from machine import Pin, I2C, Timer
from pico_i2c_lcd import I2cLcd

sda = Pin(0)
scl = Pin(1)

i2c = I2C(0, sda=sda, scl=scl, freq=40000)

devices = i2c.scan()

if len(devices) <= 0:
  print("No devices found!")
else:
  print(hex(devices[0]))

i2c_addr = devices[0]

lcd = I2cLcd(i2c, i2c_addr, 2, 16)

num = 0
def fn(timer):
    global num
    lcd.clear()
    lcd.putstr(str(num))
    num += 1

timer = Timer(freq=1, mode=Timer.PERIODIC, callback=fn)