The Smart Irrigation Assistant (SIA) adaptor works in conjunction with an existing standard sprinkler timer to automatically modify the amount of water that is delivered to each zone based on the relative humidity. Provisions are also made for having the water delivered in intervals within the maximum time set on the standard sprinkler timer. This allows time for the water to soak into the ground before the remainder of the water allocated for that zone is applied. The SIA is powered from the existing standard sprinkler timer. It is connected to each of the wires that control the irrigating valves and it is connected in series with the common (ground) wire that goes to all valves. The SIA breaks the connection on the common circuit to the valves in order to stop the flow of water to the active zone.
