#include <LiquidCrystal_I2C.h>
#include <Wire.h>
LiquidCrystal_I2C lcd(0x27, 16, 2);
#define SensorPin A0            
#define Offset 0.00            
unsigned long int avgValue;  
#define TdsSensorPin A1
#define VREF 5.0 
#define SCOUNT 30 
int analogBuffer[SCOUNT]; 
int analogBufferTemp[SCOUNT];
int analogBufferIndex = 0, copyIndex = 0;
float averageVoltage = 0, tdsValue = 0, temperature = 25;

int led1 = 2;
int led2 = 3;
void setup()
{
  pinMode(13,OUTPUT);
    pinMode(led1,OUTPUT);
    pinMode(led2,OUTPUT);
  pinMode(TdsSensorPin, INPUT); 
  Serial.begin(115200); 
led();
}



void loop()
{   
pHsensor();
ECsensor();

}





void led()
{  lcd.init();
  lcd.clear();
  lcd.backlight();
    lcd.setCursor(3, 0);
  lcd.print("WELCOME TO");
  delay(2000);
  lcd.clear();

 lcd.setCursor(3, 0);
  lcd.print("Smart farm");
  delay(2000);
lcd.clear();


  lcd.setCursor(2, 0);
  lcd.print("Staring Work.");
  delay(1000);
lcd.clear();

  lcd.setCursor(2, 0);
  lcd.print("Staring Work.");
  delay(100);
 
  lcd.setCursor(0, 1);lcd.print("*");delay(100);
    lcd.setCursor(1, 1);lcd.print("*");delay(100);
      lcd.setCursor(2,1 );lcd.print("*");delay(100);
        lcd.setCursor(3, 1);lcd.print("*");delay(100);
         lcd.setCursor(4, 1);lcd.print("*");delay(100);
         lcd.setCursor(5, 1);lcd.print("*");delay(100);
         lcd.setCursor(6, 1);lcd.print("*");delay(100);
         lcd.setCursor(7, 1);lcd.print("*");delay(100);
         lcd.setCursor(8, 1);lcd.print("*");delay(100);
         lcd.setCursor(9, 1);lcd.print("*");delay(100);
         lcd.setCursor(10, 1);lcd.print("*");delay(100);
         lcd.setCursor(11, 1);lcd.print("*");delay(100);
         lcd.setCursor(12, 1);lcd.print("*");delay(100);
         lcd.setCursor(13, 1);lcd.print("*");delay(100);
         lcd.setCursor(14, 1);lcd.print("*");delay(100);
         lcd.setCursor(15, 1);lcd.print("*");delay(100);
         lcd.clear();
         }
void pHsensor()
{

  
  int buf[10];               
  for(int i=0;i<10;i++)       
  {
    buf[i]=analogRead(SensorPin);
    delay(10);
  }
  for(int i=0;i<9;i++)        
  {
    for(int j=i+1;j<10;j++)
    {
      if(buf[i]>buf[j])
      {
        int temp=buf[i];
        buf[i]=buf[j];
        buf[j]=temp;
      }
    }
  }
  avgValue=0;
  for(int i=2;i<8;i++)                     
    avgValue+=buf[i];
  float phValue=(float)avgValue*5.0/1024/6; 
  phValue=3.5*phValue+Offset;                      
  Serial.print("pH:"); 
  Serial.print(phValue,2);
  Serial.println(" ");
  digitalWrite(13, HIGH);      
  delay(800);
  digitalWrite(13, LOW);

  lcd.setCursor(0, 0);
  lcd.print("PH :");
  lcd.print(phValue);
  delay(100);
}
void ECsensor()
{

}