https://devzone.nordicsemi.com/f/nordic-q-a/14472/nrf52-pofwarn-issueHello, I am using nRF52832 with S132 and SDK_11.0.0. I am facing issue with using power fail warning POFWARN. below is my code snap. void POWER_CLOCK_IRQHandler(void) { if(NRF_POWER-&gt;EVENTS_POFWARN == 1) { RED_LED_ON; APP_LOG(&quot;POWER FAILen-USTelligent Community 13Tue, 14 Jun 2016 14:29:45 GMThttps://devzone.nordicsemi.com/thread/55263?ContentTypeID=1Tue, 14 Jun 2016 14:29:45 GMT137ad170-7792-4731-bb38-c0d22fbe4515:37a79c4e-a62f-48a7-bbfe-53423f2fbbbaJohn<p>The error you are getting when you use NRF_POWER_THRESHOLD_V25 is a NRF_ERROR_SOC_POWER_POF_THRESHOLD_UNKNOWN error. It is happening because 2.5V is not a valid setting for the nRF52. The POFCON settings changed on the nRF52, although I don&#39;t see the defines updated in nrf_soc.h. Check out section 18.9.6 in the nRF52832_PS_v1.0. There are now more steps.</p> <p>Your interrupt is probably not firing because NRF_POWER_THRESHOLD_V21 is a 0. I&#39;m surprised this didn&#39;t trigger an error as well.</p><div style="clear:both;"></div>