MODBUS/DNP3 OVER TCP/IP IMPLEMENTATION ON TMDSCNCD28388D AND ARDUINO WITH SIMULINK HMI FOR IOT-BASED CYBERSECURE ELECTRICAL SYSTEMS

Abstract

The implementation of Modbus and DNP3 (Distributed Network Protocol) over TCP/IP represents a significant advancement in integrating industrial communication standards with modern IoT-based control and cybersecurity frameworks. This study presents a dual-platform experimental implementation of these protocols using the Texas Instruments TMDSCNCD28388D controlCARD and the Arduino Uno, each interfaced with a Simulink-based Human–Machine Interface (HMI). The system architecture enables seamless data exchange between field devices and supervisory applications over Ethernet, supporting real-time monitoring, remote actuation, and secure data acquisition. The TMDSCNCD28388D, equipped with a dual-core C2000 microcontroller and integrated F28388D processor, provides deterministic control for industrial nodes, while the Arduino Uno serves as a low-cost alternative for small-scale IoT testbeds. Both implementations employ Simulink models for system design, simulation, and code generation, ensuring modularity and platform independence. The study emphasizes the integration of industrial automation and IoT protocols within a cybersecurity-aware framework. A layered encryption model was incorporated into TCP/IP communication to evaluate data confidentiality, integrity, and resilience against common cyber threats such as spoofing and denial-of-service attacks. The Simulink HMI acts as both a visualization and command layer, enabling real-time supervisory control and anomaly detection through embedded MATLAB scripts and dashboard logic. Experimental results demonstrate high communication reliability, with Modbus achieving faster request–response cycles under low-load conditions, while DNP3 exhibited greater robustness against packet loss and network interference. The hybrid approach validates the feasibility of deploying standardized SCADA protocols in distributed IoT environments, supporting industrial cyber-physical systems where interoperability and security are critical. This work contributes to the evolving field of cyber-secure industrial automation by demonstrating an end-to-end methodology for implementing Modbus/DNP3 over TCP/IP using embedded microcontrollers and model-based design tools. The outcomes highlight the importance of integrating communication protocols, cybersecurity measures, and model-based engineering to develop resilient, intelligent, and scalable industrial IoT architectures.