#include <Wire.h>
#include <hd44780.h>                        // main hd44780 header
#include <hd44780ioClass/hd44780_I2Cexp.h>  // i2c expander i/o class header

const uint8_t nbColonnes = 16;
const uint8_t nbLignes = 2;
hd44780_I2Cexp lcd;

const char lockBitmap[] PROGMEM = {
  0b01110,
  0b10001,
  0b10001,
  0b11111,
  0b11011,
  0b11011,
  0b11111,
  0b00000
};
const uint8_t lock = 0;

const char unlockBitmap[] PROGMEM = {
  0b01110,
  0b10000,
  0b10000,
  0b11111,
  0b11011,
  0b11011,
  0b11111,
  0b00000
};
const uint8_t unlock = 1;

const char OKBitmap[] PROGMEM = {
  0b00000,
  0b00001,
  0b00011,
  0b10110,
  0b11100,
  0b01000,
  0b00000,
  0b00000
};
const uint8_t OK = 2;

const char clocheBitmap[] PROGMEM = {
  0b00100,
  0b01110,
  0b01110,
  0b01110,
  0b11111,
  0b00000,
  0b00100,
  0b00000
};
const uint8_t cloche = 3;


void setup() {
  Serial.begin(115200);
  int result = lcd.begin(nbColonnes, nbLignes);
  if (result) {
    Serial.print("LCD initialization failed: ");
    Serial.println(result);
    hd44780::fatalError(result);
  }

  lcd.createChar(lock, lockBitmap);
  lcd.createChar(unlock, unlockBitmap);
  lcd.createChar(OK, OKBitmap);
  lcd.createChar(cloche, clocheBitmap);

  char buf[17];
  strcpy(buf, "codes : "); // on remplit les index de 0 à 7
  buf[8] = (char) lock;
  buf[9] = (char) unlock;
  buf[10] = (char) OK;
  buf[11] = (char) cloche;

  lcd.write(buf, 12); // on doit dire exactement combien de caractères prendre en compte

}

void loop() {}