https://devzone.nordicsemi.com/f/nordic-q-a/10324/discovery-bypassHello, I do connections between 2 nrf51 with a known and static services. Is that possible to bypass the discovery to access a characteristics (i know all characteristics) ? Thank youen-USTelligent Community 13Thu, 24 Dec 2015 10:32:54 GMThttps://devzone.nordicsemi.com/thread/38325?ContentTypeID=1Thu, 24 Dec 2015 10:32:54 GMT137ad170-7792-4731-bb38-c0d22fbe4515:691e2dba-8804-4813-bfd2-f4a9d95b9f4dFabien Comte<p>Hello, Thank you for your response. Where can i found the value of the handle to avoid discovery ?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/38324?ContentTypeID=1Wed, 18 Nov 2015 19:05:20 GMT137ad170-7792-4731-bb38-c0d22fbe4515:def408bc-fb25-424d-a2fe-90b4c9183276shibshab<p>Yes, you can use the handle directly if you know that they will not change.</p> <p>Use the <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s130.api.v1.0.0/group___b_l_e___g_a_t_t_c___f_u_n_c_t_i_o_n_s.html?cp=2_7_2_1_0_2_2_4_8#ga90298b8dcd8bbe7bbe69d362d1133378">sd_ble_gattc_write</a> function, and give the known handle.</p> <p>Another solution if you know the UUID, but not the handle, is to perform a <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s130.api.v1.0.0/group___b_l_e___g_a_t_t_c___f_u_n_c_t_i_o_n_s.html?cp=2_7_2_1_0_2_2_4_0#ga1e5d6f7c678b7db3205fa6b5c419f665">sd_ble_gattc_char_value_by_uuid_read</a> call to extract the handle of the UUID. This is much faster than performing a full service discovery procedur.</p> <p>Edit: In order to find the static handles you can use Master Control Panel to perform service discovery.</p><div style="clear:both;"></div>