from machine import ADC, Pin, PWM
from time import sleep

pot = ADC(28)

servo = PWM(Pin(19))
servo.freq(50)

def set_angle(angle):
    duty = int(((angle / 180) * 2 + 0.5) / 20 * 65535)
    servo.duty_u16(duty)

while True:
    pot_val = pot.read_u16()
    angle = int(pot_val * 180 / 65535)
    print("pot value:", pot_val, "| Angle:", angle)
    set_angle(angle)
    sleep(0.05)