//Library for using LCD display with I2C
#include <LiquidCrystal_I2C.h>

//Setting up LCD 
LiquidCrystal_I2C lcd(0x27, 16, 2); 

int blueLED= 12; // blue diode pin D12
int redLED= 11; // red diode pin D11
int sInput= 0; // Sensor input pin A0
int value= 0;

//method made for printing on lcd display
  void printSensor(){
   lcd.clear();
   lcd.setCursor(0,0);
   lcd.print("Soil Moisture:");
   lcd.setCursor(0,1);
  }

//this method prints value of sensor 
  void printValue(int value){
   lcd.clear();
   lcd.setCursor(0,0);
   lcd.print("Sensor value:");
   lcd.print(value);
   lcd.setCursor(0,1);
   //this part tells user if he needs to water plant or not
   if(value < 50)
   {
    lcd.print("Water your plant");
   }
   else
   {
    lcd.print("Plant is good");
   }
  }

//this method changes lights on diodes, if everything is ok the blue diode will work, and if plant needs water the red diode will be on
  void diodeLights(int value){
    if(value < 50){
      digitalWrite(redLED,HIGH);
      digitalWrite(blueLED, LOW);
      lcd.print("NOT ENOUGH");
    }
    else
    {
      digitalWrite(blueLED,HIGH);
      digitalWrite(redLED,LOW);
      lcd.print("ENOUGH");
    }
  }

  
void setup() {
   lcd.clear();
   lcd.backlight();
   lcd.init();
   lcd.begin(16,2);
   Serial.begin(9600);
   pinMode(redLED,OUTPUT);
   pinMode(blueLED,OUTPUT);
}

void loop() {
   lcd.clear();

   printSensor();
   
   value= analogRead(sInput);
   value = constrain(value, 485, 1024);
   value = map(value, 485, 1024, 100, 0); 

   //You can add this part if you want to check values on serial monitor 
   //Serial.println("Sensor value");
   //Serial.println(value);

   diodeLights(value);
   delay(2000);
   
   printValue(value); 
   delay(3000);
   
}