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

LiquidCrystal_I2C lcd(0x27, 20, 4); // Address 0x27, 20 columns, 4 rows

const int analogInputPin = A0; // Analog input pin for the microphone sensor
const int graphWidth = 19;    // Width of the bar graph

byte G[8] = {
  B11111,
  B00000,
  B11111,
  B11111,
  B11111,
  B11111,
  B00000,
  B11111
};
byte T[8] = {
  B11000,
  B11100,
  B11110,
  B11111,
  B11111,
  B11110,
  B11100,
  B11000
};

void setup() {
  lcd.begin(20, 4);  // Initialize the LCD
  lcd.createChar(1, G);
  lcd.createChar(2, T);
  lcd.clear();
  lcd.print("  Arduino VU Meter");
  delay(2000);
}

void loop() {


  displayVolume();

  //delay(100); // Adjust the delay based on your application
}

void displayVolume() {
  int sensorValue = analogRead(analogInputPin);
  int volume = map(sensorValue, 0, 1023, 3, 20);
  lcd.setCursor(0, 3);
  lcd.print("VU ");
  lcd.setCursor(volume + 1, 3);
  for (int i = volume; i < 20; i++) {
    lcd.write(byte(0));
  }
  lcd.setCursor(3, 3);
  for (int i = 3; i < volume; i++) {
    if (i != volume - 1) {
      lcd.write(1);
    } else {
      lcd.write(2);
    }
  }
}