from lcdi2c import*
from machine import ADC

lcd_start()
adc = ADC(Pin(26))     # create ADC object on ADC pin
       
while 1:
    adc_val=adc.read_u16()         # read value, 0-65535 across voltage range 0.0v - 3.3v
    cmd_wrt(0x80)
    string_write("val:")
    string_write(str(zfl_0(adc_val,5)))
    cmd_wrt(0xc0)
    string_write("val:")
    string_write(str(zfl_0(adc_val*3.30/65535,5)))
    string_write(" v")
    sleep(0.2)