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

#define INLENGTH 20 
#define INTERMINATOR 10 

char inString[INLENGTH + 1]; 

int inCount;

LiquidCrystal_I2C lcd (0x27, 16, 2);

void setup() {
  load();
}

void loop() {

  inCount = 0;

  do {
    while (Serial.available() == 0);

    inString [inCount] = Serial.read();
    if (inString[inCount] == INTERMINATOR) break;
  } while (++inCount < INLENGTH);

  inString[inCount] = 0;
  Serial.println(inString);

  if (strcmp(inString, "Призвіще") == 0)
        show_name();
  else if (strcmp(inString, "Група") == 0)
            show_group();
  else 
    Serial.println("Unknown command");
  
}

void show_group()
{
  byte g_UA[8] = {
      0b00000,
      0b11110,
      0b10000,
      0b10000,
      0b10000,
      0b10000,
      0b10000,
      0b00000
  };
  byte p_UA[8] = {
      0b00000,
      0b00000,
      0b11111,
      0b10001,
      0b10001,
      0b10001,
      0b10001,
      0b00000
  };

  lcd.createChar(0, g_UA);
  lcd.createChar(1, p_UA);

  lcd.clear();         
  lcd.setCursor(0, 0); 

  lcd.write(byte(0));
  lcd.print("py");
  lcd.write(byte(1));
  lcd.print("a: IP - 31");
}

void show_name() {
  byte B_ua[8] = {
      0b00000,
      0b00000,
      0b11100,
      0b10010,
      0b11100,
      0b10010,
      0b11100,
      0b00000
  };
  byte t_ua[8] = {
      0b00000,
      0b00000,
      0b11111,
      0b00100,
      0b00100,
      0b00100,
      0b00100,
      0b00000
  };
  byte U_ua[8] = {
      0b00000,
      0b00000,
      0b10001,
      0b10011,
      0b10101,
      0b11001,
      0b10001,
      0b00000
  };
  byte M_ua[8] = {
      0b00000,
      0b00000,
      0b10001,
      0b11011,
      0b10101,
      0b10001,
      0b10001,
      0b00000
  };

  lcd.createChar(0, t_ua);
  lcd.createChar(1, B_ua);
  lcd.createChar(2, U_ua);
  lcd.createChar(3, M_ua);

  lcd.clear();         
  lcd.setCursor(0, 0); 
  
  lcd.print('K');     
  delay(55);
  lcd.print("o");   
  delay(55);
  lcd.write(byte(0));  
  delay(55);
  lcd.print("o"); 
  delay(55);
  lcd.write(byte(1));  
  delay(55);
  lcd.print(" M"); 
  delay(55);
  lcd.print("a");
  delay(55);
  lcd.print("k");
  delay(55);
  lcd.print("c");
  delay(55);
  lcd.write(byte(2));
  delay(55);
  lcd.write(byte(3));
}

void load()
{
  byte load_char[8] = {
      0b11111,
      0b11111,
      0b11111,
      0b11111,
      0b11111,
      0b11111,
      0b11111,
      0b11111
  };
  lcd.init();
  lcd.backlight ();
  lcd.createChar(0, load_char);
  lcd.clear();
  lcd.setCursor(0,0);
  for(int i = 0; i <= 16; i++)
  {
    lcd.setCursor(i,0);
    lcd.write(byte(0));
    lcd.setCursor(i,1);
    lcd.write(byte(0));
    delay(60);
  }

  lcd.clear();
  lcd.setCursor(1,0);
  lcd.print("Arduino Serial");
  lcd.setCursor(5,1);
  lcd.print("Read");
  Serial.begin(9600);
  Serial.println("Введіть призвіще, для виводу призвіща та ім'я, або група, для виводу номера групи");
}