Smart shelves, the electronically connected shelves which can automatically monitor the shelf of the inventory in a retail establishment is one of the most feasible solutions to address the out of stock items in physical stores A smart shelf is a shelf in a store that has been equipped with the ultrasonic sensors, a device that can measure the distance between the shelf and the product by using sound waves and the level of stock can be viewed in retailer application. A microprocessor is installed on the shelf for data processing Android applications for supplier and retailer are developed. Using this android application notifications are sent or received from microcontroller. Automatic replenishment alert is one of the most potential uses of smart shelves in the retail business area. The smart shelf notices when it's running out of an item and sends an alert to the back-end system. Depending on the system application of the store, the alert is either sent to the backroom or to a mobile computer, so that sales personnel can replenish the shelf or make order for more items.
Key words: Ultrasonic sensor, LCD display Arduino Uno, Monitoring stock, Android Application.
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