This document describes a smart seminar hall automation system using IoT technology. The system allows remote control of seminar hall appliances like bulbs and fans using a mobile application. It uses a NodeMCU board connected to relays that control loads. Users can control appliances via the Blynk mobile app, which communicates with the NodeMCU board through a wireless network. The system was tested and able to successfully control appliances remotely. Future work may include integrating sensors to automatically control devices based on motion, light, and temperature conditions.

1. A DESIGN OF SMART SEMINAR HALL USING
IOT TECHNOLOGY
WELLFARE INSTITUTE OF SCIENCE TECHNOLOGY &
MANAGEMENT
(Approved by the AICTE, New Delhi and affiliated to Andhra University)Pinagadi (V),
Pendurthy (M), Visakhapatnam- 531173
1sT Author 2nd Author
CH.RAMANA BABU, M.Tech.,(PhD) P.Suvarna Raju , M.Tech.,(PhD)
Assistant Professor Assistant Professor
Department Of ECE, WISTM. Department Of ECE, WISTM.
3rd Author 4rd Author
R.Lavanya , M.Tech., G.Manikanta, M.Tech.,(PhD)
Assistant Professor Assistant Professor
Department Of ECE, WISTM. Department Of ECE, WISTM.

2. CONTENTS
 INTRODUCTION
 MOTIVATION
 PROJECT OBJECTIVE
 KEY IDEA
 BLOCK DIAGRAM , CODE OPERATION AND
CONNECTIVITY
 COMPONENTS REQUIRED AND WHY?
 NODEMCU
 RELAY MODULE
 PUSH BUTTONS
 WIRELESS NETWORK
 BLYNK WORKING
 RESULT
 CONCLUSION AND FUTURE WORK

3. INTRODUCTION
 MOTIVATION : To enhance the standard of living, the appliances need to
be wholly automated without any user intervention in any form whatsoever.
This enables the end user hassle-free interaction with the appliances as the
appliances learn and react as per the user's requirements without him
physically pressing a button.
 PROJECT OBJECTIVE : The main objective of this project is to
develop a Seminar hall automation system using an Node MCU board with
Internet being remotely controlled by any Android OS smart phone for getting
smarter.
 KEY IDEA : In this automation system, we will control Seminar hall
appliances as bulbs and Fans connected to relay using blynk application.

4. BLOCK DIAGRAM
NODE
MCU
(ESP8266)
RELAY
MODULE
MOBILE
APPLICATION
BPOWER
SUPPLY
WIRELESS
NETWORK
LOAD
Figure No:-1 Block Diagram

5.  CODE OPERATION :
After the code is written, check for errors and then upload it on to
the Node-MCU board and verify the functioning of the designed
circuit by checking the output.
 CONNECTIVITY :
o The circuit is very simple, I have used the GPIO pins D1, D2, D5 &
D6 to control the 4 relays.
o And the GPIO pins SD3, D3, D7 & RX connected with push buttons
to control the 4 relays manually.
o we have used the INPUT_PULLUP function in Arduino IDE
instead of using the pull-up resistors.
o We have used a 5V mobile charger to supply the smart relay module.
o The D3 pin should not be connected with GND during the booting
process of Node-MCU.

6. NODEMCU :
NodeMCU is an open source platform based on ESP8266 which can connect
objects and let data transfer using the WIFI protocol.
NodeMCU is an open source platform based on ESP8266 which can connect
objects and let data transfer using the Wi-Fi protocol. In addition, by providing
some of the most important features of microcontrollers such as GPIO, PWM,
ADC, and etc, it can solve many of the project’s needs alone.
The general features of this board are as follows:
•Easy to use
•Programmability with Arduino IDE or IUA languages
•Available as an access point or station
•practicable in Event-driven API applications
•Having an internal antenna
•Containing 13 GPIO pins, 10 PWM channels, I2C, SPI, ADC, UART, and 1-
Wire
COMPONENTS REQUIRED AND WHY?

8. RELAY MODULE : A relay is an electrical device which is generally
used to control high voltages using very low voltage as an Input.
Figure No:-2 Relay

9. Practical Kit Diagram
Figure No:-3 Practical Diagram

10.  PUSH BUTTONS : A Push buttons is a simple switch
mechanism to control some aspect of a machine or a process.
 WIRELESS NETWORK : A wireless network is a computer
network that uses wireless data connections between network
nodes.
•A wireless network allows devices to stay connected to the network but
roam untethered to any wires.
• Access point amplify Wi-Fi signals, so a device can be far from
a router but still be connected to the network.
• When you connect to a Wi-Fi hotspot at a cafe, a hotel, an airport
lounge, or another public place, you're connecting to that business's
wireless network.

11. BYLNK WORKS:
•Blynk was designed for the Internet of Things. It can control hardware remotely, it can
display sensor data, it can store data, vizualize it and do many other cool things.
•There are three major components in the platform:
•Blynk App - allows to you create amazing interfaces for your projects using various
widgets we provide.
•Blynk Server - responsible for all the communications between the smart phone and
hardware. You can use our Blynk Cloud or run your private Blynk server locally. It’s open-
source, could easily handle thousands of devices and can even be launched on a Raspberry
Pi.
•Blynk Libraries - for all the popular hardware platforms - enable communication with
the server and process all the incoming and out coming commands.
•Now imagine: every time you press a Button in the Blynk app, the message travels
to space the Blynk Cloud, where it magically finds its way to your hardware. It works the
same in the opposite direction and everything happens in a blynk of an eye.

14. FEATURES:
•Set of easy-to-use Widgets
•Direct pin manipulation with no code writing
•Easy to integrate and add new functionality using virtual pins
•History data monitoring via SuperChart widget
•Device-to-Device communication using Bridge Widget
•Sending emails, tweets, push notifications, etc.
Figure No:-4 Blynk App Flow Diagram

15. FINAL RESULT
 PRACTICAL
Figure No:-5 Final Result

16. CONCLUSION AND FUTURE WORK
CONCLUSION:
Based on the results of analysis of all data obtained by testing the
smart conference hall with the Internet of Things based NodeMCU
ESP6288 module, the following conclusions can be drawn. Smart
conference hall with Internet of Things (IoT) based NodeMCU ESP8266
Module can be designed with various components hardware and software
support .
FUTURE WORK:
Future scope for the automation system involves making conference
hall even smarter. Conference hall can be interfaced with the sensors
including the motion sensors, light sensors and temperature sensors and
thus this may provide the automatic toggling of the devices according to the
conditions..