QSerialPort readyRead() signal not emited

[VrasI]

connect(serialScanner->serialPort, SIGNAL(readyRead()), serialScanner, SLOT(handleReadyRead()));

Why is it than with the respective serial port opened, my code never gets into the connected function that is handleReadyRead()?

The code below is my alternative implementation within the class constructor, so as everything has the same scope.

if (scanConnectedSerialDevices()){
       serialPort = new QSerialPort();
       portPath = serialPortName;
       serialPort->setPortName(portPath);
       qDebug()<<serialPort->portName();
       serialPort->setBaudRate(this->serialPortBaudeRate);
       connect(serialPort, SIGNAL(readyRead()), this, SLOT(handleReadyRead()));        
       connect(serialPort, SIGNAL(bytesWritten(qint64)), this, SLOT(handleBytesWritten(qint64)));
       serialPort.openPort(QIODevice::ReadOnly);

edit: Changing the Device, thus the Driver due to the scanner being from a different manufacturer my code works just fine??????

[jsulm]

@VrasI said in QSerialPort readyRead() signal not emited:

serialPort.openPort(QIODevice::ReadOnly);

What does it return?

[VrasI]

@jsulm It Returns TRUE. The port gets succesfully opened

[jsulm]

@VrasI I suggest to add error handling:
https://doc.qt.io/qt-5/qserialport.html#error-prop
https://doc.qt.io/qt-5/qserialport.html#errorOccurred
https://doc.qt.io/qt-5/qiodevice.html#errorString

[VrasI]

@jsulm I do use it... No error gets returned

[mrjj]

@VrasI
Hi
But if same code works with another scanner on same pc, doesn't that mean the
the first scanner is not really working?