https://devzone.nordicsemi.com/f/nordic-q-a/4299/s130-uart-service---exampleHi, We deloped some concept(it looks not very good - sorry) for unique device which can be a slave and master. to use this demo need following Download to PCA10004 and to PCA10005 same hex file use nRF6310 board uart pinout for both boardsen-USTelligent Community 13Fri, 07 Nov 2014 10:14:02 GMThttps://devzone.nordicsemi.com/thread/15316?ContentTypeID=1Fri, 07 Nov 2014 10:14:02 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8fc814a7-6bc0-4628-96ea-023afab62c4dKonstantin<p>Unfortunately i don&#39;t have this dounge , and this issue solved. need to remove 2 lines at main.c started from 641</p> <p>err_code = dm_security_setup_req(&amp;m_dm_device_handle);<br /> APP_ERROR_CHECK(err_code);</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/15315?ContentTypeID=1Tue, 04 Nov 2014 16:25:00 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ed2988d7-24a3-4994-89ae-ef6537097d80Asbj&#248;rn<p><a href="https://www.nordicsemi.com/eng/nordic/download_resource/26386/13/97121382">May I ask you to do a sniffer trace of your application running. You can use the nRFSniffer.</a> This will enable us/or you to see the content of the disconnect packet and why the link is terminated. This will make it easier to single out the source of your issue. You can use one of the PCA10000 dongle that came with the kit you have.</p><div style="clear:both;"></div>