<h1>RFID Modules: The Backbone of Modern Identification Systems</h1> <p>RFID modules have fundamentally transformed how I approach inventory management and access control in my projects. From personal tinkering to professional implementations, the journey of integrating these compact powerhouses has been nothing short of fascinating. My initial foray was a simple door lock system, which quickly revealed the immense potential locked within these unassuming devices.</p> <h2>Unpacking the Core Technology: A Technical Deep Dive</h2> <p>To truly leverage <strong>RFID modules</strong>, understanding their technical soul is crucial. Here is a detailed breakdown of common specifications for a typical high-frequency (13.56 MHz) module. *Please note: The following technical parameters are for reference data; specifics need to be confirmed by contacting backend management.*</p> <h3>Detailed Technical Parameters & Specifications</h3> <h4>Physical & Interface Specifications</h4> <ul> <li><strong>Operating Frequency:</strong> 13.56 MHz (ISO/IEC 14443 A & B, ISO15693 standards)</li> <li><strong>Communication Interface:</strong> UART (TTL level, 3.3V/5V), I2C, SPI, USB, Wiegand 26/34</li> <li><strong>Supply Voltage (VCC):</strong> 3.3V DC ±0.3V or 5.0V DC ±0.5V</li> <li><strong>Current Consumption:</strong> Standby: < 50µA; Working: ~80mA (peak)</li> <li><strong>Operating Range:</strong> Typically 0 ~ 100mm (dependent on antenna design and tag type)</li> <li><strong>Module Dimensions (LxWxH):</strong> 40.0mm x 60.0mm x 10.5mm (standard board size)</li> <li><strong>Antenna:</strong> Integrated PCB antenna, typically 50mm x 50mm square coil.</li> </ul> <h4>Chipset & Processing Core</h4> <ul> <li><strong>Main Control Chip:</strong> NXP MFRC522, MFRC523, or STMicroelectronics CR95HF.</li> <li><strong>Chip Code / Part Number:</strong> e.g., MFRC52201HN1,951 for the NXP variant.</li> <li><strong>Supported Tag Types:</strong> Mifare S50, S70, UltraLight, Pro, DESFire; NTAG21x series.</li> <li><strong>Data Transmission Rate:</strong> Up to 848 kbps.</li> <li><strong>Internal Memory:</strong> On-chip SRAM for data buffering; firmware stored in external SPI Flash or internal ROM.</li> </ul> <h2>From Concept to Reality: Personal Applications & Skills</h2> <p>My skill in embedded systems found a perfect partner in <strong>RFID