Automatic Irrigation System 

1. Introduction

This project automatically waters plants using an Arduino UNO. A soil moisture sensor checks the moisture level in the soil. If the soil is dry, the motor turns ON. When the soil becomes wet, the motor turns OFF. This saves water and reduces manual work.

2. Components

Arduino UNO

Soil Moisture Sensor

Motor/Water Pump

Power Supply Module/Relay

Jumper Wires

Pipe/Water Source

3. Working

The moisture sensor measures the soil's water level.

Arduino reads the sensor value.

If the value is below the set limit → Motor ON.

If the value is above the limit → Motor OFF.
This makes the irrigation process fully automatic.