GSM Based Campus Display system
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The document details a GSM-based campus display system developed by students, which utilizes a microcontroller (AT89S52) to receive SMS messages from authorized mobile phones and display information on LCD screens across a campus. The system is designed for easy expansion and can serve as an electronic notice board, offering quick updates to students and staff. Future enhancements may include multilingual displays, graphical interfaces, and broader applications in public places.
GSM Based Campus Display system
- 1. “ GSM Based Campus Display System ” Prepared by, KASHYAP SHAH (090300111022) PRAGNESH GAJJAR (090300111086) YUVRAJ RATHOD (090300111114) Guided by, Prof. Dilip H. Patel ( Internal guide ) Electronics & Communication Engineering Department L.D.R.P Institute of Technology & Research, Gandhinagar
- 2. GSM BASED CAMPUS DISPLAY SYSTEM using Microcontroller AT89S52
- 3. : Presentation Outline : Introduction Design Overview How it works ? Demo Components Used AT Commands , Control codes Applications & usages Future scope References
- 4. Introduction Communication technology over the years Wired and Wireless communication- Comparison Need of HMI ( Human Machine Interface ) GSM Technology GSM Based Campus display system at a glance
- 6. How it works ? The CDS mainly consists of a GSM receiver and a display toolkit which can be programmed from an authorized mobile phone. It receives the SMS, validates the sending Mobile Identification Number (MIN) and displays the desired information after necessary code conversion. It can serve as an electronic notice board and display the important notices instantaneously thus avoiding the latency. Being wireless, the GSM based CDS is easy to expand and allows the user to add more display units at anytime and at any location in the campus depending on the requirement of the institute.
- 8. DEMO - HOW IT LOOKS LIKE ? LCD 01: LDRP-ITR Department WELCOME TO LDRP-ITR Message Code: 0101* MID SEM EXAM FROM DD-MM-YY Message Code: 0102* Here „ * ‟ works as a termination character for SMS.
- 9. DEMO - HOW IT LOOKS LIKE ? LCD 02: VPMP Department Message Code: 0201* Message Code: 0202* Here „ * ‟ works as a termination character for SMS. WELCOME TO VPMP ROBOTICS WORKSHOP ANNOUNCEMENT
- 10. DEMO - HOW IT LOOKS LIKE ? Message Code: 0302*Message Code: 0301* LCD 03: ADMIN Department Here „ * ‟ works as a termination character for SMS. PAY YOUR FEES BY DD-MM-YY COLLECT YOUR 6TH SEM MARKSHEETS
- 11. DEMO - HOW IT LOOKS LIKE ? BROADCAST – All LCD displays the same message KSV UNIVERSITY WELCOMES YOU ALL TOMORROW IS A HOLIDAY Default Message Message Code: 0001* Here „ * ‟ works as a termination character for SMS.
- 12. SCHEMATIC DIAGRAM OF INTERFACING
- 13. COMPONENTS USED Microcontroller AT89S52 microcontroller- a variant of 8052. 8-bit microcontroller with 8KB on-chip Flash memory, 256 bytes RAM, three timer/counters, one serial and four 8-bit parallel ports. It can also address up to 64KB of external data memory RAM and program memory. AT89S52 ( Atmel )
- 14. COMPONENTS USED LCD HD44780 LCD for displaying the text data 16 character x 2 line display module ( But in practice, it should be replace by the large multiline, multi- color commercial display units ) HD44780 LCD
- 15. COMPONENTS USED MAX 232 IC MAXIM 232- that converts signals from an RS-232 serial port to signals suitable for use in TTL compatible digital logic circuits. The MAX232 is a dual driver/receiver and typically converts the RX, TX CTS and RTS signals. It changes a TTL Logic 0 to between +3 and +15 V, and changes TTL Logic 1 to between -3 to -15 V, and vice versa for converting from RS232 to TTL. MAX232 IC
- 16. COMPONENTS USED GSM Modem SIM 300 GSM Modem – Fixed Cellular Terminal for data applications. compact & portable, easy to set up. A wired connection at one end with the help of RS232C serial port and wireless at the other. features like SMS receiving, call receiving.
- 17. COMPONENTS USED Computers use AT commands to control modems. Both GSM modems and dial-up modems support a common set of standard AT commands. GSM modem can be used just like a dial-up modem. In addition to the standard AT commands, GSM modems support an extended set of AT commands. These extended AT commands are predefined in the GSM. Computer Interface Finally, this project uses RS232 serial interface for interfacing the GSM modem with a PC. This interface is used to setup the GSM modem.
- 18. AT COMMANDS AT commands are used to control MODEMs. AT is the abbreviation for Attention. These commands come from Hayes commands that were used by the Hayes smart modems.
- 19. LIST OF IMP AT COMMANDS Call control : Data card Control : Command Description AT To check communication between computer and module. ATD Dial Command AT+CBC Battery charge AT+CPAS Phone activity status AT+CMGR AT+CMGS Read message Send message AT+CLIP Calling line identification presentation AT+CMGF Message format
- 20. Call control : Data card Control : SMS Text mode : The controller is programmed to send a fixed command „AT‟ to the module. The command AT is used to check the communication with module. It returns a result code OK if the module and the controller are connected properly. If either of the module or SIM are not working, it returns a result code ERROR. INTERFACING AT COMMANDS
- 21. CONTROL CODES FOR LCD
- 22. APPLICATIONS & USAGES The Campus Display System is aimed at the colleges and universities for displaying day-to-day information continuously or at regular intervals during working hours. Display devices can be setup at various places in the campus. Being GSM-based system, it offers flexibility to display flash news or announcements faster than a programmable system. GSM-based campus display system can also be used at other public places like schools, hospitals, railway stations, gardens etc. without affecting the surrounding environment.
- 23. FUTURE SCOPE Multiple receiver MODEMS at the different positions in a geographical area carrying duplicate (cloned) SIM Cards. Multilingual display Graphical Display Use of MMS technology
- 24. 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