ST25 NFC/RFID tags and readers

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

cancel
Showing results for 
Search instead for 
Did you mean: 

Forum Posts

Resolved! Transmitted power of ST25R3916.

Hi,I am using ST25R3916 to make an RFID reader, but I don't know how to calculate the transmit power of its antenna. I am using a differential antenna design, as shown in the figure below:Hope to get somebody's support.best regards,Lingfu

0693W00000GWHCvQAP.jpg
LLi.3 by Associate
  • 520 Views
  • 1 replies
  • 0 kudos

Resolved! st25r3916 driver for using external mcu(ESP32)

Hi !I use st25r3916 and esp32 for i2c or spi communication on my custom board.​I'm referring to the st25r3916 i2c, spi driver related documents and codes from the link below.​https://www.st.com/en/embedded-software/stsw-st25r-lib.html#documentation​A...

Jkim.7 by Associate II
  • 1945 Views
  • 2 replies
  • 0 kudos

Resolved! ST25R3916 using AAT and Hardware wake-up

Hi, I have a issue with the ST25R3916 when using the AAT and the Hardware wake up functions together. The tuning works fine and finds the best parameters, then when entering sleep mode the parameters changes to a fixed value. When waking up the first...

0693W00000FB0orQAD.jpg 0693W00000FB0pVQAT.jpg 0693W00000FB0ppQAD.jpg
COles.1 by Associate
  • 1064 Views
  • 4 replies
  • 0 kudos

Resolved! I am using ST25R3911DISCOComm.dll and the lib in a QT application. Using MSVC 2019 32-bit configuration I am able to get my application running using the 'Debug' sub-configuration only. If I use the 'Release' the application crashes immediately.

I am using ST25R3911DISCOComm.dll and the lib in a QT application. Using MSVC 2019 32-bit configuration I am able to get my application running using the 'Debug' sub-configuration only. If I use the 'Release' the application crashes immediately. My s...

TOzya.1 by Associate II
  • 1059 Views
  • 5 replies
  • 0 kudos

Resolved! Automatic antenna tuning (AAT) technique on NFC06A1

Hi, I want to reconfigure the TX Power from transmitter to receiver. How to adjust my code to control automatic antenna tuning (AAT)? For example, I can increase the TVDD to max value which is the power supply of the tx driver, and which part of the ...

TZhou.2 by Associate II
  • 1219 Views
  • 5 replies
  • 0 kudos

Resolved! Frequency shift as a consequence of metal presence

Hello to all,I would like to know what considerations and calculations i have to do to know the frequency shift as a consequence of the metal presence near the NFC/RFID antenna tag and also it is dependent of metal type and size of the tag. Thank you...

ASant.6 by Associate II
  • 1032 Views
  • 4 replies
  • 0 kudos

Resolved! Questions about ST25DV16 + Nordic 52832

Hello,I'm using adafruit ST25DV module with Nordic 52832 as host MCU, and porting the code to host bases on the ST25DV_DISCOVERY_FW_V1.1.2 demo, then encountered below issues:1) In the demo, after enabling FTM, host MCU will keep monitoring the it st...

KLam.11 by Associate II
  • 2166 Views
  • 15 replies
  • 0 kudos

Resolved! energy efficiency on NFC06A1 board

Hi, As I want to measure the energy efficiency on the NFC06A1 board. Could you provide the testing position of the VDD_RF pin on PCB board? And do you have a clear tutorial about your antenna auto-tuning system? The third problem is about AAT technol...

0693W00000Dn47QQAR.png 0693W00000Dn47LQAR.png 0693W00000Dn47GQAR.png 0693W00000Dn47BQAR.png
TZhou.2 by Associate II
  • 931 Views
  • 3 replies
  • 0 kudos