CircuitPython library for HD77480 LCD character displays with an I2C backpack. Currently PCF8574 is supported.
The original code started with the RPLCD library by Danilo Bargen, in https://github.com/dbrgn/RPLCD, but it has been reworked considerably.
Origin of both classes: https://github.com/dhalbert/CircuitPython_LCD
lcd/lcd.py is too big to use as .py. Use mpy-cross to convert the .py files into .mpy.
The LCD supports character LCDs using the HD77480 chip.
The interface to the LCD is separated into the LCD_I2C class. It inherits from the LCD class.
from lcd import LCD, LCD_I2C, CursorMode
# Create the I2C interface.
from busio import I2C
from board import SCL, SDA
i2c = I2C(SCL, SDA)
# Talk to the LCD at I2C address 0x27. Default is 0x3F
# lcd = LCD_I2C(i2c, address=0x27, num_rows=4, num_cols=20)
# The number of rows and columns defaults to 4x20, so those
# arguments could be omitted in this case.
lcd = LCD_I2C(i2c)
lcd.print("abc ")
lcd.print("This is quite long and will wrap onto the next line automatically.")
lcd.clear()
# Start at the second line, fifth column (numbering from zero).
lcd.set_cursor_pos(1, 4)
lcd.print("Here I am")
# Make the cursor visible as a line.
lcd.set_cursor_mode(CursorMode.LINE)