#include <LiquidCrystal_I2C.h>

#define LDR_PIN 34

LiquidCrystal_I2C lcd(0x27, 16, 2);   //choosing lcd 16x2

void setup() {
  lcd.init();        //initializing the lcd
  lcd.backlight();   
}

void loop() {
  int ldrValue = analogRead(LDR_PIN);
  float voltage = ldrValue * (3.3 / 4095.0);
  
  Serial.print("LDR Value: ");
  Serial.println(ldrValue);
  Serial.print(" - Voltage: ");
  Serial.println(voltage);
  
 lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Light level: ");
lcd.print(ldrValue); 
  
lcd.setCursor(0, 1);
lcd.print("Volt: ");
lcd.print(voltage, 2); 

  
  delay(500);
}