https://devzone.nordicsemi.com/f/nordic-q-a/60685/usbd-data-transmission-stops-while-soft-device-is-turned-onHi, I have created a configuration based on usbd_app_uart example where both usbd and softdevice are enabled on my device as soon as the device is turned on. When I transmit a test string (Hello World) continuously with app_usbd_cdc_acm_write() functionen-USTelligent Community 13Mon, 27 Apr 2020 16:09:42 GMThttps://devzone.nordicsemi.com/thread/246921?ContentTypeID=1Mon, 27 Apr 2020 16:09:42 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b31ed19d-147c-49ab-b9e9-75e4acc91bf4masterLee<p>Hi,</p> <p>yes it was exactly that, Thank you!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/246808?ContentTypeID=1Mon, 27 Apr 2020 12:08:57 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e532fe8b-a659-41ce-9ae7-f90b96a6f01eKenneth<p>I suspect the advertisement is timing out, and you have the following code in on_adv_evt():</p> <p><pre class="ui-code" data-mode="c_cpp"> case BLE_ADV_EVT_IDLE: sleep_mode_enter(); break;</pre></p><div style="clear:both;"></div>