Smart Irrigation Scheduler with Weather Forecast and Soil Analysis

Description

Smart Irrigation Scheduler with Weather Forecast and Soil Analysis

Summary
Automated garden and farm irrigation system that uses weather forecasts and evapotranspiration calculations to determine optimal watering schedules, preventing water waste while maintaining healthy plants.

Detailed Description
A comprehensive irrigation management workflow that analyzes weather conditions, forecasts, soil types, and plant requirements to make intelligent watering decisions. The system considers multiple factors including expected rainfall, temperature, humidity, wind speed, and days since last watering to determine if irrigation is needed and how much.

Key Features
Multi-Zone Management**: Support for multiple irrigation zones with different plant and soil types
Weather-Based Decisions**: Uses OpenWeatherMap current conditions and 5-day forecast
Evapotranspiration Calculation**: Simplified Penman method for accurate water loss estimation
Rain Forecast Skip**: Automatically skips watering when significant rain is expected
Plant-Type Specific**: Different requirements for flowers, vegetables, grass, and shrubs
Soil Type Consideration**: Adjusts for clay, loam, and sandy soil characteristics
Urgency Classification**: High/medium/low priority based on moisture levels
Optimal Timing**: Adjusts watering time based on temperature and wind conditions
IoT Integration**: Sends commands to smart irrigation controllers
Historical Logging**: Tracks all decisions in Google Sheets

Use Cases
Home garden automation
Commercial greenhouse management
Agricultural operations
Landscaping company scheduling
Property management with large grounds
Water conservation projects

Required Credentials
OpenWeatherMap API key
Slack Bot Token
Google Sheets OAuth
IoT Hub API (optional)

Node Count: 24 (19 functional + 5 sticky notes)

Unique Aspects
Uses OpenWeatherMap node (rarely used in templates)
Uses Split Out node for loop-style processing of zones
Uses Filter node for conditional routing
Uses Aggregate node to collect results
Implements evapotranspiration calculation using Code node
Comprehensive multi-factor decision logic

Workflow Architecture
[Daily Morning Check] [Manual Override Trigger]
| |
+----------+-------------+
|
v
[Define Irrigation Zones]
|
v
[Split Zones] (Loop)
/ \
v v
[Get Current] [Get 5-Day Forecast]
\ /
+----+----+
|
v
[Merge Weather Data]
|
v
[Analyze Irrigation Need]
/ \
v v
[Filter Needing] [Aggregate All]
\ /
+----+----+
|
v
[Generate Irrigation Schedule]
|
v
[Has Irrigation Tasks?] (If)
/ \
Has Tasks No Tasks
/ | \ |
Sheets[Slack] [Log No Action]
\ | / |
+---+---+-----------+
|
v
[Respond to Webhook]

Configuration Guide
Irrigation Zones: Edit "Define Irrigation Zones" with your zone data (coordinates, plant/soil types)
Water Thresholds: Adjust waterThreshold per zone based on plant needs
OpenWeatherMap: Add API credentials in the weather nodes
Slack Channel: Set to your garden/irrigation channel
IoT Integration: Configure endpoint URL for your smart valve controller
Google Sheets: Connect to your logging spreadsheet

Decision Logic
The system evaluates:
Expected rainfall in next 24 hours (skip if >5mm expected)
Soil moisture estimate based on days since watering + evapotranspiration
Plant-specific minimum and ideal moisture levels
Temperature adjustments for hot days
Scheduled watering frequency by plant type
Wind speed for optimal watering time