Development of a Connection Node in a Li-Fi Network for Smart Environment Systems

Abstract

The article presents the development of a connection node in a Li-Fi/Wi-Fi hybrid network designed for smart environment monitoring and management systems. Transmitter and receiver nodes are implemented using optical communication modules. The On-Off Keying (OOK) modulation scheme is applied in combination with the UART 8N1 protocol and an adaptive two-level calibration method to reduce the impact of varying ambient lighting conditions. The system ensures a complete data exchange cycle, including transmission, reception, and acknowledgment mechanisms. The proposed architecture demonstrates effective performance in terms of reliable communication and stable signal transmission. The architecture is designed as a scalable structure supporting multi-node networks and routing capabilities. This approach enables Li-Fi technology to be used locally for high-speed optical data exchange between neighboring nodes, while Wi-Fi provides global integration with external networks and cloud services. Thus, the system ensures efficient and flexible operation within a hybrid communication environment. The proposed prototype is built on microcontroller-based components and offers a cost-effective implementation. Furthermore, the system can be extended for use in more complex IoT infrastructures. The study shows that Li-Fi-based hybrid approaches have strong potential in smart systems and serve as a foundation for future developments in this field.