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Mini project-report

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Sample mini project report

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Mini project-report

  1. 1. MINI PROJECT REPORT On SYNOPSIS OF GSM BASED ELECTRONIC NOTICE BOARD SUBMITTED BY: BTech ECE 4th Year --------------------------------------------------------------------------------------------------- Department of Electronics and Communication Engineering Hindustan Institute of Technology 32, 34, Knowledge Park-III, Greater Noida, U.P TABLE OF CONTENTS I
  2. 2. 1. Acknowledgement 2. Introduction 3. Methodology 4. Scope of Work 5. Aims of GSM electronics board 6. Objectives of the GSM electronics board 7. Theoretical Background 8. GSM architecture 9. GSM frequencies 10.Main Cellular Standards 11.Literature Review 12.Network Structure 13.Subscriber Identity Module(SIM) 14.Tentative model to be employed 15.Main Circuit Diagram 16.Programmer 17.Conclusion II
  3. 3. INTRODUCTION GSM and GPRS based Designs have developed another innovative and Public utility product for mass communication . This is a Scrolling (Moving) Message Electronic Display Board which displays the messages received as SMS or GPRS Packets. Such Displays can be kept at different parts of the city and the messages like Advertisements, News. Public can send flash information from Mobiles or PCs to these displays for instant viewing. These displays are designed to quickly display large amounts of information in the liquid crystal display. Wireless communication has announced its arrival on big stage and the world is going mobile . We want to control everything and without moving an inch. This remote control electronic notice board is possible through Embedded Systems. The use of “Embedded System in Communication” has given rise to many interesting applications that ensures comfort and safety to human life. The main aim of the project will be to design a SMS electronic display toolkit which can replace the currently used programmable electronic display. The message to be displayed is sent through a SMS from an authorized mobile phone. The toolkit receives the SMS, validates the sending Mobile Identification Number (MIN) and displays the desired information after necessary code conversion. The system is made efficient by SIMs so that the SMS can be received by number of display boards in a locality using techniques of time division multiple access. I have improved upon the currently used programmable electronic display and tried to take advantage of the III
  4. 4. computing capabilities of microcontroller. I envision a toolkit that will not only display message but also can be used to do some mechanical work. Looking into current trend of information transfer in this campus (SHARDA UNIVERSITY), it is seen that important notice take time to be displayed on the notice boards. This latency is not expected in most of the cases and must be avoided. It is proposed to implement this project at the institute level. It is proposed to place display boards in major access points. The electronics displays which are currently used are programmable displays which need to be reprogrammed each time. This makes it inefficient for immediate information transfer, and thus the display board loses its importance. The GSM based display toolkit can be used as add-on to this display boards and make it truly wireless. The display board programs itself with the help of the incoming SMS with proper validation. Such a system proves to be helpful for immediate information transfer. The system required 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 incorporate the wireless features. The GSM modem receives the SMS. The AT commands are serially transferred to the modem through MAX232. In return the modem transmits the stored message through the wireless link. The microcontroller validates the SMS and then displays the message in the LCD display board. Various time division multiplexing techniques have been used to make the display boards functionally efficient. The microcontroller used in this case is ATMEL AT89S52 .Motorola C168 is used as the GSM modem. In this prototype model, LCD display is used for simulation purpose. The results presented in the thesis support the proper functionalities and working of the system. The timing diagram suggests the response of the modem to various AT (attention) commands. IV
  5. 5. METHODOLOGY The method used to carry out this project is the principle of serial communication in collaboration with embedded systems. This is a very good project 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 mobile and the embedded devices. System will work like when the user wants to display or update the notice board, he has to send the message in his mobile defining the messages and then the password of the system to the number of the subscriber identity module (SIM) which is inserted in the display system MODEM. Then, the MODEM connected to the display system will receive the SMS, the microcontroller inside the system is programmed in such a way that when the modem receives any message the microcontroller will read the message from serial headphone and verify for the password, if the password is correct then it will start displaying the messages in the display system. V
  6. 6. SCOPE OF WORK We will use liquid crystal display for displaying the message; We will also use GSM modem (Motorola c168) as my display interface. The LCD display is limited to display 18 characters; the reason is because we are using 16 by 2 LCD. The LCD can be replacing with larger type without any programming. I will send message from any phone irrespective of the GSM network to the modem connected to the programmable device using a password. The message will display on the liquid crystal display connected to 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 upon the banks for all their monetary transactions. To keep a proper track of such huge mass of people and their transactions this technology helps with certain degree of effectiveness.  Uses for Traffic Control : It’s known to all of us that traffic are the good servants of the people and also the major invention to help people but only if it is managed well otherwise we all know Bangalore’s traffic how ridiculous and irritating it can be. So with the use of this technology we can maintain the flow of traffic according to the needs of the people and also considering the availability of roads.  Uses for advertisement : We can make use of this technology to display the different advertisement on display panels to reach the larger number of people at a time and in the populated places like shopping malls, road sides as well as at the theaters, discos, hotels, motels, restaurants etc… about their products and features. VII
  8. 8.  Uses in Educational sector : Currently in Nigeria we are relying on the old style of displaying news by hanging bare time consuming papers on the notice board which can be replaced by remote controlled notice boards at the colleges and universities, also at the time of examination scheduling and result publishing etc.  Information purpose: It would be wiser to make a use of this technology for information purpose like news and its updates, real time reporting, live telecasting, inclusive of various information which adds to the advanced and busy life on daily basis.  Stock Exchange: The stock exchange is the hot topic nowadays. There are millions of sales of shares every hours and it is very necessary to maintain the real time services with the certain measures of reliability because it deals with the money large number of the small or bigger investors. With the help of this technology we can make it far easier and reliable.  Organizations: Every organization has large number of employees who are assigned to accomplish the various tasks and each and everything should be documented for the future reference purpose. And also their schedules work reports, leaves, presentation as well as distribution of salary etc… VIII
  9. 9. OBJECTIVES OF THE GSM ELECTRONIC NOTICE BOARD  Programming of the mobile phone with AT (Attention) command sequence  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 BACKGROUND GSM (Global System for Mobile communications: originally from GROUPE Spécial Mobile) is the most popular standard for mobile phones in the world. Its promoter, the GSM Association, estimates that 80% of the global mobile market uses the standard. GSM is used by over 3 billion people across more than 212 countries and territories . Its ubiquity makes international roaming very common between mobile phone operators enabling subscribers to use their phones in many parts of the world. GSM differs from its predecessors in that both signaling and speech channels are digital, and thus is considered a second generation (2G) mobile phone system . This has also meant that data communication was easy to build into the system X
  11. 11. GSM ARCHITECTURE GSM is a complex system and difficult to understand. The Mobile Station (MS) refers to the mobile equipment . The Base Station Subsystem controls the radio link with the Mobile Station. The Network Subsystem performs main functions such as switching of calls between mobile users, mobility management operations, and proper operation and setup of a network . These functions are controlled by the Mobile Services Switching Center (MSC). GSM FREQUENCIES GSM networks operate in a number of different frequency ranges (separated into GSM frequency ranges for 2G and UMTS frequency bands for 3G). Most 2G GSM networks operate in the 900 MHz or 1800 MHz bands. Some countries in the Americas (including Canada and the United States) use the 850 MHz and 1900 MHz bands because the 900 and 1800 MHz frequency bands were already allocated. Most 3G GSM networks in Europe operate in the 2100 MHz frequency band . XI
  12. 12. MAIN CELLULAR STANDARDS XII
  13. 13. XIII
  14. 14. LITERATURE REVIEW This project is an implementation to the idea of the wireless communication between a mobile phone and a microcontroller. Currently the main work that has been done on this proposed system is through serial port to the computer but not wireless. If they want to change the message, they have to go to the remote area with the laptop and change the message. The system has to be reprogrammed to display new messages. But in this new design, the systems need 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 the electronic board which is being made up of liquid crystal display. In the new system, when new messages enter, the old messages will be deleted. GSM was designed with a moderate level of security. The system was designed to authenticate the subscriber using a pre-shared key and challenge-response. Communications between the subscriber and the base station 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, and MAX-232 with GSM MODEM. XV
  16. 16. NETWORK STRUCTURE The network behind the GSM seen by the customer is large and complicated in 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 most similar to a fixed network). This is sometimes also just called the core network.  The GPRS Core Network (the optional part which allows packet based Internet connections).  All of the elements in the system combine to produce many GSM services 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 card containing the user's 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 handset simply by changing the SIM. Some operators will block this by allowing the phone to use only a single SIM, or only a SIM issued by them; this practice is known as SIM locking, and is illegal in some countries TENTATIVE MODEL TO BE EMPLOYED XVII
  18. 18. MAIN CIRCUIT DIAGRAM XVIII
  19. 19. XIX
  20. 20. XX
  21. 21. PRORAMMER The programmer used is a powerful programmer for the Atmel 89 series of microcontrollers that includes 89C51/52/55, 89S51/52/55 and many more. It is simple to use & low cost, yet powerful flash microcontroller programmer for the Atmel 89 series. It will Program, Read and Verify Code Data, Write Lock Bits, Erase and Blank Check. All fuse and lock bits are programmable. This programmer has intelligent onboard firmware and connects to the serial port. It can be used with any type of computer and requires no special hardware. All that is needed is a USB communication port. All devices also have a number of lock bits to provide various levels of software and programming protection. These lock bits are fully programmable using this programmer. Locks bits are useful to protect the program to be read back from microcontroller only allowing erase to reprogram the microcontroller. Major parts of this programmer are USB Port, Power Supply and Firmware microcontroller. Serial data is sent and received to this programmer through the USB connector. Most today’s computer has a USB connector. All the programming ‘intelligence’ is built into the programmer so no need of any special hardware to run it. Programmer comes with window based software for easy programming of the devices. XXI
  22. 22. CONCLUSION The prototype of the GSM based display electronic notice board can be efficiently designed. This prototype has facilities to be integrated with a display 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 is deleted from the phone each time it is read, thus making room for the next SMS. The major constraints incorporated are the use of ‘*’ as the termination 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 microcontrollers and extended RAM. The prototype can be implemented using commercial display boards. In this case, it can solve the problem of instant information transfer in this campus(SHARADA UNIVERSITY). XXII

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