Smart Irrigation Controller Internal Structure

This internal block diagram shows how a smart irrigation system brings together environmental sensing and water delivery. The controller receives weather, rain, soil-moisture and flow data, as well as commands from a mobile app. It operates the pump and the zone valve manifold, which supplies the garden zones. Soil and flow measurements return from the zones, making the feedback loop explicit. The drawing works well for an early system design meeting: it identifies the parts that need interfaces without choosing a particular sensor protocol or controller board. Add a leak alarm, a second manifold, rain delay logic or a weather-service connection as the design becomes more specific.