I want to change characteristics UUIDhttps://devzone.nordicsemi.com/f/nordic-q-a/45072/i-want-to-change-characteristics-uuidHi , I have one 128 bit base UUID something like {0x07, 0x89, 0x1a, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa , 0xaa, 0xaa, 0xaa, 0xaa, 0x8a, 0xe1, 0xbc } ; And custome service UUID&#39;S are like ..... Custom service UUID.... 0x1831 Custom randomen-USTelligent Community 13Tue, 19 Mar 2019 13:24:07 GMTRE: I want to change characteristics UUIDhttps://devzone.nordicsemi.com/thread/177028?ContentTypeID=1Tue, 19 Mar 2019 13:24:07 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a7fa93f4-dbb6-4029-889c-51cf4e038dc5Simonr<p>Hi</p> <p>1. Yes, this should be possible. Take a look at my colleague&#39;s&nbsp;<a href="https://github.com/bjornspock/custom_ble_service_example">ble service tutorial</a>&nbsp;where this is done.</p> <p>2. Why would this not work with the nRF52840 as well?</p> <p>3. This is also covered in the ble service tutorial mentioned earlier.</p> <p>4. I am afraid I don&#39;t understand what you mean by this. The way you are using what in your application?</p> <p>Best regards,</p> <p>Simon</p><div style="clear:both;"></div>