#include <LiquidCrystal_I2C.h>
// ... (other includes and pin definitions remain)
LiquidCrystal_I2C lcd(0x27, 20, 4);

void setup() {
  Serial.begin(9600);
  lcd.init();
  lcd.backlight();
}

void loop() {
  // Simulate sensor readings
  float solar_volt = analogRead(2) * 0.0033;
  float bat_volt = analogRead(4) * 0.0033;

  lcd.setCursor(0,0);
  lcd.print("Solar: ");
  lcd.print(solar_volt);
  lcd.setCursor(0,1);
  lcd.print("Battery: ");
  lcd.print(bat_volt);

  Serial.print("Solar V: ");
  Serial.println(solar_volt);
  Serial.print("Battery V: ");
  Serial.println(bat_volt);

  delay(1000);
}