I have not used an AB Micro810 but from experience it is easier to program any smart relay from a PC than the push button interface. Also this unit probably wont have a analoge input for your pot, which I guess is used for a timer function adjustment. You could get around this by using a binary switch, giving you 7 timers for 3 inputs or 15 for four inputs. Your above looks easy but I bet it will push this little smart relay unit to it's limits. Should not be a problem though.
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