ST25 NFC/RFID tags and readers

Dear Sir,We are going to write a ST25R3916 driver (only support SO15693) for our platform which use ThreadX RTOS. As a porting reference, could you tell me where I can get the source code of ST25R3916 driver?best regardsDai Sai

Hi,We are using NFC reader IC: CR95HF using uart communication with our micro-controller.We are using external antenna for antenna, Is there any way to detect NFC antenna is connected to CR95HF ?Thank you in advance,Jignesh Patel

Hi,I am working on linux kernel v4.19 to bring up the cr95hf via SPI, there is a existing driver called st95hf, I enabled it, and it can be probed. can get ECHO back. when I used nfc neard to test the driver, it always gives errors like below:[ 501.027260] spi_geni 988000.spi: Zero length transfer[ 501.027307] st95hf spi1.0: SPI transfer failed: -22[ 501.027393] spi_master spi1: failed to transfer one message from queue[ 501.027436] st95hf spi1.0: spi_recv_resp, data read error = -22[ 501.027471] st95hf spi1.0: spi error from st95hf_spi_recv_response(), err = 0xffffffea[ 501.027506] nfc nfc0: protocol sel send field off, err = 0xffffffea[ 501.036499] digital: digital_in_configure_hw: in_configure_hw failed: -22[ 501.037971] spi_geni 988000.spi: Zero length transfer[ 501.038042] st95hf spi1.0: SPI transfer failed: -22[ 501.038181] spi_master spi1: failed to transfer one message from queue[ 501.038246] st95hf spi1.0: spi_recv_resp, d

Hi,I got a question about the design of the antenna for NFC. On my PCB, I'm copying the antenna that there is on the ANT7-T-M24SR. But the difference is that my PCB is 1.6mm of thickness (instead of 0.8mm of the dev board).Moreover, I've read (I think it was on that forum) that the value of L decrease of 0.4µH with a PCB of 1.6mm of thickness compared with a PCB of 0.8mm of thickness.So, how can I be sure that my antenna is well designed ?For now, I've added a capacitor in parallel of AC0/AC1 to adjust Ctuning if needed.I've found some information on edesign to design one layer antenna but nothing about two layers antenna. Where can I find some documentation about that ?Thank you in advance;Fabrice

Hi everybody,I'm working on NFC tag. I'm using a ANT7-T-M24SR deb board. This one communicates in I2C with an ESP32.First, I tried to read the dev board with a cellphone, and it worked well (URL : st.com)Then I tried to write "Hello world" in the NDEF memory of M24SR and it was written into the memory, and I succeded to read it (only one time) with my cell phone.So now, I have written another message, I think it's well writed into the memory (please see picture below) but I cannot read it with my cellphone.I have one question :After that I closed the I2C session, does I need to do something to reactivate the RF ? Because, by reading the System file, I see that the byte (offset = 0x0006) is sometimes at 0x09 (RF enabled) and sometimes at 0x00.I hope my resquest is enough clear, please find below the different questions/answers between µc and M24SR. 

​Hello, I am developing Arduino using CR95HF.I succeeded in reading the Tag ID using Cr95HFIf you read it with mifareCard 1K, you can read the Tag ID, but it does not read/write the memory sector.I need to go through the authentication method to read, but I would appreciate it if you could tell me how to use it because there is no description. Can you provide the data informally?Thank you.

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Hi all, I'm trying to write a simple code to read a Tag NFC type 2. I have a EVK NUCLEO stm32F446 and X-nucleo-NFC06A1, I want connet they with I2C. and write a simple code to wake up st25 when I send a high signal and read eeprom of tag and show this information via UART.

Dear Sir,When I read 2.2.4 in the datasheet, there is a Note asUsing hardware based wake-up in combination with the automatic antenna tuning feature isnot recommended. Contact your nearest ST office for further support.Could you tell me where I can find more information about the reason? What kind of wake-up is referred to in this note? is it the low power card detectionmentioned in capacitive sensor (4.2.4)? or Wake-up mode in 4.2.5? Are the above functions unavailable, if automatic antenna tuning is used?best regardsDai

I'm trying to port the NFC-RFAL library to a smaller Arduino based MCU. I need an extremely minimal setup for retrieving UIDs from ISO15693 tags, so I'm getting rid of 50-80% of the state machines and structures, the whole analogConfig module, maybe anti-collision if I can, etc.In the library, we often call rfalSetAnalogConfig() to set a bunch of registers using a look-up table. Here's a list of calls I might need that I found, scattered across the library.rfalSetAnalogConfig((RFAL_ANALOG_CONFIG_TECH_CHIP | RFAL_ANALOG_CONFIG_CHIP_INIT)); rfalSetAnalogConfig((RFAL_ANALOG_CONFIG_POLL | RFAL_ANALOG_CONFIG_TECH_NFCV | RFAL_ANALOG_CONFIG_BITRATE_COMMON | RFAL_ANALOG_CONFIG_TX)); rfalSetAnalogConfig((RFAL_ANALOG_CONFIG_POLL | RFAL_ANALOG_CONFIG_TECH_NFCV | RFAL_ANALOG_CONFIG_BITRATE_COMMON | RFAL_ANALOG_CONFIG_RX)); rfalSetAnalogConfig((RFAL_ANALOG_CONFIG_TECH_CHIP | RFAL_ANALOG_CONFIG_CHIP_POLL_COMMON)); rfalSetAnalogConfig((rfalAnalogConfigId)(RFAL_ANALOG_CONFIG_POLL | RFAL_ANALOG_CONFIG_

We are developing RFID reader with ST25R3916. As design reference and parts selection, I wonder if we can get the schematic and BOM of ST25R3916-EMVCO. best regardsDai Sai

Hi all,I'm trying to read and write values to an STmicro tag(ST25TA02KB-D,  ISO 14443-4) using the X-Nucleo board from a python program. I've tried a number of approaches(waveshare pi hat, standalone PN532 modules, using libnfc and adafruit libraries, to list) but none really work and it's honestly a little out of my depth. Currently I've built the Linux nfc polling demo included with the X-Nucleo board, but even that fails to run(see attached)If I had resources or python examples using any of these systems, I could probably figure it out, but all the support I've found seems to apply mainly to mifare classic cards.If anybody has experience or pointers for any of this I'd be quite grateful to hear it!

I tried to build the NFC Tap app in iOS, but was not able to compile.I added the J2ObjC paths.The problem is a Swift Compiler Error in the include chain, see screenshot.

Hello,I have a nucleo-nfc06a1 board that I would like to use for wireless charging and communications to a st25dvi2c tag. On the tag side, I have a rectifier bridge that supplies a battery charger. The resonant frequency of the tag antenna has been set to 15MHz and has an inductance of 1uH, as was suggested by STMicro. On the reader side, I am able to swap the impedance matching network components for ones that will provide maximum power. I can use a VNA to ensure that the system impedance is resonant at 13.56 MHz for a given impedance. I can snap off and solder on another coil with higher Q and higher inductance if needed. The registers on the ST25r3916 have been set according to the st25r3916 disco board register readout for NFC-V configuration.In the past I have tried the following:-Setting the internal regulator to 5V (as opposed to the auto-regulator setting)-Replacing the coil with a 200 Q, 3uH antenna (5cm in diameter)-Setting the impedance matching network to be resonant at val

Hello,I have a problem with the ST25DV04KC-IE.In the datasheet the register MB_WDG (000Eh) must have a factory value of 0x03 but my chips have 0x1a. Bits 3-7 are RFU in the datasheet. Do you know why there is a difference?The real problem is that I tried to change this value to 0x00 through I2C to disable the WD. When I write 0x00 in this register, the I2C become "broken" and answer NACK to each read/write command. I have this problem on 2 boards so my two boards are bricked.I try to change this value through NFC and the ST25 app without any success. I can change the register 0Dh but I've an error with the register 0Eh. (Error 01 10 (ISO15693_BLOCK_NOT_AVAILAB...)).How can I reset my board to the factory value?Thank you.Edit: With the ST25DV_discovery_ANT_C1 (ST25DV04K-J), I can set MB_WDG to 0x00 and I can change the MB_WDG register through NFC.

Hello,We currently have a desktop application based on C# for communicating between ST25R3911B-DISCO board and ST25DV dynamic tag. The application itself is similar to ST PC software for ST25R3911B-DISCO board but with limited functionalities as currently we only need Fast Transfer Mode for communication. My PC software based on C# is able to perform inventory discovery successfully, and is also able to read the data from mailbox (verified by writing data to mailbox using ST software and reading data by using C# software). But issue arrives when i try to perform Mailbox write operation, the error returned is invalid command code for write operation. I looked at the ST25DV datasheet for RF commands and frame formats also the logs of the ST PC software to understand how the write operation data frame is transmiited but that's different from the data frame that's sent from my application. There are files in my project which adds the protocol header to data frame. So can anyone please help

I am using ST25DV. Access from RF must be restricted.I'm trying to use RFSwitchOff / RFSwitchOn for this purpose, but NACK is returned.Before using these, I changed the I2C_CFG setting in the System register to 0x3A (I2C_DEVICE_CODE: 1010, I2C_E0: 1, I2C_RF_SWITCHOFF_EN, 1).I got the value of I2C_CFG of System register and confirmed that it is 0x3A.And I use the following address.RF SwitchOff: 0xA2(Slave address + W(0))RF SwitchOn: 0xAA(Slave address + W(0))Start condition + RF Switch Off or On->NACKPlease give me some advice to solve this problem

Hello,I am currently interfacing ST25DV with STM32L073 MCU using lower level drivers for I2C instead of HAL drivers. I have successfully configured and tested the ST25DV FTM mode.Now i want to use the user memory region in ST25DV to store product information. So what should be the steps to write and read from the user memory (EEPROM) ? As per the docs, i have to disable the mailbox to have access to EEPROM. So i disabled the mailbox using dynamic register. Than opened I2C session by passing password. Using i2c write function tried writing a single byte to 0x0000 address but write function failed. When i try using HAL driver it gives me error code of 1. So can anyone please tell me the step for writing / reading from the user memory EEPROM in ST25DV04K.

Hello Developers,I am currently working on a project that includes NFC communication using ST25R3911B-DISCO board and ST25DV NFC tags. The project also includes development of custom GUI application similar to STSW-ST25R001 software. Currently i am using STSW-ST25R001 PC software to communicate with ST25R3911B-DISCO board. But can any one let me know is there JAVA source code available for STSW-ST25R001 software ? And if yes please share the necessary links.

The Antenna reference boards for ST25DV04K dual interface EEPROM says that I can download (The ANT-1-6-ST25DV PCB files can be downloaded from www.st.com), but the link is not available. please help download.https://www.st.com/resource/en/board_manufacturing_specification/ant_c1_gerber.ziphttps://www.st.com/resource/en/board_manufacturing_specification/ant_c6_gerber.zip

It says that we can download The Aantenna-1-6-ST25DV PCB files from www.st.com, but the link is not available. Could you please send us the available link to download the antennas PCB file ? 

Hello everyone, I aim to build a self-made NFC reader based on a ST25R3916. I've read an application note about automatic antenna tuning (AAT) :AN5322 There is a reference to a STPTIC-0N variable capacitor series that is compared to LXRW series from Murata. However, I can't find any trace of this product outside of the application note, even on ST website. Do you know where to find this product ? Thank you for your answers !

Hallo all,I want to check the reading performance of ST25R3918 with our original antenna.On your site, we can use ST25R3916DISCO for testing ST253918, but outpur power is different.How can I test the performance of ST25R3918 with ST253916DISCO?Do I need to replace IC chips?​Please tell me the ditails of the evaluation method.​​Best Regards,Hiromi Murayama

I can operate AP2P on the NFC05A01 board using Cube example code at 424kbps and it works well with bidirectional messaging. The data throughput meets my needs but I am looking to improve the latency to <1msec for my application. I only need a high speed unidirectional comms link after establishing the link.I have ran into two problems:- The AP2P comms in the RFAL code has to be bidirectional and there is a a few milliseconds delay to switch from send to receive. I can't find any way to stop this or reduce the turnaround delay.The VHBR data rates do not work - they appear to be inhibited when selected.Any ideas to the above would be very welcome.

Hello,I wanted some more clarification on the st25r3916B chip, it is very interesting as well as cheap compared to st25r3916 and covers my needs.are they interchangeable? do they have pin to pin compatibility? the firmware has not yet been released or is it compatible with RFAL for ST25R3916?thank you very much and greetings.D.