wireless electronic notice board using gsm technology
TRANSCRIPT
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KATHFORD INTERNATTIONAL COLLEGEBALKUMARI, LALITPUR
WIRELESS ELECTRONIC NOTICE BOARD
USING GSM TECHNOLOGY
Prepared by:
Bishnu lamichhane
Lokendra bdr. Jargha
Saban kumar kc
Sandesh pandit
Guided by:
Bipin Timilsina
AUGUST,2013
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CHAPTER1. INTRODUCTION
CHAPTER2. TECHNICAL DETAILS
CHAPTER3. SYSTEM DESIGN & IMPLIMENTATION
CHAPTER4. EPILOUGE
PRESENTATION OUTLINE
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A BRIEF DISCRIPTION
WENB is wireless data transfer for quick display of messages in real time.
Display SMS sent from Mobile phone
Multiuser can update notices by sending SMS with password.
for a purpose of relying urgent information
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OBJECTIVES
To display the message on display board through SMS.
To effectively receive and transmit data via SMS.
To eliminate the need of being physically present to hangout the paper notices.
To provide reliable, authenticated ,user friendly display system.
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MOTIVATION
Currently we rely on putting up notices on the notice boards using papers.
Traditional display system should be reprogrammed via software to display new messages.
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BLOCKDIAGRAM
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WORKING FLOW DIAGRAM
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8-bit microcontroller
8KB on-chip Flash memory /ROM
256 bytes RAM
3 timer/counters
one serial including receiver & transmitter buffer
four 8-bit parallel programmable ports.
AT89S52 ( Atmel )
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Microcontroller-89S52
GSM MODEM –SIM300
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12V ADAPTER LINE
ANTENNA
SIM
RS232 INTERFACE
NET
WO
RK
IND
ICATO
R
AT COMMANDS
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•AT+CMGD – to delete SMSSyntax: AT+CMGD=1 -> deletes 1st sms in simcard
•AT+CMGR – to read SMSSyntax: AT+CMGR=1 -> reads 1st sms in sim
card
•AT+CMGS – to send SMSSyntax: AT+CMGS=9849093784 press enterType text”HELLO” and press ctrl+z
AT commands are used to control MODEMs
MAX232
It changes a TTL to RS232 Logic and vice versa. (TTL
Logic 0 to between +3 and +25 V) & (TTL Logic 1 to
between -3 to -25 V) 13
DISPLAY UNIT
LCD
HD44780 LCD for displaying the text data
16 character x 2 line display module
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DISPLAY UNIT
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5-DIGIT 5*7 LED MATRIX DISPLAY
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FLOW CHART
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ACEDEMIC LEVELDEMO DESIGNED
FORKATHFORD INTERNATIONAL COLLEGE
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SERVER MAN AS
MESSAGE
CONTROLLER
OTHERS
•TEACHERS
•STUDENTS
HOD SECTION
•BELX
•BCT
•BCL
PRINCIPLEEXAM
SECTION
CRs LIBRARY
NOT
AUTHENTICATED
PRINCIPLE’S MESSAGE
HELLO STUDENTS
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WHEN AUTHENTICATD SENDER SENDS A MESSAGE?
DEMO1:
LIBRARY’S MSG
BELX IV/II: QUESTION BANK IS READY
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DEMO2:
MSG FROM UNKNOWN
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WHEN UNAUTHENTICATD SENDER SENDS A MESSAGE?
DEMO3:
BEST OF LUCK
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DEMO4:
DESIGN AND SIMULATION
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SCHEMATIC DIAGRAM OF INTERFACING WITH 16*2 LCD LCD
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SCHEMATIC DIAGRAM OF INTERFACING WITH LED METRIX DISPLAY BOARD
3-8 DECODER
74LS138
4-16
DECODERS
74159
5*7
LEDMATRIX
Call control :
Data card Control :
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MERITS
User friendly : Messages are only to be typed on a mobile
Eliminates use of printers : Since we don’t use papers to display information
Faster means of transferring information : There is no delay in transmission of information.
Long Range : As long as we have the required network coverage we can send messages from any part of the world.
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DE MERITS
Dependent on signal strength : Messages are not transmitted if there is weak network coverage.
Volatile memory used for message storage : Messages last only as long as power is ON.
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APPLICATIONS & USAGES
Educational Institutions and Organizations
Advertisement
Bus Stations
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FUTURE ENHANCEMENT
Currently in our project we are using onboard RAM memory to save a single message. To overcome this shortcoming we can interface an EEPROM to save messages
The same principle can be applied to control electrical appliances at a distant location.
Robots can be controlled in a similar fashion by sending the commands to the robots.
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RESULT & CONCLUSION
Hence, we are succeed to display the text message .
Reliable, Authenticated & User friendly display system.
Finally, Project helped us to implement the theoretical principles learned during the four years course
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SNAPSHOT OF OUR SYSTEM
MICROCONTROLLER
89S52
RS232 INTERFACE
POWER SUPPLY
MAX232
GSM MODEM-SIM300
16*2 LCD DISPLAY
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SNAPSHOT OF OUR SYSTEM
MICROCONTROLLER
89S52
RS232 INTERFACE
POWER SUPPLY
MAX232
GSM MODEM-SIM300
16*2 LCD DISPLAY
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REFERENCES
http://en.wikipedia.org/
http://www.atmel.com/
http://images.google.com/
http://www.datasheetcatalog.com
http://www.keil.com/forum/docs
Datasheet: SIM 300 GSM MODEM Manual
Datasheet: ATMEL 89S52 Microcontroller
Datasheet: LCD HD44780
Datasheet: MAX 232
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THANKYOU!