I am quite unexperienced with the NFC technology, so I kindly ask for your help. We are working on a smart poster project, and we currently trying to add an NFC module to it, where URLs were stored and could be accessed by mobile phones. We can not use a simple passive NFC tag, because the content should change dynamically with the ad on the poster.
I have read many flyers and tech documents about NFC hardwares, however, I am still not sure which one to use. What we need, is an NDEF compatible device with storage capabilities and a usb/rs232 interface to receive instructions from our host system.
Could you provide me with any information which may help to choose the correct technology to our project?
Furthermore: I have an idea for an easy solution. A simple usb NFC reader/writer + a passive NFC card attached to it. The host system could modify the content of the card using the writer, and the mobile phone could read the updated url from the card. Could this system work well in practice? Isn't that possible, that the concurrent reading/writing causes some kind of interference in the communication?