Any plans to add Write capability to the NFC library?

RE: Any plans to add Write capability to the NFC library?

CurtisHx — Tue, 06 Dec 2016 13:04:37 GMT

YAY! Thanks for update!

RE: Any plans to add Write capability to the NFC library?

Jørgen Holmefjord — Tue, 06 Dec 2016 13:02:32 GMT

Just wanted to inform you that we have released SDK 12.2, which has experimental support for NFC type 4 tag with write support.

RE: Any plans to add Write capability to the NFC library?

Jørgen Holmefjord — Wed, 26 Oct 2016 11:47:44 GMT

I guess updated NFC libraries with write functionality will be released sometime, but I cannot guarantee this. An alternative if you do not want to add write functionality to the NFC library yourself, can be to use Wake on NFC to wakeup from sleep to turn on the radio for receiveing the code. It will probably consume a bit more current than write to NFC, but it should not affect the battery life that much. If you add DFU to your design you can also update the software to support NFC write in the future if updated libraries are released.

RE: Any plans to add Write capability to the NFC library?

CurtisHx — Tue, 25 Oct 2016 20:13:17 GMT

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.

RE: Any plans to add Write capability to the NFC library?

Jørgen Holmefjord — Tue, 25 Oct 2016 08:48:50 GMT

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