Design and Implementation of a Dual-Mode Communication Control System Based on Low-Power Wide-Area Networks

Abstract

To address challenges in low-power wide-area network (LPWAN) technology for IoT education and practical applicationsincluding poor adaptability to single-mode communication scenarios, high device management complexity, and inadequate power control capabilitiesa low-power communication control system has been designed. Centered around the STM32L151C8T6 microcontroller, this system
integrates dual-mode communication modules for NB-IoT and LoRa. The LoRa module enables multi-node ad hoc local area networks, aggregating data from multiple slaves to a host, while the NB-IoT module facilitates centralized data transmission to the cloud. By implementing
an integrated scheduling mechanism combining local network aggregation with wide-area network upload, the system achieves seamless integration between public and private networks. Test results demonstrate that compared to standalone dual-communication networks, this integrated solution reduces device management complexity by 50% and enhances operational efficiency by over 40%. It reliably supports diverse
applications such as smart agriculture and IoT-based educational training, providing a viable approach for standardizing and scenario-specific
deployment of LPWAN technology.