RFID Not Detected: Check connections between the RFID module and Arduino. Ensure correct wiring of SCK, MISO, MOSI, and SDA pins. Incorrect UID: Ensure the RFID card's UID matches the one stored in ...

This project implements an RFID-based attendance system using NodeMCU ESP8266, MFRC522 RFID module, and a 5V buzzer. The system allows users to tap RFID cards to record attendance, which is then sent ...

Meet the Arduino Compatible RFID Reader Module. It can hold card data for up to five cards, takes seconds to program, and holds card data in EEPROM memory, which means that the cards are saved ...

The DF2301QG offline voice recognition module is shown connected to an Arduino clone over I2C board, but it could support any other hardware with UART or I2C including other Arduino boards, Raspberry ...