SAI42 - Smart Automated Irrigation System

              

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⚠️ Notice

This project is under active development. Features, architecture and hosting strategy may evolve over time.

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📑 Table of Contents

• ⚠️ Notice
• 📑 Table of Contents
• 📝 Overview
• 💡 Concept
• 🚀 Key Functions
• 🛠️ Materials Required
• 🔌 Wiring Diagram
• 🔧 Connection Details
• 📂 Upload Requirements
• 👤 Author
• 📄 License
• 🤝Contributing
• ☎️Contact

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📝 Overview

Smart Irrigation System (SAI42) is a data-driven, ESP32-powered solution for automated plant watering. It continuously monitors:

• Environmental metrics: Temperature, humidity, rainfall, ambient brightness
• Plant metrics: Soil moisture

An intelligent threshold-based controller decides when to water, while a secure web dashboard provides:

• Live sensor readings & pump status
• Historical data logs & charts
• Manual override & alert notifications

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💡 Concept

The system is organized into three layers:

1. Sensing Layer
   DHT22, LDR, rain sensor & capacitive soil probe sample data every second via ESP32 inputs.

2. Processing Layer
   On-board filtering and threshold logic determine irrigation needs based on moisture and weather.

3. Actuation & Control Layer
   A relay switches the water pump; all readings and actions are logged to LittleFS for export.

ESP32 also hosts the web UI over Wi-Fi, enabling remote monitoring and control.

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🚀 Key Functions

1. Real-Time Data Acquisition

   • Temperature & Humidity: DHT22
   • Ambient Light: LDR Module
   • Rain Detection: Rain sensor
   • Soil Moisture: Capacitive soil probe

2. Intelligent Irrigation Control

   • Threshold algorithms trigger pump when soil is dry and no rain is detected
   • Manual watering override via web UI or WebSocket command

3. Web Platform & IoT Integration

   • Home Page: Project overview & features
   
   
   • Login Page: Secure authentication & credential recovery
     
     
   • Dashboard: Live data, pump control, WebSocket updates
   
   

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🛠️ Materials Required

Component	Qty	Description
ESP32	1	Microcontroller & web server
DHT22	1	Temperature & humidity sensor
Soil Moisture Sensor	1	Capacitive moisture probe
LDR Module	1	Ambient light detection
Rain Sensor Module	1	Rain detection digital module
1-Channel Relay Module	1	Water pump switch
Water Pump	1	5 V irrigation pump
LCD I²C Module (optional)	1	On-site status display
3-Pin ON/OFF Switch	1	Main power control
LM2596 Regulator (opt.)	1	5 V→3.3 V power regulation (opt.)

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🔌 Wiring Diagram

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🔧 Connection Details

Type	Module / Component	Wiring Notes
Sensor	DHT22	Data → GPIO4 (pull-up), VCC→3.3 V, GND→GND
Sensor	Soil Moisture Sensor	Analog Out → GPIO35, VCC→3.3 V, GND→GND
Sensor	LDR Module	Voltage Divider → GPIO34, VCC→3.3 V, GND→GND
Sensor	Rain Sensor	Digital Out → GPIO15, VCC→3.3 V, GND→GND
Actuator	Relay Module	IN → GPIO5, VCC→5 V, GND→GND (common with ESP32)
Actuator	Water Pump	Powered by 5 V rail; relay NO/COM in series with pump ground
Display	LCD I²C	SDA→GPIO21, SCL→GPIO22, VCC→5 V, GND→GND
Power Rails	ESP32 VIN	5 V supply (LM2596 or USB) → VIN, GND→GND
Power Rails	3.3 V & GND	Shared by all sensors (do not exceed 3.3 V on ESP32 GPIOs)
Power Rails	5 V Rail	Relay, pump & display power; common GND with ESP32

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📂 Upload Requirements

1. Arduino IDE

   • Install latest stable version of Arduino IDE.
   • Install ESP32 USB-to-Serial Bridge Driver (either CP2102 or CH340G) if not already installed.
   • Install ESP32 board support: Getting Started with ESP32

2. Libraries
   ArduinoJson, AsyncTCP, ESPAsyncWebServer, LiquidCrystal_I2C, DHT sensor library, LittleFS, WebSockets

3. Uploading Sketch

   • Open the sketch in Arduino IDE and select the correct board and port from the Tools menu.
   • Configure your SAI42 credentials in the SAI42.ino file on the SAI42 object instance.

    /* Create the SAI object with 5 parameters:
    WiFi SSID, WiFi Password, admin username, admin password, and the device serial key. */
    SAI SAI42("SSID", "PASSWORD", "user", "admin", "E4D2U");

   • Upload the sketch to the ESP32.

4. LittleFS Plugin

• Follow tutorial: Install ESP32 LittleFS in Arduino IDE 2.0
• After uploading your sketch to the ESP32, press ctrl + shift + P to open the command palette and select Upload LittleFS to flash web UI files to the ESP32.
• Open the Serial Monitor (Ctrl + Shift + M) and set the baud rate to 115200. You should see the ESP32 connecting to Wi-Fi and starting the web server.
• Browse to the IP address shown in the Serial Monitor or in the LCD display to access the web dashboard.

👤 Author

This project is developed by Abderrahmane Abdelouafi

📄 License

This project is licensed under the ED42 Non-Commercial License v1.0. See the LICENSE file for more details.

🤝Contributing

Contributions and suggestions to enhance this project are welcome! Please feel free to submit a pull request or open an issue.

☎️Contact

For any inquiries or collaboration opportunities, please reach out to me at:

           

Thanks for stopping by and taking a peek at my work!