Implementation of HTTP Protocol in Internet of Things (IoT) Based Attendance System using RFID and Raspberry Pi
Abstract
The development of the Internet of Things (IoT) can be leveraged to improve the efficiency of employee attendance recording. This research aims to implement the HTTP protocol in an IoT-based employee attendance system using RFID and a Raspberry Pi. The system integrates a Raspberry Pi, RFID, a PIR sensor, an ultrasonic sensor, an LCD, a server, a database, and a Flutter-based attendance application. The PIR sensor is used to detect the presence of a user, while the ultrasonic sensor acts as a proximity threshold for the RFID reading process. If the user is within a distance of ≤10 cm, the RFID reading process can take place; conversely, at a distance of >10 cm, the RFID reader remains inactive, and the LCD displays no information. RFID is used to scan employee ID cards; the data is then processed by the Raspberry Pi and transmitted to a server via the HTTP protocol. Testing results demonstrate that the system is capable of reading registered RFID tags, detecting user presence, and managing attendance data. The application can display employee information and attendance statuses—such as present, absent, on leave, late, or on sick leave. Data for both clock-in and clock-out times can be stored and viewed within the application. Overall, the system provides an integrated approach to attendance recording, spanning from the initial RFID scan to final data storage.
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