https://devzone.nordicsemi.com/f/nordic-q-a/89571/deep-sleep-mode-with-rtc-and-gpio-interrupt-wakeupHello, Our application requires the device to go into deep sleep and wake up every 24Hr or on the Accelerometer interrupt. We were able to obtain the sleep mode and wake up with the GPIO interrupt but could not find a way to wake up by RTC/Time baseden-USTelligent Community 13Mon, 04 Jul 2022 12:57:42 GMThttps://devzone.nordicsemi.com/thread/375328?ContentTypeID=1Mon, 04 Jul 2022 12:57:42 GMT137ad170-7792-4731-bb38-c0d22fbe4515:fb795605-49a6-40ea-9894-123e847b0b91Vidar Berg<p>Hello,</p> <p><span>Unfortunately, with <a title="System OFF mode" href="https://infocenter.nordicsemi.com/topic/ps_nrf9160/chapters/pmu/doc/operationmodes/system_off_mode.html?cp=2_0_0_4_0_1">System OFF mode</a>, you are forced to use an external wake up source. To be able to use the internal RTC, you have to let the app core stay in system ON mode. </span></p> <p><span>The various sleep currents can be found in the table here: <a title="Sleep" href="https://infocenter.nordicsemi.com/topic/ps_nrf9160/_tmp/alta.nRF9160/autodita/CURRENT/parameters.id_current_sleep.html?cp=2_0_0_4_5_0_1">Sleep</a> </span></p> <p><span>Best regards,</span></p> <p><span>Vidar</span></p><div style="clear:both;"></div>