The electronic identity card authentication system device module for smart classroom access is the initial stage of the smart class concept system development. This authentication system is the basic stage of smart class service access infrastructure using Near Field Communication (NFC) technology base using the Mafire Classic 4K Byte card. The device module consists of an Electronic Identity Card Reader module developed using the Java programming language that runs on the Raspbian pi operating system platform with the Raspberry pi 3B + engine.