Flux Irrigation Controller
ESP32-S3 smart irrigation controller supporting 8-32 zones. Weather-based scheduling, rain sensor support, and expansion boards. Built on ESPHome for seamless Home Assistant integration with full local control.
Buy Now — $250.00How It All Connects
Every Flux device communicates over WiFi. Choose the architecture that fits your needs.
Home Assistant Version
All devices connect via WiFi to your Home Assistant server. The Flux Irrigation Add-on brokers all devices seamlessly, providing total local control with no cloud dependency. Optionally share a connection key with your management company for remote monitoring.
Specifications
| Zones | 8 built-in, expandable up to 32 |
| Processor | 240 MHz dual-core, WiFi built-in |
| Scheduling | 4 start times per day, auto-advance, repeat cycles |
| Rain Sensor | Supported, with configurable 1-72 hour rain delay |
| Master Valve / Pump | Dedicated output for master valve or pump start relay |
| Valve Transition | 3-second seamless overlap between zones |
| Connectivity | WiFi 802.11 b/g/n |
| Setup | Bluetooth, captive portal, or serial |
| Updates | Over-the-air (OTA) firmware updates |
| Firmware | ESPHome, v1.2.7 |
Features
Everything you need for intelligent, reliable irrigation management.
Weather-Based Irrigation
9 configurable weather rules via the Home Assistant Add-on. Automatically adjust watering schedules based on forecasts, temperature, and rainfall data.
Rain Sensor Support
Normally Open or Normally Closed sensor types with configurable rain delay from 1 to 72 hours. Automatic irrigation shutoff on rain detection.
Expansion Boards
Scale up to 32 zones with MCP23017 I2C expansion boards. Auto-detection of connected boards at addresses 0x20 through 0x22.
Smart Scheduling
4 programmable start times with 7-day scheduling. Auto-advance cycles through enabled zones automatically with repeat cycle support.
Pump / Master Valve
Zone 8 is configurable as a pump start relay with automatic 2-second startup delay. Stays on throughout the entire irrigation cycle.
OTA Firmware Updates
Update wirelessly from the ESPHome dashboard or Home Assistant. Firmware releases hosted on GitHub with automatic update notifications.
Home Assistant Add-on
Unlock advanced irrigation management with the Flux Irrigation Add-on for Home Assistant.
The Flux Irrigation Home Assistant Add-on (v1.2.2) extends your controller with a full management dashboard and intelligent automation features. Install directly from the Home Assistant Add-on Store or from GitHub.
- Homeowner dashboard with zone status and scheduling overview
- Weather-based irrigation with 9 configurable rules
- Gophr soil moisture probe integration for data-driven watering
- Rain sensor management and delay configuration
- PDF system reports for irrigation history and diagnostics
- Connection keys for lawn care and management companies
The Add-on runs locally on your Home Assistant server. All data stays on your network. No cloud account required for the Home Assistant version.
Management companies can connect remotely using connection keys generated from the homeowner dashboard, enabling professional monitoring without requiring direct access to your Home Assistant instance.
Companion Products
Expand your irrigation system with these compatible accessories.
Resources
Documentation, source code, and community support.