Smart Greenhouse Backend

This repository contains the backend for a Smart Greenhouse System designed for remote monitoring and control of environmental conditions.
The backend is built on an IoT architecture using the MQTT protocol for hardware communication and a REST API with WebSockets for client-side interaction.

Key Features

• Real-time Data Monitoring
  Receive live sensor data (temperature, humidity, soil moisture, etc.) via MQTT and stream it to the dashboard using Socket.io.

• Remote Control
  Control actuators (fans, lamps, irrigation systems) securely via the API.

• Advanced Authentication
  Secure registration and login with JWT (Access & Refresh Tokens) stored in httpOnly cookies.

• Sensor-Specific Data Collections
  Each sensor type has its own MongoDB collection, optimized for time-series queries and varying data rates.

• Reporting System
  Generate statistical reports (average, minimum, maximum) for custom date ranges.

• Modular & Scalable Architecture
  Organized controllers, models, and routes for easy development and maintenance.

Technology Stack

• Platform: Node.js
• Framework: Express.js
• Database: MongoDB (Mongoose ODM)
• IoT Protocol: MQTT
• Real-time Communication: Socket.io
• Authentication: JWT (Access & Refresh Tokens)
• Password Security: bcrypt

Project Architecture

Hardware (ESP32/Arduino) → MQTT Broker → Backend (this project) → MongoDB
                                              ↓
                                        Web Client (Frontend)

• Hardware (ESP32/Arduino): Collects sensor data and publishes it to MQTT topics.
• Backend: Subscribes to MQTT topics, processes data, and stores it in MongoDB.
• Frontend: Communicates via REST API & WebSockets to show live data and send commands.
• Command Dispatch: Backend publishes control commands → hardware executes them.

Getting Started

Prerequisites

• Node.js (v16 or higher)
• MongoDB
• MQTT Broker (e.g., Mosquitto)

Installation

Clone the repository and install dependencies:

npm install

Create a .env file (based on .env.example):

# MongoDB Connection URI
MONGODB_URI=mongodb://localhost:27017/smart_greenhouse

# JWT Secrets
ACCESS_TOKEN_SECRET=your_strong_access_token_secret
REFRESH_TOKEN_SECRET=your_strong_refresh_token_secret

# MQTT Broker
MQTT_BROKER_URL=mqtt://localhost:1883

# Server Port
PORT=2000

Run the server:

npm start

The server will be available at:
http://localhost:2000

API Endpoints

Authentication (/auth)

• POST /auth/register – Register a new user
• POST /auth/login – Login & receive tokens (cookies)
• POST /auth/refresh – Refresh access token
• POST /auth/logout – Logout user

Sensor Data

• GET /sensor-summary – Latest sensor readings summary
• GET /sensor-last10 – Last 10 records for each sensor type

Control

• GET /get-control – Get current actuator status (fan, lamp, etc.)
• POST /set-control – Update actuator status

Reporting

• GET /reports – Generate statistical report
  • Query Params: startDate=YYYY-MM-DD&endDate=YYYY-MM-DD

MQTT Topics

Subscribed Topics (Incoming Sensor Data)

• greenhouse/temperature
• greenhouse/humidity
• greenhouse/soil

Published Topics (Outgoing Commands)

• greenhouse/control/command

Programmer

Shady Nikooei