Basics

An Open Source Software and Hardware Project making a Irrigation Controller
Largely aimed at Irrigation Sprinkler Systems in Lawns , although could be used for Drip Irrigation lines etc
Allows for IOT use, although can be used as a "dumb" controller as well
It can be build fully DIY with a Raspberry Pi and some other OTS Electronic Components, or a Premade module can be purchased
The Pipes/Valves/Pumps and all that + Wires to them are still needed if using this in new construction

Internal Links

GardenBot and FarmBot for more Garden Oriented Designs
- AquaShield and HydroBot for more Soil-Free Agriculture (ie Hydroponics , Aquaponics etc) Oriented Designs
SMS controlled Wireless Irrigation System (A Similar Concept using a "Candy Bar" Cell Phone and an Arduino as well as some other components)