Any plans to add Write capability to the NFC library?

[CurtisHx]

Are there any plans to add write capabilities to the NFC driver? The hardware supports it, but the library provided by Nordic does not (as far as I know). Are there any plans to add write support to the NFC library? Or do we just need to pony up the $$$$ to the NFC Forum for the spec(s)?

And if we do just need to buy the spec(s) which one(s) would we need to implement read/write capability on the NFC module?

[Jørgen Holmefjord]

Hi,

As most common use-cases can be achieved using NFC tag read, write functionality have not been implemented yet. Unfortunately, I cannot say anything about if or when this will be added to the NFC library.

The harware supports it, like you say, so it's possible to implement write functionality yourself. Check out this post from @thln. There are also some links in the comment that might be usefull.

Best regards,

Jørgen

[CurtisHx]

Rats. I have a use case that would make writeable NFC much handier. Our nRF52 - based devices get sealed in epoxy and are essentially disposable. Once the battery runs out, they're done. So we turn everything off except for the NFC module. What I would love to do is require a "key" to be transferred over NFC to make the device wake up fully. If that key isn't written, then the device turns off again. In addition, being able to have bidrectional extremely low power communication (well, the 52's standpoint) would be FANTASTIC for sending a few bytes of data without having to fire up the full BLE stack.

Since the device is disposable, every single uA counts for squeezing out battery life.