2.4. Hardware
uFR Zero Online – Unified Firmware Package System
Last Updated: September 9, 2025µFR Zero Online – Unified Firmware Package System Introduction With the release of ESP32 firmware version 3.0.82, µFR Zero Online devices have adopted a unified firmware package system. This change simplifies firmware management by allowing developers to update both the ESP32 main controller and the NFC reader-writer in a single process. Instead of handling separate firmware updates, you now select from precompiled firmware packages that ensure both components always run mutually compatible versions. This article explains how the new system works, what package types are available, and how to resolve common issues when working with firmware packages. How Firmware Packages Work When you click “Check for Updates” in the device frontend: Individual firmware versions are no longer listed. Instead, you will see packages named in the format: Zero_Online_YYYYMMDD The date indicates when the package was created. A newer date corresponds to a newer firmware version. Once selected, the package automatically installs the correct versions of: The ESP32 main unit firmware The NFC reader firmware This ensures both parts of the device run on compatible builds. Package Variants Three types of firmware packages are available: Zero_Online_YYYYMMDD – the standard package for most devices. Zero_Online_Lite_YYYYMMDD – for Lite variants of µFR Zero...
USB-connected µFR Nano Online NFC RFID Reader Writer on the Raspberry Pi
Last Updated: October 10, 2023USB-connected µFR Nano Online NFC RFID Reader Writer on the Raspberry Pi To connect and run the µFR Nano Online reader plugged into the Raspberry Pi USB port, follow the instructions below: 1) USB-CONNECTED µFR NANO ONLINE NFC READER INSTALLATION All µFR series devices require FTDI drivers for USB communication. This also applies to the µFR Nano Online NFC reader if it is used as a standard USB device. If you have no FTDI drivers installed on your installed Raspberry Pi, please follow the manual for the FTDI drivers installed on the Linux-based platforms. This article is also available in our Knowledge Base. Important notice: Before you proceed with the µFR Nano Online implementation, make sure you grant the USB PORT access permission to the local user (the script is available in our GitLab projects repository). Once you have the FTDI drivers installed with your USB-connected NFC reader, you will be able to open the port and establish communication with the device by the ReaderOpen function provided by the ufr library. Important notice: The recommended library for the Raspberry Pi is the 64-bit aarch64. However, there are some known problems with aarch64 on a Raspberry Pi 4 with 8 GB...
µFR Nano Online reader features – brief overview
Last Updated: October 10, 2023µFR Nano Online is a great choice for a standalone device. Its “Master mode” allows you to send all NFC tag read data to a predefined server. The HTTP POST request method is used for the data sending. The user can choose to send cards/tags serial numbers only or to send all the tag content. Features Basic µFR Nano Online information µFR Nano Online is an NFC Reader with WiFi and BLE connectivity. Optionally, Ethernet connectivity is also available through an adapter board. µFR Nano Online has configurable GPIO (4 pins) and UART for connecting additional NFC Reader. The device also features external EEPROM and optional RTC (Real Time Clock). Link: https://www.d-logic.com/nfc-rfid-reader-sdk/wireless-nfc-reader-ufr-nano-online/ Device composition and compatibility Nano Online is comprised of two main boards: 1. µFR Nano NFC Reader 2. ESP32 add-on board Because this device integrates µFR Nano, it enjoys SDK and features our other µFR Series devices do. This includes: – SDK in multiple programming languages – Cross-platform libraries – NFC tag emulation – Digital Signing support – Working with MIFARE cards (Classic, Ultralight, Ultralight C, DESFire, DESFire Lite, Plus), NTAG2xx, NTAG DNA, JCOP (Java Cards)… – Ever upgrading firmware, library, and software SDK support – Browser extensions (Chrome,...
How to communicate with µFR device on Windows without FTDI drivers implementation
Last Updated: October 10, 2023How to use the µFR device on Windows without the FTDI drivers implementation: You can avoid using FTDI drivers (D2XX) by communicating with the reader via