https://devzone.nordicsemi.com/f/nordic-q-a/91631/how-to-exit-system-off-based-on-timerI am exploring the nRF52832 using nRF52-DK for a low powered BLE device. And for that I am making the System OFF example as my basis for measuring currents of different features and software flows. The chip can be woken up from System OFF using a GPIOen-USTelligent Community 13Tue, 06 Sep 2022 11:20:49 GMThttps://devzone.nordicsemi.com/thread/384770?ContentTypeID=1Tue, 06 Sep 2022 11:20:49 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3bc0a5b4-ff0e-497b-ac7e-11ff1e601428usmanmehmood55<p>Thank you <a href="https://devzone.nordicsemi.com/members/hakon">Hakon</a>&nbsp;I realized that too, just this morning&nbsp;when I came across <a href="https://devzone.nordicsemi.com/f/nordic-q-a/90938/how-do-i-wake-up-to-nrf52840-with-timer">this thread</a>.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/384765?ContentTypeID=1Tue, 06 Sep 2022 11:06:57 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c9c905d7-c27b-4c4f-bb56-101def6b9339Hakon<p>Hello,</p> [quote user=""]After 5 seconds&nbsp;I expected it to wake up, but it never does.&nbsp;It wakes up from the GPIO just fine, but not from the timer.[/quote] <p>Waking the CPU with a timer doesn&#39;t work, because the RTC will be turned off in system off. You will need to have an external interrupt based timer to be able to wake it up like that.</p><div style="clear:both;"></div>