import time
time.sleep(0.1) # Wait for USB to become ready
from machine import I2C, Pin

# PCF8574 on 0x50
I2C_ADDR = 0x27    # DEC 39, HEX 0x27
NUM_ROWS = 2
NUM_COLS = 16

# define custom I2C interface, default is 'I2C(0)'
# check the docs of your device for further details and pin infos
i2c = I2C(0,scl=Pin(1,Pin.OUT),sda=Pin(0,Pin.OUT),freq=800000)
lcd = LCD(addr=I2C_ADDR,cols=NUM_COLS,rows=NUM_ROWS,i2c=i2c)

lcd.begin()
lcd.print("Hello World")