#define BLYNK_TEMPLATE_ID "TMPL6LaC83MXy"
#define BLYNK_TEMPLATE_NAME "Quickstart template"
#define BLYNK_AUTH_TOKEN "BtsLxyojV9hIOR4_e58in8XgitI3XjCx"
        
#include <WiFi.h>
#include <BlynkSimpleEsp32.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16, 2);
float calibration_value = 21.34;
int phval = 0; 
unsigned long int avgval; 
int buffer_arr[10],temp;

char auth[] = BLYNK_AUTH_TOKEN ; 
char ssid[] = "Wokwi-GUEST"; 
char pass[] = "";
void setup()
  {
 Serial.begin(9600);
  lcd.init(); 
  lcd.begin(16, 2);
  lcd.backlight();
  lcd.setCursor(0, 0);
  Blynk.begin(auth, ssid, pass);
}

void loop() {
 int analogValue = analogRead(32);
 for(int i=0;i<10;i++) 
 { 
 buffer_arr[i]=analogRead(32);
 delay(30);
 }
 for(int i=0;i<9;i++)
 {
 for(int j=i+1;j<10;j++)
 {
 if(buffer_arr[i]>buffer_arr[j])
 {
 temp=buffer_arr[i];
 buffer_arr[i]=buffer_arr[j];
 buffer_arr[j]=temp;
 }
 }
 }
 avgval=0;
 for(int i=2;i<8;i++)
 avgval+=buffer_arr[i];
 float volt=(float)avgval*5.0/4095/6;
 float ph_act = -5.70 * volt + calibration_value;
 lcd.setCursor(0, 0);
 lcd.print("  PH  =");
 lcd.setCursor(9, 0);
 lcd.print(ph_act);
 delay(1000);
 Blynk.run(); 
 Blynk.virtualWrite(V2,ph_act);
}