Vikaspptonnoticeboard
- 1. KIET GROUPS OF INSTITUTION Under the guidance of Prof. Ruchika Singh Presented by: Vikas Kr. Singh - 1402921180 GSM Based Wireless Notice Board Main project report on
- 2. CONTENTS Aim of the project Introduction Block Diagram GSM Modem AT commands Max 232 LED Display Features of LPC 2148 Flow Chart Advantages Disadvantages Conclusion Future scope
- 3. AIM OF THE PROJECT Notice Board is primary thing in any institution or organization or public utility places like bus stations, railway stations and parks. But sticking various notices day-to-day is a difficult process.
- 4. INTRODUCTION 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. SIM900 GSM modem with a SIM card is interfaced to the ports of the microcontroller with the help of AT commands. SIM900 is duly interfaced through a level shifter IC MAX232 to the microcontroller. The messaged is thus fetched into the microcontroller. It is further displayed on an electronic notice board which equipped with LED display interfaced to microprocessor powered by a regulated power supply from mains supply of 230 volts ac.
- 6. GSM Modem GSM modem is the Data Communicating Equipment which is connected to terminal equipment for data transmission and reception. GSM stands for Global System for Mobile Communication SIM stands for Subscriber identity Module GSM modem is controlled using AT commands AT stands for Attention Ex- AT, AT+CMGR, AT+CMGS, AT+CMGD etc.
- 8. AT Commands & Corresponding Operation AT Commands Description AT To check if Modem is connected properly ATE0 To turn echo off ATE1 To turn echo on AT+CMGF Set operating Mode
- 9. AT Commands & Corresponding Operation AT Commands Description AT+CMGD= <index>, <delflag> To delete a message AT+CMGR= <index> To read message from an index AT+CMGS= “contact no.” , TP-type address To send message to specified contact no.
- 10. MAX 232
- 11. MAX 232 IC MAX 232 that converts signals from an RS-232 serial port to signals suitable for use in TTL compatible digital logic circuits. The MAX 232 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 - 15V, and vice versa for converting from RS232 to TTL.
- 12. User wants to display a message in the led board User sends the message from his mobile defining the message in the code format and then to the number of the subscriber identity module (SIM) which is inserted in the display system MODEM. LED DISPLAY
- 13. ARM7
- 14. ARM7 ARM: Advanced RISC Machine Founded in1990, owned by Acorn, Apple and VLSI Most widely used 32-bit instruction set architecture Suitable for low power devices Used extensively in consumer electronics, PDA (Personal Digital Assistant), mobile phones, computer peripherals (hard drives & routers), music players, game consoles, calculators, etc.,
- 15. 8 kb to 40 kb of on-chip static RAM and 32 kB to 512 kB of on- chip flash memory. 128-bit wide interface/accelerator enables high-speed 60 MHz operation Operating voltage range of 3.0 V to 3.6 V Single 10-bit D/A converter provides variable analog output. Two 32-bit timers/external event counters
- 16. FLOW CHART
- 17. ADVANTAGES Using GSM mobile we can send message to any distant locations , from any part of the World As it's a GSM wireless transmission system it has very less errors and needs less maintenance Prevents unauthorized access of notice board (password) Multiple Users are authorized to update notices on the electronic notice board No printing and photocopying costs. Thus saves time, Energy and finally environment
- 18. DISADVANTAGES When there is network problem GSM doesn’t work We failed to messages based on it’s priority. We can’t display the messages on LCD screen.
- 19. APPLICATIONS Educational institutions & organizations Managing traffic Advertisement Conference hall Bus/Railway station Any Public utility places
- 20. CONCLUSION We can use this Project in college Notice Board, a Professor can send message for the immediate gathering of students at department. It can be used on Highways for traffic control, like traffic on one side of the road may be blocked in view of VVIP movement or jam ahead
- 21. FUTURE SCOPE Temperature and time (RTC ) display during periods when no messages are to be displayed GSM based home security system, GSM based robot control, GSM based DC motor controller, GSM based stepper motor controller, GSM based voting machine control et