Control of Lights + Fan using Wi-fi and Bluetooth SOFTWARE CODE LINK AND BLOCK DIAGRAM +CIRCUIT DIAGRAM. http://svsembedded.com/Control_of_Lights_Fan_using_Wifi_and_Bluetooth.php

1. Control of Lights + Fan using Wi-fi
and Bluetooth
SOFTWARE CODE LINK AND BLOCK DIAGRAM +CIRCUIT DIAGRAM.
http://svsembedded.com/Control_of_Lights_Fan_using_Wifi_and_Bluetoot
h.php
ABSTRACT
AIM:
Google android operating system is one of the leading and most popularly
preferred systems in smart phone. Smart phone affordability increases day by day
due to their size and portability .android GUI installed in smart phone. The
operator has to touch on the screen of the phone to control the home appliances.
This project is an android application which possesses the capability to control any
sort of electrical appliances providing remote access from smart phone using
Bluetooth. Bluetooth technology is wireless radio transmissions in a short distance
providing a necessary technology to create convenience, intelligence and
controllability. This generates personal area network in home environment, where
all these appliances can be interconnected and monitored using a single controller.
Home automation involves a degree of computerized or automatic control to
certain electrical and electronic systems in a building. Busy families, individuals
with physical limitation represent very attractive market for such networking. This
system will also assist and provide support in order to fulfill the needs of elderly
and disabled in home.

2. The project aims at designing an advanced home automation system using Wi-Fi
technology. The devices can be switched ON/OFF using a SMART PHONE
through Wi-Fi.Today is a world of advanced ubiquitous mobile applications which
are used exhaustively to save time and energy. These applications ease day-to-day
life of a common man. Based on these technologies and applications we designed a
Home Automation System. In this paper, we propose design and prototype
implementation of home automation system that uses Wi-Fi technology and
Android operating system. An attractive market for Home Automation System is
for busy families and individuals with physical limitations. Users can control
electrical appliances in home or office via smart phone.
Power Supply:
POWER SUPPLY:
STEP
DOWN
TRANSFOR
MER
BRIDGE
RECTIFIER
FILTER
CIRCUIT
REGULA
TOR
SECTION

3. BLOCK DIAGRAM:
Description:
This home automation system consists of two main hardware components: the cell phone
and the arduino, BT board. The cell phone hosts the Python script which enables the user to
access the home appliances and also the control commands for the appliances. This Python script
communicates with the Arduino BT board and sets up an ad-hoc communication protocol
between the two devices, which allows controlling the behavior of the arduino , BT board.
WIFI
MODULE
ESP8266
ARDUINO
UNO
R3
BLUETOOTH
MODULE
HC-05
RELAY
driver
LCD
16X2 DISPALY
BULB
1
RELAY
driver
BULB2
RELAY
driver
BULB3
RELAY
driver
DC
FAN

4. The Bluetooth antenna in our module picks up the packets sent from the cell phone.
Subsequently, these packets containing the appliance status commands are pipelined through
ATmega328 microcontroller and the designed analogue circuitry according to the definition of
each output. Different home appliances are connected to the digital output ports of the arduino
BT board via relays to provide sufficiently high currents and voltage compatibility. For test
purposes, 25W, 240V lamps have been used. Figure 2 shows the relay configuration for each
device and Figure 3 depicts the arduino BT board‟s communication with the home appliances.
Sending commands from software to turn ON/OFF a device may not guarantee the successful
operation of the device as the device may be defective. To solve this problem, a feedback circuit
has been designed and implemented to indicate the device‟s actual status after it receives the
command (ON/OFF) from the cell phone. Once the command has been sent to turn ON a device,
the feedback circuit senses the current and gives an output signal by turning ON a respective led
on the switching circuitry indicating that the device is ON. Otherwise, the device is
malfunctioning indicating that the command was not executed successfully.
Automation is the most frequently spelled term in the field of electronics. The hunger for
automation brought many revolutions in the existing technologies. These had greater importance
than any other technologies due to its user-friendly nature. These can be used as a replacement of
the existing switches in home which produces sparks and also results in fire accidents in few
situations. Considering the advantages of Wi-Fi an advanced automation system was developed
to control the appliances in the house. Wi-Fi (Short for Wireless Fidelity) is a wireless
technology that uses radio frequency to transmit data through the air. Wi-Fi has initial speeds of
1mbps to 2mbps. Wi-Fi transmits data in the frequency band of 2.4 GHz. It implements the
concept of frequency division multiplexing technology. Range of Wi-Fi technology is 40-300
feet.
The controlling device for the automation in the project is a Microcontroller. The data sent from
smart phone over Wi-Fi will be received by Wi-Fi module connected to Microcontroller.
Microcontroller reads the data and decides the switching action of electrical devices connected to
it through Relays and switches. The Microcontroller is programmed used embedded ‘C’
language.

5. SOFTWARE:
EMBEDDED ‘C’
EMBEDDED ONLINE COMPILER CODE
HARDWARE:
Arduino
POWER SUPPLY
MAX232
BLUETOOTH
RELAY
CONTROL UNIT
LCD
WIFI MODULE
ADVANTAGES:
LOW COST, AUTOMATED OPERATION, LOW POWER CONSUMPTION.