Home automation under Wi-Fi through Android apps from any smart phone

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Home automation under Wi-Fi through Android apps
from any smart phone
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Home automation under Wi-Fi through Android apps
from any smart phone
Introduction

• The main aim of the project is to control
  multiple electrical loads remotely over internet
  falling under the basic principles of Internet of
  Things-IOT. For this real-time scenario we use an
  Android app on any smart cell phone with user
  configurable front end (GUI). The data sent from
  the cell phone upon touch commands are sent
  through allotted IP fed to it, to any nearby
  wireless modem which is then received by a Wi-Fi
  module interfaced to a microcontroller of 8051
  series, under TCP IP via networked wireless modem
  environment.

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Home automation under Wi-Fi through Android apps
from any smart phone
Block Diagram
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Home automation under Wi-Fi through Android apps
from any smart phone
Hardware Requirements

• Microcontroller
• LCD display
• A to D converter
• Temperature sensors
• Relay
• Resistors
• Capacitors
• Diodes
• Transformer
• Voltage Regulator
• Transistors
• relays
• WiFi module as required

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Home automation under Wi-Fi through Android apps
from any smart phone
Software Requirements

• Keil compiler
• Language Embedded C or Assembly.

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Home automation under Wi-Fi through Android apps
from any smart phone
Wi-Fi through android apps

• The Wi-Fi works on radio waves technology.
• The data to be passed through Wi-Fi is converted
  into the electromagnetic signal which is then
  sent using the antenna.
• This signal is received and decoded by the outer
  at the receiving end.
• This signal is passed to the controller which is
  nothing but AVR controller.

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Home automation under Wi-Fi through Android apps
from any smart phone
Home automation

• Home automation is the residential extension of
  building automation and involves the control and
  automation of lighting, heating, ventilation, air
  conditioning (HVAC), appliances, and security.
• Modern systems generally consist of switches and
  sensors connected to a central hub sometimes
  called a "gateway"
• From which the system is controlled with a user
  interface that is interacted either with a
  wall-mounted terminal, mobile phone software,
  tablet computer or a web interface.

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Home automation under Wi-Fi through Android apps
from any smart phone
Micro Controller

• Compatible with MCS-51 products
• 8K bytes of in-system programmable (ISP)
• flash memory
• 4.0V to 5.5V operating range
• Crystal frequency 11.0592mhz
• Three-level program memory lock
• 256 x 8-bit internal RAM
• 32 programmable I/O lines

AT89S52
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Home automation under Wi-Fi through Android apps
from any smart phone
Home automation

• Home automation is the residential extension of
  building automation.
• And involves the control and automation of
  lighting, heating, ventilation, air conditioning
  (HVAC), appliances, and security.
• Modern systems generally consist of switches and
  sensors connected to a central hub sometimes
  called a "gateway"
• From which the system is controlled with a user
  interface that is interacted either with a
  wall-mounted terminal, mobile phone software,
  tablet computer or a web interface.

http//www.edgefxkits.com/
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Home automation under Wi-Fi through Android apps
from any smart phone
Liquid Crystal Display (LCD)

• Most common LCDs connected to the
  microcontrollers are 16x2 and 20x2 displays.
• This means 16 characters per line by 2 lines and
  20 characters per line by 2 lines, respectively.
  
• The standard is referred to as HD44780U
• It refers to the controller chip which receives
  data from an external source (and communicates
  directly with the LCD.

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Home automation under Wi-Fi through Android apps
from any smart phone
A to D Converter
Analog Signal

• Analog signals directly measurable quantities
  in terms of some other quantity
• Examples
• Thermometer mercury height rises as temperature
  rises
• Car Speedometer Needle moves farther right as
  you accelerate
• Stereo Volume increases as you turn the knob.

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Home automation under Wi-Fi through Android apps
from any smart phone
A to D Converter
Digital Signal

• Digital Signals have only two states. For
  digital computers, we refer to binary states, 0
  and 1. 1 can be on, 0 can be off.
• Examples
• Light switch can be either on or off
• Door to a room is either open or closed

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Home automation under Wi-Fi through Android apps
from any smart phone
A to D Converter

• Converts analog signals into binary words

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Home automation under Wi-Fi through Android apps
from any smart phone
A to D Converter
Output States Discrete Voltage Ranges (V)
0 0.00-1.25
1 1.25-2.50
2 2.50-3.75
3 3.75-5.00
4 5.00-6.25
5 6.25-7.50
6 7.50-8.75
7 8.75-10.0

• Quantizing - breaking down analog value is a set
  of finite states
• Example
• You have 0-10V signals. Separate them into a set
  of discrete states with 1.25V increments. (How
  did we get 1.25V? See next slide)

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Home automation under Wi-Fi through Android apps
from any smart phone
A to D Converter
Output States Output Binary Equivalent
0 000
1 001
2 010
3 011
4 100
5 101
6 110
7 111

• Encoding - assigning a digital word or number to
  each state and matching it to the input signal
• Example
• Here we assign the digital value (binary number)
  to each state for the computer to read.

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Home automation under Wi-Fi through Android apps
from any smart phone
Relay

• It is A electro magnetic switch
• Used to control the electrical devices
• Copper core magnetic flux plays main role here

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Home automation under Wi-Fi through Android apps
from any smart phone
Relay Driver ULN2003

• ULN is relay driver application
• The ULN2003 is A monolithic high voltage and high
  current darlington transistor arrays.
• It consists of seven NPN darlington pairs that
  features high-voltage outputs with common-cathode
  clamp diode for switching inductive loads.
• The collector-current rating of a single
  darlington pair is 500ma.
• The darlington pairs may be paralleled for higher
  current capability.

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Home automation under Wi-Fi through Android apps
from any smart phone
Relay Driver ULN2003

• The ULN functions as an inverter.
• If the logic at input 1b is high then the output
  at its corresponding pin 1c will be low.

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Home automation under Wi-Fi through Android apps
from any smart phone
Working Principle

• The data sent from the cell phone upon touch
  commands are sent through allotted IP fed to it,
  to any nearby wireless modem.
• Which is then received by a Wi-Fi module
  interfaced to a microcontroller of 8051 series,
  under TCP IP via networked wireless modem
  environment.
• Relays are then driven as per the command
  received at the controller end to handle
  electrical loads.

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Home automation under Wi-Fi through Android apps
from any smart phone
Working Principle

• The real time data is also seen at the sending
  end upon a LCD display interfaced to the
  microcontroller that displays the status of the
  loads too.
• The power supply consists of a step down
  transformer 230/12V, which steps down the voltage
  to 12V AC.
• This is converted to DC using a Bridge rectifier
  and
• It is then regulated to 5V using a voltage
  regulator 7805
• Which is required for the operation of the
  microcontroller , 3.3 volt for the Wi-Fi unit and
  other components.

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Home automation under Wi-Fi through Android apps
from any smart phone
Applications

• Home automation This project can be used to
  control various Home Appliances
• We can control device from a long distance, thus
  it gives ease of access.
• Faster operation and efficient.
• No need to carry separate remote or any other
  controlling unit.

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Home automation under Wi-Fi through Android apps
from any smart phone
Conclusion

• Home automation under Wi-Fi through Android apps
  from any smart phone was designed and implemented
  to control multiple electrical loads
  remotely over internet falling under the basic
  principles of Internet of Things-IOT. For this
  real-time scenario we use an Android app on any
  smart cell phone with user configurable front end
  (GUI).

http//www.edgefxkits.com/
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