Abstract
In urban environments, traditional streetlight systems face challenges such as limited remote management capabilities and the use of outdated lighting technologies, resulting in energy inefficiencies and operational constraints. This project focuses on addressing these challenges by developing a LED-powered street lighting system that integrates LoRa technology and a web server interface. The network architecture adopts a master-slave configuration, where the master server controls three 35 W LED luminaries, functioning as slave units, with the following specifications: 6500K Correlated Color Temperature (CCT), 4200 lumens, and an energy efficiency of 120 Lumens/Watt. LoRa technology facilitates low data rate transmission over a considerable distance, enabling efficient communication between the units. Through a web server, the master unit establishes an access point that is WiFi-enabled, allowing users to view and manually configure the smart street lighting system. The web server interface allows users to visualize and manually control the streetlights, providing information on the state of LED luminaires, temperature, humidity, and connectivity between the master and slave units. The slave units, controlled by NodeMCU ESP32, operate on a 12-hour cycling interval and can receive commands from users or the master unit. Distance testing, energy efficiency calculations, and automated switching tests—including a 13-hour night test to ensure the device functions effectively and identify defects for future development—are used to evaluate the system's performance. The distance test results show steady connections behind walls and in open areas up to specific distances. LED luminaires are a cost-effective option because energy efficiency comparisons demonstrate a significant reduction in power usage when compared to classic High-Pressure Sodium luminaires. It is advised to add cameras for real-time vision-based monitoring, expand coverage with additional master units, and incorporate data logging and brightness control functions. Furthermore, remote switching outside the access point of the master unit can be accomplished by integrating a cloud server with strong security measures.
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