https://devzone.nordicsemi.com/f/nordic-q-a/43639/change-mac-address-during-advertising-in-nrf52810Hi, I want to change MAC address during advertising in nrf52810. nrf52810 receives MAC address via uart from other MCU and set this MAC address. (type is BLE_GAP_ADDR_TYPE_PUBLIC or BLE_GAP_ADDR_TYPE_RANDOM_STATIC) Sometimes other MCU transmitsen-USTelligent Community 13Thu, 14 Feb 2019 00:16:00 GMThttps://devzone.nordicsemi.com/thread/170994?ContentTypeID=1Thu, 14 Feb 2019 00:16:00 GMT137ad170-7792-4731-bb38-c0d22fbe4515:62079647-d299-40a1-8c87-d10aa7864cd5TAE<p>Thanks. it works.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/170898?ContentTypeID=1Wed, 13 Feb 2019 13:33:46 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a383cea7-8db6-485b-b9f9-83310c31f671Sigurd<p>Hi,</p> <p>It&#39;s no longer possible to change the address directly while you are advertising. Looking at the documentation for&nbsp;<span>sd_ble_gap_addr_set(), at <a href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s112.api.v6.1.0/group___b_l_e___g_a_p___f_u_n_c_t_i_o_n_s.html?cp=3_4_0_2_2_1_2_1#gaef69dc212534adf4b78d211edce2267b">this link</a>, we see that you will get the error code &quot;NRF_ERROR_INVALID_STATE&quot;, because &quot;The identity address cannot be changed while advertising.&quot;</span></p> <p>If you want to manually change the address using <span>sd_ble_gap_addr_set()</span>, then first stop the advertising, change the address, and then start the advertising again.</p><div style="clear:both;"></div>