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

i2c = SoftI2C(sda=Pin(26),scl=Pin(21),freq=400000)
lcd = I2cLcd(i2c,i2c.scan()[0],2,16)
pot = ADC(28)

def perc_to_hex(n):
    return int(n/100*65535)


def freq_change_buzzer(l,r):
    pot_val = pot.read_u16()
    percent = int(pot_val/65535*100)
    fre = l + int(percent*(r-l)/100)
    load = PWM(Pin(0))
    load.freq(fre)
    load.duty_u16(perc_to_hex(25))
    lcd.putstr("Freq: "+str(fre)+" percent: "+str(percent)+"%")
    time.sleep(1)
    lcd.clear()

def voltage_change_bulb():
    pot_val = pot.read_u16()
    volt = round((3.3/65535)*pot_val,2)
    percent = int(pot_val/65535*100)
    load = PWM(Pin(0))
    load.freq(1000)
    load.duty_u16(pot_val)
    lcd.putstr("Volt: "+str(volt)+" percent: "+str(percent)+"%")
    time.sleep(1)
    lcd.clear()

while True:
    voltage_change_bulb()
    freq_change_buzzer(2000,4000)