We have two sprinkler controllers in our house, one for frontyard and another one for the backyard. Both these sprinkler controllers are located in the garage near each other. Each of these sprinkler systems have three zones. We want to buy Rachio 3 and combine the frontyard and backyard sprinkler zones in one Rachio 3 controller.
Is it possible? If yes, what is the wiring recommendation for Rachio 3?