how to connect to the mesh quickly with NFC

RE: how to connect to the mesh quickly with NFC

zhengrui — Fri, 25 May 2018 13:09:08 GMT

yes,I get it and I found the definition/value of the key ,the Static "OOB" make me misunderstand.

Thanks.

Zhengrui.

RE: how to connect to the mesh quickly with NFC

Edvin — Fri, 25 May 2018 12:58:49 GMT

In the lightswitch example, the key is static, and it is found in provisioner_helper.c in the light_switch_provisioner_nrfXXXX_xxAA example.

It is possible to do this static, but that is an optional step. Static keys are typically programmed during production, but it is possible to do this dynamically. That step is called Authentication, and is optional during the provisioning process.

Best regards,

Edvin

RE: how to connect to the mesh quickly with NFC

zhengrui — Thu, 24 May 2018 14:23:30 GMT

Thanks,I have read the case and the NFC can't communicate with each other as it said even I add a NFC antenna. It just can be a tag to be scanned and can't be a source scanner.Is that right?Maybe I have a misunderstanding for NFC.

And as I asked before ,the static OOB doesn't real use the OOB method in authentication and it still use the frequency of bluetooth about 2.4G.

And what's the other methods to connect to mesh/provisioner except using NFC?

Will you reply me for these questions?

BR,

Zhengrui

RE: how to connect to the mesh quickly with NFC

Edvin — Thu, 24 May 2018 13:37:32 GMT

Both the RUUVI and the nRF has NFC -A tag.

Please see this case.

BR,

Edvin

RE: how to connect to the mesh quickly with NFC

zhengrui — Thu, 24 May 2018 11:53:22 GMT

yes it is NFC™-A tag antenna,and can I use it to complete the OOB authentication on RUUVI?

RE: how to connect to the mesh quickly with NFC

Edvin — Thu, 24 May 2018 10:22:39 GMT

What is NFC areial? Is it NFC antenna? (see this).

The RUUVI is a device using an nRF52832. It has the passive NFC, just like the nRF52 DK.

It may be that we don't completely understand each other, but what I am trying to say is that the NFC on the nRF is a passive NFC tag. (See this link). Sort of like when you have any sort of cable that has a male and a female contact, you can't connect the male contact to another male contact.

Equally, NFC has active and passive NFC devices. A connection via NFC requires at least one of the parts to be active, as described in the link above. Two passive NFC antennas can't communicate, because none of them will generate the magnetic field which the antenna uses. Only active NFC devices generate this field.

Read the article in the last link.

Best regards,

Edvin

RE: how to connect to the mesh quickly with NFC

zhengrui — Thu, 24 May 2018 03:04:15 GMT

and if the nRF don't use NFC to connect with provisioner ,what't the method of Static OOB is used in the light switch demo?maybe this is the confusion that i can't understand.

RE: how to connect to the mesh quickly with NFC

zhengrui — Thu, 24 May 2018 02:49:26 GMT

Hello,

I think I have a incomplete expresssion that make you confusion, there is another board with the additional NFC aerial (not in the nRF) just like RUUVI,and I want to use it to connect to the provisioner(the same board).

RE: how to connect to the mesh quickly with NFC

zhengrui — Wed, 23 May 2018 14:30:06 GMT

thanks for your reply ,Edvin.

RE: how to connect to the mesh quickly with NFC

Edvin — Wed, 23 May 2018 13:50:53 GMT

You can use the phone as an NFC provisioner, but you can not scan another NFC tag with the nRF's NFC antenna.

BR,

Edvin

RE: how to connect to the mesh quickly with NFC

zhengrui — Wed, 23 May 2018 12:40:06 GMT

Hi Edvin,

I saw the iOS for Mesh in gethub before,now I have some boards which assemble nRF52832 and NFC aerial. Can I regard one as provisioner to be a NFC scanner and the other as provisionees with NFC tag? So that I can spend less time on provisioning a new device .

Waiting for your reply .

Best wishes,

Zhengrui.

RE: how to connect to the mesh quickly with NFC

Edvin — Wed, 23 May 2018 12:15:04 GMT

I found this post from Apple. I am not sure where they stand on the NFC part at the moment. Maybe they have opened it up for app-developers. At least it seems like it from that link.

However, you need an active NFC scanner to use the NFC tag on the nRF. Either a phone, or an external device that you can connect to the provisioning nRF via some peripheral.

BR,

Edvin

RE: how to connect to the mesh quickly with NFC

Edvin — Wed, 23 May 2018 12:05:32 GMT

Hello,

In order to provision using NFC, you would need to have one active NFC scanner. The NFC tags on the nRFs are only the passive NFC part, so two nRFs can't communicate with one another via the NFC. You would need a phone or something to do that.

If you are interested, there is a prototype library for iOS for Mesh provisioning, which you can find here. Unfortunately, iOS is very uncomplicated when it comes to accessing the NFC, and we don't have anything on Android and mesh provisioning at the moment, as far as I am aware of.

Best regards,

Edvin

RE: how to connect to the mesh quickly with NFC

zhengrui — Wed, 23 May 2018 03:38:39 GMT

now I have read the article of "NFC library and modules" and have nrf52832 boards with NFC aerial ,coule you please give me some advice to change or add codes in provisioner and server/client?