sendTextLCD method
Sends text to be displayed on the LCD screen.
text: The text to display on the LCD.
size: The size of the text.
fill: Whether the text should fill the screen.
Returns a String indicating the result or null if unsuccessful.
Implementation
Future<String?> sendTextLCD(
{required String text, required int size, required bool fill}) async {
return await SunmiLcd.lcdString(text, size: size, fill: fill);
}