468.IoT Based RFID Attendance System Using Arduino ESP8266 & Adafruit.io In this project, you will learn how to make an Internet of Things (IoT)- based RFID attendance system using Arduino Node MCU ESP8266

Arduino and Adafruit.io Platform using the MQTT broker. Consequently, we will be utilizing an RFID MFRC522 along with an Arduino Nano and a Node MCU ESP-12E Board. The RFID cards are scanned by an Arduino and RFID scanner, and the data from those scans is then uploaded to the Adafruit IO cloud platform with the assistance of an ESP8266 Wi-Fi module. This data may be presented in the Adafruit IO dashboard and may be retrieved by the appropriate authorities to view and evaluate the attendance over the internet at any time and from any location. So let's get started.

NodeMCU - ESP8266 Arduino Board - Arduino UNO/Nano or any other Board RFID Module - MFRC522 RFID SPI Module RFID Cards - 13.56 Mhz RFID Cards Connecting Wires Breadboard Circuit Diagram & Connections

MFRC522 RFID, an Arduino Nano, and a NodeMCU Board are all that are required. Therefore, the connection diagram is precisely the same as what is depicted in the figure. Join the SDA pin of the RFID to the 10th digital pin of the Arduino. Similarly Connect the RST pin to D9 and the SCK pin to D13. Connect MOSI to D11 and MISO to D12. Connect GND to GND. Supply 3.3V power using the 3.3V Pins. There is a disconnect in the IRQ. In a similar fashion, connect the TX and RX pins on the NodeMCU to the D2 and D3 pins on the Arduino. Connecting the Node MCU's VCC and GND Pins will also allow you to supply it with power. Hardware Setup So, this is the full configuration of our hardware. In this location, we have the Arduino Nano, the Nodemcu board, and the MFRC522 RFID scanner. On a breadboard, all of the connections are made in accordance with the circuit diagram. An SPI Module known as MFRC522 is connected to an Arduino. The Nodemcu is linked through the use of the UART pins. There are only a limited number of RFID cards available, and each person can

only have one. The frequency of these cards is 13.56 megahertz across the board. Setting up an Adafruit.io account: Adafruit.io is an open data platform that lets you collect, visualize, and analyze live data in the cloud. You can enable internet of things functionality in your project by utilizing Adafruit.io, which allows you to upload, display, and monitor your data over the internet. Signing up for Adafruit is the first step in setting up your Adafruit account, so make sure to do that right away. To sign up for Adafruit IO, go to their website at https://io.adafruit.com/ and click on the button that says "Get started for Free" in the top right corner of the screen. Following this, a window will appear for you to fill in with your personal information. Simply return to the https://io.adafruit.com/ URL once the account has been successfully created. To view the AIO key, select it from the menu on the left. You are going to need to copy the username and the AIO Key from this location. Therefore, make a simple copy of these keys on notepad, as you will require them in the future to use in the program. Now, on the left-hand side, click on the dashboard, and then create a new dashboard by giving it any name you like, such as RFID Attendance. You are under no obligation to provide a description. Therefore, the dashboard is being constructed. Now proceed in the same manner by going to feeds and creating a new feed. You need to give it a name. Also, copy this name that you have given it, as we will also require this at a later time. You can do so by writing it down in the notepad. Results

After the code has been uploaded to both of the boards, you can quickly begin scanning the RFID Cards by simply opening the serial monitor on both of the boards.

The data are uploaded to adafruit io feeds whether a few or many cards are scanned at the same time. You need only sign in to review the information in question.