I was out watering my yards the other day because some area didn't get enough water and the grass is yellowing. If only I can set one particular sprinkler to run five minutes longer than the rest of the other sprinklers in the zone, that would save my grass. Then I started to think, why can't we make smart sprinkler heads that give us more precise control of our irrigation, and conserve water at the same time. It's possible with today's tiny and low power chips. I did some digging into this is it's not too complex. Unfortunately I'm not an EE. But if this interest you, I'd be more than happy to go into more detail.