#include <LiquidCrystal_I2C.h> // Include LiquidCrystal_I2C library for I2C LCD

const int ledPin = 13;      // LED connected to pin 13
const int potPin = 0;       // Potentiometer connected to analog pin 0

const int lcd_address = 0x27; // I2C address of your LCD (check datasheet)
LiquidCrystal_I2C lcd(lcd_address, 16, 2); // Initialize I2C LCD (address, columns, rows)

int potValue;      // Variable to store potentiometer reading
int blinkRate;     // Variable to store calculated blink rate (in Hz)
int blinkCount = 0; // Variable to count blinks

void setup() {
  pinMode(ledPin, OUTPUT); // Set LED pin as output
  lcd.init();              // Initialize I2C LCD communication
  lcd.backlight();         // Turn on LCD backlight (optional)
  lcd.clear();            // Clear LCD display
}

void loop() {
  potValue = analogRead(potPin); // Read analog value from potentiometer

  // Map the potentiometer value to a blinking delay (e.g., 10ms to 1000ms)
  int delayTime = map(potValue, 0, 1023, 10, 1000);

  // Calculate blink rate (assuming delayTime represents milliseconds)
  blinkRate = 1000 / delayTime;

  digitalWrite(ledPin, HIGH);  // Turn LED on
  delay(delayTime);            // Delay based on potentiometer value
  digitalWrite(ledPin, LOW);   // Turn LED off
  delay(delayTime);            // Delay based on potentiometer value
  blinkCount++;                 // Increment blink count after each blink cycle

  lcd.setCursor(0, 0);          // Set cursor position on LCD (top-left)
  lcd.print("Blink Rate:");    // Display "Blink Rate:" text
  lcd.print(blinkRate);        // Display calculated blink rate
  lcd.print(" Hz");            // Display "Hz" unit

  lcd.setCursor(0, 1);          // Set cursor position on LCD (second row)
  lcd.print("Blinks:");         // Display "Blinks:" text
  lcd.print(blinkCount);        // Display current blink count
}