https://devzone.nordicsemi.com/f/nordic-q-a/1535/modifications-on-advertising-initializationHello, I try to modify the advertising initialization to advertise only my custom service (BTS_UUID_SERVICE ). Objective is to hide (just during adv) others sig services. I tried different things ( with and without scan response, with differenten-USTelligent Community 13Thu, 06 Feb 2014 16:27:44 GMThttps://devzone.nordicsemi.com/thread/6819?ContentTypeID=1Thu, 06 Feb 2014 16:27:44 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9c4afd1b-9176-4593-adf9-9791befedbbdOle Morten<p>Could it be that m_bts.uuid_type have not been set at the time of advertising_init()? If so, you&#39;ll get NRF_ERROR_INVALID_PARAMS back from ble_advdata_set(), which you can easily see by following the suggestion <a href="https://devzone.nordicsemi.com/index.php/debugging-techniques-adding-custom-profile-services#reply-4772">here</a>.</p> <p>If this is the problem, you can most likely fix it by changing the order of services_init() and advertising_init() in main, assuming that the call to sd_ble_uuid_vs_add() gets called from services_init().</p><div style="clear:both;"></div>