#include <LiquidCrystal_I2C.h>

// Initialize the LCD screen
LiquidCrystal_I2C lcd(0x27, 16, 2);

// Define the analog pin for voltage measurement
const int voltagePin = A0;

void setup() {
  // Initialize the LCD screen
  lcd.begin(16, 2);
  lcd.backlight();

  // Set up the voltage pin as an input
  pinMode(voltagePin, INPUT);
}

void loop() {
  // Read the voltage from the analog pin
  int rawValue = analogRead(voltagePin);

  // Convert the raw value to voltage (assuming 5V reference)
  float voltage = rawValue * (100 / 1023.0);

  // Display the voltage on the LCD screen
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Nitrogeno:");
  lcd.print(voltage);
  lcd.print("m3");

  // Wait for a short delay before updating the display
  delay(500);
}