Is there any peripheral sample for OOB legacy pairing?

Hi Wang

Yes, the nRF52 series all support legacy OOB pairing. The authentication key is generated like this in the NFC examples that uses legacy OOB for example. 

{
                // Generate Authentication OOB Key and update NDEF message content.
                uint8_t length = random_vector_generate(m_oob_auth_key.tk, BLE_GAP_SEC_KEY_LEN);
                random_vector_log(length);
                err_code = nfc_tk_group_modifier_update(&m_oob_auth_key);
                APP_ERROR_CHECK(err_code);
            }

I'm not sure what you refer to with LP_CONFIRM_R as that's not mentioned in the entire SDK as far as I can see?

Best regards,

Simon

Hi Simon,
Thank you for your courteous reply.
I recognize that the attached code only generates TK and writes the information in the NFC tag and is not used in the pairing process. Is it correct?
I wanted to know how to realize the part of the red frame.

Best regards,
wang

Hi Simon,
Thank you for your courteous reply.
I recognize that the attached code only generates TK and writes the information in the NFC tag and is not used in the pairing process. Is it correct?
I wanted to know how to realize the part of the red frame.

Best regards,
wang