Design and Implementation of a Secure Real-Time Remote Plant Monitoring System Using PLC and Industrial IoT Framework

Industrial processes can now be monitored and controlled in real time with increased efficiency, scalability, and security thanks to the quick development of Industrial Internet of Things (IIoT) technologies. The design and implementation of a secure real-time remote plant monitoring system utilising Programmable Logic Controllers (PLCs), Node-RED, Node-RED Dashboard, ZeroTier virtual networking, and the InfluxDB time-series database are presented in this paper. The system combines cloud-enabled visualisation, secure remote access, and industrial field devices. Node-RED serves as middleware for data collection, processing, and communication, while PLCs are used for real-time control. Time-series data is stored in InfluxDB, and real-time visualisation is offered by Node-RED Dashboard. Peer-to-peer networking across geographically dispersed systems is made secure by ZeroTier. The suggested system exhibits secure data transmission, low latency, and high reliability, making it appropriate for Industry 4.0 applications.