#CIRC04 control a servo
# from https://learn.adafruit.com/circuitpython-essentials/circuitpython-servo

import time
import board
import pulseio
from adafruit_motor import servo

# create a PWMOut object on Pin A2.
#pwm = pulseio.PWMOut(board.D6, duty_cycle=2 ** 15, frequency=50)   # GrandCentral
pwm = pulseio.PWMOut(board.A2, duty_cycle=2 ** 15, frequency=50)    # CircuitPlaygroundExpress

# Create a servo object, my_servo.
my_servo = servo.Servo(pwm)

while True:
  for angle in range(0, 180, 5):  # 0 - 180 degrees, 5 degrees at a time.
    my_servo.angle = angle
    time.sleep(0.5)

  for angle in range(180, 0, -5): # 180 - 0 degrees, 5 degrees at a time.
    my_servo.angle = angle
    time.sleep(0.5)