Garduino

// Garduino with LCD, Soil Sensor and LDR for sunlight detection
// LDR connects to AO
// Soil Sensor on Digital 8
// Pump connects via mosfet/relay to pin 13
// Backlight Anode to pin 6 to enable backlight control
// LCD rs = 12, en = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2

#include <LiquidCrystal.h>
const int lightsensor = A0;   // the number of the sun sensor pin
const int soilsensor = 8;  // the number of the soil sensor pin
const int pumpPin = 13;      // the number of the water pump pin
const int BLPin = 6;
const int rs = 12, en = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);

// variables will change:
int soilstate = 0;         // variable for reading the sensor status
int lightstate = 0;        // variable for sun light
void setup() {
  pinMode(BLPin, OUTPUT); // initialize lcd backlight pin
  pinMode(pumpPin, OUTPUT);   // initialize the pump pin as an output:
  pinMode(soilsensor, INPUT);   // initialize the soil sensor pin as an input:
  lcd.begin(16, 2);   // set up the LCD's number of columns and rows:
  Serial.begin(9600); //configure serial to talk to computer
   }

void loop() {
  soilstate = digitalRead(soilsensor);   // read the state of the soil sensor value:
  lightstate = analogRead(lightsensor);   // read the state of the light sensor value:
  Serial.println(lightstate);
  Serial.println(soilstate);
    if (soilstate == HIGH && lightstate < 450 ) {// turn pump on
        digitalWrite(pumpPin, HIGH);
        digitalWrite(BLPin, HIGH);
        lcd.display();
        lcd.print("Soil Dry");
        lcd.clear();
  } else if (soilstate == LOW && lightstate < 450) {// turn pump off
        digitalWrite(pumpPin, LOW);
        digitalWrite(BLPin, HIGH);
        lcd.display();
        lcd.print("Soil Wet");
        lcd.clear();
  } else if (soilstate == HIGH && lightstate > 450) {// turn pump and lcd off
        digitalWrite(pumpPin, LOW);
        digitalWrite(BLPin, LOW);
        lcd.noDisplay();
        lcd.clear();
  } else if (soilstate == LOW && lightstate > 450) {//turn pump and lcd off
        digitalWrite(pumpPin, LOW);
        digitalWrite(BLPin, LOW);
        lcd.noDisplay();
        lcd.clear();
        }
}