Cloud-based RFID access control using lightweight messaging protocol

This article describes the development of an access control with online monitoring based on radio frequency identification (RFID) technology. Access time and date together with user tag code are sent to an online database. The entire process of identification and registration is done by a PIC microcontroller and an embedded Linux system (Raspberry Pi), that by having communication with the Internet updates a database table with the access information. The table with the data can be accessed from any computational device Internet connected. For improving the system, we implement a new version using only the Internet of Things (IoT) module ESP8266 that has a low cost and various peripherals. All information about tag actions is displayed for the user on an LCD display and each action is signaled by a specific beep.