PLC & Datalogger Integration via MQTT, Modbus & OPC UA

Sensor-Online is a flexible IoT platform designed to receive, process, and exchange data with PLC systems, dataloggers, and industrial control environments using widely adopted industrial protocols. By supporting MQTT, Modbus TCP, and OPC UA, Sensor-Online acts as a powerful integration layer between traditional industrial automation systems and modern IoT solutions.

Built to Integrate. Designed to Scale.

A Platform Built for Integration and Growth

By combining a secure API, bidirectional data flow, and support for AI and business logic, Sensor-Online enables scalable and future-proof IoT architectures.

The result is an integration-friendly platform where IoT data can be shared, enriched, and reused across the entire organization � securely, efficiently, and without vendor lock-in.

Receive Data from PLCs and Dataloggers

Sensor-Online functions as a centralized data hub, collecting measurements, status values, and process data from external systems and devices.

MQTT for real-time data from dataloggers and edge devices
Modbus TCP for integration with PLCs and industrial controllers
OPC UA for standardized and structured industrial communication

All incoming data is time-stamped, securely stored, and immediately available for dashboards, analytics, reporting, alarms, and automation.

Bidirectional Communication – Send Data Back to Industrial Systems

Integration in Sensor-Online is not limited to one-way data collection. The platform also supports sending data back to PLCs, SCADA systems, and external control environments.

Transfer processed sensor data to PLC or SCADA systems
Send calculated values, KPIs, and setpoints
Distribute configuration and control parameters
Enable closed-loop automation and control workflows

This bidirectional communication enables more advanced, responsive, and tightly integrated automation solutions.

MQTT for Efficient and Scalable Real-Time Data Exchange

MQTT is well suited for efficient, reliable data transfer from dataloggers, gateways, and industrial IoT devices.

Low bandwidth usage and high reliability
Publish/subscribe communication model
Ideal for distributed and large-scale deployments

Modbus TCP and OPC UA for Industrial Compatibility

For environments where PLCs and SCADA systems are central, Sensor-Online supports widely used industrial standards.

Modbus TCP for simple, proven PLC integration
OPC UA for secure, scalable, and structured communication
Consistent and standardized data models across systems

This ensures smooth interoperability between modern IoT platforms and existing industrial infrastructure.

A Central Integration Hub for IT, OT, and IoT

By supporting both inbound and outbound communication across multiple protocols, Sensor-Online becomes a central integration hub for IT, OT, and IoT systems.

Unify data from PLCs, dataloggers, and IoT sensors
Centralize logic, analytics, and configuration management
Reduce system complexity and integration effort
Enable scalable and future-proof architectures

The result is a highly flexible platform that enables seamless data exchange and long-term integration across industrial and IoT environments.

Ready to monitor smarter?

Let’s talk about how Sensor-Online can help your buildings, city, or project