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Rain Bird ESP4SMTEi 4 Zone Indoor Modular Smart Controller with weather sensor

Rain Bird ESP4SMTEi 4 Zone Indoor Modular Smart Controller with weather sensor
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Rain Bird ESP4SMTEi 4 Zone Indoor Modular Smart Controller with weather sensor


Smart Irrigation Control System

Other Smart Sprinkler Timers claim simplicity and precision; the Rain Bird® ESP-SMTe Smart Control System delivers. Combining the proven simplicity of the Extra Simple Programming (ESP) controller family with the accuracy of weather-based control, this innovative system can now expand up to 22 zones.

The ease and speed with which you can program this controller is remarkable. Simply input a few key specifics, such as your zip code, allowed watering days and the plant/soil type for each zone; the ESP-SMTe does the rest. Your irrigation system waters only when the landscape requires it. And you save 30-70% in water.


With mounting regulations and severe drought in many regions of the country, the days when water inefficiency was overlooked are gone. The future promises even more restrictions for the irrigation industry. But along with these challenges come opportunities. Pioneering smart irrigation technology, Rain Bird was the first full-line irrigation manufacturer with a controller to earn the EPA’s WaterSense label, ensuring it is at least 20 percent more efficient than non-labeled products.

All models of the Rain Bird ESP-SMTe controller are EPA WaterSense approved.

What is the WaterSense Label

The U.S. Environmental Protection Agency developed a WaterSense program to make it easier for consumers to:

  • Recognize water saving products by labeling products that meet water conservation requirements. 
  • Gain access to new water saving innovations.
  • Understand the value of water efficiency.
  • Reduce strain on water resources.

How does the ESP-SMTe Save Water

The ESP-SMTe integrates technology used by top golf courses for decades and puts it into a user friendly controller.

  • On-site rainfall data - The ESP-SMTe collects site rainfall amounts and uses this information to re-calculate run times for each zone.
  • Historical weather data – The internal memory of the ESP-SMTe contains over 8 years of historical weather data.  This data, along with the onsite rainfall and temperature information is used to adjust the watering schedule on a daily basis. 
  • Reduced water run-off –The ESP-SMTe Cycle and Soak™ feature allows the controller to adjust zone run times based on soil conditions and slope to reduce/eliminate water run-off.  

Rain Bird is a proud EPA WaterSense Partner.




Instant rainfall shut-off and useable measurement

A smart controller should be smart enough to account for rainfall, right? Not always. In fact, most smart controllers simply suspend irrigation when it rains, without accurately measuring rainfall. By comparison, the ESP-SMTe not only suspends irrigation, it measures instantaneous rainfall amounts, determines the effective rainfall and calculates exactly how much to adjust your watering schedule to prevent over-watering and under-watering.

The proven accuracy of weather-based scheduling

In designing the ESP-SMTe, we’ve simply reduced the cost and complexity of the weather-based control systems we began pioneering for golf courses over 25 years ago. Drawing on the industry-leading precision of these larger, more sophisticated units, the ESP-SMTe makes Rain Bird weather-based control affordable for homeowners—once and for all.

Expandable modular design

The Rain Bird ESP-SMTe can grow with your landscape, easily expanding from 4 stations up to 22 stations with the addition of optional hot-swappable expansion modules.

Zone-specific water calculations

Different plants have different watering requirements. That’s why the ESP-SMTe customizes each zone’s irrigation schedule. It factors in location, soil type, landscape slope, plant type/density, sun exposure, sprinkler type and root-depth requirements. Based on this zone-specific data, the ESP-SMTe controller optimizes the irrigation schedule to promote lush, healthy plant material in each part of your yard, while substantially reducing water waste and runoff.

Three-year trade warranty.


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4 Zone Indoor Modular Smart Controller with weather sensor

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4 Zone Outdoor Modular Smart Controller with weather sensor 

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Upgrade kit to convert existing
ESP Modular into ESP-SMTe

Applies to ESP-Modular controllers manufactured after April 2005.


Expandable up to 22 zones using ESPSM6 
Six Zone Expansion Modules or ESPSM3 Three Zone Expansion Modules.

All ESP-SMTe models come with a heavy-duty adjustable bracket and 25 feet of 18-2 UV-rated non-burial wire for connection between the controller panel and the weather sensor pod. Up to 200 feet of appropriate wire may be spliced to extend range.




    • Width: 10.7”
    • Height: 7.7”
    • Depth: 4.4”

Sensor (Largest Area Across)

    • Width: 6.0”
    • Length: 8.8”
    • Height: 5.9” (includes Solar Shield)

Mounting Bracket (Mounted on Vertical Surface)

    • Maximum reach: 7.0”

Electrical Specifications

    • Input Required: 120VAC +/- 10%
    • Output: 25.5VAC 1A
    • Surge Protection: Primary input side has (2) built-in MOV’s (metal oxide varistor) to protect circuitry. Output side has(2) built-in MOV’s for each valve station.
    • Power back-up: Lithium coin-cell battery maintains time and date while non-volatile memory maintains the schedule.
    • Multi-valve station capacity: Up to two 24VAC, 7VA solenoid valves per station plus a master valve.


Rain Bird ESP-SMTe Manuals


ESP-SMTe Brochure
ESP-SMTe Sell Sheet 
ESP-SMTe Tech Spec

Customizable Homeowner Marketing Kit

ESP-SMTe Flyer
ESP-SMTe Postcard 
ESP-SMTe Bill Stuffer


ESP-SMTe Contractor's Manual, English
ESP-SMTe Homeowner's Guide, English
ESP-SMTe Homeowner's Guide, Spanish 
ESP-SMTe Homeowner's Guide, French 
ESP-SMTe Quick Start Guide, English 
ESP-SMTe Quick Start Guide, Spanish 
ESP-SMTe Quick Start Guide, French 
ESP-SMTe Site Profile Programming Chart - English
ESP-SMTe Site Profile Programming Chart - Spanish
ESP-SMTe Site Profile Programming Chart - French


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