Automatic Plant Watering and Irrigation System

#include <dht.h>
#define dht_dpin A0
dht DHT;
//———————–
#include <LiquidCrystal.h>
LiquidCrystal lcd (8, 9, 10, 11, 12, 13);
//———————————-
int plantPotMoisture[3] = {A1, A2, A3};
//———————
#include <GSM.h>
#define PINNUMBER “”
GSM gsmAccess; // include a ‘true’ parameter for debug enabled
GSM_SMS sms;
char remoteNumber[] = “0899506304”;
String moistureMessage = “Moisture is Low on sensor: “;
String SMS_Alert = “Sending SMS!”;
String humidityMsg = “Humidity is High. Open All Solenoids”;
String tempMsg = “Temperature is too HIGH!..Open ALl Solenoids “;
String messageBuffer = “”;
char senderNumber[20];
String stringOne = “Opens1”;
String stringTwo = “Opens2”;
String stringThree = “Opens3”;
String stringFour = “OpenAll”;
//—————
#define solenoidData 5
#define solenoidClockster 4
#define solenoidLatch 6
//—————
const int master = 0;
const int slave1 = 1;
const int slave2 = 2;
const int slave3 = 3;
boolean takeReadings = true;
int serialSolenoidOutput = 0;
void setup()
{
pinMode(solenoidData, OUTPUT);
pinMode(solenoidClockster, OUTPUT);
pinMode(solenoidLatch, OUTPUT);
digitalWrite(solenoidLatch, HIGH);
digitalWrite(solenoidLatch, LOW);
shiftOut(solenoidData, solenoidClockster, MSBFIRST, 0);
digitalWrite(solenoidLatch, HIGH);
//————————-
Serial.begin(9600);
lcd.begin (16, 2);
lcd.clear();
lcd.setCursor(0, 0);
lcd.print(“Wait Until”);
lcd.setCursor(0, 1);
lcd.print(“GSM Initialized!”);
boolean notConnected = true;
while (notConnected)
{
if (gsmAccess.begin(PINNUMBER) == GSM_READY)
notConnected = false;
else
{
Serial.println(“Not connected”);
delay(1000);
}
}
}
void loop()
{
if (takeReadings)
{
moistureSensor();
TempAndHumidity ();
if (DHT.humidity > 50 || DHT.temperature > 25 && takeReadings )
{
takeReadings = false;
if (DHT.humidity > 50)
{
sendSMS(humidityMsg);
}
else if (DHT.temperature > 25)
{
sendSMS(tempMsg);
}
while (!takeReadings)
recieveSMS();
}
if (plantPotMoisture[0] > 30 || plantPotMoisture[1] > 30 || plantPotMoisture[2] > 30 && takeReadings)
{
takeReadings = false;
if (plantPotMoisture[0] > 30)
{
sendSMS(moistureMessage + “1”);
}
else if (plantPotMoisture[1] > 30)
{
sendSMS(moistureMessage + “2”);
}
else
{
sendSMS(moistureMessage + “3”);
}
while (!takeReadings)
recieveSMS();
}
}
}
void moistureSensor()
{
for (int i = 0 ; i < 3; i++)
{
lcd.clear();
plantPotMoisture[i] = analogRead(i);
plantPotMoisture[i] = map(plantPotMoisture[i], 550, 0, 0, 100);
Serial.print(“Mositure” + i );
lcd.print(“Mositure” + i);
Serial.print(plantPotMoisture[i]);
lcd.print(plantPotMoisture[i]);
Serial.println(“%”);
lcd.print(“%”);
delay(1000);
}
}
void TempAndHumidity ()
{
DHT.read11(dht_dpin);
lcd.setCursor(0, 0);
lcd.print(“Humidity=”);
Serial.print(“Current humidity = “);
Serial.print(DHT.humidity);
lcd.print(DHT.humidity);
lcd.print(“%”);
Serial.print(“%”);
Serial.print(“temperature = “);
Serial.print(DHT.temperature);
Serial.println(“C”);
lcd.setCursor(0, 1);
lcd.print(“temp=”);
lcd.print(DHT.temperature);
lcd.print(“C “);
delay(1000);
lcd.clear();
}
void sendSMS(String messageToSend)
{
Serial.print(“Sending a message to mobile number: “);
Serial.println(remoteNumber);
Serial.println(“SENDING”);
lcd.print(SMS_Alert);
Serial.println();
Serial.println(“Message:”);
Serial.println(messageToSend);
sms.beginSMS(remoteNumber);
sms.print(messageToSend);
sms.endSMS();
Serial.println(“\nCOMPLETE!\n”);
lcd.clear();
lcd.print(“Completed!!!”);
}
void recieveSMS()
{
char c;
if (sms.available())
{
lcd.clear();
lcd.print(“Message received from:”);
delay(800);
lcd.clear();
sms.remoteNumber(senderNumber, 20);
lcd.print(senderNumber);
while (c = sms.read())
{
Serial.println(c);
messageBuffer += c;
}
Serial.println(messageBuffer);
if (messageBuffer == stringOne)
{
toggleSolenoid1();
takeReadings = true;
}
else if (messageBuffer == stringTwo)
{
toggleSolenoid2();
takeReadings = true;
}
else if (messageBuffer == stringThree)
{
toggleSolenoid3();
takeReadings = true;
}
else if (messageBuffer == stringFour)
{
toggleAll();
takeReadings = true;
}
else
{
takeReadings = true;
}
messageBuffer = “”;
Serial.println(“\nEND OF MESSAGE”);
// Delete message from modem memory
sms.flush();
Serial.println(“MESSAGE DELETED”);
}
delay(1000);
}
void toggleSolenoid1()
{
solenoidWrite(master, HIGH);
delay(1000);
solenoidWrite(slave1, HIGH);
delay(1000);
solenoidWrite(slave1, LOW);
delay(1000);
solenoidWrite(master, LOW);
delay(1000);
}
void toggleSolenoid2()
{
solenoidWrite(master, HIGH);
delay(1000);
solenoidWrite(slave2, HIGH);
delay(1000);
solenoidWrite(slave2, LOW);
delay(1000);
solenoidWrite(master, LOW);
delay(1000);
}
void toggleSolenoid3()
{
solenoidWrite(master, HIGH);
delay(1000);
solenoidWrite(slave3, HIGH);
delay(1000);
solenoidWrite(slave3, LOW);
delay(1000);
solenoidWrite(master, LOW);
delay(1000);
}
void toggleAll()
{
solenoidWrite(master, HIGH);
delay(1000);
solenoidWrite(slave1, HIGH);
delay(1000);
solenoidWrite(slave2, HIGH);
delay(1000);
solenoidWrite(slave3, HIGH);
delay(1000);
solenoidWrite(slave1, LOW);
delay(1000);
solenoidWrite(slave2, LOW);
delay(1000);
solenoidWrite(slave3, LOW);
delay(1000);
solenoidWrite(master, LOW);
delay(1000);
}
void solenoidWrite(int pin, bool state)
{
if ( pin >= 0 && pin < 8)
{
if (state)
serialSolenoidOutput |= (1 << pin);
else
serialSolenoidOutput &= ~(1 << pin);
}
digitalWrite(solenoidLatch, LOW);
shiftOut(solenoidData, solenoidClockster, MSBFIRST, serialSolenoidOutput);
digitalWrite(solenoidLatch, HIGH);
}