The Smart Plant Guardian is an IoT-enabled, self-sustaining plant care system that automatically monitors and maintains optimal growing conditions for your plants. It combines sensors, automation, and solar power to:
✅ Monitor soil moisture, temperature, humidity, and light levels.
✅ Automatically water plants when needed.
✅ Alert you via a mobile app if something’s wrong.
✅ Run on solar + battery power for eco-friendly operation.

Perfect for home gardeners, urban farmers, and electronics enthusiasts who want a hands-off approach to plant care!

System Overview

1. Sensors measure soil moisture, temperature, humidity, and light.

2. Crowduino (Arduino-compatible) processes data and decides when to water.

3. Water pump activates when soil is too dry.

4. WiFi (ESP8266) sends data to your phone via Blynk/MIT App Inventor.

5. Solar panel + battery keep it running without outlets.

Components Needed

Wiring Guide

Install Required Libraries

#include <DHT.h>  
#include <ESP8266WiFi.h>  
#include <Adafruit_SSD1306.h>  

2. Main Logic (Simplified)

void loop() {  
  int moisture = analogRead(A0);  
  if (moisture < 30) {  // If soil is dry  
    digitalWrite(PUMP_PIN, HIGH);  // Turn on pump  
    delay(2000);  // Water for 2 seconds  
    digitalWrite(PUMP_PIN, LOW);  
  }  
}  

Option 1: Blynk (Easiest)

1. Download Blynk App (iOS/Android).

2. Create a project with:

   • Live Soil Moisture Gauge

   • Button for Manual Watering

   • Alert Notifications

Option 2: MIT App Inventor (Customizable)

• Drag-and-drop UI with HTTP/MQTT for sensor data.

🔋 Step 4: Power & Enclosure

1. Solar Panel → TP4056 Charger → 18650 Battery

2. 3D-Printed Case (Download STL Files)

   • Waterproof electronics compartment.

   • Modular sensor mounts.

Demonstration Video

▶️ Watch How It Works! (Link to YouTube demo)

💡 Why This Project Matters

• Saves Plants from over/under-watering.

• Teaches IoT, Sensors, and Automation in a practical way.

• Open-Source & Hackable – add cameras, AI, or voice control!

⚠️ Common Pitfalls & Fixes