#include <LiquidCrystal_I2C.h>

#define LCD_I2C_ADDR (0x27)
#define LCD_COLUMNS 20
#define LCD_LINES   4

LiquidCrystal_I2C lcd(LCD_I2C_ADDR, LCD_COLUMNS, LCD_LINES);

void setup() {
  lcd.init();
  lcd.backlight();
  image();
  lcd.setCursor(0, 0);
  lcd.print("Battery");
  lcd.setCursor(10, 0);
  lcd.print("Signal");
}

void loop() {}

// https://tusindfryd.github.io/screenduino/
void image() {
  lcd.clear();

  byte image1[8] = {B01111, B10000, B10111, B10111, B10111, B10111, B10000, B01111};
  byte image2[8] = {B11111, B00000, B11111, B11111, B11111, B11111, B00000, B11111};
  byte image3[8] = {B11111, B00000, B11111, B11111, B11111, B11111, B00000, B11111};
  byte image4[8] = {B11111, B00000, B00000, B00000, B00000, B00000, B00000, B11111};
  byte image5[8] = {B11100, B00010, B00010, B00001, B00001, B00010, B00010, B11100};
  byte image6[8] = {B00111, B00101, B00101, B00101, B00101, B00101, B00101, B00111};
  byte image7[8] = {B00000, B00000, B00111, B00101, B00111, B00111, B00111, B00111};
  byte image8[8] = {B00000, B00000, B00000, B00000, B00000, B00111, B00111, B00111};


  lcd.createChar(0, image1);
  lcd.createChar(1, image2);
  lcd.createChar(2, image3);
  lcd.createChar(3, image4);
  lcd.createChar(4, image5);
  lcd.createChar(5, image6);
  lcd.createChar(6, image7);
  lcd.createChar(7, image8);


  lcd.setCursor(0, 1);
  lcd.write(byte(0));
  lcd.setCursor(1, 1);
  lcd.write(byte(1));
  lcd.setCursor(2, 1);
  lcd.write(byte(2));
  lcd.setCursor(3, 1);
  lcd.write(byte(3));
  lcd.setCursor(4, 1);
  lcd.write(byte(4));
  lcd.setCursor(15, 1);
  lcd.write(byte(5));
  lcd.setCursor(14, 1);
  lcd.write(byte(6));
  lcd.setCursor(13, 1);
  lcd.write(byte(7));
}