OPC UA Demo Lab with Live Writes

How it works

 

This LoT Notebook connects Coreflux LoT to the Prosys public OPC UA SimulationServer and reads seven demo points every 2 seconds. The route publishes each DataValue as JSON, then actions fan it into a uniform topic tree and build a snapshot report for consumers.

Key features

• OPC UA route: Anonymous access to the public demo server with auto-accepted certificates.
• JSON envelopes: Publishes value, quality, source timestamp, and node address per point.
• Uniform point tree: Copies each reading into consistent points/<tag>/... topics.
• Writable switch: Publishes true/false to points/switch/write and writes back to the server.
• Snapshot model: Collapsed JSON report with all seven values and broker generation time.

What this template does

• Cycles through sinusoid, sawtooth, square, triangle, counter, tank level, and switch.
• Uses feed/opc/+ to digest every incoming envelope.
• Routes failed reads to feed/fetch_error.
• Publishes reports/snapshot once per cycle.

Prerequisites