https://devzone.nordicsemi.com/f/nordic-q-a/24851/some-question-about-bonding-and-pairingSDK： nRF5_SDK_11.0.0 Softdevice： s132_nrf52_2.0.0_softdevice project：examples\ble_peripheral\ble_app_hids_mouse\pca10040\s132\arm4 I have some questions about bonding。 (1)What&#39;s the difference between BLE_GAP_EVT_SEC_INFO_REQUEST and BLE_GAP_EVT_SEC_PARAMS_REQUESTen-USTelligent Community 13Fri, 01 Sep 2017 13:53:39 GMThttps://devzone.nordicsemi.com/thread/97869?ContentTypeID=1Fri, 01 Sep 2017 13:53:39 GMT137ad170-7792-4731-bb38-c0d22fbe4515:963c3d21-e776-4691-9e0c-534dabe0eeb9Hung Bui<p>Hi HDU,</p> <p>If you have a look <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s130.api.v2.0.0/group___b_l_e___g_a_p___p_e_r_i_p_h___b_o_n_d_i_n_g___j_w___m_s_c.html?cp=3_7_2_1_1_2_1_3_8_7_0">here</a> and <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s130.api.v2.0.0/group___b_l_e___g_a_p___p_e_r_i_p_h___e_n_c___m_s_c.html?cp=3_7_2_1_1_2_1_3_8_5">here</a>.</p> <p>You will find the difference between the 2 events. One is to get the parameter for pairing, one is to get the bond information to re-establish encryption using stored case (reconnect after bond).</p> <p>2.For your purpose, when you receive BLE_GAP_EVT_SEC_PARAMS_REQUEST, in your application you can delay and wait for the button to be pressed before you send sd_gap_sec_params_reply(). If after 30 seconds the button is not pressed, there will be a timeout.</p><div style="clear:both;"></div>