To help you get started, we've collected the most common ways that node-opcua-data-value is being used within popular public projects.

node-opcua / node-opcua / test / helpers / helpers.ts View on Github

value: number | boolean | null,
    statusCode: StatusCode
): DataValue {
    // setup data
    const sourceTimestamp = makeDate(time);

    if (value === undefined || value === null) {

        return new DataValue({
            sourceTimestamp,
            statusCode,
            value: undefined,
        });

    } else if (typeof value === "boolean") {
        return new DataValue({
            sourceTimestamp,
            statusCode,
            value: {dataType: DataType.Boolean, value},
        });

    } else {
        return new DataValue({
            sourceTimestamp,
            statusCode,
            value: {dataType: DataType.Float, value},
        });
    }
}

View more ways to use node-opcua-data-value

node-opcua

node-opcua is a full OPC UA stack for NodeJS and the Browser written in Typescript.

Node-opcua is the OPC-UA stack running on NodeJS.

Why NodeJS ?

Because NodeJs is a great framework for designing high-performing asynchronous applications.

Getting started

installing node-opcua as a node package

$ mkdir mytest
$ cd mytest
$ npm init 
$ npm install node-opcua --unsafe-perms
$ # Create your first app.js file!

installing node-opcua samples as a node package

$ mkdir myserver
$ cd myserver
$ npm init
$ npm install node-opcua-samples --unsafe-perms
$ ./node_modules/.bin/simple_server

or

$ ./node_modules/.bin/simple_client  -e "opc.tcp://opcserver.mAutomation.net:4841" -n="ns=1;s=EVR2.system.RTC_SEC"

or

$ ./node_modules/.bin/simple_client  -e "opc.tcp://opcuademo.sterfive.com:26543" 

Minimum Nodejs requirement

• Nodejs version 18 or above

tutorials and guided examples

. This book provides a large number of practical and ready-to-use and fully documented examples. It's the best starting point to learn about node-opcua.

Sponsors & Backers

The funding of node-opcua entirely relies on its users.
We appreciate that, once you have evaluated the software and you have decided to use it in one of your applications, you consider supporting our effort by either financially contributing to one of our sponsor programs:

• https://github.com/sponsors/node-opcua
• https://opencollective.com/node-opcua

Grants ensure the following:

• 🔨 Long-term maintenance of the project
• ⚙️ maintain the website and continuous integration platform
• 🛣 Progress on the road map
• 🐛 Quick responses to bug reports
• 🚀 New features & enhancements
• ⚖️ representing the node-opcua user community at the OPC Foundation

Sponsors

Backers

Thank you to all our backers! Become a backer

Contributors

This project exists thanks to all the people who contribute.

Getting professional support

To get professional support, consider subscribing to the node-opcua membership community:

Registered members have access to an extended set of online documentation.

Registered members can post and query Sterfive for any question related to NodeOPCUA in a private chat room.

or contact sterfive for dedicated consulting and more advanced support or for a certified version of node-opcua. (contact@sterfive.com).

Road-map

If your company would like to participate and influence the development of future versions of node-opcua please contact sterfive.

Those are the items we would like to achieve in the next version of the API.

• improved documentation
• Compliance testing and certification (CTT)
• Pub-sub support
• support for redundancy
• session-less transactions
• WebSocket transport
• JTokens and OAuth
• reversed connection
• more tutorials

Advanced topics

installing node-opcua from source

running the demo server from source

 $ git clone https://github.com/node-opcua/node-opcua.git
 $ cd node-opcua
 $ npm install -g pnpm 
 $ pnpm recursive install
 $ pnpm build
 $ node packages/node-opcua-samples/bin/simple_server

running the demo client from source

 $ git clone https://github.com/node-opcua/node-opcua.git
 $ cd node-opcua
 $ npm install -g pnpm 
 $ pnpm recursive install
 $ pnpm build
 $ node packages/node-opcua-samples/bin/simple_client.js -e "opc.tcp://opcserver.mAutomation.net:4841" -n="ns=1;s=EVR2.system.RTC_SEC"

Tutorials

• create a server

• create a client in typescript

• more tutorials are available in the book (https://leanpub.com/node-opcuabyexample-edition2024)

• more advanced examples and training material are available for the NodeOPCUA Subscription members at (https://support.sterfive.com)

API reference

• check out the API documentation

Contributing

$ git clone git://github.com/node-opcua/node-opcua.git
$ cd node-opcua
$ npm install -g pnpm 
$ pnpm install
$ pnpm recursive install
$ pnpm build

Supported Features

Feedback

• if you're using node-opcua in one of your project, please feel free to leave a comment and a quick description in the wiki

• if you have a particular wish or found a issue, let us known and create an issue

About licensing

The node-opcua core module is copyrighted and licencsd under the term of the "The MIT License".

This means that :

• node-opcua comes without any warranty of any kind.
• you can freely re-use in an open-source application or a commercial application
• you have to include the software copyright notice in all copies or substantial portions of the software.

You are strongly encouraged to apply to our NodeOPCUA Membership to get additional benefits and support.

Copyright

Copyright (c) 2022-2024 Sterfive SAS - 833264583 RCS ORLEANS - France (https://www.sterfive.com) Copyright (c) 2014-2022 Etienne Rossignon