WIRELESS NOTICE BOARD BASED ONARDUINO AND GSM

TECHNOLOGY

Submitted in partial fulfillment of the requirements for the

award of Bachelor of Engineering degree in

Electronics and Communication Engineering

FATIN KISHO E (39130128)

RAJA MANIKANDAN P(39130365)

DEPARTMENT OF ELECTRONICS AND COMMUNICATION

ENGINEERINGSCHOOL OF ELECTRICAL AND ELECTRONICS

ENGINEERING

SATHYABAMA

INSTITUTE OF SCIENCE AND TECHNOLOGY

(DEEMED TO BE UNIVERSITY)

Accredited with Grade “A” by NAAC

JEPPIAAR NAGAR, RAJIV GANDHI SALAI, CHENNAI - 600

APRIL 2023

DEPARTMENT OF ELECTRONICS AND COMMUNICATION

ENGINEERING

BONAFIDE CERTIFICATE

This is to certify that this Project Report is the bonafide work of Fatin Kisho E

(39130128) and Raja Manikandan P (39130365) who carried out the project entitled

“WIRELESS NOTICE BOARD BASED ON ARDUINO AND GSM

TECHNOLOGY “under the supervision of Dr.S.Barani.M.E., Ph.D.

Internal Guide

Dr.S. Barani M.E., Ph.D.

Dr.T. Ravi M.E., Ph.D.

Head of the Department

Submitted for Viva voce Examination held on 27.04.23

Internal Examiner External Examiner

iii

DECLARATION

This is to certify that this Project Report is the bonafide work of Fatin

Kisho E (39130128) and Raja Manikandan P(39130365) , hereby declare that

the Project Report entitled “WIRELESS NOTICE BOARD BASED ON

ARDUINO AND GSM TECHNOLOGY” is done under the guidance of Dr.S.

BARANI is submitted in partial fulfilment of the requirements for the award of

Bachelor of Engineering degree in Electronics and Communication

Engineering.

DATE: 27.04.23

PLACE: CHENNAI

SIGNATURE OF THE CANDIDATES

ACKNOWLEDGEMENT

We are pleased to acknowledge my sincere thanks to Board of Management of

SATHYABAMA INSTITUTE OF SCIENCE AND TECHNOLOGY for their kind

encouragement in doing this project and for completing it successfully. I am grateful to them.

We convey my profound gratitude to Dr. N.M. NANDHITHA, M.E., Ph.D., Prof. & Dean,

School of Electrical and Electronics and Dr. T. RAVI, M.E., Ph.D., Head of the Department of

Electronics and Communication Engineering, Sathyabama University for having been a

constant source of support and encouragement for the completion of the project.

We consider my self-most fortunate and immensely privileged to have worked under the

guidance of Dr. S BARANI M.E., Ph.D. Department of Electronics and Communication

Engineering to complete this project successfully.

We express heartfelt thanks to all teaching and non-teaching staff members of the

department of Electronics and Communication Engineering who are helpful in many ways

for the completion of the project.

ABSTRACT

The project deals with an interesting and innovative manner of displaying messages

on an electronic display board using wireless technology. Notice boards are one of the

basic things in any organisation or public utility places likes hospitals, airports, bus stations,

railway stations, shopping malls and parks. It is time consuming and tedious process to

manually write down the different notices every now and then. To overcome the problem,

the idea of wireless digital display board has been proposed in this paper. The key

objective of this project is to develop a notice board that receives and displays messages

from an authentic user from anywhere in the world using GSM technology. The SIM card

loaded in the GSM module fitted with the wireless display board receives messages from

authorised user having a mobile phone. The received message is then displayed on the

wireless notice board making the whole process easy and fast. Thus the authentic users

can send messages from any corner of the world to be displayed on the notice board using

GSM technology.

CONTENTS

CHAPTER

TITLE

PAGE

NO.

ABSTRACT

LIST OF FIGURES

vii

INTRODUCTION

1.1 OBJECTIVE

1.2 PROBLEM STATEMENT

LITERATURE SURVEY

2.1 LITERATURE REVIEW

SYSTEM ANALYSIS

3.1 EXISTING SYSTEM

3.2 PROPOSED SYSTEM

REQUIREMENTS SPECIFICATION

4.1 FEATURES

4.2 HARDWARE COMPONENTS

4.3 SOFTWARE COMPONENTS

DESCRIPTION OF PROPOSED SYSTEM

5.1 GSM MODULE

5.1.1 GSM ARCHITECTURE

5.1.2 GSM WORKING PRINCIPLE

5.2 ARDUINO UNO R3

5.2.1 ARDUINO ARCHITECTURE

5.3 LED

5.4 POWER SUPPLY

5.5 EMBEDDED C

IMPLEMENTATION OF SYSTEM

6.1 APPLICTIONS

6.2 ADVANTAGES

CONCERNS AND STANDARDS

7.1 CONCERNCS

7.2 STANDARDS

RESULTS

CONCLUSION AND FUTURE WORKS

REFERENCES

APPENDIX

A. SOURCE CODE

vii

LIST OF FIGURES

FIGURE

NO.

TITLE

PAGE.

NO.

3.1

Block diagram of existed system

3.2

Block diagram of proposed system

4.1

Working of proposed System

5.1

Gsm module

5.2

Gsm module Architecture

5.3

Arduino uno

5.4

Arduino uno Architecture

5.5

LED

5.6

Power supply unit

5.7

Arduino uno interconnecting with gsm

8.1

Final module output

CHAPTER 1

INTRODUCTION

GSM (Global System for Mobile Communications) – an open, digital cellular

technology, first deployed in Finland in December 1991 is the most widely used wireless

digital communication technology. As of 2017, it has become the global standard for mobile

communications – with over 90% market share, operating in over 219 countries and

territories. Digital advertisements have become popular nowadays as shopping malls, super

markets, airports use digital display boards. From every small institution to big organisation,

messages are displayed on digital boards. Over the last two decades the use of cell phones

has been rapidly increasing. Mobile phones and the related technologies have become one

of the most important things in this modern era. This drastic use of mobile phones gave the

interesting idea of sending and receiving messages and the displaying themon digital board.

The SMS (Short Message Service) facility in mobile handset enables us to send and receive

messages all around the world by virtue of International roaming feature. The main aim of

this project is to replace the conventional notice boards by wireless digital displays driven by

GSM technology. The authenticated user on the sending end sends SMS (notice to be

displayed on the board) using his mobile handset to the SIM card loaded in the GSM module

(attached to the wireless notice board), which receives the message and passes it to the

microcontroller in the arduino nano for storage and then displays the received SMS on the

wireless digital board. The SIM card at the receiving end in the GSM module receives only

those messages whose initial character is * and finalis ‘#’. The device can be used anywhere

irrespective of the place of deployment provided mobile network connectivity is available.

Now-a-days advertisement is going digital. The big shops and the shopping centers

use digital displays now. Also, in trains and buses the information like platform number, ticket

information is displayed in digital boards. People are now adapted to the idea of the world at

its fingertips. The use mobile phones have increased dramatically over years. Control and

communication has become important in all the parts of the world. Notice boards are one of

the widely used ones ranging from primary schools to major organizations to convey

messages at large.

In this modern world Mobile Phones and the related technologies are becoming more and

more prevalent. Various technical arenas in the field of Telecommunication and Embedded

Systems are becoming omnipresent in the people. The use of cell phones has rapidly

increased over the last decade and a half. Upgradation in networking technologies has

encouraged the development and growth of very dense networks. Now-a-days the general

mass prefer communicating while on the move therefore landlines usage has been drastically

reduced.

1.1

OBJECTIVE

The main objective is to design an automatic self-enabled highly reliable electronic notice

board, a display connected to a server system should continuously listen for theincoming call

from client or user process it and display it on the LCD/LED screen message displayed

should be updated every time the user sends new data only authenticated people should be

able to able to access the server.

1.2

PROBLEM STATEMENT

Notice boards are one of the basic things in any organisation or public utility places likes

hospitals, airports, bus stations, railway stations, shopping malls and parks.

It is time consuming and tedious process to manually write down the different notices

every now and then.

To overcome the problem, the idea of wireless digital display board has been proposed.

GSM technology aims in reducing the complexity for sending a message by

incorporating SMS (Short Message Service) technology.

CHAPTER 2

LITERATURE SURVEY

Neeraj Khera , Divya Shukla, Shambhavi Awasthi (2019) The development of simple

and low cost Android based wireless notice board is presented. The proposed system uses

eitherBluetooth or Wi-Fi based wireless serial data communication. For this purpose Android

based application programs for Bluetooth and Wi-Fi communication between Android based

personal digital assistant devices and remote wireless display board are used. At receiver

end, a low cost microcontroller board (Arduino Uno) is programmed to receive and display

messages in any of the above communication mode. Using the developed system, two

different applications for displaying messages on a remote digital notice board and wireless

person calling has been implemented. The developed system will therefore aims in wirelessly

sharing the information with intended users and alsohelps in saving the time and the cost for

paper and printing hardware.

Mr.P. Blalakrishna, T. Harini, E. Kanaka Jyothi (2021) Notice board is the primary

thing any institution, any Organization and public places like Bus stations, Railway stations

and Parks. But day-to-day work of sticking various notices is a hectic process which

demands a separate person to take care of this display. So, to avoid this burden, this paper

is proposed with an advanced hi-tch wireless notice board. It is built around a microcontroller

(AT mega 2560) which provides all the functionality of the display and wireless control.

The notice board has built with GSM technology and has extra features by the usage of

mobile application. By using mobile application, we can prevent accessing of any

unauthenticated users, falls subscribers and provides high Security. The notice sends

through SMS by incorporating GSM module facilitate the communication of displaying

message on the notice board via user’s mobile phone. In the present scenario, by using GSM

technology, Certain users are fixed to send the message and there is difficult in adding new

users but we Have used mobile app which helps in inserting and deleting user’s identity

according to the circumstances. This smart notice board is useful in real time applications

and information canbe given through our finger tips. It saves more time and reduces the cost

of printing. It has advantages of low power consumption and low cost

Kruthika Simha, Shreya, Chethan Kumar, Parinitha C, Shashidhar Tantry(2016) As

technology improves, efficient, financially affordable and highly productive output becomes

an absolute necessity, and this leads us to be more inclined towards using automated control

systems. Human intervention, although it offers variety, adaptability and interactivity, could

lead to errors, as it is a natural and inevitable result of this variability. Hence,

automation of a system is an accepted means to minimize human error and its impact.

Applying this to the situation under scrutiny now, the traditional methods ofwriting/ typing the

notice on paper, and having a man/woman deliver the notice to the respective groups, or

having him/her paste the notice on the notice board, is prone to errors. The person delivering

could deliver it to the wrong group, or tamper with the information being sent, etc.

Sayidul Morsalin, Abdur Rahman (2015) This paper elucidates a wireless digital

noticing system to provide information in an innovative and smart way. The proposed notice

board is a multiuser password-protected SMSbased system fabricated with an LCD. The

communication and information transfer between the authentic user and the LCD display unit

is done via GSM to ensure remote display facilities, so any notice can be displayed on the

electronic board from the user’s mobile SMS from distant places. To ensure system flexibility,

a multiuser noticing and displaying system has been implemented in the system which can

display several notices simultaneously. In addition, the user also can print any notice which is

of concern to them. The total system is designed with simple logic with a robust algorithm

and fabricated with a PIC midrange microcontroller, LCD, GSM module and other

commercially available electronic devices to ensure efficiency and reliability with less cost.

S. Arulmurugan, S. Anitha, A. Priyanga, S. Sangeethapriya at (2016) Notice boards

is commonly used in variety of institutions which we come across in a daily basis. Inthe

present generation the advertisement notice boards are being managed manually. This

process is difficult to involve in order putting a notices on the notice board. This waste a lot of

things likepaper printer ink, manpower and also brings the loss of time. In this paper we have

proposeda system through wireless transmit notices on a notice board using Wi-Fi. Wi-Fi can

pass information for about 100meter distance Wi-Fi data rate has 1 or 2 Mbps. It

accesses numerous point and to support network interfaces. It also makes the system

compatible with more than one wireless technology. This paper describes the Wi-Fi based

LCD display

Bhumi Merai, Rohit jain, Ruby Mishra at (2015) Notice board is primary thing in any

institution or organization or public utility places like bus stops, railway stations or parks.But

sending various notices day to day is a tedious process. This project deals with advanced

notice board. It presents an SMS based notice board incorporating the widely used GSM to

facilitate the communication of displaying message on notice board via user’s mobile phone.

Its operation is based on microcontroller AT89c52 programmed in assembly language. A

SIM300 GSM modem with a SIM card is interfaced to the ports of the microcontroller with the

help of AT commands. When the user sends a SMS via a registerednumber from his mobile

phone, it is received by SIM300 GSM modem at the receivers end. SIM300 is duly interfaced

to the microcontroller. The messaged is thus fetched into the microcontroller. It is further

displayed on an electronic notice board which equipped with LCD display interfaced to

microprocessor powered by a regulated power supply from mains. This project is our

experiment.

Anushree S P, Divyashree v Bhat, Moonish G A, Venkatesh U C (2014) Many state-

of- the-art and cutting-edge universities in the world rely on wooden notice boardhanging on

the wall to display announcements. The overreliance of this practice in a university is still not

enough to pass relevant information around as many problems are encountered. We

consider the case study of professional Colleges, where information is a vital key for knowing

the updates of the campus. The goal of this paper is to provide the access to notices and

articles quickly not only within the college premises, also wherever and whenever they need

to know. Also it looks at the development of the existing notice boards, making it run by the

internet access or by local area network (LAN) so as to increase the rate at which relevant

information is being disseminated to the public with no location restriction. The major strength

of the Electronic Notice Board developed, which is an online web application is that, its

usability is fully capable of passing relevant notices and announcements, and keeping the

users updated from time to time. The user is kept updatedeach time the E-Notice Board is

uploaded based on their preferences with respect to the departments and categories

through a SMS. Also the users can view the notices and articles anytime and from

anywhere by opening the web application E-Notice Board which is available online and this

makes our project highly efficient and effective.

Jaydeep Raiyani1 Mr. Dharmisht Dalsaniya at (2014) in his document gives Basic

instructions for Digital signage system using Wi-Fi. This gives basic introduction how to

operate with Digital Display wirelessly. In recent days we have digital signage system which

basically needs to change their contents using pen drive or using internet but this gives

introduction How to play with digital signage system wirelessly and enjoy good

advertisement.

Vinod B. Jadhav, Tejas S. Nagwanshi, Yogesh P. Patil, Deepak R. Patil at (2016)

had propose a remotely send notice to Digital Monitor from authorized PC on Raspberry pi

card. A Wi-Fi is using for Data transmission. At any time we can add or remove or alter the

text according to our requirement. A transmitter authorized PC is used for sending a notices.

At receiving end Wi-Fi is connected to raspberry pi. When an authorized user sends a notice

from his system, it is received by receiver. Wireless is a popular technology that allows an

electronic device to exchange data wirelessly over a computer network, including highspeed

wireless connections. The data is received from authenticated user.

CHAPTER 3

SYSTEM ANALYSIS

3.1

EXISTING SYSTEM

Below points indicate the existing methodology,In this project we use mobile phone totext the

message to be display on the LCD display. Whenever user wants to display the message,

user sends the message using his mobile defining the message to the number of the

subscriber identity module (SIM) which is inserted in the GSM. The GSM module receives

the message. AT(Attention) commands are serially transfer to the GSM from Arduino and

then in return the GSM modem transmit the store message through COM port. The Arduino

validates the message and then display the message in the LCD display board. Various time

division multiplexing techniques have been suggested to make the display boards function

efficiently.

In the existing system the messages(notice) are displayed on the black board or white board.

Sometimes it may erase due to improper writing and improper management. Boards are has

to regularly maintained or else it may get damaged. The Writing in the board are somewhat

difficult and hand may pain of writing more things and it not may be attractive to see for the

peoples.

Fig.3.1 Block diagram of existed system

3.2

PROPOSED SYSTEM

In this proposed project, arduino is used to control the whole process, GSM module (SIM

900A) to receive the message sent from the authenticated mobile handset and LCD (16*2) to

display the received SMS below shows the block diagram of wireless notice board using

GSM technology.The wireless GSM technology used in the proposed project to display

messages on the notice board is efficient, reliable, and faster with minimal errors. It is cost

effective system, requires very little maintenance, and is easy to handle and use. It fills the

role of conventional and old notice boards that require papers to write the messages. This

time consuming and tedious work has been replaced by wireless digital display board. From

small institutions to big organizations, the digital notice board is gaining popularity.

• Firstly interface GSM module and arduino Mega 2560 by connecting receiver, transmitter,

ground pins of GSM module to transmitter, receiver and ground pins of arduino

mega2560respectively.

• Provide power supply to all the components. With the help of arduinoIDE, execute the

program Load the program into arduino mega 2560 controller using USB cable.Insert the

SIM into SIM slot in GSM module.

• Send an SMS to the GSM module using mobile app. Now you can observe the same

message on the output display board.

• Sending messages from any of the remote area to the distant located Electronic-notice

board using GSM.

• For sending the text message from remote area we need to interface the mobile phone

with GSM.

• For developing some of GSM based applications we need to have some commons

peripherals including GSM MODEM., SIM, Arduino board, LED, power supply and

connecting wires.

Fig.3.2 Block diagram of proposed system

CHAPTER 4

REQUIREMENT SPECIFICATION

4.1

FEATURES

User friendly: Messages are only to be typed on a mobile or a computer, which in turn are

displayed wirelessly on the display unit.

Eliminates use of printers: Since we don’t use papers to display information, printers are also

of no use in this system.

Faster means of transferring information: There is no delay in transmission of information.

Messages are displayed in a matter of seconds after typing.

Long Range: As long as we have the required network A GSM modem is a specific type of

modem which accepts a SIM card. Itoperates over a subscription to a mobile operator, just

like a mobile phone. From the mobile operator perspective, a GSM modem looks just like a

mobile phone. A GSM modem exposes an interface that allows applications such as Now

SMS for sending and receiving messages over the modem interface. At the time you

install your GSM modem, or when connecting your GSM mobile phone to the computer, be

sure about installing the appropriate Windows modem driver from the device manufacturer.

The Now SMS & MMS gateway can concurrently support various multiple modems, provided

that your computer hardware has the accessible communications port resources. Coverage

we can send messages from any part of the world.

4.2

HARDWARE COMPONENTS

• GSM module

• Arduino UNO

• LED

4.3

SOFTWARE COMPONENTS

• EMBEDDED C

• ARDUINO IDE

Fig.4.1 Working of proposed system

CHAPTER 5

DESCRIPTION OF PROPOSED SYSTEM

5.1

GSM Module

A GSM modem is a specific type of modem which accepts a SIM card. It operates

over a subscription to a mobile operator, just like a mobile phone. From the mobile

operator perspective, a GSM modem looks just like a mobile phone. A GSM modem

exposes an interface that allows applications such as Now SMS for sending and

receiving messages over the modem interface. At the time you install your GSM

modem, or when connecting your GSM mobile phone to the computer, be sure about

installing the appropriate Windows modem driver from the device manufacturer. The

Now SMS & MMS gateway can concurrently support various multiple modems,

provided that your computer hardware has the accessible communications port

resources.

Fig.5.1 Gsm module

GSM is a mobile communication modem; it is stands for global system for mobile

communication (GSM). The idea of GSM was developed at Bell Laboratories in 1970. It

is widely used mobile communication system in the world. GSM is an open and digital

cellular technology used for transmitting mobile voice and data services operates at the

850MHz, 900MHz, 1800MHz and 1900MHz frequency bands.

GSM system was developed as a digital system using time division multiple access

(TDMA) technique for communication purpose. A GSM digitizes and reduces the data,

then sends it down through a channel with two different streams of client data, each in

its own particular time slot. The digital system has an ability to carry 64 kbps to 120

Mbps of data rates.

There are various cell sizes in a GSM system such as macro, micro, pico and umbrella

cells. Each cell varies as per the implementation domain. There are five different cell

sizes in a GSM network macro, micro, pico and umbrella cells. The coverage area of

each cell varies according to the implementation environment.

5.1.1

GSM ARCHITECTURE

A GSM network consists of the following components:

• A Mobile Station:It is the mobile phone which consists of the transceiver, the display

and the processor and is controlled by a SIM card operating over the network.

• Base Station Subsystem:It acts as an interface between the mobile station and the

network subsystem. It consists of the Base Transceiver Station which contains the

radio transceivers and handles the protocols for communication with mobiles. It also

consists of the Base Station Controller which controls the Base Transceiver station

and acts as a interface between the mobile station and mobile switching centre.

• Network Subsystem:It provides the basic network connection to the mobile stations.

The basic part of the Network Subsystem is the Mobile Service Switching Centre

which provides access to different networks like ISDN, PSTN etc. It also consists of

the Home Location Register and the Visitor Location Register which provides the call

routing and roaming capabilities of GSM. It also contains the Equipment Identity

mobile is identified by its own IMEI number. IMEI stands for International Mobile

Equipment Identity.

Fig.5.2 Gsm module architecture

5.1.2

GSM MODEM WORKING PRINCIPLE

A GSM modem is a device which can be either a mobile phone or a modem device

which can be used to make a computer or any other processor communicate over a

network. A GSM modem requires a SIM card to be operated and operates over a

network range subscribed by the network operator. It can be connected to a computer

through serial, USB or Bluetooth connection.

A GSM modem can also be a standard GSM mobile phone with the appropriate cable

and software driver to connect to a serial port or USB port on your computer. GSM

modem is usually preferable to a GSM mobile phone. The GSM modem has wide

range of applications in transaction terminals, supply chain management, security

applications, weather stations and GPRS mode remote data logging.

Some GSM Modems also has GPRS feature that allows transmission of data over TCP/

IP (internet).To transmit data using GSM Modem, there are various methods that can be

used, such as:

• SMS

• CSD or HSCSD

• GPRS / UMTS

• AT commands with a GSM/GPRS MODEM or mobile phone can be used to access

following information and services:

• Information and configuration pertaining to mobile device or MODEM and SIM card.

• SMS services.

• MMS services.

• Fax services.

• Data and Voice link over mobile network.

5.2

Arduino UNO

An Arduino is actually a microcontroller based kit which can be either used directly by

purchasing from the vendor or can be made at home using the components, owing to

its open source hardware feature. It is basically used in communications and in

controlling or operating many devices. It was founded by Massimo Banzi and David

Cuartielles in 2005.

The Arduino Uno is a microcontroller board based on the ATmega328. It has 14 digital

input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz

crystal oscillator, a USB connection, a power jack, an ICSP header, and a reset button.

It contains everything needed to support the microcontroller; simply connect it to a

computer with a USB cable or power it with a AC-to-DC adapter or battery to get

started.

The Uno differs from all preceding boards in that it does not use the FTDI USB-to-serial

driver chip. Instead, it features the Atmega8U2 programmed as a USB-to-serial

converter. "Uno" means one in Italian and is named to mark the upcoming release of

Arduino 1.0. The Uno and version 1.0 will be the reference versions of Arduino, moving

forward.

Fig.5.3 Arduino uno

The Uno is the latest in a series of USB Arduino boards, and the reference model for

the Arduino platform; for a comparison with previous versions.

Arduino is an open-source platform used for building electronics projects. Arduino

consists of both a Physical programmable circuit board (often referred to as a

microcontroller ) and apiece of software ,or IDE (Integrated Development Environment)

that runs on your computer ,used to write and upload computer code to the physical

board. The Arduino platform has become quite popular with people just starting out with

electronics, and for good reason. Unlike most previous programmable circuits

board ,the arduino does not need a separate piece of hardware (called a programmer)

in order to load code into the board – you can simply use a USB cable . Finally, Arduino

provides a standard form factor that breaks out the functions of the micro-controller into

a more accessible package.

5.2.1

ARDUINO ARCHITECTURE

Arduino’s processor basically uses the Harvard architecture where the program code

and program data have separate memory. It consists of two memories- Program

memory and the data memory.The code is stored in the flash program memory,

whereas the data is stored in the data memory. The Atmega328 has 32 KB of flash

memory for storing code (of which 0.5 KB is used for the bootloader), 2 KB of SRAM

and 1 KB of EEPROM and operates with a clock speed of 16MHz.

The most important advantage with Arduino is the programs can be directly loaded to

the device without requiring any hardware programmer to burn the program. This is

done because of the presence of the 0.5KB of Bootloader which allows the program to

be burned into the circuit. All we have to do is to download the Arduino software and

writing the code.

Fig.5.4 Arduino uno architecture

5.3. LED

LED Display (light-emitting diode display) is a screen display technology that uses a

panel of LEDs as the light source. Currently, a large number of electronic devices, both

small and large, use LED display as a screen and as an interaction medium between

the user and the system. Modern electronic devices such as mobile phones, TVs,

tablets, computer monitors, laptops screens, etc., use a LED display to display their

output.

LED Display is one of the main screen displays that are being commercially used. The

biggest advantage of the LED display is its efficient and low-energy consumption, which

is especially needed for handhelds and chargeable devices such as mobile phones and

tablets. An LED display consists of a number of LED panels that, in turn, consist of

several LEDs. LEDs have numerous advantages over other light-emitting sources that

can be used alternatively. Aside from being power efficient, LEDs produce more

brilliance and greater light intensity. LED Display is different from the vacuum

fluorescent display used in some consumer electronics such as car stereos,

videocassette recorders, etc., and, hence, these two should not be confused with each

other.

Fig.5.5 LED

5.4

Power supply

Power Supply With maximum allowable transients of 10mv, the power supply should be

of +5V., the voltage (VL) at pin 3 should be adjusted properly to accomplish a

suitable dissimilarity for the display. From a live circuit, a module should not be

inserted or uninvolved. The ground terminal of the power supply should be secluded

properly so that no voltage is induced in it. The module must be secluded from the

other circuits, hence that stray voltages are not induced that could cause a flickering

display.

Fig 5.6 Power Supply unit

Fig.5.7 Arduino uno interconnecting with gsm

5.5

EMBEDDED C

Embedded C is a set of language extensions for the C Programming languageby

the C Standards committeeto address commonality issues that exist between C

extensions for different embedded systems. Historically, embedded C programming

requires nonstandard extensions to the C language in order to support exotic features

such as fixed-point arithmetic, multiple distinct memory banks, and basic I/Ooperations.

In 2008, the C Standards Committee extended the C language to address these

issues by providing a common standard for all implementations to adhere to. It includes

a number of features not available in normal C, such as, fixed-point arithmetic, named

address spaces, and basic I/O hardware addressing.

Embedded C uses most of the syntax and semantics of standard C, e.g., main()

function, variable definition, data type declaration, conditional statements (if, switch,

case), loops (while, for), functions, arrays and strings, structures and union, bit

operations, macros, etc. A Technical Report was published in 2004 and a second

revision in 2006. It is small and simpler to learn, understand, program and debug.

Compared to assembly language, C code written is more reliable and scalable,

more portable between different platforms. C compilers are available for almost all

embedded devices in use today, and there is a large pool of experienced C

programmers.

Unlike assembly, C has advantage of processor-independence and is not

specific to any particular microprocessor/microcontrolleror any system. This makes it

convenient for a user to develop programs that can run on most of the systems.

As C combines functionality of assembly language and features of high level

languages, C is treated as a ‘middle-level computer language’ or ‘high level assembly

language’. It is fairly efficient. It supports access to I/O and provides ease of

management of large embedded projects.

Java is also used in many embedded systems but Java programs require the Java

Virtual Machine (JVM), which consumes a lot of resources. Hence it is not used for

smaller embedded devices. Other High-level programming languagelike Pascal,

FORTRAN also provide some of the advantages.

CHAPTER-6

IMPLEMENTATION OF SYSTEM

6.1

APPLICATION

• GSM based Electronic notice board can be widely used for multitude of

applications including educational sector, traffic control, banks, public

advertisements, stock exchanges etc.

• Educational Institutions and Organization: Currently we rely on putting up

papers on noticeboard to inform people of events.

• This method can be discarded by using wireless notice boards to

display information in real time.

• Crime Prevention: Display board put up on roads will display tips on public

security, accident prevention, information on criminals on the run. The board

will help flash messages such as vehicle thefts as andwhen they occur.

• Managing Traffic: In metropolitan cities we frequently come across traffic

jams. One way to avoid this would be inform people beforehand to take

alternative routes. A wireless notice board serves well for this purpose.

• Advertisement: In shopping malls we get to hear the offers on various

products from time to time.

• Instead we continuously display the information regarding the products and

related offers on electronic display boards.

• Railways Station: Instead of announcing the delay in arrival of trainswe can

display the information.

• SMS Gateway ie. to send and receive SMS

• Telemetric to collect data from remote terminals

• Call-back service for VOIP

• SMS application, SMS solution, or SMS programme

• Automatic reloading of prepaid account with STK API

• Machine to machine communication

• Sending SMS from PC

• Automating business process

• Vehicle tracking with cell broadcast feature or with integrated GPS terminal

6.2

ADVANTAGES:

• Easy to maintain.

• More attractive.

• Time consuming and tedious work has been replaced by wireless digital

•

The wordings in the board are not static it may erases due to some improper

management, but the proposed system rectifies.

•

Boards has to maintained regularly or else sometimes crack might happen in the

board could be overcome by LED

CHAPTER 7

CONCERNS AND STANDARDS

7.1

CONCERNS

Nowadays conveying messages at large using notice boards are widely used

ones ranging from schools to organizations. We know the significance of notice

boards in public areas like bus stands, railway stations, airports, and banks, etc. But

day to day changing these boards is a very difficult task and a waste of time. At

present, all electronic boards are designed with a wired system. The major drawback

of designing these boards is; not flexible and cannot be located anywhere due to

messy wire. To overcome this problem, a wireless board is designed to display the

latest information. This article gives you an overview of how to design a wireless

electronic notice board using GSM technology. This notice board displays the

information on LCD display whatever you sent from the mobile.

7.2

STANDARDS

GSM- GSM is the most widely accepted standard in telecommunications and it is implemented

globally. GSM is a circuit-switched system that divides each 200 kHz channel into eight 25 kHz

time-slots. GSM operates on the mobile communication bands 900 MHz and 1800 MHz. GSM

makes use of narrowband Time Division Multiple Access (TDMA) technique for transmitting

signals. GSM was developed using digital technology. It has an ability to carry 64 kbps to 120

Mbps of data rates.

EMBEDDED C- Embedded C programming plays a key role in performing specific function by

the processor. In day-to-day life we used many electronic devices such as mobile phone,

washing machine, digital camera, etc. These all device working is based on microcontroller that

are programmed by embedded C.

CHAPTER-8

RESULT

When an sms sent through mobile app or phone, it will display in the lcd. For

this to happen, the program written in Arduino IDE is loaded to the Arduino board.

Scrolling function in LED is used to scroll the message from either right to left or left

to right. LED boards available in different sizes 16,2&16,4 etc.

Fig.8.1 Final Output

CHAPTER-9

CONCLUSION AND FUTURE WORKS

9.1

CONCLUSION

The prototype of the GSM based electronic notice board is designed successfully. It

can be easily integrated with all general purpose display board and thus proving its

mobility. The system accepts the message to be displayed in the form of Short

Message Service (SMS), stores it, checks for its validation and then displays it on the

display unit if it from an authorized user. This system supports only one message

at a time. This limitation can be tackled by use of higher end microcontroller and

extended RAM. The proposed system can be efficiently used for transfer of message

instantly in the campus.

Now a days every advertisement is going to be digital. The big shops and shopping

centers are using the digital moving displays now. In Railway station and bus stands

everything from ticket information to platform number etc is displayed on digital moving

displays. But in these displays if they want to change the message they have to go to

the place of the display and connect the display to PC or laptop. Suppose the same

message is to be displayed in main centers of cities to display critical messages then

we have to go there with a laptop and change the message by connecting it to the

display board.

This project can be used mainly for police or army to display something crucial within a

matter of seconds So keeping this in mind we are designing a new display system

which we can access remotely, thus utilising GSM technology. This project is a remote

notice board with modem connected to it, so if the user wants to display some

messages, he will send the messages in SMS format. The modem in the display

system will receive the message and update the display according to the message. For

every message received, the system will check for the source number and if the source

number incorrect the controller will display the message. The outcome of this project is

an embedded system providing wireless transmission from one point to the other via a

GSM network.

This system not only eliminates the shortcomings of the previous methods used to

inform the masses but also is a reliable and fast medium for data transmission. Apart

from the wide applications already mentioned, it has wide scope for further

enhancements in the field of embedded systems where telecommunication is a vital

part of the system and thereby holds the power to change the face of present

communication systems’

9.2

FUTURE WORKS

Temperature display during periods wherein no message buffers are empty is one

such theoretical improvement that is well possible. Another very interesting and

significant improvement would be to accommodate multiple receiver MODEMS at

different positions in the geographical area carrying duplicate SIM cards. Multilingual

display can be another added variation in the project we can able to store messages

for long time by using SD memory card.

• A larger out door LED screen should be used which can display both

text and graphics and can withstand all weather conditions, thus, can be

used outside buildings. This will also accommodate more characters.

• External EEPROM should be incorporated into the system; this will

enable the storage of more number of messages

• Future models can be designed to use dual SIM cards in order to safeguard

against network failures and disruptions.

• Incorporation of a surveillance camera on the screen as a security major

against theft and vandalism.

• The slow switching speed of the relay used in the switching circuit in the PSU

defeats our aim of using the battery as a standby. The syste switches OFF

completely and then ON again during the switching process which should not

be so. To overcome this, a device that switches faster,e.g. a transistor should

be used to design the switching circuit. This will improve system performance

and reliability

REFERENCES

1. Article named “Wireless data transmission over GSM Short Message Service”

retrieved from http://www.eacomm.com/downloads/products/textbox/wdtgsm.pdf

2. Darshankumar C. Dalwadi, Ninad Trivedi , Amit Kasundra “Wireless notice

board our real-time solution” National Conference on Recent Trends in

Engineering & Technology.

3. Nivetha S. R, Pujitha. R, Preethi Selvaraj & Yashvanthini S.M “SMS based

Wireless Notice board with monitoring system” International Journal of

Advanced Electrical and Electronics Engineering, (IJAEEE) ISSN (Print) :

2278-8948, Volume-2, Issue-3, 2013.

4. Price of Basys™2 Spartan-3E FPGA Board retrieved on 13th August 2014

from http://www.digilentinc.com/Products

5. P. K. Gaikwad “Development of FPGA Microblaze processor and GSM based heart rate

monitoring system” International Journal of Computer Science and Mobile Applications,

Vol.1 Issue.3, September-2013, pg. 24-29 ISSN: 2321-8363

6. SIMCom SIM900 AT Commands Manual Version 1.11 r from http://

www.seeedstudio.com/wiki/images/7/72 /AT_Commands_v1.11.pdf.

7. Article titled “Autorun browser on startup” retrievedfrom http://www.raspberry-

projects.com/pi/pi-operating%20system s/raspbian/gui/auto-run-browser-on-startup

8. Article titled “How to hide text on boot” retrieved from http://raspberrypi-

easy.blogspot.in/2013/12/how-hide-texton-boot.html

9. Article titled “How to hide Raspberry Pi LOGO on boot” retrieved from http://

raspberrypieasy.blogspot.in/2013/12/how-to-hide-raspberry-pi-logo-onboost.html

APPENDIX

A. SOUREC CODE:

#include <SPI.h> //SPI.h must be included as DMD is written by SPI (the IDE

complains otherwise)

#include <DMD.h>

#include <TimerOne.h>

#include "SystemFont5x7.h"

#include "Arial_black_16.h"

#include <EEPROM.h>

//*123456789012#

//Fire up the DMD library as dmd

#define DISPLAYS_ACROSS 2

#define DISPLAYS_DOWN 1

DMD dmd(DISPLAYS_ACROSS, DISPLAYS_DOWN);

//number max of characters in your message

#define max_char 100

char message[max_char]; // stores you message

char mess[max_char]; // stores you message

//char mess[max_char];

char r_char; // reads each character

byte index = 0; // defines the position into your array

int i;

char inputString[100]; // a string to hold incoming data

int str,stp;

Interrupt handler for Timer1 (TimerOne) driven DMD refresh scanning, this gets

called at the period set in Timer1.initialize();

void ScanDMD()

{

dmd.scanDisplayBySPI();

}

void setup(void)

{

//initialize TimerOne's interrupt/CPU usage used to scan and refresh the display

Timer1.initialize( 1000 ); //period in microseconds to call ScanDMD. Anything

longer than 5000 (5s) and you can see flicker.

Timer1.attachInterrupt( ScanDMD ); //attach the Timer1 interrupt to ScanDMD which

goes to dmd.scanDisplayBySPI()

//clear/init the DMD pixels held in RAM

dmd.clearScreen( true ); //true is normal (all pixels off), false is negative (all pixels on)

Serial.begin(9600);

Serial.println("SCROLLING DISPLAY");

delay(1000);

Serial.flush();

int j;

for(j=0;j<100;j++)

message[j]= EEPROM.read(j);

}

void loop(void)

{

//check if serial is avaible an before reading a new message delete's the old message

if(Serial.available())

{

for(i=0; i<99; i++){

// message[i] = '\0';

mess[i] = '\0';

}

//resests the index

index=0;

}

//while is reading the message

while(Serial.available() > 0){

//the message can have up to 100 characters

dmd.clearScreen( true );

if(index < (max_char-1))

{

r_char = Serial.read(); // Reads a character

mess[index] = r_char; // Stores the character in message array

index++; // Increment position

// message[index] = '\0'; // Delete the last position

}

int i;

for(i=0;i<100;i++)

{

if(mess[i]=='*')

{

str=i;

}

if(mess[i]=='#')

{

stp=i;

}

if(stp>0)

{

for(i=0; i<99; i++){

message[i] = '\0';

}

for(i=(str+1);i<stp;i++)

message[i-1]=mess[i];

str=0;

stp=0;

for(i=0;i<100;i++)

EEPROM.write(i,message[i]);

}

//prepares the display to print our message

dmd.selectFont(Arial_Black_16);

Serial.println(message);

dmd.drawMarquee(message ,strlen(message)+10,(32*DISPLAYS_ACROSS)-1,1);

// Serial.print('*');

//Serial.print(message);

//Serial.println('#');

long start=millis();

long timer=start;

boolean ret=false;

while(!ret)

{

if ((timer+60) < millis()) {

ret=dmd.stepMarquee(-1,0);

timer=millis();

}

B.SCREENSHOTS