RTC Wake up

[bhakti]

I am interfacing external RTC PCF8563 to nrf52840. Also I will be using low power sleep mode. Will it be possible to wake up nrf using 1hr alarm interrupt of rtc?

[Jørgen Holmefjord]

Hi,

It is possible to wake the nRF52840 from both System ON and System OFF idle modes using GPIO input.

For System ON, see the Pin Change Interrupt Example, for System OFF, you can reference the code in this example on GitHub.

Best regards,
Jørgen