from machine import Pin, SoftI2C, ADC
from pico_i2c_lcd import I2cLcd
from time import sleep

I2C_ADDR = 0x27
I2C_NUM_ROWS = 2
I2C_NUM_COLS = 16
val_adc = ADC(26)
sw = Pin(9, Pin.IN, Pin.PULL_UP)

i2c = SoftI2C(sda=Pin(4), scl=Pin(5), freq=200000)
lcd = I2cLcd(i2c, I2C_ADDR, I2C_NUM_ROWS, I2C_NUM_COLS)

lcd.putstr(str("HELLO"))
while 1:
  if not(sw.value()):
    reading_val = val_adc.read_u16()
    print(reading_val)
    lcd.clear()
    lcd.putstr(str(reading_val))
    sleep(4)
    lcd.clear()
    lcd.putstr(str("HELLO"))