// With the hd44780 library.
// Using example:
// https://github.com/duinoWitchery/hd44780/blob/master/examples/ioClass/hd44780_I2Cexp/HelloWorld/HelloWorld.ino
//
// Similar project with an Arduino Uno:
//   https://wokwi.com/projects/453451078117780481


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

hd44780_I2Cexp lcd;

char BluePill[] = "You take the Blue Pill, the story ends, you wake up in your bed and believe whatever you want to believe.";

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

void setup()
{
  Serial.begin(115200);
  Serial.print("SDA is assigned to pin ");
  Serial.println(SDA);
  Serial.print("SCL is assigned to pin ");
  Serial.println(SCL);

  Wire.begin();
  delayMicroseconds(30);

  Serial.print("Scanning I2C bus: ");
  bool found = false;
  for(int address=1; address<128; address++)
  {
    Wire.beginTransmission(address);
    if(Wire.endTransmission() == 0)
    {
       Serial.print("0x");
       if(address < 0x10)
         Serial.print("0");
       Serial.print(address,HEX);
       Serial.print(", ");
       found = true;
    }
  }

  if(!found)
    Serial.print("Nothing found");
  Serial.println();
  
  int status = lcd.begin(LCD_COLS, LCD_ROWS);
	if(status) // non zero status means it was unsuccesful
	{
    Serial.println("Error, display not found");
		// hd44780 has a fatalError() routine that blinks an led if possible
		// begin() failed so blink error code using the onboard LED if possible
		hd44780::fatalError(status); // does not return
	}

  Serial.println("No error. Print something on LCD display.");
	lcd.print("Hello");
}

void loop() {}