Ask questions and find answers on ST25 NFC/RFID tags and readers, including connectivity implementations and antenna design.
what is A/D register for? when i bring the st25r tag(sticker one) near the st25 nfc its value changes. And how is interrupt generated? what are the values of registers to be set in order to read a NfC tag?pseudo code for it.
Hi,For our project we are trying to read out the first 100 bytes of a ST25DV tag. This tag is inside our products which are tested in production line. The test results of these test are written inside the tag by I2C. We are building an end of line te...
Hi ST CommunityI have a ST25TV tag,The UID is E0 02 08 03 8F 65 C9 F5(8bytes)I use the board of NUCLE0-NFC08A1 and the demo in NFC6 generated by Cube MX.I can read the relevant information of the card through the SPI provided in the demo and than pr...
At the beginning of the program, I first performed a write-then-read operation on register 00 using I²C timing. I wrote 0x04 to register 00, and this worked correctly. However, when I used the same method to perform a write-then-read operation on reg...
As we've been integrating the ST25R3916 into our final hardware, there's been an issue with the Adjust Regulators command. On external supply power, the command works without any problems. On some (not all) of our battery-powered units, as tested in ...
I've been working on implementing tag emulation on my device with an ST25R3916 and have run into a problem. First - the code is currently completely separate from the tag reader code, including init, so it's not a matter of not changing modes properl...
Hi AllI am developing a simple app for a bespoke board using the ST25R3911B, that just has to poll for an ST25DV04KC Type 5 tag, and read/write using NDEF. I'm using STM32CubeIDE, adding NFC to an existing project that uses FreeRTOS, and already has ...
We make a credit-card size Data Acquisition device which transfers data over Bluetooth to our iOS or Android App running on a phone which can be optionally attached to the phone. The device has a PIC Microcontroller with an I2C interface and is powe...
We are using the NFC Tag Chip ST25DV04K & ST25DV64K for a customer project. The NFC Antenna is on the same PCB as the Tag Chip. Variant with ST25DV64K, Antenna Size approx 19x44.5mm Variant with ST25DV04K, Antenna Size approx 66.75x24.5mm The antenna...
Hello,I am trying to use RF with iOS and Android to write into the memory of the ST25DV04KC. Reading is not a problem, but the difficulty is the protection. There are two areas: Area 1 is only used for the NDEF message and is locked with Password 1. ...