Is it possible to have a very long interrupt timer such as many minutes or even hours?
Any examples I see using the 16 bit timer1 are on the order of seconds or fractions, and with a prescale of 1024 it looks like 8.3 seconds is the max. I hope I am missing something.
I'm trying to make a very low power moteino project with hardware interrupts. The moteino will sleep most of the time and get interrupted occasionally, but I also want to wake it up every hour or two to check the battery life and send an "I'm still alive" signal to a base station.