Adafruit ST25DV16K I2C RFID EEPROM Breakout - STEMMA QT / Qwiic
We have ✅ 7 available of the AF-4701 in our Sydney warehouse. An extra 25 units available with a short lead time.
The Adafruit ST25DV16K is a unique I2C-programmable RFID EEPROM breakout that works with mobile phones as an ISO/IEC 15693 (13.56 MHz) NFC tag, but can be dynamically rewritten over I2C by a microcontroller. This makes it ideal for projects where you need to change tag content on the fly — for example, cycling through different URLs that a phone detects in sequence.
The breakout includes the ST25DV16K chip, support circuitry, and a PCB trace antenna. STEMMA QT / Qwiic connectors allow solderless I2C connections, and standard 0.1" headers are included for breadboard use.
Key Features
- ST25DV16K Chip – 16 Kbit I2C EEPROM with ISO/IEC 15693 RFID interface
- I2C Programmable – Dynamically rewrite NFC tag content from a microcontroller
- Phone Compatible – Readable by Apple and Android devices as an NFC tag
- PCB Trace Antenna – Built-in antenna, no external antenna needed
- STEMMA QT / Qwiic – Solderless I2C connectors on both sides
- Bidirectional Data Transfer – Can be used as an I2C-to-RFID bridge for wireless data exchange with mobile devices
Ideal For
- Dynamic NFC tags that change content programmatically
- Interactive displays and exhibits
- Wireless data transfer between microcontrollers and phones
- IoT projects requiring phone-readable tags
Package Contents
- 1× ST25DV16K breakout board with PCB antenna
- 1× Header strip
Resources
The Adafruit ST25DV16K I2C RFID EEPROM Breakout - STEMMA QT / Qwiic appears in the following collections:
