opcroak

An OPC-UA swiss-knife command-line tool.

Current version: 1.0.5

Lead Maintainer: Halim Qarroum

Table of contents

• Installation
• Features
• Description
• Usage
• Output streams
• Configuration
• See also

Install

npm install --global opcroak

Features

• Ability to create an Expressify server agent able to connect, browse, query and subscribe OPC-UA server(s) over MQTT.
• Recursive archiving of OPC-UA values using append-only output streams to dump notifications issued by variables.
• Support of OPC-UA request(s) throttling and buffered write(s) to output stream(s).
• Supports HTTP Proxy servers on the LAN to proxify MQTT connections.
• Supports Windows, Linux and MacOS.

Description

This command-line application is a handy tool for developers or administrators wanting to perform the following actions on their OPC-UA server(s) :

• Archive the data, in real-time, associated with the OPC-UA variables located in a given container. opcroak is able to recursively crawl the given container(s) and to monitor their associated variables. It can then push these data to Output streams.
• Extract the list of variable node identifiers located into one or more container(s) located on one or many OPC-UA server(s). This list can then be used later on by a client application to subscribe to the referenced variables efficiently.
• Provide an Expressify agent, connected to an MQTT server, allowing clients to interact with one or many OPC-UA server(s).

Usage

In this section, we are going to detail the different commands available by using opcroak as well as a guidance on how to use them with a configuration file.

Variable Archiving

This feature makes it possible to archive on an output stream the values associated with OPC-UA variables located in one or many OPC-UA containers on a remote OPC-UA server.

Output streams

Configuration

See also

• The green-opcua OPC-UA client for AWS Greengrass.
• The node-opcua module.