from time import sleep

from machine import Pin

from machine import PWM

pwm = PWM(Pin(3))

pwm.freq(50)

#Function to set an angle

#The position is expected as a parameter

def setServoCycle (position):

    pwm.duty_u16(position)

    sleep(0.01)

while True:

    for pos in range(1000,5000,50):

        setServoCycle(pos)

    for pos in range(5000,1000,-50):

        setServoCycle(pos)