Feather nRF52840 RTC (Real Time Counter)

Question

Hi,

For the Adafruit Feather nRF52840 board I cannot find any information about the RTC. On the Feather board the 32kHz crystal is connected to the RTC clock input (P0.00 and P0.01). My question is how to control the RTC? I want to put the SoC to sleep and after some time wake-up by the RTC. I have found examples for the SLEEP OFF mode (wake-up by pin change) but not for the SLEEP ON mode (wake-up by RTC).

Thanks,

Tjerk

Leytronix · Answer

Hello, 
 I now have found a solution by using the watchdog timer to wake-up from sleep instead of the RTC. 
 Cheers! 
 Tjerk