I am new at arduino and i am trying to learn how can I have a delay for long period of time. I also have a PICF8523 RTC module from adafruit.
What I want to know how can I have a simple function, either using mills() or the RTC, to have a delay of 30 minute or 15 minute which I can call in between functions to create this delay.
something like this :
Thanks for you help in advance.