<![CDATA[The door security system using RFID is one of the many systems that can be used to increase the level of security on the doors of houses, classrooms, warehouses and so on. The door security system uses RFID as a medium to read or identify so that the door can open. It uses a relay as a link and breaker of electric current that is flowed to the load (Solenoid Door Lock). It uses LCD as a notification whether RFID successfully identifies what not. When RFID identifies the card and the condition of the card that the RFID reads successfully then the LCD will pop up the text "WELCOME LAB IOT" and the Solenoid will open. After a few seconds then the solenoid will lock again. Conversely, When RFID identifies the card and the condition of the card read RFID is not successfully detected then the LCD will pop up the text "PLEASE TRY AGAIN" and the Solenoid will remain locked. If during the RFID card reading process there is a failure 3 times, the Buzzer will sound and the LCD will display the text "YOU ARE NOT REGISTERED".]]>
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