This document introduces an IoT-based smart home system developed by a group of students. The system uses a Raspberry Pi as the central controller connected to various sensors and appliances via relays. It allows remote monitoring and control of lights, fans and security through a web interface or mobile app. The system architecture consists of physical devices, communication protocols, and an application layer for user control. The document discusses the components, circuit diagrams and provides an overview of the proposed smart home system and its applications.

1. WELCOME

2. BY
LAVANYA K S (21)
NIVEDITHA SUDARSANAN (28)
PARVATHY S M (29)
ROMINI YESUDAS (35)
Project Assisted By Project Guided By
DHANYA M AJITH .A
Asst. Prof in ECE Asst. Prof in ECE
SEENA R
Asst. Prof in ECE

3. INTRODUCTION
• Today, technology has become an integrated part of people’s
lives. It has, and continues to influence many aspects of daily
life and has allowed better social interaction, ease of
transportation etc.
• Home automation or sensible home may be delineated as
introduction of technology within the home atmosphere to
provide ease and protection to its occupants.
• By using the technology of the Internet of Things, the
examination and execution of home automation have got
additional average.

4. WHY SMART HOME?
• Smart Home is Applicable in various aspect of our home and
environment to suite our different preferences
• Comfort or Ease of Control
• Entertainment
• Security
• Convenience all time
• Life time personalization
• User friendly

5. LITERATURE SURVEY
• The work of John J. Greichen discussed
challenges faced by home automation systems
include high manufacturing costs, high
development costs
• Kelly, Sean Dieter Tebje, Nagender Kumar
Suryadevara, and Subhas Chandra
Mukhopadhyay. "Towards the implementation
of IoT for environmental condition monitoring
in homes."

6. PROPOSED IoT ARCHITECTURE

7. • The physical layer consists of the devices which are to be controlled.
• The data link layer consist of IoT gateway router, device manager and
various communication protocols.
• The raspberry pi is used as the IoT gateway which communicates to
personal computer or smart phone by means internet in the network and
transport layer.
• The application and presentation layer consist of web portal which is
nothing but designing a web page by which we can control the various
appliances .
• The appliances can also be controlled by creating an app in mobile phone
which is similar to web portal.

8. BLOCK DIAGRAM

9. • From the raspberry pi, by means of wifi configuration and IoT
concept we can turn ON/OFF the light by using the relay.
• Relays are switches that open and close circuits
electromechanically or electronically.,
• The PIR sensor is used to detect the human being presence
and sent messages in any case of there is a theft
• The lights and fans can be controlled by creating web server in
personal computer, tablet or we can create an app in mobile.

10. CIRCUIT DIAGRAM

11. • The Internet of things (IoTs) can be defined as connecting the
various types of objects like smart phones, personal computer and
Tablets to internet.
• The aim of the IoT is that enable things to be connected any
time, any where with any thing and anyone
• IoT brings in very new fangled type of communication between
things and people and also between things.
• With the introduction of IoTs, the research and development of
home automation are becoming popular in the recent days.

12. • IoTs technology is used to come in with innovative idea and
great growth for smart homes to improve the living standards
of life.
• The IoT-based architecture provides high-level flexibility at
the communication and information.
• It is an approach which is relevant in many different
environments such as patient monitoring system, security,
traffic signal control or controlling various applications.

13. Raspberry pi
• The Raspberry Pi is a low cost credit card size single board computer
developed by raspberry pi foundation.
 Raspberry pi is controlled by a modified version of Debian Linux .
The core of the home automation system is this minicomputer.
 Several generations of Raspberry Pis have been released.
 Here we are using model raspberry pi 3.

14. Features
• 1GB RAM
• 4 USB ports
• Consist of 40 pins
• Full HDMI port
• Ethernet port
• Camera interface (CSI)
• Display interface (DSI)
• Micro SD card slot

15. Pin Diagram

17. Raspbian
• Raspbian is the computer operating
system used for Raspberry Pi.
• It is a debian based computer operating system
• It is also called Noobs OS.
• This OS can be downloaded from the website
‘raspberrypi.org’

18. PYTHON
• Python is a widely used high-level programming language for
general purpose programming.
• It has wide range of applications from Web development ,
scientific and mathematical computing to desktop graphical
user Interfaces.
• Python allows you to write programs having greater
functionality with fewer lines of code.

19. LM35
• Calibrated directly in centigrade
• Linear +10 mV/⁰Cscale factor
proportional to the Centigrade
• Ensured accuracy(at+25⁰C)
• Suitable for remote applications
• Less than 60µA Current drain
• Operates from 4to 30v
• Low self heating capability
• Low impedance output

20. PIN DIAGRAM

21. RELAYS
• A relay is an electrically operated switch
• control high-current AC loads from lower voltage DC control
circuitry.
• switched by a much lower voltage and at a much lower
current than most mechanical relays.

22. Features
• Trigger Current: 7.5mA/12V
• Control Voltage: 24-380V AC
• Input Voltage: 3-32V DC
• Zero Cross trigger method

23. MQ6
• High sensitivity to LPG, iso-butane, propane
• Small sensitivity to alcohol, smoke.
• Fast response .
• Stable and long life
• Simple drive circuit
• Resistance value of MQ-6 is difference to various kinds
and various concentration gases
• calibrate the detector for 1000ppm of LPG concentration in air
• Load resistance ( RL) about 20KΩ(10KΩ to 47KΩ).
• When accurately measuring, the proper alarm point for the gas detector
should be determined after considering the temperature and humidity
influence.

24. • The sensor requires two voltage inputs: heater voltage (VH) and circuit
voltage(VC).
• VH is used to supply standard working temperature to the sensor and it can adopt
DC or AC power,
• VRL is the voltage of load resistance RL which is in series with sensor.
• Vc supplies the detect voltage to load resistance RL and it should adopts DC power

25. PIR Sensor
• A device used to detect motion by receiving infrared radiation.
• They are small, inexpensive, low-power, easy to use
• PIRs are basically made of a pyroelectric sensor, which can detect
levels of infrared radiation
• Along with the pyroelectic sensor is a bunch of supporting circuitry,
resistors and capacitors
• . This chip takes the output of the sensor and does some minor
processing on it to emit a digital output pulse from the analog
sensor.

26. • Digital pulse high (3V) when triggered (motion detected) digital low when
idle (no motion detected).
• Pulse lengths are determined by resistors and capacitors on the PCB and
differ from sensor to sensor.
• Sensitivity range: up to 20 feet (6 meters) 110° x 70° detection range
• Power supply: 5V-12V input voltage for most modules

27. Wi-Fi
• A radio technology that networks the devices
• Refers to wireless LAN products based on the IEEE802.11g specification
• Provides easy connections to the internet and buisness networks while
travelling
• The main attractive feature of this technology is that it can provide
wireless broad band connection within a specific geographic boundary
• A Wi-Fi hot spot is created by installing an access point to an internet
connection
• An access point acts as abase station
• When Wi-Fi enabled device encounters a hotspots the device can then
connect to that network wirelessly
• A single access point can support up to 30 users and can function within a
range of 100-150 feet indoors and up to 300 feet out doors

28. MCP3008 ADC
• The MCP3008 is a 10bit 8-channel Analogue-to-digital
converter (ADC).
• It is cheap, easy to connect and doesn’t require any
additional components.
• It uses the SPI bus protocol which is supported by the Pi’s
GPIO header.

29. PIN DIAGRAM

30. WEB SERVER
• Various applications located at home can be
remotely controlled
• information are stored in embedded system
• Such type of web servers are called embedded
web server
• we will use the Raspberry Pi to induce the
information from servers
• Raspberry pi also can serve sound, video,
workable programs

31. USER INTERFACE
• the user will see and act with.
• the android enabled phone makes control
• provides a range of pre-build program parts
• provides other User interface modules
• enable the user to look at the device status

32. ADVANTAGES
• Flexibility
• Programmatically control devices
• Better scalability and security
• Energy saving
• Improved comfort and safe

33. DISADVANTAGE
• High cost
• Damage of cable affect entire system
• Signal receiving problem
• Human error occur
• Huge system crash

34. FUTURE SCOPE
• Controlling various household devices of
house with internet
• Industrial automation and management
through internet
• machine-driven fireplace exit systems
• improvement of security problems in
extremely restricted areas.

35. CONCLUSION
• we have introduced the event of a home
management
• security system exploitation using Raspberry
pi and IoT
• The system is suitable for remotely controlling
the home appliances .
• The system may be employed in many places
like banks, hospitals etc

36. Thank you