required help regarding my main project

[ROOP SARATH CHANDRA MANDAPATI]

hi
 

       i am an student , i  doing main  project  on  RFID based payment system using GSM network , 

 

The payment system is completed in three steps namely:

 

1. Identification

2. Authentication

3. Database access and updates

 

ThePayment terminal has an LCD to show the current date and time and prompt you to enter your desired payment amount. When we enter amount, then LCD displays to please wave tag. When we wave RFID tag near RFID car reader, RFID tags are activated and the information on the tag is captured by the reader which sends it to the microcontroller for decryption. The microcontroller under use is AT89C51. Next, the user is prompted to enter the security code. To make the system quick and convenient, a 4-digit security pin is used for Authentication. In the third step, data is transferred between the user and the database which is conceived via air using GSM module for communication. mySQL is used here for server database management. In the database user information for particular RFID card & a 4-digit security pin is used for Authentication are verified & again details are send back & displayed on LCD. If given input matches with database information then on LCD payment is success will be displayed otherwise it asks again to enter the details.

 

I need to know how to interface RFID module,  lcd 16×2,  keypad 4×4, GSM module ( sim 300 )  all this at  a time to  AT89C51 ( 8051 ic) . I need  circuit diagram for interfacing all of them,

 

 

I also want know how the database access & updates is done using  gsm module sim 300

 

Any help on the above matter will be highly appreciated,

Thank You

 

 

 

 

 

 

 

 

 

 

 

 

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