“…The data was stored in Secure Digital (SD), and instructions for adding new fingerprints and removing old ones were written in C++. Through the utilization of the information that is stored in the Secure Digital (SD) drive, it is possible to maintain a record of the real-time clock-in hours of the employees [15]. The components that comprised the system were as follows: an electric plate, an Arduino, a biometric sensor, pushbuttons, a 16x2 LCD screen, a relay, a real-time clock, and internal memory of the device.…”