Automatic Plant Watering System Using Arduino

Introduction

 

In this article I'll show you how to create an automatic plant watering system using Arduino Mega interfacing to Android mobile. This project is fully based upon soil moisture irrigation.

 

Requirements

• Arduino Mega
• Soil Moisture Sensor
• Motor
• HC-05 Bluetooth Module
• Bread Board
• GSM900 Module
• Led
• Some Wires 

Connections

 

GSM

• RX to RX1
• TX to TX 1
• Gnd to Gnd  

Bluetooth

• RX to TX
• TX to RX
• Vcc to Arduino 5v
• Gnd to Gnd  

Led

• Anode to the digital pin 5
• Cathode pin to the Gnd  

Soil Moisture 

•  Vcc pin to the 5v
• Gnd to Gnd
• Data pin to the Analog A0  

Programming

#include<SoftwareSerial.h>
SoftwareSerial firstSerial(15,16);
int led = 5;
int pin=A0;
int moisture=0;
String readString;
void setup()
{
    Serial.begin(9600);
    firstSerial.begin(9600);
    Serial.begin(9600);
    pinMode(led, OUTPUT);
      delay(100); // Baud Rate
}

void loop()
{
    while (Serial.available()) //Send data only when you receive data
    {
        delay(4); //delay time
        char c = Serial.read();
        readString += c;
    }
    if (readString.length() > 0)
    {
        Serial.println(readString);
        if (readString == "ON")
        {
            digitalWrite(led, HIGH); // LED ON
        }
        if (readString == "OFF")
        {
            digitalWrite(led, LOW); //LED OFF
        }
        readString = "";
    }
    int soilmoisture=analogRead(pin);
    if(soilmoisture>=100){
  digitalWrite(led,HIGH);
  firstSerial.println("AT+CMGF=1");
  delay(1000);
  firstSerial.println("AT+CMGS=\"+xxxxxxxxxx\"\r");  //Enter Your Mobile Number instead XXXX while Testing
  delay(1000);
  firstSerial.println("Hai there I need some water");
  delay(100);
  firstSerial.println((char)23);
  delay(1000);
}
else{
  digitalWrite(led,LOW);
}
  Serial.println(soilmoisture);
  Serial.print("%");
  delay(20);
}

Android App

• The Android App is developed using MIT App inventor.
  
  
• The Android coding is attached in the zip you can download and install it to your mobile and you can modify it with your own method. 

Explanation

 

The Automatic plant watering system is based upon soil irrigation. In the program first we want to set the header file to the GSM Module and set the RX and TX Pin to the GSM Module. In the setup function we want to set the baud rate for GSM and the Arduino Board as  9600 and here we are using the HC-05 Bluetooth device for pairing between Android mobile and the Arduino when it is paired,  which means completely controlled through the Android device. Here's the procedure:

 

Working Procedure

 

Step 1: Connect the device using BT Communication method and pair it to Android Mobile.

Step 2: It shows the status every 60 seconds.

Step 3: When the temperature is greater than 100 the water will pump through the plant. This is based on soil irrigation.

  

Output 

 

 

 

  

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