# https://docs.micropython.org/en/latest/esp8266/tutorial/pwm.html
# On the ESP8266 the pins 0, 2, 4, 5, 12, 13, 14 and 15 all support PWM.
# The limitation is that they must all be at the same frequency, 
#  and the frequency must be between 1Hz and 1kHz.

from machine import Pin, PWM
from time import sleep

red = Pin(12)
pwm_red = PWM(red)
freq = 1
pwm_red.freq(freq)
pwm_red.duty(1)    # maximaler Wert 1023
print(pwm_red.duty(), pwm_red.freq())
  # pwm_redt()
sleep(10*freq)
duty_cycle = 1
freq = 10
pwm_red.freq(freq)
while True:
  print("a:")
  for i in range(1,1023+64,64):
    pwm_red.duty(i)
    print(i, end=" ")
    sleep(1)
  
  print("b:")
  for i in range(1023,-1,-64):
    pwm_red.duty(i)
    print(i,end=" ")
    sleep(0.5)