Industrial monitoring and control

Context: Industry 4.0 Technologies, Master of Engineering, RMIT
Team: Individual
When: 2023
Discipline: Manufacturing, Embedded

Node-RED dashboard with temperature and humidity gauges

Virtual PLC logic in Structured Text, wired to a Node-RED dashboard over Modbus and MQTT, from sensor to screen.

A full data path from acquisition through control to display. Emulated DHT11 temperature and humidity sensors publish over MQTT, an OpenPLC runtime exchanges registers over Modbus TCP, and a Node-RED dashboard shows gauges, trends and controls.

What I did

Programmed virtual PLC logic in Structured Text with OpenPLC and e!COCKPIT, configuring digital and analogue I/O addressing and implementing temperature-based control.
Integrated the PLC with Node-RED over Modbus and built a dashboard of gauges, charts, buttons and sliders.
Used sensor emulation and MQTT topics to demonstrate the whole path from acquisition to display.

From the bench

Live temperature and humidity trend on the dashboard
Node-RED flow: DHT11 sensor, Modbus PLC and MQTT topics
Structured Text: level-triggered toggle and bit-shifted outputs
OpenPLC runtime running the room-temperature program