🌧️ Rainmaker 9000

Rainmaker 9000 is a gravity-fed, automatic plant watering system powered by an ESP32 microcontroller with a touchscreen interface. It lets you configure and automate watering schedules for 2 independently controlled solenoid valves—no plumbing skills required.

This project is ideal for makers, tinkerers, and home gardeners who want to combine DIY electronics with smart automation.

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🛠️ Features

• 💧 Gravity-fed system for silent, energy-efficient watering
• ⏱️ Per-valve scheduling: set volume in mL per day or week
• 🔌 Touchscreen interface with intuitive controls (built using LVGL)
• 🧰 Fully open source: firmware, 3D models, and schematic included

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📁 Repository Structure

rainmaker9000/
├── rainmaker9000.ino        # Arduino firmware for the ESP32
├── models/                  # 3D-printable STL files for the housing & modules
├── schematic.png            # Wiring diagram for electronics
├── image1.png               # Photo of the completed project
└── README.md                # This file

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📸 Images

🔌 System Schematic

🌿 Completed Build

Check out the youtube video!

Youtube Link

You can also find the project on Printables

Printables Link

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🧠 How It Works

1. A top-mounted water reservoir feeds a water rail via gravity.
2. The ESP32 controls 12V relays which then control solenoid valves.
3. The touchscreen interface allows users to configure:
   • Milliliters per watering cycle
   • Frequency: daily or weekly
4. The system saves user settings and tracks the last watering time.

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🧪 Getting Started

📦 What You Need

• 1x ESP32 CYD Dev Board with touchscreen - Amazon Link
• 12V DC power supply - Amazon Link
• 2x 12V Solenoid valves - Amazon Link
• 2x 12V Relay modules - Amazon Link
• 1/4 OD Tubing & fittings - Amazon Link
• 5V Waterproof Buck Converter - Amazon Link
• Random screws from your garage
• 3D-printed housing (in models/)

🚀 Upload Firmware

1. Open rainmaker9000.ino in Arduino IDE.
2. Install dependencies (LVGL v9+, TFT_eSPI, XPT2046_Touchscreen, etc.) - You will need to configure TFT_eSPI for this project.
3. Set your board and port.
4. Upload the firmware to your ESP32.

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🖨️ 3D Printing

All STL files for the Rainmaker 9000 modular enclosure and parts are in the /models folder. Files are optimized for FDM printing.

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🧩 Roadmap / Coming Soon

• Modular design with expanable numbers of valves
• Moisture sensor integration
• Wi-Fi + mobile dashboard (optional module)
• Kit version for public release

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📜 License

This project is licensed under the MIT License. Feel free to use, modify, and distribute it.

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🤝 Contributing

Pull requests, bug reports, and suggestions are welcome! Feel free to fork this repo or open an issue if you have ideas or need help.