BLE - NFC

RE: BLE - NFC

Hung Bui — Thu, 27 May 2021 14:17:05 GMT

No, the NFC can only transfer very limited amount of data with very low speed. I'm not aware of any way you can put software to do anything on the NFC peripheral.

RE: BLE - NFC

Roei — Wed, 26 May 2021 15:09:21 GMT

Is that possible that the NFC pad contains a SW which sends the connection request or doing other stuff?

RE: BLE - NFC

Hung Bui — Wed, 26 May 2021 14:24:18 GMT

The NFC only act as a way to wake the device up and advertising. It's up to the central device (mobile phone or PC) to do what's next, for example send a connection request.

RE: BLE - NFC

Roei — Wed, 26 May 2021 13:03:41 GMT

Hi,

I just want to understand the process, and I have some things that I don't understand.

When start advertising and connecting via mobile - I know that the mobile should recognize the device and send a connection request, and that the NRF device waits for connection requests while advertising.

But what happens when connection to a PC via NFC? After NRF device starts advertising - should the PC asks for a connection request?

Thanks!

RE: BLE - NFC

Hung Bui — Wed, 26 May 2021 12:52:32 GMT

Hi,

What exactly you plan to do ?

I would suggest just to leave the handshake and key exchange to the softdevice and the peer manager module.
You can have a look at the message sequence charts here.

RE: BLE - NFC

Roei — Wed, 26 May 2021 12:46:54 GMT

Thanks! It helped me a lot.

In addition - can you please send me the sequence of the flow - including handshake, diffie hellman key exchange etc?

Thanks!

RE: BLE - NFC

Hung Bui — Tue, 25 May 2021 14:33:42 GMT

Hi Roei,
Please have a look at this example located in nRF5 SDK v17.0.2 : examples\ble_peripheral\experimental\ble_app_hrs_nfc_pairing

Documentation:

https://infocenter.nordicsemi.com/topic/sdk_nrf5_v17.0.2/ble_sdk_app_hid_keyboard_pairing_nfc.html?cp=7_1_4_2_2_33

It does exactly what you want to do.