switching on at intervals

[marcoc]

Hi,
I would like to activate the magnetic kalkwasser mixer at given intervals, say 20 sec every 3 hours.
How can I do it? Many thanks.

Marco

[lnevo]

ReefAngel.Relay.Set(Port8,now()%10800<20);

Change port 8 to your port.

[RonaldCony]

Thanks for all the help i will check all that out.