#include <Wire.h>
#include <LiquidCrystal_I2C.h>

#define LDR_PIN 15 // Analog pin connected to LDR

LiquidCrystal_I2C lcd(0x27, 16, 2); // Adjust the address if necessary

void setup() {
  lcd.init();
  lcd.backlight();

  lcd.setCursor(0, 0);
  lcd.print("Light Intensity:");

  Serial.begin(115200); // Optional for debugging
}

void loop() {
  int ldrValue = analogRead(LDR_PIN); // Read LDR value (0-4095)

  // Convert to voltage (ESP32 ADC is 12-bit, 3.3V reference)
  float voltage = (ldrValue / 4095.0) * 3.3;

  // Display LDR value on LCD
  lcd.setCursor(0, 1);
  lcd.print("LDR: ");
  lcd.print(voltage);
  lcd.print(" V "); // Update value in volts

  delay(1000); // Delay for 1 second
}