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

// Initialize the LCD with I2C address 0x27, 20 columns, and 4 rows
LiquidCrystal_I2C lcd(0x27, 20, 4);

// Initialize the Servo
Servo myServo;

// Define the pins
const int potPin = A0; // Potentiometer connected to A0
const int servoPin = 9; // Servo connected to pin 9

void setup() {
  // Initialize the Serial Monitor
  Serial.begin(9600);

  // Initialize the LCD
  lcd.init();
  lcd.backlight();
  
  // Attach the servo to the pin
  myServo.attach(servoPin);

  // Display initial message on the LCD
  lcd.setCursor(0, 0);
  lcd.print("Pot Voltage: ");
  lcd.setCursor(0, 1);
  lcd.print("Angle:       ");
}

void loop() {
  // Read the potentiometer value (0-1023)
  int potValue = analogRead(potPin);
  
  // Convert the potentiometer value to voltage
  float voltage = potValue * (5.0 / 1023.0); // Assuming a 5V reference
  
  // Map the potentiometer value to servo angle (0-180)
  int servoAngle = map(potValue, 0, 1023, 0, 180);
  servoAngle = constrain(servoAngle, 0, 180);
  
  // Set the servo position
  myServo.write(servoAngle);
  
  // Display the potentiometer voltage and servo angle on the LCD
  lcd.setCursor(12, 0);
  lcd.print("     "); // Clear previous value
  lcd.setCursor(12, 0);
  lcd.print(voltage, 2); // Display voltage with 2 decimal places

  lcd.setCursor(12, 1);
  lcd.print("     "); // Clear previous value
  lcd.setCursor(12, 1);
  lcd.print(servoAngle); // Display servo angle

  // Print the values to the Serial Monitor for debugging
  Serial.print("Potentiometer Voltage: ");
  Serial.print(voltage, 2);
  Serial.print(" V, Servo Angle: ");
  Serial.println(servoAngle);
  
  // Delay for a moment
  delay(500); // Update every half a second
}