https://devzone.nordicsemi.com/f/nordic-q-a/61592/conflict-issues-between-gpio-and-ble-advertisingHi. I am using nRF52840 Dongle. A problem occurred while merging the PIN_CHANGE_INT examples based on the BLE_APP_BEACON example. I connected the external button to the breadboard. pins (0,24) and buttons, buttons and GND. The device is restarted whenen-USTelligent Community 13Wed, 20 May 2020 14:51:14 GMThttps://devzone.nordicsemi.com/thread/251046?ContentTypeID=1Wed, 20 May 2020 14:51:14 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9786f50f-5292-46af-ae5c-26b60450b5fdJared<p>Hi,</p> <p></p> <p>[quote user=""][/quote]</p> <p><span>How can I solve this problem?</span></p> <p></p> <div style="overflow:auto;"> <div><a href="#"></a></div> </div> <p></p> <p>&nbsp;</p> <p>Try to use the debugger and see where the program actually turns the LEDs ON. A quick look at your code shows that LEDs are toggled in the start_advertising() and in the in_pin event handler. I suggest setting a breakpoint there and observe when the event handler is called.&nbsp;</p> <p>regards</p> <p>Jared</p><div style="clear:both;"></div>