µFR Classic is a first model in Digital Logic’s µFR Series of NFC RFID readers writers. It is NFC Forum & RFID compatible contactless reader/writer which successfully implements ISO14443 A & B and ISO18092 standards on HF working frequency of 13.56 MHz.
This device is genuine Digital Logic product, 100% designed, produced and programmed at company premises located in Serbia, Europe.
All models of uFR Series are using the same SDK API and are totally compatible and interoperable in common set of functions.


Device is primarily intended for developing companies and individuals (professionals and hobbyist) for further application and turnkey solutions development. For that reason it comes with fully featured SDK package, which includes firmware, libraries, software examples and documentation for various platforms, operating systems and developing environments. Regular SDK upgrades (including fi rmware, libraries and API) are launched often and can be obtained by company’s website for FREE. All products has extended „Three year”warranty.
All mentioned facts combined with free extensive and fast responsive support give this product an outstanding position in this industry sector. of purposes from making and programming of contactless cards according to the demand of end users, through access control and logging to use in a various security systems.
RFID nfc reader ufr


Reader’s RF communication is based on NXP’s powerful, highly integrated reader IC for contactless communication at 13.56 MHz, which supports all protocol layers of the ISO/IEC 14443 A, ISO/IEC 14443 B and ISO/IEC 18092 communication standards.
All variants of the Mifare® cards family (MIFARE Mini, MIFARE 1K, MIFARE 4K, MIFARE Ultralight, MIFARE DESFire EV1 and MIFARE Plus) RF identifi cation protocols are supported. Additionally, NFC Forum specifi cation for „Type 2 Tag” is supported, which adds NTAG2xx chip family to above list.
It has built-in anti-collision mechanism for detecting multiple cards at time.
Built-in well-tuned antenna provides proximity operating distance up to 80 mm (depending on card’s antenna geometry) and contactless communication speed at higher baud rates (up to 424 kBd).
Device also has built in Crypto1® algorithm and secure non-volatile internal key memory storage for better security. Communication with host is provided by using USB 2.0 Full Speed compatible interface. Data transfer rates are limited from 9600 baud to 1 Mbaud, for integrity and security reasons. Reader can also act as a serial interface device using FTDI’s Virtual COM port (VCP) drivers.


Audible (speaker) and 2 LEDs visible indicators are built in and absolutely user controllable.


Firmware has a lot of built-in complex functions which can be called via libraries provided in SDK API. Most of functions are written to make „life easier”, like:
  • Multiple readers on same host support
  • Whole set of commands for Mifare card manipulation according to manufacturer’s specification
  • Different addressing schemes (Block, BlockInSector)
  • Key storage manipulation (one way, write only, no reading of stored keys)
  • Different key applying modes (by index or scheme)
  • Value block manipulation
  • Treating whole card memory structure as linear space (very convenient for Mifare Classic cards)
  • NFC tags manipulation, NDEF format parsing in firmware
  • AES128 “on fly” hardware encryption built-in, which is the most important when working with complex DESFire security keys and cards
  • AES128 encryption of files and keys in DESFire cards
  • Asynchronous sending of card UID from reader to host COM port when card is present; feature is user programmable and many more…
Main point about firmware is that all firmware functions can be called via communication protocol, too.
That fact moves usage of this device into other dimension, meaning that this reader can be used on almost any platform which has serial interface, by simply using communication protocol. So it can be freely used on PC, tablet, smart phone, embedded systems, Raspberry Pi, Beagle Board, MIPS boards, PLCs and other platforms.
Firmware is regularly updated with new versions which include new features, improvements and bugfixes, while preserving backward compatibility with older versions. That means your code is safe, there is no need for changes when new firmware comes out. All firmware upgrades are totally FREE and can be obtained through download section of company’s website.

 Software Development Kit (SDK) package:

Reader comes with fully featured SDK which consist of external libraries, software examples with source codes, documentation about API reference and communication protocol and some useful software tools.
Libraries are cross-compiled for various platforms and regularly supported are Windows x86/x64, Linux x86/x64, Mac OSX x64, ARM and ARM HF. Other platforms can be supported as custom release, on customers demand, depending on existence of project or partnership relation.
Software examples are divided in three stages according to complexity, with some new additions of NFC examples.

 All examples are written for all major developing platforms and languages, like:

  • Java (and Java Applet example),
  • JavaScript (unique feature, convenient for PHP usage),
  • Lazarus,
  • Borland Delphi,
  • C++ Borland Builder,
  • Microsoft® Visual .NET family: C++, C#, VB
Other programming languages examples can be obtained on customer demand, , depending on existence of project or partnership relation.

 Software package includes set of very useful applications intended for everyday use, like:

  • Application for programming and manipulation of NFC compliant cards like NTAG and Mifare Ultralight, with source code included.
  • Android NFC phone App – Android NFC phone Application for Mifare card reading. Write a card with uFR, read it with NFC phone!
  • Card formatter – application for card/tag formatting and programming
  • µFR2FileSystem – keyboard simulation, card data reading, card data parsing into several formats and sending data to MySQL database via HTTP.
  • Application for NTAG and Mifare Ultralight card programming and manipulation.
  • Application for creating and writing common NDEF messages into NFC tags and cards
  • Reader Keys application – for easy manipulation of keys stored in reader
  • Application for managing of DESFire cards
Documentation contains fully explained API reference and communication protocol reference with real “hands-on” byte level examples for implementing communication protocol. However, API is much more comfortable and recommended way of implementation. Where not possible, implementation of communication protocol is very good alternative.
All libraries, software examples, tools and documents are regularly updated. They are totally FREE and can be obtained through download section of company’s website.
Our support team always provides quick response, usually not more than 24 hours, which also depends of complexity and question itself. Our support team always provides quick response, usually not more than 24 hours, which also depends of complexity and question itself.
We can also provide custom solutions based on each customer’s needs, so please free to contact us for any question or further help regarding your projects and implementation.


  • Electronic payment systems
  • Identification systems
  • Access control systems
  • Subscriber services
  • Banking systems
  • Digital content systems
  • Customer loyalty
  • Vending machines
  • Time & attendance
  • Machine work attendance
  • NFC cards and tags programming
  • NFC NDEF record management
  • Network access control
  • Inventory management
  • Software login management
  • Automatic fare collection
  • Public transportation terminals
  • Cashless payment
  • Parking lot systems
  • Reception desks
  • Visitor attendance
  • Authentication and authorization
  • Libraries, museums, stadium events
  • Parking lot systems
  • Reception desks
  • Visitor attendance
  • Authentication and authorization
  • Libraries, museums, stadium events


  • Identity verification, data exchange & contactless transaction
  • Useful for binding device to software license
  • Supporting multiple OS
  • USB compliant interface
  • Operating Frequency: 13.56MHz
  • Proximity read/write speed up to 424 kbps
  • Built-in antenna for contactless tag access, with card reading distance of up to 80 mm
  • Supports Mifare and other ISO 14443 Type A/B cards and tags
  • Built-in anti-collision feature
  • Reader locking by passwords and keys
  • Application Programming Interface:
  • Virtual COM through FTDI
  • User controllable LEDs
  • Three year warranty

Hardware features

Operating frequency13.56 MHz
Reading rangeDepending on antenna geometry and reader configuration, operating distance is 2-8cm (0,78”-3,15”)
Read/Write speedUp to 424 kbps
Supply current150mA (operating)
Supply voltage5V
Supported cards and tagsType A (Hardware + Software), Type B (Hardware)Supported cards: MIFARE Classic (4-byte and 7-byte), Mifare Ultralight/Ultralight C (Non-Secure Mode), NTAG203F
Connection and power supplyUSB port
SoftwareThe µFR software contains the library for working with Java, Java Applet, JavaScript, Lazarus, Delphi, C + + Builder, Microsoft® Visual C++ .NET, Microsoft® Visual C #, Microsoft® Visual Basic .NET
Supported Operating SystemsMicrosoft® Windows™, Linux®, OS X, Android
Smart Card InterfaceISO14443A/B
Related equipmentUSB cable, Free software download
Optional equipmentBuzzer, Real Time Clock (RTC), EEPROM
Weight0.21kg nett
Dimensions16cm x 12.6cm x 3.2cm (6,3” x 5” x 1,2”)
AccessoriesCards, keyfobs or tags