https://devzone.nordicsemi.com/f/nordic-q-a/12185/user-description-read-onlyIs it possible to have a gatt characteristic user description being read only? I&#39;m currently using this configuration, but the &quot;nrf master control&quot; android app allows me to send a new value (showing the &quot;up&quot; arrow). ble_gatts_attr_md_t user_desc_mden-USTelligent Community 13Mon, 29 Feb 2016 11:50:05 GMThttps://devzone.nordicsemi.com/thread/46110?ContentTypeID=1Mon, 29 Feb 2016 11:50:05 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5c663d6a-7dee-46c2-8123-66f325c33c73FormerMember<p>With the permission that you have set, the descriptor should be read only. When I test it here with the parameters that you use, the &quot;arrow up&quot; is there as well. However, if you write a new value, press &quot;send&quot;, and then check the log (swipe to the right), the write operation was not successful: Error 3 (0x3): GATT WRITE NOT PERMITTED</p><div style="clear:both;"></div>