This project seeks to reduce the expenses associated with home construction while simultaneously enhancing long-term energy efficiency by developing and utilizing vacancy-aware batteryless wireless electrical switches. These battery-free wireless switches eliminate the need for extensive house wiring, enabling remote control of lights and appliances without physical connections. This innovation has the potential to reduce wiring material and labour costs by up to fifty percent. Moreover, the integration of vacancy sensors facilitates the directed allocation of energy to occupied areas within residential buildings, thereby enhancing energy efficiency throughout the buildings' lifespan.