https://devzone.nordicsemi.com/f/nordic-q-a/4830/nrf51-dongle-s310-system-off-and-wakeup-problemHello , I&#39;m working since few days on nRF51 dongle with SofDevice S310 and most things seem to be ok. But when I follow the System OFF and wake-up sample supplyed on GitHub nothing works. I tryed with P0.18 exposed on nRF51 dongle : nrf_gpio_cfg_sense_inputen-USTelligent Community 13Fri, 19 Dec 2014 15:46:02 GMThttps://devzone.nordicsemi.com/thread/17072?ContentTypeID=1Fri, 19 Dec 2014 15:46:02 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f624e4c5-7562-4d5a-829f-5fe20843ff7dAsbj&#248;rn<p>Could it be that since you are configuring NOPULL on the sense pin that it&#39;s floating and maybe it&#39;s at low when you enter power down? If you use an oscilloscope, do you see changing state on the pin? How are you toggling the pin when you try to wake it up? Have you soldered connectors to the edge of the dongle?</p><div style="clear:both;"></div>