This study investigates the potential of indoor light energy harvesting to power Bluetooth Low Energy (BLE) nodes for Internet of Things (IoT) applications by developing a system evaluated in indoor environments. Six solar cells of 3.66 cm2 each are used, yielding a total active surface of 22 cm2. A capacitor of 400 mF is used as energy storage. Results
suggest the system can harvest enough energy to power BLE nodes even in low-light conditions, though light variability may intermittently affect performance. The approach uses photovoltaic cells to capture ambient light, storing energy in a supercapacitor to ensure continuous node functionality during low-light periods. This method explores the feasibility of wireless data communication in so-called transient systems using the Bluetooth Low-Energy (BLE) protocol. This case study illustrates the effectiveness of a human presence detection system in managing diverse energy levels. It showcases the system’s capability to ensure reliable operation and emphasizes the potential for scalable IoT applications utilizing indoor light energy harvesting to maximize energy and minimize consumption.