https://devzone.nordicsemi.com/f/nordic-q-a/51190/add-0x2901Dear Nordic, I would like to add 0x2901 Characteristic User Description, but I use below program, it return error_code = 15, please let me know what is the correct method to add 0x2901! Thanks a lots! kwan /**@brief Function for adding the Dataen-USTelligent Community 13Wed, 21 Aug 2019 10:51:31 GMThttps://devzone.nordicsemi.com/thread/205269?ContentTypeID=1Wed, 21 Aug 2019 10:51:31 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8cf8c8cb-f5b8-4b0f-ae53-1176730b964aDmitry<p>Please look at&nbsp;<a href="https://devzone.nordicsemi.com/f/nordic-q-a/5318/how-to-add-user-description-to-characteristic">this</a> topic</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/205151?ContentTypeID=1Wed, 21 Aug 2019 00:47:38 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5fb5a8fc-4182-4b21-be84-65c62dfdcb5cHKFU<p>Hi ,</p> <p>I have not set them manually! Any example to show me how to add 0x2901?</p> <p>Thanks!</p> <p>kwan</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/205061?ContentTypeID=1Tue, 20 Aug 2019 13:26:52 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c6e5dba8-350e-4c2a-98dc-31eacbd53e13Dmitry<p>Hi,</p> <p>User description and presentation format can be<span>&nbsp;</span>defined<span>&nbsp;</span>in&nbsp;ble_gatts_char_md_t structure, they are managed by stack, that&#39;s why you get&nbsp;NRF_ERROR_FORBIDDEN if you&#39;re trying to set them manually.</p><div style="clear:both;"></div>