Design of Home Automation System using IOT and SMS

Abstract

Humans regularly face security and economic challenges and this is more pronounced in our present society due to increase in crime rate such as housebreaking. Therefore, this project aims at solving this challenge by providing a monitoring and controlling device that alerts its user regardless of its location via Internet and SMS notification for security purposes. This work has five sections: Power Supply Unit, Controller Unit, Connectivity Unit, Relay Unit and Sensing Unit. The Power Supply Unit provides 12V and 5V to the electromechanical Relay Unit and Controller Unit, the Controller Unit composed of the Arduino Nano controls all functions including relays, sensors and Connectivity Unit; the Connectivity Unit connects the device to the Internet making sure that the Relay Unit is easily controlled via the Internet for turning ON or OFF devices. PIR Sensors and DHT11 are used to monitor motion, average temperature and humidity of the home. The prototype was tested in different locations to ascertain its efficiency and the result obtained showed greater efficiency at locations with highest signal strength.