https://devzone.nordicsemi.com/f/nordic-q-a/11027/how-to-achieve-advertising-without-scanresponseHi, I set advertising data as follows: err_code = ble_advdata_set(&amp;advdata, NULL); But I can&#39;t achieve advertising without ScanResponse，could you give me some suggestions. BRen-USTelligent Community 13Fri, 25 Dec 2015 00:07:12 GMThttps://devzone.nordicsemi.com/thread/41234?ContentTypeID=1Fri, 25 Dec 2015 00:07:12 GMT137ad170-7792-4731-bb38-c0d22fbe4515:36991489-ccc7-49a7-b6d8-7425a6bcc42fRK<p>What do you mean you &#39;can&#39;t achieve advertising without a scan response&#39;? You want a scan response, you don&#39;t want one? You don&#39;t want the central to send you a scan request at all and it is even though you don&#39;t have any data to send it? What are you asking here?</p> <p>Most advertising modes you&#39;d commonly use allow, or even require, the central to send a scan request even if that returns an empty response, is that what you&#39;re trying to stop?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/41235?ContentTypeID=1Thu, 24 Dec 2015 13:57:27 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8597636a-5348-469d-918c-2cbffa3e5efdMichael Dietz<p>Look at this if you haven&#39;t: <a href="https://devzone.nordicsemi.com/tutorials/5/">devzone.nordicsemi.com/.../</a></p> <p>A scan response will be useful if you have more than 31 bytes of data to send. What error code is ble_advdata_set(...) returning? I beleive if it returns 0x0C then that means you are passing too much data to it in advdata. otherwise you might have a different problem. try shortening the device name for a quick check. and not sending too many uuids.</p> <p>including more of your code in advertising_init() will be helpful for answers. also note that services_init() should be called before advertising_init() in your main.c if you are using a custom (or vendor specific) service</p><div style="clear:both;"></div>