from machine import Pin,PWM
import time

servo_pin = Pin(23,Pin.OUT)
pwm = PWM(servo_pin)

pwm.freq(50)

while True:
  pwm.duty(25)
  print(f'0 [deg]')
  time.sleep(2)
  pwm.duty(122)
  print(f'180 [deg]')
  time.sleep(2)

'''
    
  pwm signal:
  0   [degree] = {'1': 0.5[msec]}
  180 [degree] = {'1': 2.4[msec]}
  period = 20[msec]

  duty = 0.5/20 = 0.025 | Timer_value = duty*1024 = 0.025 * 1024 = 25.6 ~ 25
  duty = 2.4/20 = 0.12  | Timer_value = duty*1024 = 0.12  * 1024 = 122.88 ~ 122
  
'''