https://devzone.nordicsemi.com/f/nordic-q-a/64632/nrf52-failed-to-discover-a-service-while-nrf-connect-could-find-itHello all, we faced a problem discovering a specific service while using SDK from (12 to 16) and devices (nRF52,nRF51) the problem is that the peripheral responses with &quot; Attribute Not found &quot; when the central sends &quot; find by type value request &quot;en-USTelligent Community 13Mon, 10 Aug 2020 12:59:37 GMThttps://devzone.nordicsemi.com/thread/263833?ContentTypeID=1Mon, 10 Aug 2020 12:59:37 GMT137ad170-7792-4731-bb38-c0d22fbe4515:604c1d8b-d924-408f-aa49-e3d928d46ffbVidar Berg<p>Hello,</p> <p>Does your project include the Peer manager module (or support bonding)? If not, please check if the BLE_GATTS_EVT_SYS_ATTR_MISSING event is being handled in your application as shown by the MSCs here: <span><a title="GATTS System Attributes Handling: Unknown Peer" href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s132.api.v7.0.1/group___b_l_e___g_a_t_t_s___s_y_s___a_t_t_r_s___u_n_k___p_e_e_r___m_s_c.html?cp=4_7_3_1_2_4_3_17">GATTS System Attributes Handling: Unknown Peer</a></span>. You can also take a look at the ble_app_uart example to see how this event handled.</p> <p>Best regards,</p> <p>Vidar</p><div style="clear:both;"></div>