Gravity: UART & I2C NFC Module 近場通訊模組 全功能NFC,支持M1、NTAG等主流卡片與標籤


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Gravity: UART & I2C NFC Module 近場通訊模組 支援串口與IIC通訊 也支援 Micro:bit

Gravity: UART & I2C NFC Module 近場通訊模組 採用 NXP PN532 進口高集成NFC通信晶片,支援市面上常見的各類MIFARE Classic S50/S70系列(即M1卡)和NTAG21x系列等工作頻率在13.56Mhz的NFC電子標籤或卡片。在繼承之前版本大PCB天線所帶來較大通信距離優點的基礎上,升級版採用Gravity標準的PH2.0-4P介面,除了讓接線更方便,在保留UART的基礎上額外複合了I2C,通過開關輕鬆切換兩種不同的介面,使用更靈活。當使用UART串口時,可以利用市面上常見的USB to UART轉換器和協力廠商上位機軟件輕鬆讀寫操作各類NFC卡。當使用I2C介面時,則可用於Arduino、micro:bit、FireBeetle ESP32、FireBeetle ESP8266等各類3V3/5V主控系統。


近場通信(Near Field Communication,NFC),又稱近距離無線通信,是一種短距離的高頻無線通信技術,允許電子設備之間進行非接觸式點對點數據傳輸(在十釐米內)交換數據。這個技術由免接觸式射頻識別(RFID)演變而來,並向下相容RFID,最早由Sony和Philips各自開發成功,主要用於手機等手持設備中提供M2M(Machine to Machine)的通信。由於近場通訊具有天然的安全性,NFC技術被廣泛用於POS機移動支付、公交卡、銀行卡、門禁卡、飯卡、水卡等多種場合。

Gravity:UART & I2C NFC近場通訊模組IIC接線圖(Arduino UNO)


Gravity:UART & I2C NFC近場通訊模組IIC接線圖(micro:bit+micro:IO擴展板)


Gravity:UART & I2C NFC近場通訊模組UART接口接線圖(USB轉UART+PC)


  • NXP進口高集成NFC通信晶片
  • UART & I2C複合介面,使用靈活
  • 支援各類主流NFC電子標籤或卡片
  • 相容3V/5V控制器


  • 非接觸式支付系統
  • 藍牙和WiFi設備的鏈接
  • 分享聯繫人、照片和視屏等社交分享功能
  • 智能手機的NFC應用


  • 主晶片:NXP PN532
  • 供電電壓:3V ~ 5.5V
  • 通信介面:Gravity I2C & UART複合(0-4P,邏輯電平0-3.3V)
  • 串口串列傳輸速率:115200 bps
  • I2C地址:0x48
  • 通信頻率:56MHz
  • 最大通信距離:不低於10mm,實際視標籤大小而定
  • 支持協議
  • 讀寫器模式:支持ISO/IEC 14443A、ISO/IEC 14443B、MIFARE協議、FeliCa協議
  • 卡模擬模式:支持ISO 14443A、MIFARE Classic 1K或4K、FeliCa協議
  • 點對點通信:ISO/IEC18092,ECM340
  • 尺寸:110×50 mm
  • 重量:20 g


  • Gravity:UART & I2C NFC近場通訊模塊 x1
  • Gravity-4P I2C/UART傳感器連接線 x1
  • 54-2P黑色直單排針         x1
  • 圓形可粘貼NFC標籤(M1卡相容) x1


Gravity: UART & I2C NFC Module

Gravity: UART & I2C NFC Module adopts NXP PN532, a highly integrated NFC communication controller, which supports various types of NFC smart cards or tags like the commonly used MIFARE Classic series and NTAG series in the market. Apart from the large PCB antenna design of better communication area and distance , the upgraded version joins the Gravity family by adopting a standard Gravity PH2.0-4P interface with I2C & UART composite rather than 2.54mm headers, making the wiring more convenient. A switch is added for conveniently switching between these two interfaces. When using the UART, you can easily read and write various NFC cards by using the common USB to UART converter and PN532 compatible PC software. When using the I2C interface, it can be used for various 3V3/5V controller such as Arduino, micro:bit, FireBeetle ESP32 and FireBeetle ESP8266.

About NFC

Near Field Communication (NFC), also known as short-range wireless communication, is a short-range high-frequency wireless communication technology that allows non-contact point-to-point data transmission (within ten centimeters) to exchange data between electronic devices. . This technology evolved from contactless radio frequency identification (RFID) and is backward compatible with RFID. It was first developed by Sony and Philips, and is mainly used to provide M2M (Machine to Machine) communication in handheld devices such as mobile phones. Because of the natural security of near field communication, NFC technology is widely used in POS mobile payment, bus cards, bank cards, access cards, water cards and other occasions.

Connection Diagram

Gravity: UART & I2C NFC Module IIC connection diagram (Arduino UNO)

Gravity: UART & I2C NFC Module UART connection diagram (USB to UART+PC)

Gravity: UART & I2C NFC Module UART connection diagram (MEGA2560)


  • NXP highly integrated NFC controller
  • Gravity I2C & UART composite interface, flexible use
  • Support various kinds of mainstream NFC smart cards or tags
  • Compatible with 3.3V/5V controller


  • Contactless payment system
  • Links for Bluetooth and WiFi devices
  • Social sharing features like contacts, photos, and videos
  • Smartphone NFC application


  • IC: NXP PN532
  • Input Voltage (VCC) : 3.3V~5.5V
  • Interface: Gravity I2C & UART (PH2.0-4P, Logic Level 0-3.3V)
  • UART Baud Rate: 115200 bps
  • I2C Address: 0x48
  • Communication Frequency: 13.56 MHz
  • Maximum Communication Distance: ≥10mm,depend on the size of the NFC card/tag
  • Protocol Support:

Reader/Writer Mode: ISO/IEC 14443A, ISO/IEC 14443B, MIFARE, FeliCa

Card Emulation Mode: ISO 14443A/MIFARE Classic 1K or 4K, FeliCa

Peer-to-Peer: ISO/IEC18092, ECM340

  • Dimension: 110×50 mm / 4.33×1.97 in
  • Weight: 20 g




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