#define SS_PIN D8 // Slave Select (SS) pin for MFRC522 #define RST_PIN D3 // Reset pin for MFRC522 ...

This project implements an RFID-based attendance system using the ESP8266 Wi-Fi module. The system reads RFID tags using an MFRC522 reader, logs check-in and check-out times, and displays attendance ...

So it's understandable that you want to protect yourself every chance you get. RFID (radio-frequency identification) is used in many credit cards to allow for contactless payment. Instead of swiping ...

Have you ever wondered how speed guns measure the speed of moving vehicles or how an athlete's sprint speed is recorded… ...