A smart lighting system using wireless sensor actuator network

Indoor lighting accounts for 15-20% of the total energy consumption amongst electrical loads in residential buildings. This paper presents the design, implementation, and testing of a smart lighting system for better visual comfort, high reliability along with energy saving. Environmental conditions such as natural daylight, interior light intensity level, and occupancy state are gathered from distributed sensors. Based on sensors data, the microcontroller is programmed to control lighting intensity and to achieve better energy efficiency. Light-emitting diode (LED) dimmer circuit is designed to be controllable by the PWM signal of the microcontroller and is tested for different types of LED lamps. Dimmable LED lighting system incorporated with smart wireless sensor control is able to achieve a significant amount of energy saving.

I. Introduction

In recent years, increased usage of appliances such as air-conditioning and heating systems, lighting systems and entertainment systems has led to dramatic growth of electricity consumptions in residential and commercial buildings. Most of the electricity is generated by using fossil fuels which contribute to global warning. Energy consumption in the household has been growing in aggregate over time and there is a need to reduce electricity consumption to preserve natural resources. With increasing effect on global warming, energy conversation is one of the main objective of this generation to reduce the further negative impact on the environment.