#include  <LiquidCrystal_I2C.h>
int PH = A0;
LiquidCrystal_I2C lcd_1(0x27, 16, 2);
void setup() {
  pinMode(PH, INPUT);
  Serial.begin(9600);

  lcd_1.init();
  pinMode(A0, INPUT);

  lcd_1.print("PH Tester");
  delay(1000); // Wait for 1000 millisecond(s)
}

void loop()
{ int PH1 = analogRead(PH);
  int PH2 = map(PH1,0,1023,0,14);
  Serial.println(PH2);
  delay(500);

  lcd_1.clear();
  lcd_1.setCursor(0, 0);
  lcd_1.print("PH level:");
  if (PH2 < 6) {
    lcd_1.setCursor(0, 1);
    lcd_1.print("Low");
    }
  else if (PH2 >= 6 && PH2 <= 9) {
      lcd_1.setCursor(4, 1);
      lcd_1.print("Mid");
      }
  else if (PH2 >= 10) {
        lcd_1.setCursor(7, 1);
        lcd_1.print("High");
      }
  
  delay(500); // Wait for 5000 millisecond(s)
}