print("Hello, ESP32!")
from machine import Pin, PWM
from time import sleep

servo = PWM(Pin(23), freq=50)
#def map_s (x):
#    return int ((x - 0) * (130 - 30)/(180 - 0) + 30)

while 1:
    for i in range (26,130):
        servo.duty(i)
        sleep(.1)

    for i in range (130, 26, -1):
        servo.duty(i)
        sleep(.1)