https://devzone.nordicsemi.com/f/nordic-q-a/18593/nrf24lu1-wakeup-interruptHi, Nordic I see two interrupts: #define USB_WU_ISR() void usb_wu_isr(void) interrupt INTERRUPT_USB_WU // USB wakeup interrupt (0x5b) #define WU_ISR() void wu_isr(void) interrupt INTERRUPT_WU // Internal wakeup interrupt (0x6b) maybe WU_ISRen-USTelligent Community 13Wed, 28 Dec 2016 09:18:05 GMThttps://devzone.nordicsemi.com/thread/71750?ContentTypeID=1Wed, 28 Dec 2016 09:18:05 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7da82e9e-dc1b-4c1a-8d3d-2fcbc67d598aHung Bui<p>This is the interrupts, not the wake up source it self. You enable the wakeup source by setting the WUCONF register and will receive the interrupt when the source is triggered.</p><div style="clear:both;"></div>