I2C LCD controller library for AQM1602. I created pip library, so prease use it. https://github.com/asukiaaa/asukiaaa_py_i2c_lcd

I2cLcd.py

import smbus

I2C_BUS_NUM = 1
I2C_LCD_ADDR = 0x3e

LCD_SET_DDRAM_ADDR = 0x80

class I2cLcd:
  i2c = ""
  address = ""
  register_setting = 0x00
  register_display = 0x40
  col_num = 16

  def __init__(self, bus_num, address):
    self.address = address
    self.i2c = smbus.SMBus(bus_num)
    # init
    self.i2c.write_i2c_block_data( self.address, self.register_setting, [0x38, 0x39, 0x14, 0x70, 0x56, 0x6c] )
    self.i2c.write_i2c_block_data( self.address, self.register_setting, [0x38, 0x0c, 0x01] )

  def setCursor(self, col, row):
    row_offset = [ 0x00, 0x40 ]
    self.i2c.write_byte_data( self.address, self.register_setting, LCD_SET_DDRAM_ADDR | (col + row_offset[row]) )

  def write(self, str):
    counter = 0
    for c in list(str):
      self.i2c.write_byte_data( self.address, self.register_display, ord(c) )
      counter += 1
      if counter >= self.col_num:
        break

if __name__ == "__main__":
  lcd = I2cLcd(I2C_BUS_NUM, I2C_LCD_ADDR)
  lcd.setCursor(0,0)
  lcd.write("Hello")
  lcd.setCursor(3,1)
  lcd.write("World")