ST25 NFC/RFID tags and readers

Resolved! Is it possible to use non-blocking SPI drivers to setup RFID comms using the ST25R3911B and STM32L496 MCU

Hardware Setup: MCU: STM32L496ZG (Nucleo- L496ZG board) connected to ST25R3911B over SPI, tag is ISO15693 compliant Software: Using the rfal library and the iso15693 APIs in en.STSW-ST25RFAL001 (V2.1.2)IDE: Atollic TrueStudio V9.3.0Is it possible to ...

Resolved! Problems with SPI communication with ST25R95

Hi,We are facing a lot of problems with the SPI communication with an ST25R95 device. We are using as a main CPU an Silicon Labs EFR32MG13 with the next configuration: config.master    = true;      // master mode config.baudrate   = 1000000;      // ...

Resolved! Using X-CUBE-NFC3 with STM32L475 custom board and SPI2 instead of SPI1

For my first foray into the STM32 world I've been trying to get to read nfc tags with a STM32L475 and ST25R95 custom board. It is taking me a while to get used to the CUBE IDE, since including libraries many times results in errors, specially since I...

Resolved! How to use ST25R3911B for long reading distance(40cm)

Hello,I am new to NFC solutions and want to design a product that can read tags for 40cm distance with ST25R3911B , could you give me some suggestions ? And how to adjust the antenna driver output resistance (register 0x27) to match the impedan...

Resolved! Problem of ST25R3911 ERR_RF_COLLISION

I used ST25R3911 and ST25DV16K for nfc.​I frequently get an error message about ERR_RF_COLLISION from rfalST25xVPollerFastReadMessage.​What is the problem?​As far as I know that RF_COLLISION is happened when the NFC reader has multiple NFC Tags nerab...

Resolved! M24LR04 energy harvesting shuts down with certain phones

We are evaluating the M24LR04 for a specific application where energy harvesting is required. We have configured the energy harvesting mode 3 to ensure that it will attempt to continue to harvest with low magnetic field strength. However, we regula...

Resolved! What does a Security Status = 63 mean when reading a single block from a RFID tag using the ST25R3911B and ISO-15693?

Hi,Hardware Setup: MCU: XMC4200 (infineon) connected to ST25R3911B over SPI, tag is ISO15693 compliantSoftware: Using the rfal library and the iso15693 APIs in en.STSW-ST25RFAL001 (V2.1.2)I am able to successfully read the inventory, write a single b...

Resolved! About the receiving circuit of EVAL. What should I connect to the antenna?　CIR or Coupler. Is LNA unnecessary?

In Figure 2 of st25RU3993 DateSheet, the CIR is used in front of the antenna, but the coupler is used for T4 of EVAL.I think if I want to use carrier cancellation, ​the Coupler needs to be used.Which one is recommended?​​Is LNA unnecessary?​Does addi...

Resolved! Hi, I'm using ST25DV04K. I'm trying to write 16 Bytes in System Configuration Area, but after two Bytes of the stream I get a NACK from the device. Instead, if I write two Bytes at a time, it works and I can write everything... Suggestions?

Resolved! Using CR95HF in tag detect mode

Hello,I am trying to use the CR95HF chip in tag detect mode. I am communicating with the chip over UART and am trying to save power by putting the chip into tag detect mode so it will only wake up when a tag is detected.However, in case of a system ...