nRF52 write NFC Tag

[Alex]

Hi,

I am not yet familiar with NFC and have a question about using NFC with the nRF52.

If I understood it correctly the nRF52 is a "listening device" i.e. it cannot generate a NFC field and write data to another device. But is it possible to send/write data from another device (for example a smartphone) to the NFC tag of the nRF52. Or is it only possible to read data from the tag? If it is not possible at the moment will it be possible in the future?

I am using a nRF52 development kit with nRF5 SDK 11.0.0-2.alpha.

Thanks, Alex

[Eirik Midttun]

nRF52 lets you implement an NFC tag which is a passive device and, as you say, cannot generate a field. A device (or poller, typically a phone or payment terminal) can read and write to a tag.

The library in the SDK is read only (at the moment), so you what you can do is to define the data in your application and a polling device can read it. The nRF52 is capable of supporting write, and it is possible to implement it. However, read only supports the majority of the use cases and avoiding writes save quite a bit of the flash memory.

[Eirik Midttun]

@CR: It is possible to write to the tag, what is missing is software support in the SDK. You have the possibility of writing the software yourself; see the nRF52 series product specification for hardware features, and the specifications for Tag Type 2 for the software. You can also implement Tag Type 4, but that will be more complex.