// Quick and Dirty tests:
//   The normal hd44780 works on the pins that are defined with Wire.begin().
//   The "Adafruit LiquidCrystal" can work with Wire and Wire1, but does
//   not seem compatible with the Wokwi display.
//
//   Using a include that has no Wire.begi()) and uses _WIRE_
//
// Forum: https://forum.arduino.cc/t/20x2-display-with-hd44780-with-second-i2c-bus/1187177/7
// This Wokwi project: https://wokwi.com/projects/380942943314336769

#include <Wire.h>
#include <hd44780.h>              // the well maintained LCD library
//#include <hd44780ioClass/hd44780_I2Cexp.h>

// Select the I2C bus, try Wire and Wire1
//#define _WIRE_ Wire
#define _WIRE_ Wire1
#include "hd44780_I2Cexp_test.h"

#include <LiquidCrystal_I2C.h>    // the old library for 'Wire'

#include <U8g2lib.h>              // A modern OLED library

const int LCD_COLS = 16;
const int LCD_ROWS = 2;

hd44780_I2Cexp lcd1(0x30,LCD_COLS,LCD_ROWS);  // set specific address
hd44780_I2Cexp lcd2(0x32,LCD_COLS,LCD_ROWS);  // set specific address
hd44780_I2Cexp lcd3(0x34,LCD_COLS,LCD_ROWS);  // set specific address

LiquidCrystal_I2C lcd4(0x30, LCD_COLS, LCD_ROWS);
LiquidCrystal_I2C lcd5(0x32, LCD_COLS, LCD_ROWS);
LiquidCrystal_I2C lcd6(0x34, LCD_COLS, LCD_ROWS);

U8X8_SSD1306_128X64_NONAME_HW_I2C display(U8X8_PIN_NONE);

void setup()
{
  // Do not call Wire.begin() if it is already called.
  Wire.begin(4,15);    // SDA, SCL
  Wire1.begin(25,26);  // SDA, SCL

  int status1 = lcd1.begin(LCD_COLS, LCD_ROWS);
  int status2 = lcd2.begin(LCD_COLS, LCD_ROWS);
  int status3 = lcd3.begin(LCD_COLS, LCD_ROWS);

  lcd4.init();
  lcd4.backlight();
  lcd5.init();
  lcd5.backlight();
  lcd6.init();
  lcd6.backlight();

  display.begin();
  display.setPowerSave(0);
  // This font is (too) small.
  display.setFont(u8x8_font_pxplusibmcgathin_f);

  lcd1.setCursor(0, 0);  // column, row
  lcd1.print( "Hello Display 1");

  lcd2.setCursor(0, 0);  // column, row
  lcd2.print( "Hello Display 2");

  lcd3.setCursor(0, 0);  // column, row
  lcd3.print( "Hello Display 3");

  lcd4.setCursor(0, 0);
  lcd4.print("Hello Display 4");

  lcd5.setCursor(0, 0);
  lcd5.print("Hello Display 5");

  lcd6.setCursor(0, 0);
  lcd6.print("Hello Display 6");

  display.setCursor(0,7);
  display.print("Hello OLED");
}

void loop() 
{ 
  delay(10); 
}