https://devzone.nordicsemi.com/f/nordic-q-a/28601/send-and-receive-data-over-blehello sir, i am using ble mpu example and it working fine now i want do send some commands from mobile to nrf52832 chip via these commands my application should work. like if i send command &quot;ON&quot; through mobile then application should work, if i senden-USTelligent Community 13Mon, 18 Dec 2017 13:40:10 GMThttps://devzone.nordicsemi.com/thread/113353?ContentTypeID=1Mon, 18 Dec 2017 13:40:10 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0d9266c0-18a2-4a98-bf67-40ef9bb90fbeRahul<p>thank you sir for your reply. i am checking this and give you the correct info. what actually happening</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/113352?ContentTypeID=1Mon, 18 Dec 2017 11:25:02 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2ccdd2dc-d5ac-4f4b-b319-4f865312df76MartinBL<p>Hi,</p> <p>It sounds like NUS is the way to go. I&#39;m not sure if I understand your problem, but if your device doesn&#39;t advertise it is pretty likely that your code has asserted and ended up in an endless while loop or is continuously resetting itself. When you merged NUS into your application, did you remember to check all return codes of your function calls with for example APP_ERROR_CHECK()? Have you <a href="https://devzone.nordicsemi.com/question/60125/my-device-is-freezing-and-restarting/">debugged like this</a>?</p><div style="clear:both;"></div>