Ok, software done; on to the relay controller box! [danman]’s sprinkler system has four 12V AC valves that need wrangling, and no data cables, necessitating the wireless setup. Initially ...

Start by turning off the water supply to the sprinkler system. The shut-off valve should be on the home's side of the backflow preventer. It's common for the valve to be in a box just under the ...