International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 07 Issue: 08 | Aug 2020 www.irjet.net p-ISSN: 2395-0072 © 2020, IRJET | Impact Factor value: 7.529 | ISO 9001:2008 Certified Journal | Page 2647 Design and Implementation of IoT based Smart Controlling Application for LED Scrolling Text Display with Integration of Google Assistant Ms. Ekta 1 , Dr. Vivek Kumar 2 , Mr. Sandeep 3 1 M.Tech. Scholar, Department of Electrical Engineering, B.R.C.M.C.E.T., Bahal, Haryana, India 2 Head of Department of Electrical Engineering, B.R.C.M.C.E.T., Bahal, Haryana, India 3 Assistant Professor, Department of Electrical Engineering, B.R.C.M.C.E.T., Bahal, Haryana, India ---------------------------------------------------------------------***---------------------------------------------------------------------- Abstract - Here in this work efforts were made to exploit the potentials of a Voice Personal Assistant (VPA) and to enable the user to control a device remotely and quickly with much more ease. Google Assistant is an AI (Artificial Intelligence) based voice command service. In this work, using voice, we interacted with Google Assistant. It can search on the internet, schedule events, set alarms, control appliances, etc. This service we used over the smartphone. We found Google Assistant useful in remote controlling of smart home devices including lights, switches, fans and thermostats. We also found that Google Assistant supports both text or voice entry and it follows the conversation whichever entry method be used. We here in this work built an application which can control the scrolling text message over an LED dot matrix display using this Google Assistant Platform over the phone. Key Words: AI, VPA, Google Assistant, LED dot matrix display, WiFi, IoT, Cloud, ESP8266, etc. 1. INTRODUCTION Human's communication with the machines is evolving day by day. This human-machine interaction process started with the buttons has evolved to the touch-pads and now humans can give command to the intelligent machines by just talking to them. One of the goals of Artificial intelligence (AI) is the realization of natural dialogue between humans and machines. In recent years, the voice systems, also known as interactive conversational systems are the fastest growing area in AI. These are known as Voice Assistant or Virtual Personal Assistant (VPA) system and can be used in different areas of applications, including education assistance, medical assistance, robotics and vehicles, disabilities systems, home automation, and security access control. Nowadays, Google Assistant is becoming more and more popular personal assistant and people frequently use it's features in the applications on their, smart' devices such as smartphones, smart digital television receivers, smartwatches, etc. 2. AIM & OBJECTIVE The aim of the project was to control a scrolling text message LED matrix display using Artificial Intelligence based Virtual Personal Assistants (VPAs) by Google i.e. “Google Assistant”. The developed IoT system was NodeMCU centric and communication medium between the user mobile handset and the device to control was wireless only using the Wi-Fi protocol. The objective was to empower the user to assign some voice command over the mobile handset with VPA facility to control a smart device. The VPA should respond to the user by converting this voice command-to-text and revert back to the user by replying in voice and text both and also concurrently by performing the assigned task or transferring the commands to the device. A local hotspot was to be used to establish connectivity. Hardware prototype has validated the work. 3. SYSTEM WORKING PRINCIPLE This project uses two services to make it control through Google Assistant from anywhere in the world, Adafruit MQTT and IFTTT. Adafruit MQTT broker allows changing the message from any internet connected device globally. Here the NodeMCU was acting as a MQTT client hence it was constantly listening to Adafruit MQTT broker. So if any changes occur in the server side, the same changes will be observed on the client side i.e. on our NodeMCU board. And to change our message on the MQTT broker side via Google assistant, we were using one service called IFTTT. In IFTTT, we were making an applet in which we could connect two services, Google Assistant and Adafruit MQTT. So by making proper applet, we could successfully update the message on the adafruit broker side with Google Assistant on the phone. 4. SYSTEM ARCHITECTURE Nowadays, there is technology that can retrieve contextual data from the user's environment and interact with the user in some simple, yet effective manners. The intelligent voice personal assistants can interact with the person by means of natural voice language. Here in this system a LED matrix display was controlled by the AI voice assistant system using Google Assistant. This system primarily focuses on the combination of switching circuit and the Google Assistant which is an artificial intelligence powered virtual assistant. The peerless system is distinctive from the other existing system which has been implemented