RTC & GPIO wake-up for nRF52832

[LeonWu]

Hi team,

Customer is asking if they can wake-up nRF52832 using RTC and GPIO at same time? RTC as regular wake-up method and GPIO as cased wake-up, any suggestion for this case? Do we have any example?

Thanks!

Leon

[jacky4566]

Yes its possible. Check out the powerdown example here:

https://github.com/NordicPlayground/nrf51-powerdown-examples

And the RTC example in the SDK.

Caveats:

• None of the timers run in System Off sleep so you can ONLY wake on GPIO with OFF
• Dont confuse Real Time Counters with Real Time Clocks. The RTC on Nordic chips is a 24 bit counter meant to run at faster speeds than 1HZ. Typically you set a compare match after X cycles and keep track of UTC/UNIX in software.