Ask questions and find answers on ST25 NFC/RFID tags and readers, including connectivity implementations and antenna design.
Hello everyone,I just received the STEVAL-25R200A evaluation kit and I have a few doubts.1. Can I connect this board directly to another MCU?2. If yes, are the SPI pins available on the PCB?3. I found that the board uses an STM32G0B1KEU. Should I dev...
Hi I am evaluating NFC function on your STEVAL 25R3916B board, but I would like to see how it works with the I2C interface. Currently, the default configuration is SPI.I have downloaded STM32CubeIDE and STEVAL-25R3916B_V2.1.0 project code, but am not...
Hi,The ST25DV supports I2C speeds upto 1MHz, for which the datasheet has mentioned the rise and fall time using the RC time constant of <150ns according to I2C standards.We are using it at 100kHz only but there is no mention of rise and fall time for...
Hello,I am using the ST25R3916B reader on a custom board to read NFC-A cards. I first experimented on the X-Nucleo-nfc08a1 expansion board connected to esp32-s3 devkit. I modified the RFAL library a bit to fit my needs and kept most registers at thei...
I am using ST25DV04KC tag and using the V_EH pin to power the VCC of the tag only( It will generate around 3.3V which is enough to power up the tag in I2C mode I believe) . I am looking for guidance on the maximum pullup voltage on the I2C and GPO li...
Hi,I need to write the same kind of NDEF data to ~20 different NFC stickers placed on a panel. The idea is to have ~20 small antennas, select one at a time, and write to the sticker sitting above that antenna.Questions:Can I do this with X-NUCLEO-NF...
Hello,I hope this is not a duplicate but I didn't find a similar issue.I'm developing for my company an Android app using the STSW-ST25SDK001 - Software Development Kit for ST25 Tags and Dynamic Tags (https://www.st.com/en/embedded-software/stsw-st25...
Hello @all, I've downloaded ST25DVCryptoDemo for iOS from here, in order to take a look into the demo code for a new project.Once I've tried to build the Demo app I've got a big amount of errors. In fact the console gave me this message "too many err...
Hello ST Community,I am using a STEVAL-25R200A to do tests with the ST25TV02KC.I am trying to rfalST25xVPollerPresentPassword, with a pwdNumber of 0x00 to enter Configuration Session (As described in the nfc tag datasheet), But keep getting error 5, ...
Hello and thanks for reading. We are using the M24SR02 and are having a problem where, when the length of the payload is exactly 31 characters, we cannot read the payload with a phone or other device.We tested both with our hardware and the dev board...