ESP-SMTe Controller
21
Advanced ET Programming
In the Advanced ET programming mode, the ESP-SMTe is a
fully “weather-based” irrigation system.
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NOTE: A complete guide to programming in Advanced
ET mode is available at www.rainbird.com/esp-smte.
Weather Based Irrigation Overview
Watering is based on actual landscape needs instead of
the predetermined schedule used by “time-based” pro-
gramming.
Current weather data from the SMTe Weather Sensor and
specific site conditions are used to automatically update
irrigation schedules so that plants only get water when it
is needed.
The ESP-SMTe in Advanced ET mode will use 30% to 50%
less water than a traditional time-based watering schedule.
Factors That Affect Irrigation
Weather
Local weather conditions will affect the amount of water
that plants need. Current weather data as well as historical
data such as wind speed and humidity are used for sched-
uling.
Soil Type
Different soil types vary greatly in the ability to hold water
and the rate that water filters down through the soil. The
Soil Type in each zone helps determine when plants need
water.
Clay
Sand
Loam
The ESP-SMTe Smart Modular Control System
continuously monitors weather conditions on-
site to determine when irrigation is required.
1. Controller determines when irrigation is required.
2. Controller schedules irrigation.
3. Irrigation occurs.
4. Controller monitors weather conditions.
Irrigation Scheduling