I am getting an error QIODevice::read (QUdpSocket): device not open

ManiRon28

I am trying to create a UDP server , Client application
but it throws the error as QIODevice::read (QUdpSocket): device not open . Below is my code
, Kindly suggest what change should i do

server.cpp

QUdpSocket *socket;
socket = new QUdpSocket(this);
socket->bind(QHostAddress::Any, 1234);
connect(socket, SIGNAL(readyRead()), this, SLOT(readyRead()));

void CQudpSocket::writeData()
{
QString str = "Hello";
socket->writeDatagram(str.toLatin1().data(),str.length(),QHostAddress::Any,1234);
//socket->write(str.toLatin1().data(),str.length());
}
void CQudpSocket::readyRead()
{
QString str1;
socket->read(str1.toLatin1().data(),6);
emit sig_recvData(str1);
}

mainwindow.cpp

   MainWindow::MainWindow(QWidget *parent) :
   
       QMainWindow(parent),
   
       ui(new Ui::MainWindow)
   
   {
   ui->setupUi(this);
    connect(&udpsocket,SIGNAL(sig_recvData(QString)),this,SLOT(PrintLog(QString)));
   }
   MainWindow::~MainWindow()
   {
   delete ui;
   }
   void MainWindow::PrintLog(QString str)
   {
   ui->textEdit->append(str);
   }
   void MainWindow::on_pushButton_clicked()
   {
   udpsocket.writeData();
   }

client.cpp

 socket =  new QUdpSocket(this);
 connect(socket, SIGNAL(readyRead()), this, SLOT(readyRead()));

 void CQudpSocket::writeData()
 {
  QString str = "Hello";
 socket->writeDatagram(str.toLatin1().data(),str.length(),QHostAddress::LocalHost,1234);
 }
 void CQudpSocket::readyRead()
 {
 QString str1;
 socket->read(str1.toLatin1().data(),6);
 emit sig_recvData(str1);
 }
 
 void CQudpSocket::connectHost()
 {
 socket->connectToHost(QHostAddress::LocalHost, 1234);
 }

mainwindow.cpp

   MainWindow::MainWindow(QWidget *parent) :
  QMainWindow(parent),
ui(new Ui::MainWindow)
 {
ui->setupUi(this);
connect(&udpsocket,SIGNAL(sig_recvData(QString)),this,SLOT(PrintLog(QString)));
    }

 void MainWindow::on_pushButton_clicked()
 {
 udpsocket.writeData();
 }
 void MainWindow::PrintLog(QString str)
 {
 ui->textEdit->append(str);
 }
 void MainWindow::on_pushButton_2_clicked()
 {
 udpsocket.connectHost();
 }

Christian Ehrlicher

QUdpSocket receives datagrams which should be read with QUdpSocket::readDatagram(): https://doc.qt.io/qt-5/qudpsocket.html#details