QTOpcUa -- connectToEndPoint Error

TMJJ001

Dear all,

I'm probably doing something stupid. I'm trying the first time to connect to OPC UA server.
I'm following the below tutorial from QT:
https://www.youtube.com/watch?v=p4MNmzkxsq0&t=2109s

@ 30 min he is writting :

m_client->connectToEndpoint(QUrl("opc.tcp://localhost:4840"));

When I try to, I always get the next error:

error: no viable conversion from 'QUrl' to 'const QOpcUaEndpointDescription'

Can somebody explain me what could be wrong? So I can learn from it?
Below the code .

#ifndef MACHINESTATE_H
#define MACHINESTATE_H

#include <QObject>
#include <QScopedPointer>
#include <QtOpcUa>

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


signals:

public slots:
    void onStateChanged(QOpcUaClient::ClientState state);

private:
    QScopedPointer<QOpcUaClient> m_client;
    QScopedPointer<QOpcUaNode> m_statusNode;
};

#endif // MACHINESTATE_H

#include "machinestate.h"
#include <QDebug>
#include <QUrl>

machinestate::machinestate(QObject *parent) : QObject(parent)
{

    QOpcUaProvider provider;
    qDebug() << provider.availableBackends();

    m_client.reset(provider.createClient("open62541"));
    qDebug() << m_client.data();

    connect(m_client.data(), &QOpcUaClient::stateChanged, this, &machinestate::onStateChanged);

    m_client->connectToEndpoint(QUrl("opc.tcp://localhost:4840"));

}

void machinestate::onStateChanged(QOpcUaClient::ClientState state)
{
    qDebug() << state;
}

I'm using Qt5.13.0.

Thanks in advance,
Kind regards.

jsulm

@TMJJ001 said in QTOpcUa -- connectToEndPoint Error:

error: no viable conversion from 'QUrl' to 'const QOpcUaEndpointDescription'

The error tells you what is wrong: QUrl cannot be implicitly converted to QOpcUaEndpointDescription.
https://doc-snapshots.qt.io/qtopcua/qopcuaclient.html#connectToEndpoint takes a QOpcUaEndpointDescription not QUrl.
Create a QOpcUaEndpointDescription and pass it to connectToEndpoint.

thisisseven

Do not use QUrl.
m_client->connectToEndpoint("opc.tcp://localhost:4840");

ODБOï

@thisisseven it will fail also! As @jsulm said QOpcUaClient::connectToEndpoint takes a QOpcUaEndpointDescription

thisisseven

@LeLev

QOpcUaProvider *provider=new QOpcUaProvider(this);
m_client = provider->createClient("open62541");
if(!m_client){
qDebug()<<"error";
}
m_client->connectToEndpoint("opc.tcp://localhost:4840");

Check out the article below.
https://doc-snapshots.qt.io/qtopcua/qtopcua-opcuaviewer-example.html

ODБOï

@thisisseven said in QTOpcUa -- connectToEndPoint Error:

"opc.tcp://localhost:4840"

https://doc-snapshots.qt.io/qtopcua/qopcuaclient.html#connectToEndpoint
https://doc-snapshots.qt.io/qtopcua/qopcuaclient.html#usage