TCP communication in QT

TcpCommunication.cpp

#include <QObject>
#include <QTcpServer>
#include <QTcpSocket>

/*
Tcp socket communication example

Note: the signal writeToSocket is used to write into the last opened socket
**/

class TcpCommunication : public QObject
{
    Q_OBJECT
public:
    explicit TcpCommunication(QObject *parent = nullptr);

private slots:
    void onError(QAbstractSocket::SocketError socketError);
    void onNewConnection();
private:
    QTcpServer *server;

signals:
    void writeToSocket(const QByteArray &ba);

};


TcpCommunication::TcpCommunication(QObject *parent) : QObject(parent)
{
    server = new QTcpServer(this);
    connect(server, &QTcpServer::newConnection, this, &TcpCommunication::onNewConnection);
    connect(server, &QTcpServer::acceptError, this, &TcpCommunication::onError);
    bool status = server->listen(QHostAddress::LocalHost, 54932);
    if(status){
        qInfo() << "TCP server listening on"
                << server->serverAddress().toString() << ":" << server->serverPort();
    }else{
        qWarning() << "Error, couldn't start TCP server";
    }

}

void TcpCommunication::onError(QAbstractSocket::SocketError socketError)
{
    qDebug() << "Socket Error:" << socketError;
}


void TcpCommunication::onNewConnection()
{
    QTcpSocket *socket = server->nextPendingConnection();
    connect(socket, &QTcpSocket::readyRead, [=](){
        qDebug() << "received from TCP:" << socket->read(1000);
        socket->write("ok");
    });
    connect(socket, &QTcpSocket::disconnected, [=]{
       qInfo() << "closing socket peer port: " << socket->peerPort();
       socket->deleteLater();
    });
    connect(this, &TcpCommunication::writeToSocket, [=](const QByteArray &data){
        if(socket->isOpen() && socket->isWritable())
            socket->write(data);
    });

}