Example for QNmeaPositionInfoSource

clientapplication.cpp

// Copyright (C) 2017 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include <QtCore>
#include <QNmeaPositionInfoSource>
#include <QSerialPort>
#include <QTextEdit>

#include "clientapplication.h"

ClientApplication::ClientApplication(QWidget *parent)
    : QMainWindow(parent)
{
    textEdit = new QTextEdit;
    setCentralWidget(textEdit);

    QNmeaPositionInfoSource *source = new QNmeaPositionInfoSource(QNmeaPositionInfoSource::RealTimeMode, this);
    QSerialPort *serialport = new QSerialPort(this);
    serialport->setPortName("ttyACM0");
    serialport->setBaudRate(9600);
    serialport->setDataBits(QSerialPort::Data5);
    serialport->setParity(QSerialPort::Parity::NoParity);
    serialport->setStopBits(QSerialPort::StopBits::OneStop);
    serialport->setFlowControl(QSerialPort::FlowControl::NoFlowControl);
    serialport->open(QIODevice::ReadOnly);
    source->setDevice(serialport);
    source->startUpdates();
    connect(source, SIGNAL(positionUpdated(QGeoPositionInfo)),
            this, SLOT(positionUpdated(QGeoPositionInfo)));

    source->setPreferredPositioningMethods(QGeoPositionInfoSource::SatellitePositioningMethods);
    source->setUserEquivalentRangeError(5.1);
    source->setUpdateInterval(1000);
    source->startUpdates();
}

void ClientApplication::positionUpdated(const QGeoPositionInfo &info)
{
    textEdit->append(QString("Position updated: Date/time = %1, Coordinate = %2").arg(info.timestamp().toString()).arg(info.coordinate().toString()));
}

clientapplication.h

// Copyright (C) 2017 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#ifndef CLIENTAPPLICATION_H
#define CLIENTAPPLICATION_H

#include <QMainWindow>

QT_BEGIN_NAMESPACE
class QGeoPositionInfo;
class QTextEdit;
QT_END_NAMESPACE

class ClientApplication : public QMainWindow
{
    Q_OBJECT
public:
    ClientApplication(QWidget *parent = 0);

private slots:
    void positionUpdated(const QGeoPositionInfo &info);

private:
    QTextEdit *textEdit;
};

#endif

geopositionsource.pro

TEMPLATE = app
TARGET = geopositionsource
QT = positioning core widgets serialport


HEADERS = clientapplication.h
SOURCES = clientapplication.cpp \
          main.cpp

RESOURCES += \
    logfile.qrc

INSTALLS += target

main.cpp

// Copyright (C) 2017 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include <QApplication>

#include "clientapplication.h"

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);

    ClientApplication client;
    client.show();

    return app.exec();
}