EcoSprinkle

Water Smarter, Grow Better

Overview

Full-stack IoT smart irrigation platform. ESP32 reads soil moisture and DHT22 data, publishes via MQTT to a Node.js backend (with its own Aedes broker), stores readings in MongoDB, and serves a Flutter mobile app over REST + WebSocket. Includes a promotional landing page built with React/Vite/Tailwind.

Problem

▸30–50% water waste from over-watering
▸Manual watering is time-consuming and inconsistent
▸High water bills and maintenance costs

Solution

▸Real-time soil moisture monitoring with automated pump control
▸Configurable watering schedules + auto mode
▸24/7 remote monitoring via mobile app

System Architecture

┌─────────────┐   MQTT    ┌──────────────────┐   REST/WS   ┌──────────────────────┐
│  ESP32       │◄─────────►│  Node.js Backend  │◄───────────►│  Flutter Mobile App  │
│  (Sensors)   │  Telemetry│  (Aedes Broker)   │   HTTPS     │  (Cross-Platform)    │
└─────────────┘            └───────┬──────────┘             └──────────────────────┘
                                   │
                         ┌─────────▼─────────┐
                         │  MongoDB (Mongoose)│
                         └───────────────────┘

Key Features

▸Smart Irrigation — automated watering based on soil moisture thresholds
▸Scheduling & Automation — multiple schedules, auto mode
▸Mobile Control — real-time monitoring, push notifications
▸IoT Hardware — ESP32, DHT22, soil moisture sensor, relay module
▸Data Visualization — interactive charts for activity logs & water usage
▸WiFi Provisioning — QR code pairing, automatic reconnection
▸Smart Alerts — real-time plant health notifications

Technology Stack

Mobile

FlutterDartmqtt_clientsocket_io_clientfl_chartmobile_scanner

Backend

Node.jsExpressMongoDBMongooseAedes (MQTT)Socket.IOJWT

Hardware

ESP32Soil Moisture SensorDHT22Relay ModulePump

Website

React 18ViteTailwind CSSFramer Motion

Notable Design Decisions

▸Embedded MQTT broker (Aedes) inside the Node.js backend — no separate broker service
▸Dual communication: MQTT for device telemetry, REST + WebSocket for mobile app
▸QR code WiFi provisioning for zero-config device setup
▸JWT authentication with device-specific security keys
▸Flutter cross-platform from a single codebase (Android APK currently, iOS planned)