My friend Jeff Cable was one of the early adopters of the Nest thermostat. At the time we talked a lot about the obvious next step of supporting home sprinkler/irrigation controls. Especially here in California (where we are in a pretty serious drought), having better control over irrigation (not to mention the remote access) seems like the logical next step. Rather than waiting around for Nest, I just bought and installed an OpenSprinkler. OpenSprinkler started out as a hobby kit for makers and they still sell it a variety of ways, from kits to completed units. The software is open…