https://devzone.nordicsemi.com/f/nordic-q-a/24209/nrf51-pstorage-during-ble_radio_active_evtI&#39;ve been banging my head against this for a couple days now, and need some help. First the layout. In our setup we have an accelerometer with a movement interrupt pin (high when movement detected) tied to a sense high input, and a stationary interrupten-USTelligent Community 13Thu, 10 Aug 2017 14:52:17 GMThttps://devzone.nordicsemi.com/thread/95335?ContentTypeID=1Thu, 10 Aug 2017 14:52:17 GMT137ad170-7792-4731-bb38-c0d22fbe4515:82e401b4-dea9-400b-ab1a-a6a74640d24eJeremy<p>Thanks! Knowing what was going on it was a lot easier to solve. Moved the sd_power_system_off() call to the pstorage callback to fire when an PSTORAGE_UPDATE_OP_CODE was detected, and just returned from the radio notification interrupt after starting the update, and everything seems to be working great.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/95334?ContentTypeID=1Thu, 10 Aug 2017 11:25:35 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6cbed974-a628-484d-be43-92c83c80148cHung Bui<p>Hi Jeremy,</p> <p>Stay in a radio notification call back to wait for the pstorage call back may be not a very a good idea. Radio notification and flash notification share the same interrupt.So flash notification won&#39;t be able to trigger when you are still in the radio notification call back. Same applied for any same priority level interrupts.</p> <p>What you should do is to set a flag and then wait for the operation to complete in a sleep in the main loop, or use app scheduler.</p><div style="clear:both;"></div>