M5Stack NFC Universal Unit (ST25R3916)

The M5Stack NFC Universal Unit is a versatile 13.56MHz NFC/RFID read and write module with support for multiple protocols, making it suitable for access control, identity verification, smart transport, and custom NFC applications. The M5Stack NFC Universal Unit is a near-field communication read/write unit operating at 13.56 MHz. The module features the ST25R3916 high-performance NFC front-end IC, supporting mainstream protocols including ISO 14443A, ISO 14443B, FeliCa™, and ISO 15693, enabling reliable read/write operations and data exchange with a wide variety of NFC/RFID tags and cards. The IC supports reader/writer mode, card emulation mode, and custom protocol mode, with automatic antenna tuning, high-sensitivity reception, and comprehensive protocol handling capabilities. This unit communicates with the host device via I2C interface, ensuring reliable and stable data transmission. The product features a LEGO-compatible hole design for easy structural integration and screw-mount installation, making it suitable for a wide range of near-field communication and identity verification applications, including access control systems, identity authentication, and smart transportation. Features

* 13.56 MHz high-frequency near-field communication * Equipped with ST25R3916 high-performance IC * Supports ISO14443A, ISO14443B, FeliCa™, and ISO15693 protocols * Supports three operating modes: Reader/Writer / Card Emulation / Custom Protocol * I2C Communication interface * LEGO-compatible mounting holes * Development Platform

* UiFlow2 * Arduino IDE

Specifications IC Type ST25R3916-AQWT Operating Frequency 13.56 MHz Communication Interface I2C @0x50 (100K / 400K) Supported Protocols Reader/Writer Mode: NFC-A/B (ISO 14443A/B compatible), NFC-F (FeliCa™), NFC-V (ISO 15693) Card Emulation Mode: NFC-A / NFC-F Read/Write Range ≤ 40mm Power Consumption Sleep: 5V @ 19.33uA Power-on (unconfigured): 5V @ 19.79uA Continuous reading: 5V @ 67.65mA Intermittent reading: 5V @ 66.48mA Product Size 48.0 x 24.0 x 8.0mm Product Weight 5.9g Resources

* Product documents Package Contents

* 1x M5Stack NFC Universal Unit (ST25R3916) * 1x HY2.0-4P Grove Cable (20cm)