#              .';:cc;.
#            .,',;lol::c.
#            ;';lddddlclo
#            lcloxxoddodxdool:,.
#            cxdddxdodxdkOkkkkkkkd:.
#          .ldxkkOOOOkkOO000Okkxkkkkx:.
#        .lddxkkOkOOO0OOO0000Okxxxxkkkk:
#       'ooddkkkxxkO0000KK00Okxdoodxkkkko
#      .ooodxkkxxxOO000kkkO0KOxolooxkkxxkl
#      lolodxkkxxkOx,.      .lkdolodkkxxxO.
#      doloodxkkkOk           ....   .,cxO;
#      ddoodddxkkkk:         ,oxxxkOdc'..o'
#      :kdddxxxxd,  ,lolccldxxxkkOOOkkkko,
#       lOkxkkk;  :xkkkkkkkkOOO000OOkkOOk.
#        ;00Ok' 'O000OO0000000000OOOO0Od.
#         .l0l.;OOO000000OOOOOO000000x,
#            .'OKKKK00000000000000kc.
#               .:ox0KKKKKKK0kdc,.
#                      ...
#
# Author: peppe8o
# Blog: https://peppe8o.com
# Date: Jun 3st, 2021
# Version: 1.0

from machine import Pin, PWM
from time import sleep

servoPin = PWM(Pin(16))
servoPin.freq(50)

def servo(degrees):
    # limit degrees beteen 0 and 180
    if degrees > 180: degrees=180
    if degrees < 0: degrees=0
    # set max and min duty
    maxDuty=9000
    minDuty=1000
    # new duty is between min and max duty in proportion to its value
    newDuty=minDuty+(maxDuty-minDuty)*(degrees/180)
    # servo PWM value is set
    servoPin.duty_u16(int(newDuty))

while True:
  # start increasing loop
  for degree in range(0,180,1):
    servo(degree)
    sleep(0.001)
    print("increasing -- "+str(degree))
  # start decreasing loop
  for degree in range(180, 0, -1):
    servo(degree)
    sleep(0.001)
    print("decreasing -- "+str(degree))