Published March 8, 2026 © MIT

ESP32 Smart Plant Watering System (Automatic Irrigation)

An ESP32-based smart irrigation system that automatically waters plants when the soil becomes dry. 🌱💧

BeginnerFull instructions provided8 hours1,246

ESP32 Smart Plant Watering System (Automatic Irrigation)

Things used in this project

Software apps and online services

Arduino IDE

Story

🌍 1️⃣ Introduction

Plants ko healthy rakhne ke liye regular watering bahut important hoti hai. Lekin aksar problems hoti hain:

❌ Log paani dena bhool jate hain❌ Travel ke time plants dry ho jate hain❌ Overwatering se plants damage ho jate hain

Is problem ko solve karne ke liye maine design kiya:

🌱 Smart Plant Watering System

🌱 Smart Plant Watering System

Ye system soil moisture detect karta hai aur automatically plant ko paani deta hai.

💡 2️⃣ System Overview

Smart Plant Watering System:

✔ Soil moisture monitoring✔ Automatic irrigation✔ Water pump control✔ Real-time monitoring✔ Smart gardening solution

🧰 3️⃣ Required Hardware

3.1️⃣ ESP32 (Main Controller)

Use:ESP32 system ko control karta hai aur WiFi communication handle karta hai.

3.2️⃣ Soil Moisture Sensor

Use:Soil ki moisture level detect karta hai.

3.3️⃣ Relay Module

Use:Water pump ko ON/OFF control karta hai.

3.4️⃣ Mini Water Pump

Use:Plants ko paani supply karta hai.

3.5️⃣ 5V Power Supply

Use:System ko stable power supply deta hai.

🔌 4️⃣ Circuit Diagram

🔗 5️⃣ Wiring Table

Soil Moisture Sensor → ESP32

VCC → 3.3VGND → GNDAO → GPIO 34

Relay Module → ESP32

IN → GPIO 26VCC → 5VGND → GND

Water Pump → Relay Output

💻 6️⃣ Software Used

1️⃣ Arduino IDE2️⃣ ESP32 Board Package3️⃣ WiFi Library4️⃣ MQTT / HTTP API5️⃣ Mobile App / Web Dashboard

⚙️ 7️⃣ Working Logic

1️⃣ Soil moisture sensor soil ki condition measure karta hai2️⃣ Agar soil dry hai → pump ON3️⃣ Pump plant ko paani deta hai4️⃣ Soil moisture sufficient hone par pump OFF5️⃣ System continuous monitoring karta hai

🚀 8️⃣ Key Features

✔ Automatic plant watering✔ Soil moisture detection✔ Smart irrigation✔ Water saving✔ Smart gardening solution

🏡 9️⃣ Applications

✔ Home gardening✔ Greenhouses✔ Smart farming✔ Indoor plants✔ Agricultural IoT projects

📈🔎 SEO Keywords

Smart plant watering systemIoT plant irrigation systemESP32 smart irrigation projectautomatic plant watering systemsoil moisture irrigation systemsmart gardening IoT

📞 🔧 Project Support

Complete project, customization, PCB design & deployment available.

📲 WhatsApp: +91 9336183481

🏁 Conclusion

Smart Plant Watering System helps:

✔ Keep plants healthy✔ Save water✔ Reduce manual work✔ Enable smart gardening

🌱 Automate your plant care with IoT technology.

🌱 ESP32 Smart Plant Watering System Complete ESP32 Code

// -------------------------------
// Smart Plant Watering System
// Using ESP32 + Soil Moisture Sensor
// -------------------------------

// Pin Configuration
#define MOISTURE_SENSOR 34
#define RELAY_PIN 26

// Moisture Threshold
int drySoil = 2500;   // Adjust according to sensor

int moistureValue;

// -------------------------------
void setup()
{
  Serial.begin(115200);

  pinMode(RELAY_PIN, OUTPUT);

  // Pump OFF initially
  digitalWrite(RELAY_PIN, HIGH);

  Serial.println("Smart Plant Watering System Started");
}

// -------------------------------
void loop()
{

  // Read soil moisture
  moistureValue = analogRead(MOISTURE_SENSOR);

  Serial.print("Soil Moisture Value: ");
  Serial.println(moistureValue);

  // Check soil condition
  if(moistureValue > drySoil)
  {
    // Soil is dry → Pump ON
    Serial.println("Soil Dry - Pump ON");

    digitalWrite(RELAY_PIN, LOW);
  }
  else
  {
    // Soil is wet → Pump OFF
    Serial.println("Soil Wet - Pump OFF");

    digitalWrite(RELAY_PIN, HIGH);
  }

  delay(3000);
}