How to recover the communication-lost µFR Nano Online

µFR Nano Online reader is “lost” after its firmware flashing or configuration setup #

– Recovery Manual – #

First, try to reset the reader to factory settings in order to eliminate any conflicts that may be caused by incorrect configuration.

Application of desktop tools:

1. µFR Online Configurator #

Instructions for use are available at https://www.d-logic.com/nfc-rfid-reader-sdk/software/%c2%b5fr-online-configurator/ By clicking on Connect uFR Online, this software automatically searches for ports and connects the Nano Online reader. If this does not happen, check if any other FTDI device is connected to the PC, which needs to be disconnected during work with this software. It is also possible that other processes in your system may affect the port search, so I recommend that you try to run the software several times in a row and connect the reader.

If this is successful, apply step 6. uFR Online Configurator – Reset configuration to the factory default described on the above page. This function will reset the reader’s working mode, all custom settings, and Wi-Fi credentials (the device will not be connected to the network). Therefore, all software functions will be returned to factory settings, but this will not affect the two firmware that the device uses.

Next, it is necessary to load two firmware files, first the Online firmware (ESP32), and then the uFR firmware (reader).

2. µFR Online Flasher #

Instructions for use are available at https://www.d-logic.com/nfc-rfid-reader-sdk/software/ufr-online-flasher/

This is a tool that you have already used before. You need to select the appropriate port to which the reader is connected and start the installation of the latest firmware version. There is no danger of damaging the device if the firmware is written more than once (there is no limit). It is only important to make sure that communication is not interrupted during the firmware writing process in the reader (e.g. unplugging the USB cable or forcibly turning off the software). Never use the OEM UNLOCK option!!!

3. µFR Flasher Plus #

This is a tool used to install the uFR firmware (NFC reader device). The instructions for use are simple. By launching the tool, the software automatically searches for ports and connects the detected device. If the connection is successful, the software will display a list of all available firmware versions. Select the latest version by entering its serial number and confirming with the Enter button.

If this procedure does not solve the problem, there is a chance that the baud rate of the reader has been changed (default settings https://www.d-logic.com/knowledge_base/%c2%b5fr-nano-online-default-settings/). This reader uses a baud rate of 115200, but we have recorded cases where this has been changed for some reason (to 9600).

If this is the case, you can try the following:

a) In Device Manager, change the device baud rate to 115200 and then try to load the reader firmware (description above – 3) µFR Flasher Plus), #

b) Download the µFR Readers Tool, which contains all reader configuration options. URL for download https://www.d-logic.com/code/nfc-rfid-reader-sdk/ufr_reader_tool #

Instructions for changing the reader baud rate can be found at https://www.d-logic.com/nfc-rfid-reader-sdk/software/ufr-readers-tool/ – 2. µFR Readers Tool – Baud Rate Settings.