Does ST NFC readers have an emulation mode to behave like a tag?

[DS.4]

Hi,

I am interested in a device that can do both, read and be read.

[DS.4]

Have a little bit more info now.

We will be using the tag only - ST25DV04K. Would like to establish as you said a general purpose peer to peer communication between the tag and a reader. ( Is that what you referred to as a mailbox?)

Regarding the reader, Is the  ST25R3916 still a good recommendation ? Does it come with some sort of pc tool? Is there an example for p2p communication with an X-NUCLEO-NFC04A1? ( on a NUCLEO board with stm32wb55) , and finally Is it similar to ST25DV04K in emulation tag mode?

[Ulysses HERNIOSUS]

Hi,

Well peer to peer is as it says - between two same/similar devices. Maybe you rather mean bi-directional? Of course ST25R3916 and an ST25DV04K can communicate bi-directionally through the mailbox of the ST25DV. Please consult the DS of the ST25DV for details about its mailbox.

ST25DV04K does not support a tag emulation mode as it is already a tag, with its mailbox it builds a dynamic tag for bi-directional communication. Tag emulation refers to reader chip which additionally support a mode where they can behave like a tag.

Please check the different demos available for ST25R3916 (or the newer ST25R3916B).

I would like to recommend to you studying especially the FTM demo inside ST25Embedded NFC lib (an5512-st25-fast-transfer-mode-embedded-library-stmicroelectronics:( It showcases exactly above mode X-NUCLE-NFC06A1 communicating with X-NUCLEO-NFC04A1.

Unfortunately only for STM32L476 and not the STM32WB55 but porting should not be difficult.

Best Regards, Ulysses

[DS.4]

In case the reader will be an android device, is there any specific protocol/configuration I must use with ST25DV04K?

Was curious about a peer to peer passive connection, is that something you have an example for?

[Ulysses HERNIOSUS]

Hi,

the real P2P (NFC Forum Active/Passive Communication Mode with NFCDEP, LLCP and SNEP is basically dead.

If you want bi-directional Android <-> ST25DV comm then this will only work by having a dedicated app on Android being open. The Android app can fill and empty the mailbox on ST25DV.

I think that the ST25 Android app has an example for handling the FTM.

Best Regards, Ulysses

[DS.4]

Can you please explain the middleware / libraries used by the ST25FTM?

Found this project: https://www.st.com/en/embedded-software/x-cube-nfc4.html

are they the same?

Regarding ST25R3916 DiSCO, couldn't find it in stock.

But after watching https://www.youtube.com/watch?v=1hyIbbKycAg&ab_channel=STMicroelectronics I was wondering if ST25R3911B nowadays still a valid option to test FTM ?

And if you could provide the source code for: https://www.st.com/content/st_com/en/products/embedded-software/st25-nfc-rfid-software/stsw-st25003.html?icmp=tt13596_gl_lnkon_dec2019

(android and discovery). I am not getting a response for my request.

[Ulysses HERNIOSUS]

Hi,

x-cube-nfc4 is essentially the same but probably a little bit older code base.

ST25R3911B can also be used with FTM (ST25 Embedded Nfc lib provides demo projects (for nfc5<->nfc4).

Not sure if the cryto demo is available in source. If so you will need to go through official channels.

Ulysses