from machine import Pin,ADC
from gpio_lcd import GpioLcd
import time

lcd = GpioLcd(rs_pin=Pin(16),
          enable_pin=Pin(17),
          d4_pin=Pin(18),
          d5_pin=Pin(19),
          d6_pin=Pin(20),
          d7_pin=Pin(21),
          num_lines=2,
          num_columns=16
          )

v = ADC(Pin(28))
while 1:
    value = v.read_u16()
    volt = value * (5 / 65535)
                    
    lcd.clear()
    lcd.move_to(0, 0)
    lcd.putstr("ADC: " + str(value))
                                        
    lcd.move_to(0, 1)
    lcd.putstr("Volt: " + str(round(volt, 2)) + "V")
                                                    
    time.sleep(1)