How RFID Card/Tag Memory System Works | MFRC522 | ESP32 | 13.5 Mhz RFID Card | RoboXpert.

In this video, I’ll explain *how the memory system of an RFID card or tag works* — using the *MFRC522 module* with the *ESP32* at *13.56 MHz* . 💳⚡

You’ll learn how data is stored inside an RFID card, how memory blocks and sectors are arranged, and how you can use them to *read, write, and manage personal data* like name, ID, or phone number directly from your ESP32.

🔹 *What You’ll Learn:*

* How RFID cards communicate at 13.56 MHz
* Understanding *MIFARE 1K memory layout* (sectors, blocks, and data bytes)
* Difference between data blocks and sector trailers
* What happens when you overwrite a block (and how to avoid locking your card)
* How the MFRC522 RFID reader interacts with these memory blocks
* How to safely read & write using the *Arduino_MFRC522v2 library* in Arduino IDE

📘 *Hardware Used:*

* ESP32 Development Board
* MFRC522 RFID Reader Module
* 13.56 MHz RFID Card & Keychain Tag
* Jumper Wires & Breadboard

🔧 *Software:*

* Arduino IDE
* Arduino_MFRC522v2 Library

This video is perfect for students, hobbyists, and engineers learning about *RFID memory architecture* and *data handling* using microcontrollers.

If you enjoyed this explanation and want to see practical projects like *RFID Smart ID Card* , *RFID Attendance System* , and *ESP32-based IoT Projects* , make sure to *subscribe to [@Roboxpert](https://www.youtube.com/@Roboxpert)* and hit the 🔔 bell icon for upcoming tutorials!

#ESP32 #RFID #MFRC522 #IoT #Roboxpert #TechnolabElectronics #ElectronicsProjects #Arduino #RFIDCard #SmartIDCard #RFIDMemory #EmbeddedSystems #IoTProjects #DIYElectronics

Видео How RFID Card/Tag Memory System Works | MFRC522 | ESP32 | 13.5 Mhz RFID Card | RoboXpert. канала RoboXpert