https://devzone.nordicsemi.com/f/nordic-q-a/22150/can-t-change-nrf51822-characteristic-uuidmodify ble_app_uart example。 I change the #define to another value： But whether lightblue or nRF connect，It only change the advertisement&#39;s UUID.The Characteristic is not change. In function ble_nus_init() in ble_nus.c，I find it already callen-USTelligent Community 13Thu, 18 May 2017 03:01:53 GMThttps://devzone.nordicsemi.com/thread/87057?ContentTypeID=1Thu, 18 May 2017 03:01:53 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9cfeeed2-c446-4916-af0e-392060c10c80zero<p>thank you very much！</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/87056?ContentTypeID=1Thu, 18 May 2017 02:53:50 GMT137ad170-7792-4731-bb38-c0d22fbe4515:03871327-0689-4180-b50d-a3974ef9b866RK<p><a href="https://devzone.nordicsemi.com/question/133713/cant-seem-to-modify-the-lbs-uuids/">devzone.nordicsemi.com/.../</a> ?</p><div style="clear:both;"></div>