Electronic Notice Board Controlled By SMS

Electronic Notice Board Controlled By SMS Using 8051 Microcontroller

Electronic Notice Board Controlled By GSM

We know that notice boards is primary thing in public places like railway stations, bus stations and airportsHotels, Malls, college, offices and can be used anywhere, even at home.an a separate person is required to take care of this notices display as notices need to be change on day to day basis also it is difficult task required more human efforts.

So to solve this problem here we are introducingElectronic notice board controlled by GSM in this system we can display a message or notice with a simple, fast and reliable wayto some display device like LCD, and this message can be easily set or changed from anywhere in the world, just by using the SMS facility of your mobile handset. Whatever notice we want to display, just send the SMS of that text, it is received and retrieved by the GSM modem at the display unit. It is then sent to the microcontroller that further displays the notice sent from the user on to the electronic notice board which is equipped with a LCD display.

Block diagram:

In this project AT89S52 microcontroller is used for controlling the whole process, GSM module (to receive the SMS/message sent from mobile phone and LCD to display the message. the message can be sent through an android application designed in this project, to the GSM module which has a SIM card inside it.Message is need to be send with some suffix and prefix like#Circuit Digest*, #We Welcomes You*through the SMS. Here we have used a prefix in the message string that is ‘#’. This prefix is used to identify the starting of the message or notice. And ‘*’ is used as suffix to indicate the end of the message or notice.

 When we send SMS from mobile phone to GSM module then GSM receives that SMS and sends it to microcontroller. Now microcontroller read this SMS and extract main notice message from the received string and stores in another string.  And then sends the extracted message to 16x2 LCD by using appropriate commands.The device can be used anywhere irrespective of the place of deployment provided mobile network connectivity is available.

Hardware Requirements:

·        8051 Microcontroller (AT89C51)

·        GSM MODEM (GSM Module)

·        SIM Card (for inserting in GSM Modem)

·        A mobile phone with a SIM Card already inserted

·        16 x 2 LCD Display

·        Power Supply

Software Requirements:

·      MC programming language: Embedded C

·      Keil  version IDE

·       Proteus For Circuit & PCB Design