https://devzone.nordicsemi.com/f/nordic-q-a/2171/how-to-get-ble-sd-free-used-memoryHi, is there a function that returns free or used memory of the BLE SD? I&#39;d like to know how much memory is allocated for added service and characteristic and make a guess how many services and chars I can further add. I mean case where attribute dataen-USTelligent Community 13Thu, 10 Apr 2014 15:31:56 GMThttps://devzone.nordicsemi.com/thread/9202?ContentTypeID=1Thu, 10 Apr 2014 15:31:56 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ef4f769f-5554-4647-b4aa-65b52764ed4cMartin<p>When I tried trial-error method of adding services until error I ended on number 47. It was services without any characteristic. When I add one 20B characteristic per service it significantly dropper to only 10 services. In this case I use location in BLE SD, how can I increase it if I will use user memory for value location? I guess maybe 20-30 but it is still not much...</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/9201?ContentTypeID=1Thu, 10 Apr 2014 15:23:29 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0381cea4-49d6-41b7-9901-0a9827fc459dMartin<p>Well I found older post that explains there&#39;s 1,5kB of fixed allocated RAM in BLE SD for all GATT stuff. <a target="_blank" href="http://devzone.nordicsemi.com/index.php/sd-characteristics-per-service-limit#reply-827" rel="nofollow">http://devzone.nordicsemi.com/index.php/sd-characteristics-per-service-limit#reply-827</a> But I still have no idea what internal overhead the services and characteristic have and how can I get amount of available memory in this pool.</p><div style="clear:both;"></div>