OPCUA-IIoT-Crawler

OPC UA IIoT Crawler

Use the Crawler to browse OPC UA address spaces. It normally starts with a root folder or object by using an OPC UA Node-Id like i=85 (root->Objects), but that is not a good practice. Set up folders without crawling the server object and its types in depth.

Configuration

The filter tab inside the configuration section is used to filter crawling by properties. You can set your own or use some of the listed properties.

Examples

GitHub Crawler example flow

You’ll find the examples under Node-RED menu > Import > Examples > iiot opcua

Input

The input has to receive an addressSpaceItems (Array of objects) to browse for. A datatype or name is not required here - it just requires the nodeId in the addressSpaceItems objects here.

Filter:

• name => property name to search inside result per item
• value => regex string to match content

Output

The output returns either a structured JSON object with the requested data or the error messages from node-opcua.

Name

Name in the flow of Node-RED.

Set showErrors to get errors from node-opcua on browse.