/nordic/nordic-blog/b/blog/posts/designing-your-bluetooth-gatt-custom-services-and-One thing I wish I had when I started developing for BLE is more blog posts that walk you step-by-step on how to tackle the different phases of the system design and implementation. One such phase is designing your Bluetooth GATT: Services and Characen-USTelligent Community 13https://devzone.nordicsemi.com/nordic/nordic-blog/b/blog/posts/designing-your-bluetooth-gatt-custom-services-and-Thu, 23 Mar 2023 12:10:30 GMT137ad170-7792-4731-bb38-c0d22fbe4515:23f85a43-35d7-4c53-a29f-a72cd7ab2e55SIRINE0<p>Thank you Mohammad for the post .</p> <p>i tried the tutorial but i&#39;m having a small problem. my device is not advertising; the device doesn&#39;t show while scaning and there are no errors while executing .I don&#39;t know what might be the problem and did anyone have the same problem before?</p><img src="https://devzone.nordicsemi.com/aggbug?PostID=1027&AppID=4&AppType=Weblog&ContentType=0" width="1" height="1">https://devzone.nordicsemi.com/nordic/nordic-blog/b/blog/posts/designing-your-bluetooth-gatt-custom-services-and-Tue, 20 Feb 2018 18:42:52 GMT137ad170-7792-4731-bb38-c0d22fbe4515:23f85a43-35d7-4c53-a29f-a72cd7ab2e55StephaneJ0<p>Thanks for this detailed post ! <br /><br />But it was initially made for the SDK12.3 if I&#39;m not mistaking? It&#39;s not working with the 14.2, for example, there is no&nbsp;ble_evt_dispatch function anymore so maybe some code are missing. I got stopped by a vector catch (HardFault_Handler) at the&nbsp;SVCALL for the&nbsp;sd_ble_gap_device_name_set.<br /><br />Do you have an updated version of your tutorial that could help?</p><img src="https://devzone.nordicsemi.com/aggbug?PostID=1027&AppID=4&AppType=Weblog&ContentType=0" width="1" height="1">