Design and Implementation of Wi-Fi based Smart Home Automation System

Abstract

With cities growing at fast pace with the blend of ever evolving technology, it appears everything will be connected to the internet in the coming days, with an estimated 11 billion devices already; excluding the smart phones and laptops. The aim of this research is to study the various technologies and build a smart home automation system with a low cost, which can be accepted readily. Its focus is to improve the standard of living of an average man. IoT is being used which is still in its evolving stage to build a smart home where all the electrical devices are connected to the internet and can be accessed through a mobile phone. In building such architecture, various technologies need to be studied which are being used like Bluetooth, Zigbee, Wi-Fi to do a comparative study for knowing the best technology and which protocol will be good to implement such a system. In current work, nodeMCU(microcontroller) is used which is based on open source technology and uses Lua script for coding and assigns an ip address to the microcontroller which signals to the relays for turning on and off the device based on the user input. It uses HTTP protocol for sending the requests. The response is real time and can be applied with low installation costs. Bandwidth requirement is low for the microcontroller. Thus, it provides a wifi based low cost and reliable solution which can be readily accepted by users for its deployment and maintenance.