https://devzone.nordicsemi.com/f/nordic-q-a/56188/general-question-about-the-gatt-concept-of-control-pointI think my question is a general question about the BLE GATT concept of &quot;Control Point&quot;. 1- A control point is a special characteristic. 2- A control point is a characteristic which aim is to written by a client to update a server. So through a controlen-USTelligent Community 13Mon, 06 Jan 2020 12:57:29 GMThttps://devzone.nordicsemi.com/thread/227669?ContentTypeID=1Mon, 06 Jan 2020 12:57:29 GMT137ad170-7792-4731-bb38-c0d22fbe4515:738d4b4e-e136-4d3a-ad09-e8011a3a6bfcKenneth<p>Hi,</p> <p>You likely want to look into <span>GATTS Write Request with Authorization</span>:<br /><a href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s132.api.v6.1.1/group___b_l_e___g_a_t_t_s___w_r_i_t_e___r_e_q___a_u_t_h___m_s_c.html?cp=4_5_2_2_2_4_3_21">https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s132.api.v6.1.1/group___b_l_e___g_a_t_t_s___w_r_i_t_e___r_e_q___a_u_t_h___m_s_c.html?cp=4_5_2_2_2_4_3_21</a>&nbsp;</p> <p>As an example you can look at&nbsp;\nRF5_SDK\examples\ble_peripheral\ble_app_gls\ in specific in&nbsp;ble_gls_init() for init of characteristic:</p> <p><img src="https://devzone.nordicsemi.com/resized-image/__size/640x480/__key/support-attachments/beef5d1b77644c448dabff31668f3a47-8a55b643f6144b2d8b2cba4dc9bae515/pastedimage1578315158514v1.png" alt=" " /></p> <p>For usage look at implementation of on_rw_authorize_request() on&nbsp;BLE_GATTS_EVT_RW_AUTHORIZE_REQUEST event in&nbsp;ble_gls_on_ble_evt().&nbsp;</p> <p>All the above is found in ble_gls.c.</p> <p>Best regards,<br />Kenneth</p><div style="clear:both;"></div>