ST25 NFC/RFID tags and readers

Ask questions and find answers on ST25 NFC/RFID tags and readers, including connectivity implementations and antenna design.

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Segmentation fault on GPO example

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...

myso by Visitor
  • 29 Views
  • 1 replies
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Resolved! St25R200 as non NFC LSK receiver

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 ...

Resolved! ST25R3916B no any tag response

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...

vlad_04 by Associate
  • 174 Views
  • 3 replies
  • 1 kudos

ST25DV04KC Small PCB Antenna Inductance

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...

Shahrezau1_0-1757863301164.png

ST25R3916B read range for ISO14443A tag

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 ...

Dilip_0-1757470139327.png Dilip_1-1757470221757.png Dilip_2-1757470382375.png
Dilip by Associate III
  • 396 Views
  • 4 replies
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STEVAL-25R20SA Eval kit won't respond

Hi, Every time I try to connect the eval kit to the GUI I get this error:This board doesn't reply properly to connect !Can anyone tell me how to solve this problem.  I have made sure that the correct COM Port and baud rate is selected. Also, the powe...

hfarooqui by Associate II
  • 543 Views
  • 11 replies
  • 0 kudos