Does the Arduino clock run while it's in sleep mode? hour() minute() second()

Projects Programming
1

Hi,

I have an Arduino Pro Micro 3.3 V that I want to put in sleep mode (SLEEP_MODE_PWR_DOWN), waken up by an external interrupt. In that program I also gather the time from an external RTC in the setup() {} function, which I use later with the hour(), minute() and second() functions. I was wondering if the Arduino kepts its internal timer functional while in sleep mode, or if I have to gather it from the RTC after every wake up.

Thanks in advance,
Glenn

2

you have to gather it after every wakeup, that is definitely most robust.