https://devzone.nordicsemi.com/f/nordic-q-a/52950/how-to-start-working-device-information-workHi. My target device is nRF51822 and SDK version is 12.3.0. I try to add Device Information Service to example &quot;ble_app_uart_pca10028_s130&quot; ---------- main.c (added code below) #include &quot;ble_dis.h&quot; static ble_uuid_t m_adv_uuids[] = { {BLE_UUID_NUS_SERVICEen-USTelligent Community 13Fri, 11 Oct 2019 10:46:47 GMThttps://devzone.nordicsemi.com/thread/214558?ContentTypeID=1Fri, 11 Oct 2019 10:46:47 GMT137ad170-7792-4731-bb38-c0d22fbe4515:511952c0-2a0c-469d-9b52-5ea4b3618834Susheel Nuguru<p>The DIS service is showing up quite ok on the DK using phone or nrfConnect desktop.&nbsp;</p> [quote user=""]After build and load, BLE advetiseing data shows Device Information Service exsting, but&nbsp;it does not works.[/quote] <p>This means the problem is your custom device specific, can you please run your application in debug mode and tell us more about what &quot;does not works&quot; means? does it get stuck in a loop or app_error handler?&nbsp;</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/214245?ContentTypeID=1Thu, 10 Oct 2019 02:07:53 GMT137ad170-7792-4731-bb38-c0d22fbe4515:88d1e2aa-d80c-4714-9506-980c188394d2JacOG<p><a href="https://devzone.nordicsemi.com/cfs-file/__key/communityserver-discussions-components-files/4/5857.ble_5F00_app_5F00_uart.zip">devzone.nordicsemi.com/.../5857.ble_5F00_app_5F00_uart.zip</a><br />I attached Zip file of&nbsp;modifyed ble_app_uart project files.<br />&nbsp;</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/214043?ContentTypeID=1Wed, 09 Oct 2019 07:07:49 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2b6ef177-a9e5-4b32-b761-c70ad9f34120Susheel Nuguru<p>The code snipped looks quite OK. Could you attach a minimalistic project for me to test it out so that i can attempt to debug it. If ble_dis_init is executed without any error, then I would assume that this should work.</p><div style="clear:both;"></div>