{"product_id":"elecrow-crowtail-nfc-20-rfid-reader-module-arduino-iot","title":"Elecrow Crowtail NFC 2.0 RFID Reader Module - Arduino \u0026 IoT","description":"\u003ch1\u003eElecrow Crowtail NFC 2.0 RFID Reader Module - Read\/Write 13.56MHz NFC Tags\u003c\/h1\u003e\n\n\u003cp\u003eThe Elecrow Crowtail NFC 2.0 is an RFID reader module based on the PN532 chip, designed for easy integration with Arduino, ESP32, Raspberry Pi, and other IoT platforms. It supports reading and writing of 13.56MHz NFC tags including MIFARE, NTAG, and FeliCa. The Crowtail connector allows plug-and-play connection without soldering, making it ideal for prototyping access control systems, interactive installations, and contactless payment solutions.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eChipset\u003c\/td\u003e\n\u003ctd\u003eNXP PN532\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e3.3V (5V tolerant on data pins)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCommunication Interfaces\u003c\/td\u003e\n\u003ctd\u003eI2C, SPI, UART (selectable)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Frequency\u003c\/td\u003e\n\u003ctd\u003e13.56 MHz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRead\/Write Distance\u003c\/td\u003e\n\u003ctd\u003eUp to 5 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSupported Standards\u003c\/td\u003e\n\u003ctd\u003eISO\/IEC 14443 A\/B, FeliCa, NFCIP-1\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-servo-door-lock\"\u003eNFC door lock using an Arduino and solenoid\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eContactless attendance system for schools or offices\u003c\/li\u003e\n  \u003cli\u003eMobile payment terminal prototype with a screen\u003c\/li\u003e\n  \u003cli\u003eInteractive product display that reads NFC tags to show info\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis module is compatible with any microcontroller that supports I2C, SPI, or UART communication. It works seamlessly with Arduino Uno, Mega, Nano, ESP8266, ESP32, and Raspberry Pi. When using 5V systems, the module’s logic-level conversion allows safe connection, but for 3.3V boards, no level shifting is needed.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eFor I2C connection (default), connect the module's VCC to 3.3V (or 5V if using a 5V board), GND to GND, SDA to SDA, and SCL to SCL. Ensure the I2C pull-up resistors are present (usually internal on Arduino boards). If using SPI, select the SS pin accordingly.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino Uno?\u003c\/summary\u003e\u003cp\u003eYes, the Crowtail NFC 2.0 works with Arduino Uno out of the box. Connect via I2C using the provided Crowtail cable to the corresponding I2C pins (A4 for SDA, A5 for SCL).\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan it write data to NFC tags?\u003c\/summary\u003e\u003cp\u003eAbsolutely. The PN532 chip supports read and write operations for most NFC tag types, including NTAG215 and MIFARE Classic, using libraries like Adafruit PN532.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is the maximum reading distance?\u003c\/summary\u003e\u003cp\u003eThe typical reading distance is 3–5 cm, depending on the tag size and antenna design. For optimal performance, ensure no metal objects are behind the tag.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53444946035053,"sku":"CDN-0038","price":1530.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_db4e9e30-f9c0-46f1-98d8-8944541fc4bd.jpg?v=1781512111","url":"https:\/\/compoden.com\/products\/elecrow-crowtail-nfc-20-rfid-reader-module-arduino-iot","provider":"Compoden","version":"1.0","type":"link"}