https://devzone.nordicsemi.com/f/nordic-q-a/8500/how-to-combine-sig-uuid-service-and-user-defined-bluetooth-serviceHello I am using PCA10028 and I have written some customized service after taking help form nAn36 documents. Now I want to combine the predefined standard services like IMMEDIATE ALERT and the service defined by me with different and Uique UUID, aparten-USTelligent Community 13Tue, 04 Aug 2015 11:36:48 GMThttps://devzone.nordicsemi.com/thread/31015?ContentTypeID=1Tue, 04 Aug 2015 11:36:48 GMT137ad170-7792-4731-bb38-c0d22fbe4515:978a4a93-5e64-4047-955a-c9a3a88056b3Anders Strand<p>RK is probably right. Check the err_code returned from ble_advertising_init() inside advertising_init(), either by uart printing or a debugger. Error code 12 (decimal) means that the advertisement packet is too large. Consider moving name or UUID&#39;s to the scan response packet. See <a href="https://devzone.nordicsemi.com/question/35975/advertisement-packet-too-long/">this article</a></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/31014?ContentTypeID=1Mon, 03 Aug 2015 10:02:04 GMT137ad170-7792-4731-bb38-c0d22fbe4515:67e5bd3e-40e4-4b9b-b111-e600b34baafbRK<p>Nowhere near enough information in the question to really help but I&#39;ll hazard a guess you&#39;ve tried to add your custom service to the service IDs being advertised, have overflowed the advertising packet, received an error from the code which starts advertising and gone to the error handler.</p><div style="clear:both;"></div>