RFID based supermarket shopping system

While shopping in super market we gather items we want, put it in the trolley and at the time of billing only we come to know about the total cost. Also we need to stand in long queue for billing those items. Hence there is a need for an innovative product with the societal acceptance that will help to achieve comfort, convenience and efficiency while shopping. This paper summarizes the implementation of electronics hardware system with Radio Frequency Identification Reader fitted in the trolley to avoid long queues at the billing desk. Radio Frequency Identification tag is attached to all the products available for sale. The Liquid Crystal Display that is fixed to the trolley displays the name of scanned product, product id, cost of that product and the total bill amount. The customer can set the price limit using the 4×4 matrix keypad. If the total bill amount exceeds the price limit set using keypad then the customer will be warned by the buzzer. Once the customer has completed shopping he can press a button on the keypad to send the bill wirelessly to the master computer for paying the bill through a wireless link using RF transceiver. PIC 18F4550 microcontroller is used for implementing hardware. Eagle software is used for making Printed Circuit Board and hyper terminal is used to display final bill on the computer. Thus, the system facilitates faster billing and reduces time.