import time,math
from machine import Pin,PWM,ADC,I2C,SoftI2C
from pico_i2c_lcd import I2cLcd


i2c=SoftI2C(sda=Pin(26),scl=Pin(21),freq=40000)
lcd_address=i2c.scan()[0]
lcd=I2cLcd(i2c,lcd_address,2,16)
led=PWM(Pin(0))
led.freq(1000)
x=0
pot=ADC(Pin(28))

while True:
    val=pot.read_u16();
    volt=round((3.3/65535)*val,2)
    percent=int(val/65535*100)
    lcd.move_to(0,0)
    lcd.putstr(str(percent)+"%")
    led.duty_u16(val);
    time.sleep(0.6)
    lcd.clear()