I’ve been using my Rachio 3 for about a month now and the lawn is turning brown. I have 6 zones (front shrubs, rear shrubs, front lawn, right lawn, back lawn, and left lawn).
At first I was all excited to see the rachio skipping watering using the Flex schedule. I just received and installed my flow meter. Because the lawn is turning brown and with the help of the flow rates and a spreadsheet, calculated the nozzle inches per hour to be 0.25 instead of 1.00. After changing the nozzle IPH in advanced settings, the scheduler said I needed to be watering 16 hours per day - 4 hours x 4 lawn zones instead of four hours @ 1 hour per lawn zone (not going to happen-i bought the thing to save money on watering). I manually forced the schedule from 4 hours per zone to 1 hour.
I manually emptied all the zones to force the rachio to water overnight. After the sprinklers ran this morning, I looked at the moisture level and it said 70%, with is the same level as when the nozzle inches per hour was set to 1.00. I would think if the controller knew that it needed 4 hours to fill a zone but only ran for 1 hour that the moisture level would be 17.5%