# Raspberry Pi 4 RFID Integration Guide ## Introduction to Raspberry Pi 4 RFID Systems **Raspberry Pi 4 RFID** technology has revolutionized how we approach access control, inventory management, and interactive applications. As someone who has implemented multiple **Raspberry Pi 4 RFID** projects for both commercial and personal use, I can confidently say that this combination offers remarkable flexibility and power. My journey with **Raspberry Pi 4 RFID** began three years ago when I developed a smart library system for a local community center, and since then, I've created everything from secure door entry systems to interactive museum exhibits. ## My Personal Experience with Raspberry Pi 4 RFID Projects What surprised me most about working with **Raspberry Pi 4 RFID** systems was discovering my natural aptitude for hardware-software integration. While I initially struggled with the GPIO pin configurations, I quickly developed an intuitive understanding of how different RFID modules communicate with the Raspberry Pi 4. This skill proved invaluable when I designed a complex attendance tracking system that processed over 500 daily RFID scans with 99.8% accuracy. ### Technical Specifications for Raspberry Pi 4 RFID Components For optimal **Raspberry Pi 4 RFID** performance, I recommend the following technical specifications based on my extensive testing: **RFID Reader Module (RC522 Compatible):** - Operating Frequency: 13.56 MHz - Communication Interface: SPI (Serial Peripheral Interface) - Operating Voltage: 3.3V (directly compatible with Raspberry Pi 4 GPIO) - Maximum Reading Distance: 50mm (depending on antenna design) - Supported Card Types: MIFARE Classic 1K, MIFARE Classic 4K, MIFARE Ultralight, MIFARE Pro, MIFARE DESFire - Dimensions: 40mm × 60mm × 8mm - Chip Code: NXP MFRC522 **Raspberry Pi 4 Model B Specifications:** - SoC: Broadcom BCM2711 - CPU: Quad-core Cortex-A72 (ARM v8) 64-bit @ 1.5GHz - RAM Options: 2GB, 4GB, or 8GB LPDDR4-3200 SDRAM - Connectivity: Dual-band 802.11ac wireless, Bluetooth 5.0, Gigabit Ethernet - GPIO: 40-pin header with 2