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

LiquidCrystal_I2C lcd(0x27, 16, 2); // Set the I2C address and LCD dimensions

//const String bottomRowText = "Soumen's Playground";

// Custom battery icon characters
byte batteryIcons[5][8] = {
  {
    B11111,
    B10001,
    B10001,
    B10001,
    B10001,
    B10001,
    B10001,
    B11111
  },
  {
    B11111,
    B10001,
    B10001,
    B10001,
    B10001,
    B10001,
    B11111,
    B11111
  },
  {
    B11111,
    B10001,
    B10001,
    B10001,
    B10001,
    B11111,
    B11111,
    B11111
  },
  {
    B11111,
    B10001,
    B10001,
    B10001,
    B11111,
    B11111,
    B11111,
    B11111
  },
  {
    B11111,
    B10001,
    B10001,
    B11111,
    B11111,
    B11111,
    B11111,
    B11111
  }
  
};

void setup() {
  lcd.begin(16, 2); // Initialize the LCD
  for (int i = 0; i <= 5; ++i) {
    lcd.createChar(i, batteryIcons[i]); // Create custom characters for battery icons
  }
  lcd.backlight(); // Turn on the backlight
  lcd.setCursor(0, 0); // Set the cursor to the beginning
}

void loop() {
  displayBatteryAnimation(); // Call the function to display the battery animation on the upper row
  flashBottomRow();          // Call the function to flash text on the bottom row
}

void displayBatteryAnimation() {
  static int batteryLevel = 4;

  lcd.clear(); // Clear the LCD

  // Display the battery icon on the upper row
  lcd.setCursor(0, 0);
  lcd.write(byte(batteryLevel)); // Display the custom character based on battery level
  lcd.print(" ");

  // Update the battery level for animation
  batteryLevel = (batteryLevel - 1 + 5) % 5;

  delay(100); // Adjust the delay for the animation speed
}

void flashBottomRow() {
  lcd.setCursor(0, 1); // Set the cursor to the beginning of the bottom row
  //lcd.print(bottomRowText);
  delay(100); // Interval for flashing text
  lcd.clear(); // Clear the bottom row
  delay(100); // Interval for a blank display
}