TOOL FOR AUTOMATICALLY CHECKING ATTENDANCE OF STUDENT IN CLASSROOM

摘要

We design and use a software tool capable of automatically checking the attendance of an enrolled student by using a smartphone. The student needs to install the application on his/her smartphone. The challenging issue of the software tool is that we need to automatically find out if a student is inside or outside the classroom. For this purpose, the application of the smartphone of the student will measure the current signal strength of Wi-Fi and Bluetooth devices near the classroom. The measurement results are reported to a server running software to check the attendance of the student. The server can analyze the signal strengths to determine whether the student is inside or outside the classroom. A comprehensive measurement of the strength of WiFi and Bluetooth signals shows that WiFi scanning of the smartphone consumes more energy than BLE scanning. Also, the received signal of a Wi-Fi beacon can change dynamically due to interference and fading. In other words, we are not able to find out the location of the student in the classroom by the strength of the Wi-Fi signal. If we can place a Bluetooth device, we can adjust a transmission power level. This helps to improve the accuracy of the location measurement of the student. By leveraging the Bluetooth device, we are able to perform highly advanced location measurement.;COPYRIGHT KIPO 2017