https://devzone.nordicsemi.com/f/nordic-q-a/19699/mesh-sd_ble_gatts_hvxFirst of all I appreciate your help.I am using mesh example in https://github.com/NordicSemiconductor/nRF51-ble-bcast-mesh link .I can send data by providing connection with the phone by using NRF_Connect application. but how can I send data with DK_Boarden-USTelligent Community 13Wed, 15 Feb 2017 14:12:14 GMThttps://devzone.nordicsemi.com/thread/76630?ContentTypeID=1Wed, 15 Feb 2017 14:12:14 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5467dfaa-b0d4-4c15-9444-701a8de1a007J&#248;rgen Holmefjord<p>I&#39;m not sure I understand what you mean. Do you want to use a DK board to connect to a mesh BLE gateway node to controll the mesh? I.e., replace your phone with a DK? Could you describe your setup in more detail? <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s132.api.v3.0.0/group___b_l_e___g_a_t_t_s___f_u_n_c_t_i_o_n_s.html#ga313fe43c2e93267da668572e885945db"><code>sd_ble_gatts_hvx()</code></a> is used by the peripheral to update a value in the GATT table and notify/indicate to the connected client (central) that there is a value change. If I understand you correctly, you want the central side to write to the GATT table. For this you should use <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s132.api.v3.0.0/group___b_l_e___g_a_t_t_c___f_u_n_c_t_i_o_n_s.html#ga90298b8dcd8bbe7bbe69d362d1133378"><code>sd_ble_gattc_write()</code></a> function.</p><div style="clear:both;"></div>