| dc.description.abstract | Buying and selling transactions are common in our lives. However, due to lack of supervision, many buyers buy products that do not meet the buyer's criteria. To reduce sales of non-conforming products to buyers, we need a system that can monitor buyers in product selection. One control system that handles this is a microcontroller. In this system, the microcontroller used is Arduino uno. The Arduino uno microcontroller is used to classify buyers using E-KTP data. This system will determine the buyer's balance and type of drink. From the results of this study, it can be concluded that by using the ID E-KTP input, product purchases can only be made according to the buyer's criteria. With the database system contained in the Arduino system, product purchases can be made according to the balance, type of product. In testing the whole system above, it can be concluded that E-KTP 1 or ID with a balance of 100,000 is a product purchase process for example fanta drinks, buzzer off, display on the LCD "purchase process was successful" as well as the next purchase process. From the table of overall system test results above, it can be concluded that E-Ktp 4 or id with a balance of 15,000 is the process of purchasing products. for example Coca-cola drinks, buzzer on, display on the LCD "purchase process cancelled" as well as the next purchase process. | en_US |
