how do I use the Power supply supervisor to determine if the battery is below the POF thershold?https://devzone.nordicsemi.com/f/nordic-q-a/7138/how-do-i-use-the-power-supply-supervisor-to-determine-if-the-battery-is-below-the-pof-thersholdI have set the POFCON to enable the power failure comparator and set the voltage level to2.5 volts. How do I know when the battery voltage is below the 2.5 volt level? How do I register for the POFWARN event?en-USTelligent Community 13Wed, 20 May 2015 09:04:02 GMTRE: how do I use the Power supply supervisor to determine if the battery is below the POF thershold?https://devzone.nordicsemi.com/thread/25224?ContentTypeID=1Wed, 20 May 2015 09:04:02 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6aaecc06-e2a1-4032-9499-5fc981f173a3Stefan Birnir Sverrisson<p>Hi</p> <p>There is a POF example on <a href="https://devzone.nordicsemi.com/question/6914/pofwarn-example/">this thread</a>. Also, there is a discussion on how to use it properly on <a href="https://devzone.nordicsemi.com/question/16015/power-fail-comparator/">this thread</a>.</p><div style="clear:both;"></div>RE: how do I use the Power supply supervisor to determine if the battery is below the POF thershold?https://devzone.nordicsemi.com/thread/25223?ContentTypeID=1Tue, 19 May 2015 18:28:38 GMT137ad170-7792-4731-bb38-c0d22fbe4515:30aabf34-6549-41b3-8e03-93496b75e504John<p>No, it is part of the NVMC which you can access and deal with directly if you are not using the soft device. You will get the POFWARN event directly from the NVMC rather than the stack handling it and sending your a NRF_EVT_POWER_FAILURE_WARNING stack event.</p><div style="clear:both;"></div>RE: how do I use the Power supply supervisor to determine if the battery is below the POF thershold?https://devzone.nordicsemi.com/thread/25222?ContentTypeID=1Tue, 19 May 2015 17:22:27 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2a1c7fc1-49bf-449d-beeb-0535a6fb4d3eGlenn<p>Do I need to use the soft device stack to get this event?</p><div style="clear:both;"></div>RE: how do I use the Power supply supervisor to determine if the battery is below the POF thershold?https://devzone.nordicsemi.com/thread/25221?ContentTypeID=1Tue, 19 May 2015 17:08:19 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4f27400c-17a7-44a3-84d3-5ef4aa70dbd3John<p>I believe you are supposed to get a POF warning event allowing you to prepare for power failure. If you are using the soft device stack I believe the stack will send you a NRF_EVT_POWER_FAILURE_WARNING if you enable the POF using sd_power_pof_enable.</p><div style="clear:both;"></div>