#include <LiquidCrystal_I2C.h>


LiquidCrystal_I2C lcd(0x27, 16, 2); // I2C address 0x27, 16 column and 2 rows

void setup() {
  lcd.init(); // initialize the lcd
  lcd.backlight();
  Serial.begin(115200);
  pinMode(4, INPUT);
}

void loop() {
  int16_t j = analogRead(4);
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("CO2: ");
  lcd.print(analogRead(4));
  lcd.setCursor(9, 0);
  lcd.print("ppm");
  delay(500);      // print message at (0, 0)
  lcd.setCursor(5, 1);      // move cursor to   (2, 1)
  lcd.print("EC Dept"); // print message at (2, 1)
  delay(2000);                  // display the above for two seconds

Serial.print("Analog: ");
Serial.println(analogRead(4));
  delay(100);

}