples of the QtSerialBus module.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** 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."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef MAINWINDOW_H
+#define MAINWINDOW_H
+
+#include <QMainWindow>
+#include <QModBusDevice>
+#include <QPointer>
+
+namespace Ui {
+class MainWindow;
+}
+
+class MainWindow : public QMainWindow
+{
+    Q_OBJECT
+
+public:
+    explicit MainWindow(QWidget *parent = 0);
+    ~MainWindow();
+
+private:
+    void init();
+    void connectDevice(int pluginIndex);
+
+    QList<QByteArray> plugins;
+    QPointer<QModBusDevice> modBusDevice;
+    Ui::MainWindow *ui;
+};
+
+#endif // MAINWINDOW_H
diff --git a/examples/serialbus/modbus/mainwindow.ui b/examples/serialbus/modbus/mainwindow.ui
new file mode 100644
index 0000000..872c176
--- /dev/null
+++ b/examples/serialbus/modbus/mainwindow.ui
@@ -0,0 +1,64 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>MainWindow</class>
+ <widget class="QMainWindow" name="MainWindow">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>400</width>
+    <height>300</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>MainWindow</string>
+  </property>
+  <widget class="QWidget" name="centralWidget">
+   <widget class="QComboBox" name="pluginBox">
+    <property name="geometry">
+     <rect>
+      <x>10</x>
+      <y>20</y>
+      <width>85</width>
+      <height>27</height>
+     </rect>
+    </property>
+   </widget>
+   <widget class="QLabel" name="label">
+    <property name="geometry">
+     <rect>
+      <x>10</x>
+      <y>0</y>
+      <width>67</width>
+      <height>17</height>
+     </rect>
+    </property>
+    <property name="text">
+     <string>Plugin</string>
+    </property>
+   </widget>
+  </widget>
+  <widget class="QMenuBar" name="menuBar">
+   <property name="geometry">
+    <rect>
+     <x>0</x>
+     <y>0</y>
+     <width>400</width>
+     <height>25</height>
+    </rect>
+   </property>
+  </widget>
+  <widget class="QToolBar" name="mainToolBar">
+   <attribute name="toolBarArea">
+    <enum>TopToolBarArea</enum>
+   </attribute>
+   <attribute name="toolBarBreak">
+    <bool>false</bool>
+   </attribute>
+  </widget>
+  <widget class="QStatusBar" name="statusBar"/>
+ </widget>
+ <layoutdefault spacing="6" margin="11"/>
+ <resources/>
+ <connections/>
+</ui>
diff --git a/examples/serialbus/modbus/modbus.pro b/examples/serialbus/modbus/modbus.pro
new file mode 100644
index 0000000..640ea85
--- /dev/null
+++ b/examples/serialbus/modbus/modbus.pro
@@ -0,0 +1,12 @@
+QT       += core gui serialbus widgets
+
+TARGET = modbus
+TEMPLATE = app
+
+
+SOURCES += main.cpp\
+        mainwindow.cpp
+
+HEADERS  += mainwindow.h
+
+FORMS    += mainwindow.ui
diff --git a/examples/serialbus/serialbus.pro b/examples/serialbus/serialbus.pro
index ad9457a..7010f4f 100644
--- a/examples/serialbus/serialbus.pro
+++ b/examples/serialbus/serialbus.pro
@@ -3,3 +3,7 @@ TEMPLATE = subdirs
 qtHaveModule(widgets) {
     SUBDIRS += can
 }
+
+qtHaveModule(widgets) {
+    SUBDIRS += modbus
+}
diff --git a/src/plugins/modbus/libmodbus/libmodbus.pro b/src/plugins/modbus/libmodbus/libmodbus.pro
new file mode 100644
index 0000000..a9e0a2c
--- /dev/null
+++ b/src/plugins/modbus/libmodbus/libmodbus.pro
@@ -0,0 +1,16 @@
+QT += core-private serialbus
+
+TARGET = qtmodbus
+
+PLUGIN_TYPE = modbus
+PLUGIN_EXTENDS = serialbus
+PLUGIN_CLASS_NAME = LibModBusPlugin
+load(qt_plugin)
+
+HEADERS += \
+    libmodbusbackend.h
+
+SOURCES += main.cpp \
+    libmodbusbackend.cpp
+
+OTHER_FILES = plugin.json
diff --git a/src/plugins/modbus/libmodbus/libmodbusbackend.cpp b/src/plugins/modbus/libmodbus/libmodbusbackend.cpp
new file mode 100644
index 0000000..2d787d2
--- /dev/null
+++ b/src/plugins/modbus/libmodbus/libmodbusbackend.cpp
@@ -0,0 +1,46 @@
+/****************************************************************************
+**
+** Copyright (C) 2015 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the QtSerialBus module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL3$
+** 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 http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPLv3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or later as published by the Free
+** Software Foundation and appearing in the file LICENSE.GPL included in
+** the packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 2.0 requirements will be
+** met: http://www.gnu.org/licenses/gpl-2.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "libmodbusbackend.h"
+
+QT_BEGIN_NAMESPACE
+
+LibModBusBackend::LibModBusBackend(const QString &name)
+{
+    Q_UNUSED(name);
+}
+
+QT_END_NAMESPACE
diff --git a/src/plugins/modbus/libmodbus/libmodbusbackend.h b/src/plugins/modbus/libmodbus/libmodbusbackend.h
new file mode 100644
index 0000000..c8dc5ce
--- /dev/null
+++ b/src/plugins/modbus/libmodbus/libmodbusbackend.h
@@ -0,0 +1,55 @@
+/****************************************************************************
+**
+** Copyright (C) 2015 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the QtSerialBus module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL3$
+** 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 http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPLv3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or later as published by the Free
+** Software Foundation and appearing in the file LICENSE.GPL included in
+** the packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 2.0 requirements will be
+** met: http://www.gnu.org/licenses/gpl-2.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef LIBMODBUSBACKEND_H
+#define LIBMODBUSBACKEND_H
+
+#include <QtSerialBus/qmodbusdevice.h>
+
+#include <QtCore/qstring.h>
+
+QT_BEGIN_NAMESPACE
+
+class LibModBusBackend : public QModBusDevice
+{
+    Q_OBJECT
+public:
+    explicit LibModBusBackend(const QString &name);
+};
+
+QT_END_NAMESPACE
+
+#endif // LIBMODBUSBACKEND_H
diff --git a/src/plugins/modbus/libmodbus/main.cpp b/src/plugins/modbus/libmodbus/main.cpp
new file mode 100644
index 0000000..66fb220
--- /dev/null
+++ b/src/plugins/modbus/libmodbus/main.cpp
@@ -0,0 +1,65 @@
+/****************************************************************************
+**
+** Copyright (C) 2015 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the QtSerialBus module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL3$
+** 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 http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPLv3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or later as published by the Free
+** Software Foundation and appearing in the file LICENSE.GPL included in
+** the packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 2.0 requirements will be
+** met: http://www.gnu.org/licenses/gpl-2.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "libmodbusbackend.h"
+
+#include <QtSerialBus/qmodbus.h>
+#include <QtSerialBus/qmodbusdevice.h>
+#include <QtSerialBus/qmodbusfactory.h>
+
+#include <QtCore/qfile.h>
+#include <QtCore/qdebug.h>
+
+QT_BEGIN_NAMESPACE
+
+class ModBusPlugin : public QObject, public QModBusFactory
+{
+    Q_OBJECT
+    Q_PLUGIN_METADATA(IID "org.qt-project.Qt.QModBusFactory" FILE "plugin.json")
+    Q_INTERFACES(QModBusFactory)
+
+
+public:
+    QModBusDevice *createDevice(const QString &interfaceName) const
+    {
+        QModBusDevice *device = new LibModBusBackend(interfaceName);
+        return device;
+    }
+};
+
+QT_END_NAMESPACE
+
+#include "main.moc"
diff --git a/src/plugins/modbus/libmodbus/plugin.json b/src/plugins/modbus/libmodbus/plugin.json
new file mode 100644
index 0000000..07d7cf8
--- /dev/null
+++ b/src/plugins/modbus/libmodbus/plugin.json
@@ -0,0 +1,3 @@
+{
+    "Key": "libmodbus"
+}
diff --git a/src/plugins/modbus/modbus.pro b/src/plugins/modbus/modbus.pro
new file mode 100644
index 0000000..cc78c8f
--- /dev/null
+++ b/src/plugins/modbus/modbus.pro
@@ -0,0 +1,3 @@
+TEMPLATE = subdirs
+
+SUBDIRS += libmodbus
diff --git a/src/plugins/plugins.pro b/src/plugins/plugins.pro
index 9d64723..456289e 100644
--- a/src/plugins/plugins.pro
+++ b/src/plugins/plugins.pro
@@ -1,2 +1,3 @@
 TEMPLATE = subdirs
+
 SUBDIRS += canbus
diff --git a/src/serialbus/qmodbus.cpp b/src/serialbus/qmodbus.cpp
new file mode 100644
index 0000000..ae8a18f
--- /dev/null
+++ b/src/serialbus/qmodbus.cpp
@@ -0,0 +1,122 @@
+/****************************************************************************
+**
+** Copyright (C) 2015 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the QtSerialBus module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL3$
+** 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 http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPLv3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or later as published by the Free
+** Software Foundation and appearing in the file LICENSE.GPL included in
+** the packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 2.0 requirements will be
+** met: http://www.gnu.org/licenses/gpl-2.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qmodbus.h"
+#include "qmodbusfactory.h"
+
+#include <QtCore/qpluginloader.h>
+#include <QtCore/qglobalstatic.h>
+
+#include <private/qfactoryloader_p.h>
+#include <private/qlibrary_p.h>
+
+#define QModBusFactory_iid "org.qt-project.Qt.QModBusFactory"
+
+QT_BEGIN_NAMESPACE
+
+struct QModBusPrivate
+{
+public:
+    QModBusPrivate() : factory(Q_NULLPTR), index(-1) { }
+
+    QJsonObject meta;
+    QModBusFactory *factory;
+    int index;
+};
+
+Q_GLOBAL_STATIC_WITH_ARGS(QFactoryLoader, qFactoryLoader,
+    (QModBusFactory_iid, QLatin1String("/modbus")))
+
+typedef QHash<QByteArray, QModBusPrivate> QModBusPluginStore;
+Q_GLOBAL_STATIC(QModBusPluginStore, qModBusPlugins)
+
+static QModBus *globalInstance = Q_NULLPTR;
+
+static void loadPlugins()
+{
+    const QList<QJsonObject> meta = qFactoryLoader()->metaData();
+    for (int i = 0; i < meta.count(); i++) {
+        const QJsonObject obj = meta.at(i).value(QStringLiteral("MetaData")).toObject();
+        if (obj.isEmpty())
+            continue;
+
+        QModBusPrivate d;
+        d.index = i;
+        d.meta = obj;
+        qModBusPlugins()->insert(
+                    obj.value(QStringLiteral("Key")).toString().toLatin1(), d);
+    }
+}
+
+QModBus *QModBus::instance()
+{
+    if (!globalInstance)
+        globalInstance = new QModBus();
+    return globalInstance;
+}
+
+QList<QByteArray> QModBus::plugins() const
+{
+    return qModBusPlugins()->keys();
+}
+
+QModBusDevice *QModBus::createDevice(const QByteArray &plugin,
+                            const QString &interfaceName) const
+{
+    if (!qModBusPlugins()->contains(plugin))
+        return Q_NULLPTR;
+
+    QModBusPrivate d = qModBusPlugins()->value(plugin);
+    if (!d.factory) {
+        d.factory
+            = qobject_cast<QModBusFactory *>(qFactoryLoader->instance(d.index));
+        if (!d.factory)
+            return Q_NULLPTR;
+
+        qModBusPlugins()->insert(plugin, d);
+    }
+    if (!d.factory)
+        return Q_NULLPTR;
+
+    return d.factory->createDevice(interfaceName);}
+
+QModBus::QModBus(QObject *parent) :
+    QObject(parent)
+{
+    loadPlugins();
+}
+
+QT_END_NAMESPACE
diff --git a/src/serialbus/qmodbus.h b/src/serialbus/qmodbus.h
new file mode 100644
index 0000000..74e3e02
--- /dev/null
+++ b/src/serialbus/qmodbus.h
@@ -0,0 +1,65 @@
+/****************************************************************************
+**
+** Copyright (C) 2015 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the QtSerialBus module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL3$
+** 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 http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPLv3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or later as published by the Free
+** Software Foundation and appearing in the file LICENSE.GPL included in
+** the packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 2.0 requirements will be
+** met: http://www.gnu.org/licenses/gpl-2.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QMODBUS_H
+#define QMODBUS_H
+
+#include <QtSerialBus/qserialbusglobal.h>
+#include <QtSerialBus/qmodbusdevice.h>
+
+#include <QtCore/qobject.h>
+
+QT_BEGIN_NAMESPACE
+
+class Q_SERIALBUS_EXPORT QModBus : public QObject
+{
+    Q_OBJECT
+public:
+    static QModBus *instance();
+    QList<QByteArray> plugins() const;
+
+    QModBusDevice *createDevice(const QByteArray &plugin,
+                       const QString &interfaceName) const;
+
+private:
+    QModBus(QObject *parent = 0);
+
+    Q_DISABLE_COPY(QModBus)
+};
+
+QT_END_NAMESPACE
+
+#endif // QMODBUS_H
diff --git a/src/serialbus/qmodbusdevice.cpp b/src/serialbus/qmodbusdevice.cpp
new file mode 100644
index 0000000..ff498af
--- /dev/null
+++ b/src/serialbus/qmodbusdevice.cpp
@@ -0,0 +1,46 @@
+/****************************************************************************
+**
+** Copyright (C) 2015 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the QtSerialBus module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL3$
+** 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 http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPLv3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or later as published by the Free
+** Software Foundation and appearing in the file LICENSE.GPL included in
+** the packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 2.0 requirements will be
+** met: http://www.gnu.org/licenses/gpl-2.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qmodbusdevice.h"
+
+QT_BEGIN_NAMESPACE
+
+QModBusDevice::QModBusDevice(QObject *parent) :
+    QObject(parent)
+{
+}
+
+QT_END_NAMESPACE
diff --git a/src/serialbus/qmodbusdevice.h b/src/serialbus/qmodbusdevice.h
new file mode 100644
index 0000000..e3bebea
--- /dev/null
+++ b/src/serialbus/qmodbusdevice.h
@@ -0,0 +1,54 @@
+/****************************************************************************
+**
+** Copyright (C) 2015 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the QtSerialBus module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL3$
+** 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 http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPLv3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or later as published by the Free
+** Software Foundation and appearing in the file LICENSE.GPL included in
+** the packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 2.0 requirements will be
+** met: http://www.gnu.org/licenses/gpl-2.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QMODBUSDEVICE_H
+#define QMODBUSDEVICE_H
+
+#include <QtSerialBus/qserialbusglobal.h>
+
+#include <QtCore/qobject.h>
+
+QT_BEGIN_NAMESPACE
+
+class Q_SERIALBUS_EXPORT QModBusDevice : public QObject
+{
+    Q_OBJECT
+public:
+    explicit QModBusDevice(QObject *parent = 0);
+};
+
+QT_END_NAMESPACE
+#endif // QMODBUSDEVICE_H
diff --git a/src/serialbus/qmodbusfactory.h b/src/serialbus/qmodbusfactory.h
new file mode 100644
index 0000000..ff901f7
--- /dev/null
+++ b/src/serialbus/qmodbusfactory.h
@@ -0,0 +1,59 @@
+/****************************************************************************
+**
+** Copyright (C) 2015 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the QtSerialBus module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL3$
+** 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 http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPLv3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or later as published by the Free
+** Software Foundation and appearing in the file LICENSE.GPL included in
+** the packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 2.0 requirements will be
+** met: http://www.gnu.org/licenses/gpl-2.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QMODBUSFACTORY_H
+#define QMODBUSFACTORY_H
+
+#include <QtSerialBus/qserialbusglobal.h>
+#include <QtSerialBus/qmodbusdevice.h>
+
+#include <QtCore/qstringlist.h>
+
+QT_BEGIN_NAMESPACE
+
+class Q_SERIALBUS_EXPORT QModBusFactory
+{
+public:
+    virtual QModBusDevice *createDevice(const QString &interfaceName) const = 0;
+protected:
+    virtual ~QModBusFactory() {}
+};
+
+Q_DECLARE_INTERFACE(QModBusFactory, "org.qt-project.Qt.QModBusFactory")
+
+QT_END_NAMESPACE
+
+#endif // QMODBUSFACTORY_H
diff --git a/src/serialbus/serialbus.pro b/src/serialbus/serialbus.pro
index e65eb62..6ac0473 100644
--- a/src/serialbus/serialbus.pro
+++ b/src/serialbus/serialbus.pro
@@ -14,7 +14,10 @@ PUBLIC_HEADERS += \
     qcanbusframe.h \
     qcanbus.h \
     qserialbusglobal.h \
-    qcanbusfactory.h
+    qcanbusfactory.h \
+    qmodbus.h \
+    qmodbusdevice.h \
+    qmodbusfactory.h \
 
 PRIVATE_HEADERS += \
     qcanbusdevice_p.h \
@@ -23,6 +26,8 @@ SOURCES += \
     qcanbusdevice.cpp \
     qcanbus.cpp \
     qcanbusfactory.cpp \
-    qcanbusframe.cpp
+    qcanbusframe.cpp \
+    qmodbus.cpp \
+    qmodbusdevice.cpp
 
-HEADERS += $$PUBLIC_HEADERS $$PRIVATE_HEADERS
+HEADERS += $$PUBLIC_HEADERS $$PRIVATE_HEADERS \