from machine import Pin,PWM
import time 

MG966R = PWM(Pin(2, mode=Pin.OUT))
MG966R.freq(50)

#0.5ms/20ms = 0.025 = 2.5% duty cycle
#2.4ms/20ms = 0.12 = 12% duty cycle

#0.025*1024=25.6
#0.12*1024=122.88

while True:
    MG966R.duty(26)
    time.sleep(1)
    MG966R.duty(123)
    time.sleep(1)