Ask questions and find answers on ST25 NFC/RFID tags and readers, including connectivity implementations and antenna design.
I am working on a React Native project for an NFC app that needs to run on both iOS and Android. I am using the react-native-nfc-manager library to perform NFC operations. The NFC tag I am using is ST25DV, which supports NDEF and NfcV (ISO15693) tech...
目前，我们正在开发一种带有圆形NFC天线的读卡器，但由于缺乏测量天线参数的设备，我们只能使用计算的理论值。目前，电路板和天线如图1所示，阻抗匹配如图2所示，仿真图如图3和图4所示。有没有办法优化天线和绘制天线，或者有没有圆形天线可用？圆形天线最小直径为42mm，最大直径为50mm
This is a custom-made PCB antenna board utilising the ST25R3911B chip, but I am unsure how to proceed with impedance matching debugging and parameter configuration. Could you offer some guidance? Below are the antenna dimensions, the calculated imped...
Hello,I am running tha example code on RPi 5 on Ubuntu. Everything compiles fine but I get a Segmentation fault. I did configure the hwconfig.hI added some debug messages to the code:int main (void) { const ST25DV_PASSWD st25dv_i2c_password = {.Msb...
Hi everyone,I'm currently working with the ST25DV04K NFC tag connected to a Nucleo board, and I need to read and write text data to the tag for application development. I'm looking for:Example code to perform text read/write operations.A middleware l...
hi all, I am planning to use a ST25R200 as non standard load shift keying receiver for medical applications. The use of the TAD1 en 2 pins could help monitoring the internals and optimize the filter and correlator settings. what are the registers to ...
Hello. I am making a custom PCB with a custom antenna and ST25R on the board.Antenna: single-ended (RF0, RF1).Bundle: Nucleo-C031C6 with STM32 for communication via I2C with my PCB.The antenna has a SWR at a frequency of 13.56MHz is about 2.2 (not id...
HiI am designing a small circular PCB with the following specifications. Due to size limitations, the antenna cannot exceed 9mm, which prevents me from achieving the recommended 4.8µH of inductance. Is it acceptable to compensate for this by increasi...
Hi, I bought ST25RU3993-HPEV and In the tag authentication menu I want to use 29167-10 as CSI and there is a field with 'keyID' parameter. I want to know what is the key which this ID is assigned to. you know, the key in the tag and the the reader mu...
Hi ST team , I have designed NFC reader using ST25R3916B with single ended antenna connected with cable. Antenna is on different PCB. I would like to read ISO1443A tags using this antenna and want to have read range of around 5 cm. Right now when i ...
