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M5Stack NFC Universal Unit (ST25R3916) - 13.56MHz RFID Reader/Writer Module

M5Stack NFC Universal Unit (ST25R3916) – 13.56MHz RFID Reader/Writer Module

SKU: U216 Categories: RFID Reader, RFID Emulator
Brand: MTools Tec

$9.99

SKU: U216 – High-performance NFC/RFID read/write unit with ST25R3916 IC supporting ISO14443A/B, FeliCa™, ISO15693 protocols. Features I2C interface, card emulation mode, and LEGO-compatible design for access control, identity verification, and smart transportation applications.

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Overview

Unit NFC is a near-field communication read/write unit operating at 13.56 MHz. It 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. Communication with the host is via I2C interface for stable and reliable data transmission. The LEGO-compatible hole design makes structural integration straightforward.

Features

13.56 MHz high-frequency near-field communication
Equipped with ST25R3916 high-performance NFC IC
Supports ISO 14443A, ISO 14443B, FeliCa™, and ISO 15693 protocols
Three operating modes: Reader/Writer / Card Emulation / Custom Protocol
I2C communication interface (@0x50, 100K / 400K)
Read/write range: ≤ 40mm
LEGO-compatible mounting holes for easy structural integration

Supported Protocols

Reader / Writer Mode

NFC-A (ISO 14443A)
NFC-B (ISO 14443B)
NFC-F (FeliCa™)
NFC-V (ISO 15693)

Card Emulation Mode

NFC-A
NFC-F

Specifications

Parameter	Value
IC	ST25R3916-AQWT
Operating Frequency	13.56 MHz
Communication Interface	I2C @0x50 (100K / 400K)
Read/Write Range	≤ 40mm
Power – Sleep	5V @ 19.33 µA
Power – Continuous Reading	5V @ 67.65 mA
Power – Intermittent Reading	5V @ 66.48 mA
Product Size	48.0 × 24.0 × 8.0 mm
Product Weight	5.9 g
Package Size	138.0 × 93.0 × 9.0 mm
Gross Weight	11.5 g

Includes

1 × Unit NFC (ST25R3916)
1 × HY2.0-4P Grove Cable (20cm)

Applications

Access control systems
Identity authentication & verification
Smart transportation
NFC/RFID tag read/write tools
Contactless payment prototyping

Development Platforms

UiFlow2
Arduino IDE

📄 Official Documentation (docs.m5stack.com)

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How to deliver the virtual products?

The virtual products are delivered by email in time when order with only virtual products.

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We offer both standard and expedited shipping options for our customers. The delivery times may vary depending on the shipping address.

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Yes, once your order has been dispatched, we will send you a shipping confirmation email with your tracking number. You can use this number to track your shipment’s progress.

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The delivery time varies depending on your location and the chosen shipping option. Typically, it takes about 5-10 business days for standard shipping and 2-5 business days for expedited shipping.

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Depending on the status of your order, it may be possible to change the shipping address before the package dispatched oversea. Please contact our customer support as soon as possible to request changes.