Prototype and Platform Design

In indoor environments, various battery-powered Internet of Things (IoT) devices, such as remote controllers and electronic tags on high-level shelves, require efficient energy management. However, manually monitoring remaining energy levels and battery replacement is both inadequate and costly. This chapter introduces an energy management system for indoor IoT, which includes a mobile energy station (ES) for enabling on-demand wireless energy transfer (WET) in radio frequency (RF), some energy receivers (ERs), and a cloud server. By implementing a two-stage positioning system and embedding energy receivers into traditional IoT devices, we robustly manage their energy storage. The experimental results demonstrate that the energy receiver can harvest a minimum power of 58 mW.