Mini p gsm based display

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Mini p gsm based display

  1. 1. MINI PROJECT REPORT OnSYNOPSIS OF GSM BASED ELECTRONIC NOTICE BOARD SUBMITTED BY: Ashutosh Singh 0821331024 Akash Chandel 0821331005 BTech ECE 4th Year--------------------------------------------------------------------------------------------------- Department of Electronics and Communication Engineering Hindustan Institute of Technology I
  2. 2. 32, 34, Knowledge Park-III, Greater Noida, U.P TABLE OF CONTENTS1. Acknowledgement2. Introduction3. Methodology4. Scope of Work5. Aims of GSM electronics board6. Objectives of the GSM electronics board7. Theoretical Background8. GSM architecture9. GSM frequencies10.Main Cellular Standards11.Literature Review12.Network Structure13.Subscriber Identity Module(SIM)14.Tentative model to be employed15.Main Circuit Diagram16.Programmer II
  3. 3. 17.Conclusion INTRODUCTIONGSM and GPRS based Designs have developed another innovative andPublic utility product for mass communication . This is a Scrolling (Moving)Message Electronic Display Board which displays the messages received asSMS or GPRS Packets. Such Displays can be kept at differentparts of the city and the messages like Advertisements, News. Public cansend flash information from Mobiles or PCs to these displays for instantviewing. These displays are designed to quickly display large amounts ofinformation in the liquid crystal display. Wireless communication hasannounced its arrival on big stage and the world is going mobile . Wewant to control everything and without moving an inch. This remote controlelectronic notice board is possible through Embedded Systems. The use of“Embedded System in Communication” has given rise to many interestingapplications that ensures comfort and safety to human life. The main aim ofthe project will be to design a SMS electronic display toolkit which canreplace the currently used programmable electronic display. The message tobe displayed is sent through a SMS from an authorized mobile phone. Thetoolkit receives the SMS, validates the sending Mobile Identification III
  4. 4. Number (MIN) and displays the desired information after necessary codeconversion. The system is made efficient by SIMs so that the SMS can bereceived by number of display boards in a locality using techniques of timedivision multiple access. I have improved upon the currently usedprogrammable electronic display and tried to take advantage of thecomputing capabilities of microcontroller. I envision a toolkit that will notonly display message but also can be used to do some mechanical work.Looking into current trend of information transfer in this campus (SHARDAUNIVERSITY), it is seen that important notice take time to be displayed onthe notice boards. This latency is not expected in most of the cases andmust be avoided. It is proposed to implement this project at the institutelevel. It is proposed to place display boards in major access points. Theelectronics displays which are currently used are programmable displayswhich need to be reprogrammed each time. This makes it inefficientfor immediate information transfer, and thus the display board loses itsimportance. The GSM based display toolkit can be used as add-on to thisdisplay boards and make it truly wireless. The display board programs itselfwith the help of the incoming SMS with proper validation. Such asystem proves to be helpful for immediate information transfer. The systemrequired for the purpose is nothing but a Microcontroller based SMS box.The main components of the toolkit include microcontroller, GSM modem.These components are integrated with the display board and thus incorporatethe wireless features. The GSM modem receives the SMS. The ATcommands are serially transferred to the modem through MAX232. In returnthe modem transmits the stored message through the wireless link. Themicrocontroller validates the SMS and then displays the message in the LCDdisplay board. Various time division multiplexing techniques have been usedto make the display boards functionally efficient. The microcontroller IV
  5. 5. used in this case is ATMEL AT89S52 .Motorola C168 is used as the GSMmodem. In this prototype model, LCD display is used for simulationpurpose. The results presented in the thesis support the proper functionalitiesand working of the system. The timing diagram suggests the response of themodem to various AT (attention) commands. METHODOLOGYThe method used to carry out this project is the principle of serialcommunication in collaboration with embedded systems. This is a very goodproject for college, police etc. This project has a moving message display,which will be used as the digital notice board, and also a GSM modem,which is the latest technology used for communication between the mobileand the embedded devices. System will work like when the user wants todisplay or update the notice board, he has to send the message in his mobiledefining the messages and then the password of the system to the number ofthe subscriber identity module (SIM) which is inserted in the display systemMODEM. Then, the MODEM connected to the display system will receivethe SMS, the microcontroller inside the system is programmed in such a waythat when the modem receives any message the microcontroller will read themessage from serial headphone and verify for the password, if the passwordis correct then it will start displaying the messages in the display system. V
  6. 6. SCOPE OF WORKWe will use liquid crystal display for displaying the message; We will alsouse GSM modem (Motorola c168) as my display interface. The LCD displayis limited to display 18 characters; the reason is because we are using 16 by2 LCD. The LCD can be replacing with larger type without anyprogramming. I will send message from any phone irrespective of the GSMnetwork to the modem connected to the programmable device using apassword. The message will display on the liquid crystal display connectedto the programmable display. VI
  7. 7. AIMS OF THE GSM ELECTRONIC NOTICE BOARD Uses in Banks: There is a huge mass of population which depends uponthe banks for all their monetary transactions. To keep a proper track of suchhuge mass of people and their transactions this technology helps with certaindegree of effectiveness. Uses for Traffic Control : It’s known to all of us that traffic are the goodservants of the people and also the major invention to help people but only ifit is managed well otherwise we all know Bangalore’s traffic how ridiculousand irritating it can be. So with the use of this technology we can maintainthe flow of traffic according to the needs of the people and also consideringthe availability of roads. Uses for advertisement : We can make use of this technology to displaythe different advertisement on display panels to reach the larger number ofpeople at a time and in the populated places like shopping malls, road sides VII
  8. 8. as well as at the theaters, discos, hotels, motels, restaurants etc… about theirproducts and features. Uses in Educational sector : Currently in Nigeria we are relying on theold style of displaying news by hanging bare time consuming papers on thenotice board which can be replaced by remote controlled notice boards at thecolleges and universities, also at the time of examination scheduling andresult publishing etc. Information purpose: It would be wiser to make a use of this technologyfor information purpose like news and its updates, real time reporting, livetelecasting, inclusive of various information which adds to the advanced andbusy life on daily basis. Stock Exchange: The stock exchange is the hot topic nowadays. Thereare millions of sales of shares every hours and it is very necessary tomaintain the real time services with the certain measures of reliabilitybecause it deals with the money large number of the small or biggerinvestors. With the help of this technology we can make it far easier andreliable. VIII
  9. 9.  Organizations: Every organization has large number of employees whoare assigned to accomplish the various tasks and each and everything shouldbe documented for the future reference purpose. And also their scheduleswork reports, leaves, presentation as well as distribution of salary etc… OBJECTIVES OF THE GSM ELECTRONIC NOTICE BOARD Programming of the mobile phone with AT (Attention) commandsequence Interfacing the programming chip with the personal computer Interfacing the programmable chip with the electronic board display Interfacing of the mobile phone with the programmable chip Sending messages from the remote phone to the electronic board IX
  10. 10. THEORETICAL BACKGROUNDGSM (Global System for Mobile communications: originally fromGROUPE Spécial Mobile) is the most popular standard for mobile phones inthe world. Its promoter, the GSM Association, estimates that 80% of theglobal mobile market uses the standard. GSM is used by over 3 billionpeople across more than 212 countries and territories . Its ubiquity makesinternational roaming very common between mobile phone operatorsenabling subscribers to use their phones in many parts of the world. GSMdiffers from its predecessors in that both signaling and speech channels aredigital, and thus is considered a second generation (2G) mobile phonesystem . This has also meant that data communication was easy to build intothe system X
  11. 11. GSM ARCHITECTUREGSM is a complex system and difficult to understand. The Mobile Station(MS) refers to the mobile equipment . The Base Station Subsystem controlsthe radio link with the Mobile Station. The Network Subsystem performsmain functions such as switching of calls between mobile users, mobilitymanagement operations, and proper operation and setup of a network .These functions are controlled by the Mobile Services Switching Center(MSC). GSM FREQUENCIESGSM networks operate in a number of different frequency ranges (separatedinto GSM frequency ranges for 2G and UMTS frequency bands for 3G).Most 2G GSM networks operate in the 900 MHz or 1800 MHz bands. Somecountries in the Americas (including Canada and the United States) use the850 MHz and 1900 MHz bands because the 900 and 1800 MHz frequencybands were already allocated. Most 3G GSM networks in Europe operate inthe 2100 MHz frequency band . XI
  12. 12. MAIN CELLULAR STANDARDS XII
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  14. 14. LITERATURE REVIEWThis project is an implementation to the idea of the wireless communicationbetween a mobile phone and a microcontroller. Currently the main work thathas been done on this proposed system is through serial port to the computerbut not wireless. If they want to change the message, they have to go to theremote area with the laptop and change the message. The system has to bereprogrammed to display new messages. But in this new design, the systemsneed not be reprogrammed to display new messages because it is wireless.The user will send SMS from his phone and it will be display on theelectronic board which is being made up of liquid crystal display. In the newsystem, when new messages enter, the old messages will be deleted.GSM was designed with a moderate level of security. The system wasdesigned to authenticate the subscriber using a pre-shared key andchallenge-response. Communications between the subscriber and the basestation can be encrypted. XIV
  15. 15. As we see in the above figure, there are at least three interfacing circuits,MAX-232 with Microcontroller, LCD display with microcontroller, andMAX-232 with GSM MODEM. XV
  16. 16. NETWORK STRUCTUREThe network behind the GSM seen by the customer is large and complicatedin order to provideall of the services which are required. The Base Station Subsystem (the base stations and their controllers). The Network and Switching Subsystem (the part of the network mostsimilar to a fixed network). This is sometimes also just called the corenetwork. The GPRS Core Network (the optional part which allows packet basedInternet connections). All of the elements in the system combine to produce many GSMservices such as voice calls and SMS.SUBSCRIBER IDENTITY MODULE (SIM)One of the key features of GSM is the Subscriber Identity Module,commonly known as a SIM card. The SIM is a detachable smart cardcontaining the users subscription information and phone book. This allows XVI
  17. 17. the user to retain his or her information after switching handsets.Alternatively, the user can also change operators while retaining the handsetsimply by changing the SIM. Some operators will block this by allowing thephone to use only a single SIM, or only a SIM issued by them; this practiceis known as SIM locking, and is illegal in some countriesTENTATIVE MODEL TO BE EMPLOYED XVII
  18. 18. MAIN CIRCUIT DIAGRAM XVIII
  19. 19. XIX
  20. 20. XX
  21. 21. PRORAMMERThe programmer used is a powerful programmer for the Atmel 89 series ofmicrocontrollers that includes 89C51/52/55, 89S51/52/55 and many more. Itis simple to use & low cost, yet powerful flash microcontroller programmerfor the Atmel 89 series. It will Program, Read and Verify Code Data, WriteLock Bits, Erase and Blank Check. All fuse and lock bits are programmable.This programmer has intelligent onboard firmware and connects to the serialport. It can be used with any type of computer and requires no specialhardware. All that is needed is a USB communication port. All devices alsohave a number of lock bits to provide various levels of software andprogramming protection. These lock bits are fully programmable using thisprogrammer. Locks bits are useful to protect the program to be read backfrom microcontroller only allowing erase to reprogram the microcontroller.Major parts of this programmer are USB Port, Power Supply and Firmwaremicrocontroller. Serial data is sent and received to this programmer throughthe USB connector. Most today’s computer has a USB connector. All theprogramming ‘intelligence’ is built into the programmer so no need of anyspecial hardware to run it. Programmer comes with window based softwarefor easy programming of the devices. XXI
  22. 22. CONCLUSIONThe prototype of the GSM based display electronic notice board can beefficiently designed. This prototype has facilities to be integrated with adisplay board thus making it truly mobile. The toolkit accepts the SMS,stores it, validates it and then displays it in the LCD module. The SMS isdeleted from the phone each time it is read, thus making room for the nextSMS. The major constraints incorporated are the use of ‘*’ as thetermination character of the SMS and the display of one SMS as at a time.These limitations can be removed by the use of higher end microcontrollersand extended RAM. The prototype can be implemented using commercialdisplay boards. In this case, it can solve the problem of instant informationtransfer in this campus(SHARADA UNIVERSITY). XXII
  23. 23. CONCLUSIONThe prototype of the GSM based display electronic notice board can beefficiently designed. This prototype has facilities to be integrated with adisplay board thus making it truly mobile. The toolkit accepts the SMS,stores it, validates it and then displays it in the LCD module. The SMS isdeleted from the phone each time it is read, thus making room for the nextSMS. The major constraints incorporated are the use of ‘*’ as thetermination character of the SMS and the display of one SMS as at a time.These limitations can be removed by the use of higher end microcontrollersand extended RAM. The prototype can be implemented using commercialdisplay boards. In this case, it can solve the problem of instant informationtransfer in this campus(SHARADA UNIVERSITY). XXII

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