
The µFR Classic CS NFC RFID contactless Reader Writer is a smaller-sized version of the µFR Classic NFC Reader. It is a card-size RFID NFC Reader Writer primarily designed as a professional tool for IT companies and individuals engaged in RFID NFC solution development.
It comes with free SDK source code examples, cross-platform libraries, upgradeable firmware, and a well-documented API and communication protocol.
We also provide plug-and-play apps that make µFR Classic CS an excellent choice for end-users, as well.
This small but powerful device is fully featured and fully NFC compatible. It is available with USB, UART (TTL), or RS232 connectivity options.
Followed by a well-documented API, software SDK, cross-platform libraries, firmware upgrades, and excellent technical support, it’s a No 1 tool for any RFID NFC custom project development.
In addition to the final product in an attractively designed and customizable case, µFR Classic CS RFID NFC reader/writer is also available as an OEM NFC module with a connector of the customers’ choice.
Important Notice: Legacy µFR SERIES
The µFR SERIES product group represents our legacy NFC RFID reader/writer devices. While these products have served countless applications over the years, they are no longer recommended for new projects. To ensure the best performance, compatibility, and long-term support, we strongly encourage you to explore our latest product line, µFR ZERO SERIES. This next-generation product group features cutting-edge technology, enhanced performance, and diverse models to meet a variety of needs.
Browse the range: µFR ZERO SERIES.
µFR Classic CS NFC reader is primarily intended for development companies and individuals (professionals and hobbyists) for further applications and turnkey solutions development. For this reason, it comes with a fully-featured Software Development Kit, including firmware, libraries, source code examples, and documentation for various platforms, operating systems, and development environments. We launch upgrades frequently (including firmware, libraries, and API), all available to download at our official website for FREE.
In addition to the facts mentioned above, our free, extensive, and fast-responsive support brings RFID NFC Reader Writer – µFR Classic CS to an outstanding position in this industry sector.
This RFID NFC readers’ RF communication is based on its robust, highly integrated NXP IC interface. The device operates on HF 13.56 MHz and successfully communicates with cards, labels, wristbands, and tags of ISO/IEC 14443 A, ISO/IEC 14443 B, and ISO/IEC 18092 standards.
With outstanding modulation and demodulation concepts and many integrated 13.56 MHz contactless communication protocols, this device implementation becomes reliable and simple for every RFID NFC solution developer.
Both hardware and software, are fully developed, tested, and successfully implemented with MIFARE®, NTAG21x, NTAG 4xx DNA, and JCOP family cards/tags:
Besides, this tool supports all other tags compatible with the listed above.
This RFID device also has a built-in Crypto1® algorithm and secure non-volatile internal key memory storage for better security. Communication with the host is provided by using the USB 2.0 Full Speed compatible interface. Data transfer rates are limited from 9600 baud to 1 Mbaud, for integrity and security reasons. This NFC RFID Reader can also act as a serial interface device using FTDI’s Virtual COM port (VCP) drivers.
Even though the supported technologies list is already wide, our development team constantly works on product improvements and upgrades, staying in line with this technology’s global trends.
Audible (speaker) and 2 RGB LEDs visible indicators are built-in and completely user-controllable.
Digital Logic proprietary interoperable firmware runs on all MCU platform based µFR Series hardware. The reader and the host establish communication through the high-speed FTDI chip direct access.
At the core, on the communication level, the device uses a Digital Logic unique proprietary communication protocol.
µFR Series firmware contains many complex built-in functions that can be called via libraries explained in API docs.
Most of the functions are developed to make „ life easier” for developers and integrators by decreasing their development time, such as:
The μFR Firmware key feature is the ability to call all its functions using our communication protocol.
Therefore, the μFR device implementation is possible on almost any platform with a serial interface by using the communication protocol.
Supported platforms include:
Frequent firmware updates include new features, improvements, and bug-fixes while preserving backward compatibility with the previous versions.
Accordingly, project code and developed software are safe, so there is no need for any changes after a firmware upgrade.
All firmware updates and upgrades are FREE and available at the Digital Logic official GitLab repository.
This RFID NFC reader comes with a fully-featured Software Development Kit with external libraries, examples with source codes, documentation about API reference, communication protocol, and many useful software tools.
Libraries are cross-compiled for various platforms and so far support:

Our team is ready to develop additional SDK examples in other programming languages on client requests. The request realization speed depends on our current project plans and eventual partnership agreement.
Downloads: API Documentation, µFR COM Protocol, Software source code examples with SDK
The documentation contains a detailed explanation of API and communication protocol reference with actual byte-level examples for communication protocol implementation. Our API provides a very comfortable way of implementation, and we highly recommend it. When API implementation is not possible, a communication protocol is a very good alternative. We provide regular updates for all libraries, firmware, examples, tools, and documents. Updates are FREE and are available for download from the official Digital Logic GitLab repository.
Our tech support team is available to assist with all inquiries you may have. After submitting a free technical support ticket, you should receive a response within two to fifteen days, depending on the intricacy of your inquiry. Please refer to our premium technical support plans for swift assistance.
We are open to custom development requirements based on specific customer needs. Feel free to contact us for any questions or further assistance regarding your projects and implementation.
| Feature | Description |
|---|---|
| Operating frequency | 13.56 MHz |
| Read range | Operating distance is 0-60mm (0”-2.36”), depending on the antenna geometry and reader configuration |
| Read/Write speed | Up to 424 kbps |
| Supply current | 150mA (operating) |
| Supply voltage | 5V |
| Supported cards and tags |
MIFARE® family: MIFARE Mini®, MIFARE Classic® (1K, 4K, EV1), MIFARE Ultralight®, MIFARE Ultralight C®, MIFARE PLUS® (2K, 4K, S, X, EV1), MIFARE DESFire® (Light, 2K, 4K, 8K, EV1, EV2) NTAG® family: NXP NTAG® 2xx Type 2 (210, 213, 215, 216 Tag Tamper), NXP NTAG® 4xx DNA Type 4 (413, 424) SmartMX® family: NXP JCOP® Java Card (J3A040, J3A081, J3H145, JC30M48CR) |
| Connection and power supply | USB port |
| Software | Library and SDK for Java, Java Applet, JavaScript, Node JS extensions, Lazarus, Borland Delphi, C, C + + Builder, C++ WxWidgets, Microsoft® Visual C++ .NET, Microsoft® Visual C #, Microsoft® Visual Basic .NET, PHP, Python, and Arduino IDE examples |
| Supported Operating Systems | Microsoft® Windows™, Linux®, macOS, Android |
| Supported platforms | Windows x86/x64, Windows ARM/UWP, Linux x86/x64, Linux ARM/ARM64/ARMHF, macOS x64, iOS x64, Android, Arduino, ESP32 |
| Smart Card Interface | ISO14443 Type A & B, ISO18092 |
| Related equipment | USB cable, Free software download; Optional: RF Booster, SAM Slot |
| Certification | CE, RoHS |
| Accessories | Cards, key-fobs, labels, wristbands, tags |
| Model | Dimensions (mm) | Device | Commercial Set |
| µFR Classic CS | 86 x 54 x 9 | 40 g | 126 g |
| µFR Classic CS OEM | 84 x 50 x 5 | 17 g | 103 g |
An extended Upgradable (3-year or 5-year) warranty is available on request. Contact us for more details.