A professional, cloud-connected ecosystem for precision greenhouse management.

Greenhouse Tender is a robust IoT solution designed to monitor and control your greenhouse environment in real-time. By bridging low-level hardware sensors with a high-performance Flutter mobile application via Firebase, it provides a seamless, "mission-control" experience for the modern gardener.

• Dark Mode UI: A sleek, battery-friendly interface designed for high contrast and readability.
• Real-Time Data: Instant updates for Temperature, Humidity, Soil Moisture, and pH levels using Firestore real-time listeners.
• Visual Health Indicators: Cards change color (Green/Red) dynamically based on user-defined safety thresholds.

• Bi-Directional Control: Toggle Fans, Vents, and Heaters directly from the app.
• State Feedback: Buttons glow green only when the device confirms it is active, ensuring true state synchronization.
• Live Video Feed: Integrated low-latency video streaming from an ESP32-CAM to keep an eye on your plants from anywhere.

• Data Aggregation: Cloud Functions merge incoming MQTT sensor streams into a single "latest status" document to prevent UI flickering.
• Smart Alerts: Automated Firebase Cloud Messaging (FCM) push notifications when environmental conditions drift out of safe ranges.
• History Logging: Separate scalable storage for historical sensor data to support future analytics.

The system follows a reactive, event-driven architecture:

graph LR
    subgraph Greenhouse
        ESP32[ESP32 Controller] -- MQTT --> Broker[HiveMQ Broker]
        Cam[ESP32-CAM] -- HTTP Stream --> App
    end

    subgraph Cloud
        Broker -- Webhook --> Func[Cloud Functions]
        Func -- Write --> Firestore[(Firestore DB)]
        Firestore -- Listen --> App[Flutter App]
        App -- Write Command --> Firestore
        Firestore -- Trigger --> Func
        Func -- Publish Command --> Broker
        Broker -- Subscribe --> ESP32
    end

• Microcontroller: ESP32 DevKit V1
• Video: ESP32-CAM (AI-Thinker)
• Sensors: DHT22 (Temp/Hum), Capacitive Soil Moisture, Analog pH Sensor (SEN0161), DS18B20 (Probe)
• Actuators: 4-Channel 5V Relay Module

• Language: C++
• Framework: Arduino / PlatformIO
• Libraries: PubSubClient (MQTT), Adafruit_SSD1306 (OLED), DHT

• Runtime: Node.js (Firebase Cloud Functions)
• Database: Google Cloud Firestore (NoSQL)
• Messaging: HiveMQ (MQTT Broker) + Firebase Cloud Messaging (FCM)

• Framework: Flutter (Dart)
• Dependencies: cloud_firestore, flutter_vlc_player, fl_chart, google_fonts, font_awesome_flutter

greenhouse-monitoring/
├── esp32-firmware/         # C++ firmware for sensor reading & relay control
├── esp32-cam-firmware/     # C++ firmware for video streaming server
├── cloud-functions/        # Node.js backend logic (triggers, aggregation)
├── flutter-app/            # Production-ready mobile application
│   ├── lib/
│   │   ├── widgets/        # Reusable UI components (SensorCard, ControlRow)
│   │   └── main.dart       # Main entry point & dashboard logic
├── docs/                   # Wiring diagrams and datasheets
└── README.md               # Project documentation

1. Open esp32-firmware in VS Code with the PlatformIO extension.
2. Rename include/config.h.template to include/config.h and add your WiFi/MQTT credentials.
   • Note: The firmware is configured for Secure MQTT (SSL/TLS) on port 8883. Ensure your broker supports this (e.g., HiveMQ Cloud).
3. Build and Upload to your ESP32.
4. Repeat for esp32-cam-firmware.

1. Navigate to cloud-functions:

   cd cloud-functions
   npm install

2. Deploy to Firebase:

   firebase deploy --only functions

1. Navigate to flutter-app:

   cd flutter-app
   flutter pub get

2. Update the camera IP in lib/main.dart (line 60).
3. Run the app:

   flutter run

Contributions are what make the open-source community such an amazing place to learn, inspire, and create. Any contributions you make are greatly appreciated.

1. Fork the Project
2. Create your Feature Branch (git checkout -b feature/AmazingFeature)
3. Commit your Changes (git commit -m 'Add some AmazingFeature')
4. Push to the Branch (git push origin feature/AmazingFeature)
5. Open a Pull Request

Distributed under the MIT License. See LICENSE for more information.

Pat Ryan - GitHub Profile

Project Link: https://github.com/secretengineer/Greenhouse-Tender-2