https://devzone.nordicsemi.com/f/nordic-q-a/34375/service-not-foundDear all, I am using the nRF51822 custom developed board. Earlier it was working fine, but now when I try to connect the BLE with nRF ToolBox APP UART service, the APP is automatically getting disconnect with the BLE by showing &quot;the device does noten-USTelligent Community 13Wed, 16 May 2018 11:43:17 GMThttps://devzone.nordicsemi.com/thread/132253?ContentTypeID=1Wed, 16 May 2018 11:43:17 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0f3482ce-2de3-46e0-8e4a-f183e3324b99Turbo J<p>Try deleting the bonding. Discovery data can be cached if the Service changed notification is not present, so you might be looking at stale cached UUID here.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/132249?ContentTypeID=1Wed, 16 May 2018 11:36:23 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c387fa25-d86a-4c84-bc6d-9e462469c2f1Rawootray<p>Hello Bjorn Kvaale, I made the changes in the&nbsp;BLE_UUID_NUS_SERVICE, earlier it was 0x0001 (working)&nbsp; then I changed it to 0x1234 (not working). When I again changed to earlier value i.e 0x0001 then also it is not working. I am using the SDK 12.0 in this I am using ble_app_uart example.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/132202?ContentTypeID=1Wed, 16 May 2018 08:51:49 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d3bf2454-4be2-4b94-94ce-4d326e746660Bj&#248;rn Kvaale<p>What changes did you make between the time when everything was working &amp; now that it is not working? Which example from the&nbsp;SDK are you currently using? Which version of the SDK are you using?</p><div style="clear:both;"></div>