Class attendance checking is essential to teachers and students to record the number of attended and missed classes for later assessment. The previous attendance checking system was built on a wireless router, a webcam, and an RFID reader. When a student touches the RFID reader with his/her ID card, the webcam will take a picture and transfer it to the server. However, pictures are often not clear enough for identifying students, and manually recording students who forget their cards are inconvenient. This project aims to solve these problems by implementing the system on a tablet which will be installed near the classroom entrance. When students arrive, they will touch their ID cards and take photos while seeing their faces on the screen. The tablet will save the data and send them to the server via a wireless network. In case the network connection is not available, the tablet will store the data in the local database until the connection is restored. This project is developed for the Android operating system and uses an external RFID reader for reading student cards. Attendance summary will be displayed on a website in a tabular form. The system has already been tested in classrooms of 60 students in the Department of Computer Engineering, Kasetsart University. Comparing with the previous attendance checking system, the new one has clear and complete component 100 percent but the previous has only 80 percent.
