Wireless

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  • Topic: Microcontroller, Wireless, RS-232
  • Pages : 5 (1634 words )
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  • Published : January 7, 2013
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Wireless GSM Based Electronic Notice Board
Mrs. S.P.Gaikwad , Manikeshwari Shahdeo , Meghna Priya , Prashant Kr. Raghav Department Of Electronics Bharati Vidyapeeth College Of Engineering , Pune India shilpapgaikwad@gmail.com maanimagic@gmail.com meghna.aquarious@gmail.com lucky_prashant90@yahoo.com

Abstract- GSM based electronic notice display system is presented in this paper, this is the model for displaying notices in college on electronic notice board by sending messages in form of SMS through mobile, it is a wireless transmission system which has very less errors and maintenance. The hardware board contains microcontroller 89c51 at the heart of the system. The microcontroller is interfaced with PC via MAX232 level convertor. It is used to convert RS232 voltage levels to TTL voltage levels and vice versa. We use PC's serial port to interface microcontroller. The hardware also has a 64K EEPROM chip AT24C64. This EEPROM is used to store the timings and messages to be displayed. Hardware also contains a real time clock DS1307 to maintain track of time. Both these ICs are interfaced with microcontroller using I2C interface. The keypad is used to set/reset parameters directly. A 4x4 keypad is attached using Row Column configuration. A 16x2 Character LCD display is attached in byte mode to port 1 of microcontroller. This display will be used to display the messages / advertisements. Microcontroller coding will be done using Embedded C and Kiel. PC Coding will be done using VB. Nokia PC Connectivity SDK is a tool used in VB for GSM Modem interfacing, this project implementation will save time, also cost efficient. a single person can handle all the work with just a message. We can use a PC with administrator for ease of message sending and keeping records.

technologies will eventually become more widespread than the various wired solutions. The wireless communications present the ideal solution for the home network .This increasing demand of getting wireless can be seen not only in the field communication but also in the transferring information and data. The cell phones which are the best example of wireless data and voice transfer can be used for many other purposes that can replace the traditional system. One simple way of using this wireless communication is to use a simple cell phone for sending messages. Our administrator uses a simple GSM based handset for sending messages to different display stations which are located far away from him. The GSM modem used at the receiver end is used to receive the messages and LCD to display them. As we are using mobile for sending messages, its easy to handle and operate. As it’ a wireless transmission the system s has very less errors and maintenance. With greater efficiency we can display the messages at various places like public transports, crowded cities and advertisement of chain restaurants. We can use this displaying system at distant area where our wire or manpower can go easily.GSM and GPRS based designs have developed another innovative and Public Utility Product for mass communication. This is a Wireless Scrolling Message Electronic Display Board, which displays the messages, received as SMS or GPRS Packets.

II.

BLOCK DIAGRAM DESCRIPTION

I.

INTRODUCTION

Market research analysts are predicting that the wireless

The hardware board contains microcontroller 89c51 at the heart of the system. The microcontroller is interfaced with PC via MAX232 level convertor. It is used to convert RS232 voltage to TTL voltage levels and vice versa. We use PC's serial port to interface microcontroller. The hardware also has a 64K EEPROM chip AT24C64. This EEPROM is used

to store the timings and messages to be displayed. Hardware also contains a real time clock DS1307 to maintain track of time. Both these ICs are interfaced with microcontroller using I2C interface. The keypad is used to set/reset parameters directly. A 4x4 keypad is attached using Row Column...
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