Demo CR95HF-A ISO 15963 max range

[pieretti]

Posted on January 23, 2014 at 11:23

Hi,

I'm trying to achieve the maximum reading range from my demoboard CR95HF-A with a ISO 15693 tag (LRi2K). Until now I've obtained best results with modulation-index 10% and gain 34dB by writing 0x50 to ARC_B register: only 5 cm.

Can I improve this result? How Can I increse the antenna current?

Thanks in advance.

#range #lri2k #lri2k #lri2k #lri2k #lri2k #demo-cr95hf-a #cr95hf-firmware #cr95hf

[Anais GALLIGANI]

Posted on January 23, 2014 at 14:35

Hi Andrea,

Thanks for the interest in our line of product,

In order to help you further, I have a bundle of questions, sorry about that,

- What is the size of your tag? 

- Is the reader : DEMO-CR95HF-A  

MB1054A ?

- What is the answer to IDN ? 

Thanks,

ST NFC/RFID Dynamic support

Hi,

I'm trying to achieve the maximum reading range from my demoboard CR95HF-A with a ISO 15693 tag (LRi2K). Until now I've obtained best results with modulation-index 10% and gain 34dB by writing 0x50 to ARC_B register: only 5 cm.

Can I improve this result? How Can I increse the antenna current?

Thanks in advance.

[pieretti]

Posted on January 24, 2014 at 09:26

First of all, thank you for your quick reply.

These are the answers:

- What is the size of your tag? I'm using a

http://www.st.com/st-web-ui/static/active/en/resource/technical/document/datasheet/CD00092187.pdf

2x3 mm2 inside a card: it came with the demoboard.

- Is the reader : DEMO-CR95HF-A   MB1054A ?

http://www.promelec.ru/pdf/DEMO-CR95HF-A.pdf

- What is the answer to IDN ? NFC FS2JAST0

[Anais GALLIGANI]

Posted on January 24, 2014 at 16:22

What is the size of the tag's antenna? (sorry my question was confusing)

You have an old eval board, I suggest you to get a M24LR-discovery. Several options are possible :

1. buy it form distributors

2. You can request it to your ST 's sales.

1. If you want you can contact me through moderator 's case of this forum.  Or let me your email.

    

[pieretti]

Posted on January 27, 2014 at 14:27

The tag is inside a card: I don't know the real antenna size.

Which antenna size is recommended to achieve the best range with my demo board?

[Anais GALLIGANI]

Posted on January 28, 2014 at 09:18

Hello Andrea,

Just to be sure, might you send a picture of the tag please?

thanks

[Anais GALLIGANI]

Posted on January 28, 2014 at 11:39

Also if it is a ISO Tag embedded in the card,

Read range should be more like 8 cm.

Have you ordered a new evaluation kit?

[pieretti]

Posted on January 28, 2014 at 15:58

Hello,

these are the picture you requested.

For this card, which are the best CR95HF settings to achieve the longest working range?

Which are the differences between my CR95HF demoboard and M24LR transceiverboard?

Thanks for your support

[Anais GALLIGANI]

Posted on January 29, 2014 at 11:45

Ciao Andrea,

Yes, with the tag you got, read range is more around 8 cm. 

Difference betweend M24LR RF tranceiver board and DEMO-CR95HF-A , 

- EMI filter is present on the RF tranceiver board , http://www.st.com/st-web-ui/static/active/en/resource/technical/document/application_note/DM00089926.pdf

- better matching impedance, about that , there is an application note, http://www.st.com/st-web-ui/static/active/en/resource/technical/document/application_note/DM00027198.pdf

I hope you get better result with the board, let us know :)

Have a nice day,

ST NFC/RFID dynamic support

[pieretti]

Posted on February 11, 2014 at 12:42

I've ordered the new Demoboard: I'll try my tests with this new hardware.

Thanks

[pieretti]

Posted on February 14, 2014 at 18:01

The M24LR-Discovery demo has arrived. For what is concerning to the CR95HF board, I'm achieving the same results. So I've decided to go further.

Where I can found the firmware source code for the SM32F103 of CR95HF board? It will be very usefull to start my own development.

Thanks