import machine
import utime

servo_pin = machine.Pin(15, machine.Pin.OUT) 

servo = machine.PWM(servo_pin)
servo.freq(50) 


angle_min = 0  
angle_max = 180  


pulse_min = 500
pulse_max = 2500

def set_angle(angle):
    
    pulse_width = int((angle / 180) * (pulse_max - pulse_min) + pulse_min)
    servo.duty_ns(pulse_width * 1000)
while True:
    for angle in range(angle_min, angle_max + 1, 10):
        set_angle(angle)
        utime.sleep_ms(100)

    for angle in range(angle_max, angle_min - 1, -10):
        set_angle(angle)
        utime.sleep_ms(100)