I am working on a complex heating control system, and for version 2 I would like to use the alarm time function, but rather than have the schedule times hard coded I would like to pull them from an sd card, with a view to editing them from a webpage in future versions?
but after lots of googleing I cant see a way to read values from an sd card that effect the way the scheduled tasks run. This needs only be at boot up if they needed to be written to variables, but it would ideally be an unrestricted number of them (i.e. not coded to restrict to say 12 events)
Any help greatly appreciated.
I am using the Arduino Mega, and the Ethernet shield with an SD card slot.