Commercial parts

·         Arduino QR scanner: scans the QR code to obtain the desirable information (10$)
·         Segment screen: displays the individuals temperature (<4$)
·         Led lights, red and green: indicates whether or not the person is allowed to enter based on his body temperature and the count of people (<1$)
·         Arduino UNO board: programmed to process the information and operating the system (23$)
·         DC rechargeable batteries: power supply (<3$)