HOW GOOGLE HOME AUTOMATION WORKS! Internet of Things

      INTRODUCTION

       A home automation system is a system that automates the bulk of electronic and electrical tasks within a home. It uses a combination of hardware and software to enable control and management over appliances and devices within a home.Home automation not only refers to reduce human efforts but also energy efficiency and time saving. Here we are performing home automation by using ESP8266   and voice enabled application(Google assistant) in our project.

        

      The home automation circuit is built around ESP8266, Google Assistant, and a 4-channel relay board.The hardware set up should be according to the circuit diagram given below. 

      

      AC mains appliances(Bulbs) will be connected to relays which are controlled by the ESP8266.Whenever the user says the appropriate instruction (proper trigger words to  Google Assistant ), then that information will be send to ESP8266 via WiFi.The ESP8266 analyses the received commands and turns ON/OFF of the respective device via 4 – channel Relay board.

    COMPONENTS

    NodeMCU:

        NodeMCU(Node Microcontroller Unit) is open source platform, their hardware design is open for edit/modify/build.NodeMCU  Kit/board consist of ESP8266 WiFi enabled chip.The ESP8266 enables interaction  and provides a communication platform between our handset and the appliances need to be automated.

      Relay Board:

      This is a 5V 4-channel relay interface board, and each channel needs a 15-20mA driver current. It can be used to control various appliances and equipment with large current. It has a standard interface that   can be   controlled directly by microcontroller.Desired loads are connected to separate channels on the relay board.

      IFTTT:

      IFTTT is a free web-based service to create chains of simple conditional statements, called applets.An applet is triggered by changes that occur within other web services such as Gmail,Facebook,Telegram,Instagram or Pinterest.Proper trigger words are loaded and the corresponding action programmed with webhooks via IFTTT.

     WORKING

      NodeMCU is interfaced with our handset through IFTTT.Connections are given as per the circuit diagram.Loads are connected to the relay board.IFTTT is also synchronized with the NodeMCU.A proper set of instruction is dumped to the NodeMCU.The load is turned ON or OFF through Google Assistant.Proper instructions are dumped to the NodeMCU and when the proper triggered words are pronounced,the load is turned ON/OFF.

    CONCLUSION

     As the technologies are rapidly advancing that affects the human daily lives more flexible in controlling home Appliances.Electrical installations are heart of any residential building,therefore intelligent control ensures the safety and efficient control and eventually saves power consumption. As the technologies are rapidly advancing that affects the human daily lives more flexible in controlling home appliances.