https://devzone.nordicsemi.com/f/nordic-q-a/120128/connecting-and-disconnecting-ble-with-nrf52832When disconnecting and connecting BLE, if the J-Link debugger is connected, BLE_EVT_DISCONNECTED in ble_evt_handler is executed, but if the debugger is not connected and the device is running, BLE_GAP_EVT_DISCONNECTED is not executed. I&#39;m checking byen-USTelligent Community 13Fri, 04 Apr 2025 10:09:52 GMThttps://devzone.nordicsemi.com/thread/530590?ContentTypeID=1Fri, 04 Apr 2025 10:09:52 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7715d84f-d435-42ac-b750-82eb39e420fahelsing<p>Hi Junichi, </p> <p>Is this a custom board? Have you verified that any other samples&nbsp;(Blinky, for example) are running properly without J-Link connected? Here is a <a href="https://devzone.nordicsemi.com/f/nordic-q-a/111537/nrf52832-custom-board-only-runs-application-in-debug-mode">chain of tickets</a> referring to similar problems.</p> <p>Debug mode forces the LDO to be on. If Blinky is not running properly, check if DC/DC is enabled in the code and try disabling it: <code>CONFIG_BOARD_ENABLE_DCDC=n</code>.&nbsp; </p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/529309?ContentTypeID=1Thu, 27 Mar 2025 13:40:19 GMT137ad170-7792-4731-bb38-c0d22fbe4515:00ebd420-98f1-4f7b-9008-7e575bea6732helsing<p>Hi Junichi, </p> <p>Is the application configured to use an external crystal? Is it configured to use LDO or DC/DC?</p> <p>Which SDK are you using?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/528772?ContentTypeID=1Tue, 25 Mar 2025 09:02:09 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ae6b91b1-ad17-4aaf-ad7d-9a3ebc6f0eb1Turbo J<p>If physically disconnecting the debug cable changes behaviour beyond the sleeping stuff, check GND connection(s).</p> <p>The debug cable contains another GND wire...</p><div style="clear:both;"></div>