BLUETOOTH DEVICE CONTROL THROUGH ANDROID APPLICATION
BLUETOOTH DEVICE CONTROL THROUGH
DR B R AMBEDKAR NATIONAL INSTITUTE OF TECHNOLOGY JALANDHAR,
DEPARTMENT OF ELECTRONICS AND COMMUNICATION ENGINEERING.
PROJECT GUIDE Submitted by:
Dr. R K Sunkaria G. Praveen
Now a days everyone is using smartphone and even children
find ease in operating it. Smartphones are used a minimum of
seven times a day, then why can’t we use a smart phone to
control our daily objects. Our smartphone consists of so
wireless communication modules like Bluetooth,Wifi and
some sensors like proximity sensor,accelerometer sensor,IR
etc….To use any hardware of the smartphone we have to use
an application which runs on that operating system. So,in this
project I am using an android application to control home
appliances through Bluetooth.
Effective use of wireless communication in operating
To bridge the gap between smart phones and electrical
Bluetooth works up to a range of 15 meters, so user
can use anywhere at home.
Create a reliable modern switches.
The AT89S52 is a low-power, high performance CMOS 8bit microcontroller
with 8k bytes of in-system programmable flash memory. The device is
manufactured using Atmel’s high-density nonvolatile memory technology
and is compatible with the industry-standard 80C51 instruction set and pin
out. The Atmel AT89S52 is a powerful microcontroller which provides a
highlyflexible and cost-effective solution to many embedded control
The AT89S52 Provides the following standard features: 8K bytes of flash,
256 bytes of RAM, 32 I/O lines, Watchdog timer, two data pointers, three
16-bit timer/counters, a six-vector two-level interrupt architecture, a full
duplex serial port, on-chip oscillator, and clock circuitry. The AT89S52 is
designed with static logic for operation down to zero frequency and
supports two software selectable power saving modes. The powerdown
mode saves the RAM contents but freezes the oscillator, disabling all other
chip function until the next interrupt or hardware reset.
Bluetooth is a wireless technology standard for exchanging data over short
distances (using short-wavelength UHF radio waves in the ISM band from
2.4 to 2.485 GHz) from fixed and mobile devices, and building personal
area networks (PANs). Invented by telecom vendor Ericsson in 1994, it
was originally conceived as a wireless alternative to RS-232 data cables. It
can connect several devices, overcoming problems of synchronization.
Hc-05 can be connected as server-client model, data transmission is based
on master-slave technique.Master-Slave can exchange their roles after
connection is made.In this project hc-05 is in server mode and smartphone
is connected as client.
ADVANTAGES & APPLICATIONS
Wireless communication with PC input and output
devices, the most common being the mouse,
keyboard and printer.
More useful for old people and handicapped persons.
Using this project for controlling devices is completely
For low bandwidth applications where higher USB
bandwidth is not required and cable-free connection
Establishing small range personal networks.
Embedded system designed should be ON everytime which
leads to power consumption.
Bluetooth is restricted to only 15 mts,for long distance
communications it is not desirable.In such cases wifi is
Quite Expensive, the Embedded system designed it costs upto
Smartphone is necessary,without a smartphone user cannot
operate the devices.
By accomplishing this project, we now appreciate the
Through this project, we have now seen an exact application
of theory such as serial communication, server-client data
transmission,developing android application and a/c