#include  
#include 
#include  

const int ledPin = 8;
const int ldrPin = A0;

LiquidCrystal_I2C lcd(0x27,16,4); 
dht DHT; 

#define soilWet 750   
#define soilDry 500   
#define sensorPower 7
#define sensorPin A1
#define relay 6
#define DHT22_PIN 2  
 
float hum;  
float temp; 


void setup() {
  lcd.init();
  lcd.clear();         
  lcd.backlight();  
  pinMode(sensorPower, OUTPUT);
  pinMode(relay, OUTPUT);
  digitalWrite(relay, LOW);
  digitalWrite(sensorPower, LOW);
  pinMode(ledPin, OUTPUT);
  pinMode(ldrPin, INPUT);
  Serial.begin(9600);
}


void loop() {
int moisture = readSensor();
  lcd.setCursor(2,0);  
  Serial.print("Analog Output: ");

 if (moisture > soilWet) {
    lcd.print("Soil Dry"); 
     lcd.setCursor(2,1);  
  lcd.print("Time to Water");
    digitalWrite(relay, LOW);
  } else if (moisture <= soilWet && moisture >= soilDry) {
    lcd.print("Soil Perfect");
  } else {
   lcd.print ("Soil Wet");
        lcd.setCursor(2,1);   
  lcd.print("Stop Watering");
    digitalWrite(relay, HIGH);
  }
    delay(7000);  

    int chk = DHT.read22(DHT22_PIN);
    hum = DHT.humidity;
    temp= DHT.temperature;
    lcd.setCursor(0,0);
    lcd.print("Humidity: ");
    lcd.print(hum);
    lcd.print("%");
    lcd.setCursor(0,1);
    lcd.print("Temp: "); 
    lcd.print(temp);
    lcd.println("    C");
    delay(7000); 

   int ldrStatus = analogRead(ldrPin);
   lcd.clear();
   lcd.setCursor(0,0);
   lcd.print("  LDR  ");
   lcd.setCursor(6,1);
   lcd.print(ldrStatus);  
   delay(0);
   if (ldrStatus < 750) {
   digitalWrite(ledPin, LOW);
   }
   else {
   digitalWrite(ledPin, HIGH);
   }
   delay(7000);
   
 }

  int readSensor() {
  digitalWrite(sensorPower, HIGH); 
  delay(10);              
  int val = analogRead(sensorPin);  
  digitalWrite(sensorPower, LOW);   
  return val;             
}