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#include <MFRC522.h> // Sử dụng thư viện MFRC522 để đọc thẻ RFID #include <LiquidCrystal_I2C.h> // Sử dụng thư viện LiquidCrystal_I2C để điều khiển màn hình LCD qua giao tiếp I2C #include <Keypad.h> / ...

#include <RTClib.h> // Thư viện xử lý thời gian thực cho module DS1307 hoặc DS3231 #include <SPI.h> // Thư viện giao tiếp chuẩn SPI (dùng cho module RFID) #include <MFRC522.h> // Thư viện điều khiển ...