reading and writing RFID messages AS TAG

ilans · ‎2016-07-05

Posted on July 05, 2016 at 12:28

Hello,

I've read product descriptions and FAQs, but still not clear about whether certain products offer me what I need.

I'm interested in a product that consists of an MCU and an antenna, which allows me to read and write RFID messages. as a tag

The typical usecase is:

1. the antenna alerts me of an incomming message

2. I send a response. the response is sent exactly as I ordered - no self-added CRC or the likes.

A big plus would be that the identification process is not done automatically, but I receive each message and respond to it myself.

Can an ST product offer me this functionality? In which product?

Thanks!

Rene Lenerve · ‎2016-08-18

Posted on August 18, 2016 at 10:38

Hello seeder.ilan,

The dynamic NFC memories are dual interface EEPROM, you need an MCU to communicate through i2c to access the EEPROM.

1. A product that is close to your application is the M24SR with GPO pin that can generate an interruption on the MCU (see

for GPO feature)

2. With the M24SR you'll need to write the response in the EEPROM and then read it with a reader.

Hope this help you.

Kind Regards.

Rene Lenerve · ‎2016-08-18