Ask questions and find answers on ST25 NFC/RFID tags and readers, including connectivity implementations and antenna design.
Hello,Murata has announced that the variable capacitors LXRW0YV201-059 will become obsolete in 2026.https://www.mouser.com/PCN/Murata_PCN_for_Mouser_(LXRW)_Mar._6_2025.pdfThese components are part of the antenna matching/EMI filter circuit in the STE...
Hi,I'm using an ST25DV64KC tag to communicate with an Android app using the st25 sdk and the Mailbox. The problem arises when the app reads a message of the maximum mailbox capacity. In that case, an 0xE4 character appears as the last character but I...
I have connected the STEVAL-25R200SA via micro-USB to the computer however the device is not identified. Is there any virtual com port driver needed for this and if so can someone provide what it is that I am missing.
Dear..STI'm developing custom NFC PCB 4 layers 0.8mm based on 20x20mm main antenna example in STEVAL-25R200SA kit.I tried to use the components in BOM for EMC filter L 0402DF-421XJRW 420nH 510mOhm and adjust frequency to18MHz and get EMC capacitor 1...
Hi.I'm porting the RFAL for NFC10A1 using ST25NFC_Embedded_Lib_ST25R200_1.7.0.I'm using the polling example. I have ported SPI, GPIO, and timer drivers based on my platform. I am using demo_polling.c as a basic template for my init and while loop fun...
When evaluating the st25R3916b chip using the X-NUCLEO-NFC08A1 development board, we found that the current reached about 100-150ma during the nfc reading and writing process. However, we did not find the standard value for this part of the current i...
I am working with an ST25R3916b, utilizing the RFAL library. I am trying to work with a card that does not always send back a CRC over NFC, so I need to be able to disable the CRC RX checks dynamically. My txrx function looks like:static int st25r_nf...
Hi,I am currently working with the X-NUCLEO-NFC08A1 as reader another PCB with a stm32 microcontroller and a ST25DV04K tag. I don't have access to the source code of the board with the tag but i know the used protocol to interact with it.I got everyt...
Hi all.We are evaluating the use of ST25R3911B on production line in order to communicate with our metering product which embeds STM32U5 and ST25DV.We'd like to customize STSW-ST25R001 firmware for ST25R3911B-DISCO board to our needs but the provided...
Dear Community, I am currently facing an issue related to locking an NFC tag after writing data to it. By "locking," I mean making the tag's data read-only, so that once the data is written, it cannot be modified or overwritten. The contents of the t...