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Industrial Connectivity Pattern

OPC UA to MQTT Gateway
for Scalable Industrial Data Flow

Proxus gives you an OPC UA to MQTT gateway that does more than relay tags. Browse industrial assets, map them into a clean topic structure, buffer through outages, and publish governed operational data into your Unified Namespace.

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Industrial connectivity workspace for OPC UA devices and MQTT publishing

Why teams look for an OPC UA to MQTT gateway

Most plants already expose valuable telemetry through OPC UA. The problem starts when you need that data in dashboards, analytics, UNS topics, or enterprise systems that work better with MQTT. A useful bridge must preserve structure, security, and delivery reliability, not just pass values from one protocol to another.

  • done
    Normalize once so OT, IT, dashboards, and AI all read the same topic model.
  • done
    Keep delivery outbound-only so plant-floor systems do not need inbound exposure.
  • done
    Survive WAN interruptions with local buffering and ordered replay at the edge.

Bridge outcomes

From
OPC UA nodes, folders, variable trees
To
MQTT topics aligned to site, line, asset, and metric
Result
Usable industrial data for dashboards, IT systems, and AI tools

Need a broader ingestion layer? Start with the Connectivity platform.

From OPC UA tags to usable MQTT topics

Proxus combines edge connectivity, topic mapping, and governance so the bridge becomes part of your operating model, not another one-off integration.

1. Browse and select

Connect to OPC UA servers, browse namespaces, and select only the tags, methods, or structures you want to expose.

2. Map into a shared model

Map signals into a governed MQTT hierarchy or UNS topic design so downstream systems stop depending on raw tag paths.

3. Publish reliably

Run the bridge at the edge with local buffering, health monitoring, and controlled outbound delivery to MQTT brokers.

Built for plant-floor reliability

A production bridge cannot fail every time a WAN link drops or a broker restarts. Proxus runs the bridge with edge-local resilience patterns that keep collection and delivery consistent.

  • cloud_off
    Store-and-forward protects telemetry during network outages.
  • shield_check
    Outbound-only architecture reduces attack surface for OT networks.
  • monitoring
    Central observability shows connection state, lag, and replay health.

Typical rollout

  1. 01 Connect an OPC UA endpoint on the edge gateway.
  2. 02 Map node paths into MQTT topics or a site-wide UNS structure.
  3. 03 Publish to your MQTT broker, cloud, or internal data consumers.
  4. 04 Reuse the same template across lines, plants, and OEM variants.

Factory dashboards

Feed MQTT topics into real-time dashboards without rewriting OPC UA browsing logic for every consumer.

Industrial data platforms

Bridge asset telemetry into an industrial data platform for storage, routing, and downstream integration.

IT and analytics consumers

Publish plant-floor context once, then fan it out to MES, ERP, lakes, and AI assistants through governed topics.

FAQ

Common questions buyers ask when evaluating an OPC UA to MQTT gateway.

Can Proxus publish raw node paths as MQTT topics?

Yes, but the stronger pattern is to map raw OPC UA structures into a stable industrial topic model before publishing.

Does the bridge run only in the cloud?

No. It runs at the edge so collection, buffering, and local resilience stay close to the process.

Can I use this with UNS and Sparkplug projects?

Yes. The bridge fits naturally into UNS-style topic hierarchies and broader MQTT-based industrial architectures.