#include <Wire.h>
#include <LiquidCrystal.h>

// Define the pin where the potentiometer is connected
#define POT_PIN A0 // GP26 corresponds to ADC0

// Initialize the LCD, set the I2C address to 0x27, and the dimensions to 16 columns by 2 rows
LiquidCrystal lcd(28, 27, 22, 6, 21, 20);

void setup() {
  // Initialize serial communication at 9600 baud rate
  Serial.begin(9600);

  // Initialize the LCD
  lcd.begin(16, 2);

  // Turn on the backlight of the LCD
  //lcd.backlight();

  // Print a message to the LCD
  lcd.setCursor(0, 0);
  lcd.print("Voltage: ");
}

void loop() {
  // Read the analog value from the potentiometer
  int analogValue = analogRead(POT_PIN);

  // Convert the analog value (0-4095) to voltage (0-3.3V)
  float voltage = analogValue * (3.3 / 4095.0);

  // Print the analog value and the corresponding voltage to the Serial Monitor
  Serial.print("Analog Value: ");
  Serial.print(analogValue);
  Serial.print(" | Voltage: ");
  Serial.print(voltage);
  Serial.println(" V");

  // Display the voltage on the LCD
  lcd.setCursor(0, 1); // Set cursor to the beginning of the second line
  lcd.print("          "); // Clear the previous voltage reading
  lcd.setCursor(0, 1);
  lcd.print(voltage, 2); // Print voltage with 2 decimal places
  lcd.print(" V");

  // Wait a bit before the next loop
  delay(500);
}