RTC Crystal help

[DiogoGoncalves35]

Hi,

According to documentation the default RTC clock source is the internal, i know there is not a straight way to change it with arduino ide.

My question is, if i connect a external clock will it automatic change or is the internal still the chosen.
I am using a Xiao ESP32-C3, deep sleep for 5 minutes, everything seems ok but i don't even know if is the internal or the external that is doing the job.

Thanks.