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
http://www.edgefxkits.com/
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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Block Diagram
Home automation under Wi-Fi through Android apps from any smart
phone
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Hardware Requirements Microcontroller
LCD display A to D converter Temperature sensors Relay Resistors Capacitors Diodes Transformer Voltage Regulator Transistors relays WiFi module as required
Home automation under Wi-Fi through Android apps from any smart
phone
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Software Requirements
Keil compiler
Language: Embedded C or Assembly.
Home automation under Wi-Fi through Android apps from any smart
phone
http://www.edgefxkits.com/
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.
Home automation under Wi-Fi through Android apps from any smart
phone
http://www.edgefxkits.com/
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.
Home automation under Wi-Fi through Android apps from any smart
phone
http://www.edgefxkits.com/
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
Home automation under Wi-Fi through Android apps from any smart
phone
http://www.edgefxkits.com/
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.
Home automation under Wi-Fi through Android apps from any smart
phone
http://www.edgefxkits.com/
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.
Home automation under Wi-Fi through Android apps from any smart
phone
http://www.edgefxkits.com/
A to D Converter
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.
Home automation under Wi-Fi through Android apps from any smart
phone
Analog Signal
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A to D Converter
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
Home automation under Wi-Fi through Android apps from any smart
phone
Digital Signal
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A to D Converter
Home automation under Wi-Fi through Android apps from any smart
phone
Converts analog signals into binary words
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A to D Converter
Home automation under Wi-Fi through Android apps from any smart
phone
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…)
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
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A to D Converter
Home automation under Wi-Fi through Android apps from any smart
phone
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.
Output States
Output Binary Equivalent
0 000
1 001
2 010
3 011
4 100
5 101
6 110
7 111
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Relay It is A electro magnetic switch
Used to control the electrical devices
Copper core magnetic flux plays main role here
Home automation under Wi-Fi through Android apps from any smart
phone
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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.
Home automation under Wi-Fi through Android apps from any smart
phone
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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.
Home automation under Wi-Fi through Android apps from any smart
phone
http://www.edgefxkits.com/
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.
Home automation under Wi-Fi through Android apps from any smart
phone
http://www.edgefxkits.com/
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.
Home automation under Wi-Fi through Android apps from any smart
phone
http://www.edgefxkits.com/
Applications
Home automation under Wi-Fi through Android apps from any smart
phone
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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Conclusion
Home automation under Wi-Fi through Android apps from any smart
phone
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).
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