QSerialPort Problem portName() sending empty string

mahmoud899

Hello, I want to start using the QSerialPort library but I am having some difficulties with it. I have downloaded the Qt Creator 5.1 and in the installation I have installed the qserialport library. I added "Qt += serialport" to my .pro file. I made a new console project and this is the code

@
#include <QCoreApplication>
#include <QSerialPort/QSerialPort>
#include <QSerialPort/QSerialPortInfo>
#include <QString>
#include <QTextStream>

int main( int argc, char *argv[])
{
QCoreApplication a(argc, argv);
QTextStream output(stdout);
QSerialPortInfo port;
QString portName;

     portName = port.portName();
     
     if ( portName.isEmpty())
     {
             output << "Empty String" << endl;
     }
     else
            output << portName << endl;

}
@

The problem here is that it prints out an "Empty String". I have looked into the Windows Device Manager and I have found that I have Communications Port(COM1) and Printer Port(LPT1). I am using Windows XP. Any suggestions on why the program is not printing the serial port name? Thank you

kuzulis

And you read documentation, looked examples? You itself understand, what you do? Otherwise I don't want to help you at all...

shrikantd

You need to provide name through the constructor for QSerialPortInfo() and should check for ports presence using isValid().
One can also enumerate through available ports using QSerialInfo::availablePorts()