Ask questions and find answers on ST25 NFC/RFID tags and readers, including connectivity implementations and antenna design.
I have designed RFID and I am now trying to deternine the antenna parameters by followingAN4974 Antenna matching for ST25R3911B/ST25R391x devices I have bought NanoVNA-H4 for doing the measurements.But what confuses me is how to connect the RFID ante...
I drew a pcb with antenna and put st25dv on itbut i get read data error on the st appis that st25dv need to program first?or just my soldering is bad? or antenna isnt standard?the antenna is designed as this P.S. I can read the tag by other app call ...
HiI download the newest STSW-ST25RFAL 4.0.0 and try to update my project from STSW-ST25RFAL 3.0.0. In rfal_nfc.c is a new function platformTimerGetRemaining( ) used.I can't find a sample implementation because STSW-ST25R_1.7.0 is still with 3.0.0.Whe...
Hi everyone,I am working with the STEVAL-25R200SA evaluation board using the ST25R200 GUI software, and everything is functioning correctly.However, I would like to develop my own software instead.Using X-CUBE-NFC10 Middleware:Can I use the X-CUBE-N...
Hi,I'm trying to get the FTM examples from the STSW-ST25R-LIB to work on a ST25R3916.I am using the following hardware:-Mikroe NFC 4 Click Board with a ST25R3916-STEVAL-25R3916B (I only use the reader/antenna board STEVAL-D25R3916B without the Mcu bo...
Hello everyoneI am creating an application on a PC that uses an ACR1552 reader and that must read and write to a ST25 device.At the moment the data reading works and I am using the SDK of the reader manufacturer using the adpu commands.I understand t...
Hi Community,I am designing an NFC card reader using a combination of the ST25R3916B NFC frontend and the STM32L476 MCU.The ST25R3916B has four supply input pins:VDD_IO (pin 1): Connected to 3.3V for all serial communication.VDD_A (pin 7): Typically ...
Hi ST members！I have a question about FCC test settings, as the reference shows，I need set the ST25R95 in transmitting a continuously ASK modulated signal. How can I do this？I did not find any information in its datasheet thanks！
I would like to connect a 1.4uH antenna to ST25DV-I2C.The datasheet says that there is a 28.5pF capacitor inside the IC for RF interface tuning.However, when using a 1.4uH antenna, the resonant frequency shifts from 13.56MHz.How should I adjust the r...
Hello,I'm running a demo from STSW-ST25R-LIB which uses NFC-V. The Inventory poll returns RFAL_ERR_FRAMING as the SOF does not match. Also I have to push the tag really close to get this behaviour. The tag (M24LR64) should be fine as I can communicat...