https://devzone.nordicsemi.com/f/nordic-q-a/122351/why-does-my-device-have-2-nus-servicesThere are two NUS services here, but only the second one can send data through the RX characteristic. I&#39;ve checked the source code and nothing has changed. How do I delete one?en-USTelligent Community 13Thu, 19 Jun 2025 08:42:42 GMThttps://devzone.nordicsemi.com/thread/539835?ContentTypeID=1Thu, 19 Jun 2025 08:42:42 GMT137ad170-7792-4731-bb38-c0d22fbe4515:57052a22-f12f-477c-b2ab-fd6913f6cca6Leo Mo<div> <div> <div> <div><span>CONFIG_BT_NUS</span><span>=y</span></div> <div><span>CONFIG_BT_NUS_CLIENT</span><span>=y</span></div> </div> </div> <div><span>CONFIG_BT_ZEPHYR_NUS</span><span>=y</span></div> <div><span>CONFIG_BT_ZEPHYR_NUS_DEFAULT_INSTANCE</span><span>=n</span></div> <div><span></span></div> <div></div> <div><span>Set CONFIG_BT_ZEPHYR_NUS_DEFAULT_INSTANCE to n can solve this issue.</span></div> </div><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/539727?ContentTypeID=1Wed, 18 Jun 2025 13:41:11 GMT137ad170-7792-4731-bb38-c0d22fbe4515:77bbc0cf-1023-45b8-b158-bc0394921ce1Edvin<p>Hello,</p> <p>I suspect that this is a phone caching issue. If you connect using a phone that has not been connected to this device before, do you still see two instances? Or try to connect to it using <a href="https://www.nordicsemi.com/Products/Development-tools/nRF-Connect-for-Desktop">nRF Connect for Desktop</a> -&gt; Bluetooth Low Energy (requires an extra DK), do you still see two instances of that service?</p> <p></p> <p>If you do, can you please try to capture a sniffer trace of the devices connecting, so that I can have a look at the service discovery?</p> <p>If you don&#39;t have access to another phone or another DK, can you please upload the application that you are using here in this ticket, then I can see if I see the same if I flash it to an nRF52840 DK?</p> <p></p> <p>Best regards,</p> <p>Edvin</p><div style="clear:both;"></div>