RFID-RC522 with Excel using Arduino (As a attendance system)

Hi, everyone. In this video, I&going to show you how to interfacing RFID-RC522 with Arduino UNO and saving the information about cards in Excel file. Login system or Attendance system. For example to ensure all employees in the company come in time every day and saved the Excel file where the names and each unique number stored when all employees had come. The Excel file saves Login and Logout time. Note: The card will detect only once and show you a message if the card already detected and saved. ----------------------------------------------------------------------------------------------------------- Some guys told me that they have a problem while scanning the Cards that problem was the Arduino detect many cards as the same with the same name even these cards had different IDs. So I fixed the problem and Here&the new code, Using this code you don&have to upload another code to scan the card&ID just upload this code then open the Serial monitor and scan your tags then replace yours with the other in the code. I hope everything goes as you want. Please read the comment in the code to better understanding. Everything you need is here: ----------------------------------------------------------------------------------------------------------- If you want to use LCD 16x2 with this project and make it more interesting. You can use this code Arduino code with LCD: The diagram with the LCD driver and without it: with only 1 wire using SPI Protocol and Shift Register. The reason...