6. RFID BASED SMART SHOPPING TROLLY

When making a purchase at a supermarket, we can choose the things we want, put them in the cont ainer, and only learn the final price when the bill is sent.Additionally, we must wait in queue to bill such things. To get around this, we can create an RFID based trolley to make purchases simpler and more pleasant. To make the transaction more comfortable, the trolley is equipped with an RFID Reader and an electrical hardware .Each item has an RFID card attached, and the card's price is pre- programmed. The cost of the item is added to the purchase bill and is displayed on the receipt when it is displayed to the reader (fitted in the cart). The option to remove products from the trolley after deducting their costs from the overall cost also included. The microcontroller allows us to establish a limit value for the purchase price; after the products are added, the cost is totaled, and if it exceeds a predetermined threshold, an alert signal is sent to let us know. A payment option is also made available to the customer along with this.The customer can pay their bill with ease by choosing a pa yment method. MCU sends data through SMS to the customer's side via the GSM module that shows the total amount paid for the transaction .