Article

International Journal of Innovative and Emerging Research in Engineering
Volume 2, Issue 4, 2015
Available online at www.ijiere.com
International Journal of Innovative and Emerging
Research in Engineering
e-ISSN: 2394 – 3343
p-ISSN: 2394 – 5494
GSM based electronic noticeboard via SMS
Anjali. Y. Pancholi, Vaibhavi.R.patel, Dhaval.B.Mistry and Hemali.K.Machhi.
Student of Electronics & Communication GEC/GTU Bharuch, Gujarat, India.
ABSTRACT:
The main aim of this electronic noticeboard is that we can display the notice in the form of message at the output
device LED display. This electronic noticeboard is used in many places like institutes, organization, parks, stations
and many public places where everyday writing the notices is very tough and time consuming that’s why this
electronic notice board is most important now a days.In this project, the message to be displayed is sending
through a SMS.The GSM modem receives this SMS. The commands are serially transferred to the modem
through the MAX232 and the GSM modem transmits the stored messages through the COM port. The
microcontroller , which is from 8051 family validates this SMS and display the messages in LCD display
board.The GSM based notice board contain both hardware and software.In this model LCD display can be used
for simulation purpose.
Keywords: Hardware:-Micro controller, GSM modem , MAX 232 level converter, LED
Software:- keil, C language
I. INTRODUCTION
Electronics Notice board is an enhanced technology used in order to same time and covey message with no delay. It
provides a data transfer capability between the GSM modem and the ntice board without the need of wiring on through a
radio frequency link. This is a microcontroller based Embedded system which achieves wireless interference between PC
and a noticeboard. Here LCD is work as a notice board. The user type and send the message to display on LCD.At the
receiver side PIC microcontrollervbased embedded system receives the data through the RF receiver, demodulates it and
sends to the display side.
II. BLOCK DIAGRAM
Figure 1. Block diagram of electronic notice board
In this both transmiting and receiving side is present. At first from the transmitter side message is send by mobile
phone by user in the form of SMS. This message is receive by the GSM modem and then after microcontroller will valid
this message and pass it to display on LCD screen. In the microcontrooler the program is load by PCs[3].
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International Journal of Innovative and Emerging Research in Engineering
Volume 2, Issue 4, 2015
III. HARDWARE DISCRIPTION
1) GSM modem:It is very compact in size and easy to use as plug in module. The modem is coming with 5TTL interface, which allows
you to connect directly to 5V microcontroller.It is suitable for SMS as well as DATA transfer apllicationin m2m
interface.Using this modem you can send SMS through simple AT command.
Figure 2. GSM modem
2) The microcontroller:It is the heart of this whole system. It is used for interfacing the display, memory and other component with GSM
modem. It is compatible with 8051 family set.This microcontroller is contain the program from the kail compiler from PC
and work on the command which given to it.[1]
3) Display unit(LCD):One of the most common device attached to an 8051 is an LCD display. This display device outputs the message which
is send by transmitter side. This LCD display contain two internal byte wise register. One for command and another one
for display.[1]
Figure 3. LCD display
4) MAX232 :The MAX 232 is a dual driver that includes a capacitive voltage level from a single 5-V supply. The microcontroller
is interfaced with PC via MAX232 level convertor. It is used to convert RS232 voltage to TTL voltage level and vice versa.
[1]
IV. SOFTWARE DESCRIPTION
1) Embedded C:It is language for programming microcontroller for embedded applications
2) Keil compiler:keil is compiler to compile embedded C programs. The Keil 8051 develpoment tools are designed to solve the complex
problem facing embedded software developers. It creates hex file from the compiled C program which can be burned into
IC.[1]
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International Journal of Innovative and Emerging Research in Engineering
Volume 2, Issue 4, 2015
V. CIRCUIT DIAGRAM OF TRANSMITTER
Figure 4. Circuit diagram of transmitter of electronic notice board
At the transmitter circuit, MAX 232 is used to interface PC to PIC MCU. Using RS232 connector cable, data is
transferred to the PIC MCU. The PIC MCU does the particular task by giving proper suitable commands. PIC MCU stores
the data and also display it on the LCD.Here continuously blinling LCD indicates that the transmitter module is working
properly.The stored data is encoded using FM modulation technique and the modulated signal is then transmitted using RF
transmitter with the help of suitable antenna.[5]
VI. CIRCUIT DIAGRAM OF RECEIVER
Figure 5. Circuit diagram of receiver of electronic notice board[5]
At the receiver circuit , the RF modulated signal is received. This weak signal is further amplified using opamp and
decoded the RF signal using FM demodulation techniques. The decoded data is stored in PIC MCU and display on LCD.
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VII. ADVANTAGES
Time saving: We can deliver the message instantly to any remote destination and as it is displayed in generalthe
time is saved.
Multiple message and notice board controlled from a single location.
It is easy to use.
Less complexity due to wireless transmission.
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International Journal of Innovative and Emerging Research in Engineering
Volume 2, Issue 4, 2015
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VIII. LIMITATION
Limited range of wireless transmission: It shows the garbage values when the distance between transmitter &
receiver is out of range.
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Uses in banks.
Uses in education.
Uses in information sector.
IX. APPLICATION
CONCLUSION
From this model we can displayed the messages in the form of SMS via mobiles and display the messages on the
LED with the help of GSM module and micro controller.
ACKNOWLEDGMENT
It is pleasure to express my heart felt grand to those who helped us and also contribute towards yhe preparation
of this seminar. I am indebted to our guide Prof S.V.Bhuriya, Prof. S.J.Dawda, whose guidance and timely suggestion
inspired to us to complete project in present form.I would like to thank to the entire tem of B.E. Staff whose suggestion
helped us creating this project. I would like to pay special thanks to our parents for the sparing time and inspiring us.
Although there remain some names but none are remain un-thanked.
REFERENCES
[1] http://www.slideshare.com/ electronic notice board
[2] http://www.SUNROM.com / GSM model introduction/ Microcontroller connection
[3] ”International Journal of engineering research and techology (IJERT) ISSN: 2278-0181,volume-2,issue11,nov2013.
[4] B.Bany, microprocessor Hardware interfacing, addition Wesley,
New York 2000,pp 212-228.
[5] http://www.google.com/ photos of components of electronics notice board
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