test_modem.cpp

#include <QtDebug>
#include <qofono-qt5/qofonomanager.h>
#include <qofono-qt5/qofonomodem.h>
#include <qofono-qt5/qofononetworkregistration.h>
#include <qofono-qt5/qofonosimmanager.h>

int main () {

    QOfonoManager *m_omanager = new QOfonoManager();
    m_omanager->getModems();
    QString defaultModemPath = m_omanager->defaultModem();
    qDebug() << "m_omanager->defaultModem()" << defaultModemPath;

    if (defaultModemPath == "") {
        qWarning() << "No modems detected";
        return 1;
    }

#if 0
    QOfonoModem *modem = new QOfonoModem(defaultModemPath);
#else
    QOfonoModem *modem = new QOfonoModem();
    modem->setModemPath(defaultModemPath);
#endif
    qDebug() << "modem->modemPath()" << modem->modemPath();
    qDebug() << "modem->name()" << modem->name();
    qDebug() << "modem->manufacturer()" << modem->manufacturer();
    qDebug() << "modem->isValid()" << modem->isValid();

}

test_modem.log

$ ./test_modem # #if 0 = using new QOfonoModem(defaultModemPath);

m_omanager->defaultModem() "/quectelqmi_0"
modem->modemPath() "/quectelqmi_0"
modem->name() ""
modem->manufacturer() "QUALCOMM INCORPORATED"
modem->isValid() true

$ ./test_modem # #if 0 = using modem->setModemPath(defaultModemPath) 

m_omanager->defaultModem() "/quectelqmi_0"
modem->modemPath() "/quectelqmi_0"
modem->name() ""
modem->manufacturer() ""
modem->isValid() false

test_simmanager.cpp

#include <QtDebug>
#include <qofono-qt5/qofonomanager.h>
#include <qofono-qt5/qofonomodem.h>
#include <qofono-qt5/qofononetworkregistration.h>
#include <qofono-qt5/qofonosimmanager.h>

int main () {

    QOfonoManager *m_omanager = new QOfonoManager();
    m_omanager->getModems();
    QString defaultModemPath = m_omanager->defaultModem();
    qDebug() << "m_omanager->defaultModem()" << defaultModemPath;

    if (defaultModemPath == "") {
        qWarning() << "No modems detected";
        return 1;
    }

    QOfonoModem modem(defaultModemPath);

    modem.setPowered(true);
    modem.setOnline(true);

    QOfonoSimManager* m_simManager = new QOfonoSimManager();
    m_simManager->setModemPath(defaultModemPath);

    if (!m_simManager->getPropertiesSync()) {
        qWarning() << "m_simManager->getPropertiesSync returned false";
    }

    qDebug() << "modem.modemPath()" << modem.modemPath();
    qDebug() << "modem.name()" << modem.name();
    qDebug() << "modem.manufacturer()" << modem.manufacturer();

    qDebug() << "modem.powered()" << modem.powered();
    qDebug() << "modem.online()" << modem.online();

    qDebug() << "m_simManager->isValid()" << m_simManager->isValid();
    qDebug() << "m_simManager->present()" << m_simManager->present();
    qDebug() << "m_simManager->pinRequired()" << m_simManager->pinRequired();
    qDebug() << "modemPath" << m_simManager->modemPath();
}

test_simmanager.log

m_omanager->defaultModem() "/quectelqmi_0"
m_simManager->getPropertiesSync returned false
modem.modemPath() "/quectelqmi_0"
modem.name() ""
modem.manufacturer() "QUALCOMM INCORPORATED"
modem.powered() true
modem.online() true
m_simManager->isValid() false
m_simManager->present() false
m_simManager->pinRequired() 0
modemPath "/quectelqmi_0"