https://devzone.nordicsemi.com/f/nordic-q-a/2032/current-comsumption-during-button-pressed-and-don-t-let-goHi all! I got a little problem with my ble device. That is: my device takes system_off mode as initial mode, when being pressed the button, it will wake up and start advertising (just the same as the ble_app_hrs example). And the problem is: Ien-USTelligent Community 13Tue, 01 Apr 2014 11:37:18 GMThttps://devzone.nordicsemi.com/thread/8721?ContentTypeID=1Tue, 01 Apr 2014 11:37:18 GMT137ad170-7792-4731-bb38-c0d22fbe4515:158049db-9eb6-4bc3-a3d2-0004595005a5Hung Bui<p>Hi kk,</p> <p>The 4mA means the CPU haven&#39;t entered sleep mode yet.</p> <p>Have you cleared the event register before you enter the loop ? Also it&#39;s not a good idea to have a loop for sleep inside the interrupt handler, you would need a higher priority to wake the chip up.</p> <p>I would suggest you to catch the pulse when you release the button instead of when you pressing it (for example instead of GPIO_PIN_CNF_SENSE_High you use GPIO_PIN_CNF_SENSE_Low ) So that the chip only wake up when you release the button.</p><div style="clear:both;"></div>