ubuntu使用OPC UA搭建服务器与客户端(open62541库、QT、C++)

下载

https://github.com/open62541/open62541/releases/tag/v1.4.6

安装

解压后 创建bulid文件夹

进入bulid 打开终端

cmake ..
make
make install

安装到了 /usr/local

功能说明

该程序包含变量节点、对象节点、方法节点的创建及访问，服务器在多线程中运行，客户端有界面，可点击按钮查看打印信息进行测试。
编译之前 点掉对号

启动程序界面

此时服务器已自动启动，点击连接按钮后，客户端连接服务器成功，可点击其他按钮进行测试。

客户端工具 下载

https://pan.quark.cn/s/864a720f9d24

QT代码

pro

QT       += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

CONFIG += c++11
DESTDIR = $$PWD/bin
UI_DIR = $$PWD/UI
INCLUDEPATH += $$PWD/UI
# The following define makes your compiler emit warnings if you use
# any Qt feature that has been marked deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS
# You can also make your code fail to compile if it uses deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0

SOURCES += \
    main.cpp \
    opcserver.cpp \
    widget.cpp

HEADERS += \
    opcserver.h \
    widget.h

FORMS += \
    widget.ui


# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target


unix:!macx: LIBS += -L/usr/local/lib/ -lopen62541

INCLUDEPATH += /usr/local/lib
DEPENDPATH += /usr/local/lib

unix:!macx: PRE_TARGETDEPS += /usr/local/lib/libopen62541.a

客户端核心代码

.h

#ifndef WIDGET_H
#define WIDGET_H

#include <QWidget>
#include <open62541/client.h>
#include <open62541/client_config_default.h>
#include <open62541/client_highlevel.h>
QT_BEGIN_NAMESPACE
namespace Ui {
    class Widget; }
QT_END_NAMESPACE

class Widget : public QWidget
{
   
    Q_OBJECT

public:
    Widget(QWidget *parent = nullptr);
    ~Widget();

private slots:
    void on_pushButton_clicked();

    void on_pushButton_2_clicked();

    void on_pushButton_3_clicked();

    void on_pushButton_4_clicked();

    void on_pushButton_5_clicked();
private:
    void seeNode(UA_NodeId nodeId);
private:
    Ui::Widget *ui;
    UA_Client *client = nullptr;
};
#endif // WIDGET_H

.cpp

#include "widget.h"
#include "ui_widget.h"
#include "opcserver.h"
#include <stdio.h>
#include <QDebug>
Widget::Widget(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::Widget)
{
   
    ui->setupUi(this);

    opcServer *opcserver = new opcServer();
    opcserver->start();
}

Widget::~Widget()
{
   
    delete ui;
        UA_Client_delete(client); /* Disconnects the client internally */
}

void Widget::on_pushButton_2_clicked()
{
   
    /* Create a client and connect */
    client = UA_Client_new();
    UA_ClientConfig_setDefault(UA_Client_getConfig(client));
    UA_StatusCode status = UA_Client_connect(client, "opc.tcp://127.0.0.1:4841");
    if(status != UA_STATUSCODE_GOOD) {
   
        UA_Client_delete(client);
        qDebug()<<"连接"<<"失败";
        //return status;
    }
    else
    {
   
        qDebug()<<"连接"<<"成功";
    }
}


void Widget::on_pushButton_clicked()
{
   

    /* Read the value attribute of the node. UA_Client_readValueAttribute is a
     * wrapper for the raw read service available as UA_Client_Service_read. */
    UA_Variant value; /* Variants can hold scalar values and arrays of any type */
    UA_Variant_init(&value);
    UA_StatusCode status = UA_Client_readValueAttribute(client, UA_NODEID_STRING(1, "the.answer"), &value);
    qDebug()<<"status"<<status;
    if(status == UA_STATUSCODE_GOOD &&
       UA_Variant_hasScalarType(&value, &UA_TYPES[UA_TYPES_INT32])) {
   
        qDebug()<<"the value is:"<<*(UA_Int32*)value.data;
    }
    else
    {
   
        qDebug()<<"UA_Client_readValueAttribute"<<"失败";
    }

    /* Clean up */
    UA_Variant_clear(&value);

}



void Widget::on_pushButton_3_clicked()
{
   
    UA_Variant value; /* Variants can hold scalar values and arrays of any type */
    UA_Variant_init(&value);
    UA_StatusCode status = UA_Client_readValueAttribute(client, UA_NODEID_NUMERIC(0, 50906), &value);
    qDebug()<<"status"<<status;
    if(status == UA_STATUSCODE_GOOD /*&&
       UA_Variant_hasScalarType(&value, &UA_TYPES[UA_TYPES_INT32])*/) {
   
        qDebug()<<"the value is:"<<*(UA_Int32*)value.data;
    }
    else
    {
   
        qDebug()<<"UA_Client_readValueAttribute"<<"失败";
    }

    /* Clean up */
    UA_Variant_clear(&value);
}

void Widget::on_pushButton_4_clicked()
{
   

    /* Call a remote method */
    UA_Variant input;
    UA_String argString = UA_STRING("everyone");
    UA_Variant_init(&input);
    UA_Variant_setScalarCopy(&input, &argString, &UA_TYPES[UA_TYPES_STRING]);

    /* Call a remote method */
    UA_Variant input2;
    UA_String argString2 = UA_STRING("everyone2");
    UA_Variant_init(&input2);
    UA_Variant_setScalarCopy(&input2, &argString2, &UA_TYPES[UA_TYPES_STRING]);

    UA_Variant input_array[2]  = {
   input,input2};

    size_t outputSize;
    UA_Variant *output;
    UA_StatusCode retval = UA_Client_call(client, UA_NODEID_NUMERIC(0, UA_NS0ID_OBJECTSFOLDER),
                            UA_NODEID_NUMERIC(1, 62541), 2, input_array, &outputSize, &output);
    if(retval == UA_STATUSCODE_GOOD)
    {
   
        qDebug()<< "Method call was successful, and %lu returned values available"<<(unsigned long)outputSize;

        UA_String outString  = *(UA_String*)output[0].data;
        UA_String outString2  = *(UA_String*)output[1].data;
        //UA_String outString = *(UA_String*)output->data;
        qDebug()<< outString.length<<QByteArray((char*)outString.data);
        qDebug()<< outString2.length<<QByteArray((char*