#include <LiquidCrystal.h>
#define sensorPin A0
#define relayPin 3



LiquidCrystal lcd(12, 11, 10, 9, 8, 7); // define LCD pins

bool pump_status;
float moistureValue;

void setup()
{
  
  lcd.begin(16, 2); // Initializes the LCD
 // Serial.begin(9600);
pinMode(relayPin, OUTPUT); // Set realy pin as OUTPUT
lcd.print("WELCOME TO SMART");
lcd.setCursor(0,1);
lcd.print("IRIGATION SYSTEM");

delay(5000);  
moistureValue = calculate_moisture(); //calculate moisture value and store to "moistureValue" variable
lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("Moisture:"+ String(moistureValue) + "%"); //print moisture value on LCD
  if (moistureValue < 30) // check intially what is moisture value
  {
   digitalWrite(relayPin, LOW); // Actuate relay (NOTE: relay is actuated when given logic low)
   pump_status = HIGH;
   lcd.setCursor(0,1); // set cursor to second row
   lcd.print("Pump Status: ON"); // print pump status on LCD 
  }
  else
  {
   digitalWrite(relayPin, HIGH);
   pump_status = LOW;
     lcd.setCursor(0,1);
   lcd.print("Pump Status:OFF");
  }
  delay (1000);
}
  // The line below can be removed after setting the date and time
  // setDateTime();


void loop()
{
  // Extracts the time from the DS1307 and shows it on the LCD
 float moistureValue = calculate_moisture();
  lcd.setCursor(0,0);
  lcd.print("Moisture:"+ String(moistureValue) + "%");
  if (moistureValue < 30 && ! pump_status)
  {
    digitalWrite(relayPin, LOW);
    pump_status = HIGH;
     lcd.setCursor(0,1);
     lcd.print("Pump Status: ON");
  }
  else if (moistureValue > 50 &&  pump_status)
  {
    digitalWrite(relayPin, HIGH);
    pump_status = LOW;
     lcd.setCursor(0,1);
     lcd.print("Pump Status:OFF");
  }
 delay(1000);
}


float calculate_moisture()
{
  int sensorValue = analogRead(sensorPin);
  //Serial.println(sensorValue);
  float Corrected_sensorValue = 1024-sensorValue; 
 float Normalised_sensorValue = (Corrected_sensorValue)/1024 ;
  float moisturePercent = Normalised_sensorValue*100 ;
  //Serial.println(Normalised_sensorValue);
  return moisturePercent;
}