Once you've finished setting up your ItsyBitsy with CircuitPython, you can access the code and necessary libraries by downloading the Project Bundle.

To do this, click on the Download Project Bundle button in the window below. It will download as a zipped folder.

# SPDX-FileCopyrightText: 2021 Phil Burgess for Adafruit Industries
#
# SPDX-License-Identifier: MIT

"""
Lola Droid Shoulder Robot with servo and NeoPixel
"""

# pylint: disable=import-error
import time
import random
import board
import pwmio
import neopixel
from adafruit_motor import servo
from adafruit_led_animation.animation.comet import Comet
from adafruit_led_animation.animation.SparklePulse import SparklePulse
from adafruit_led_animation.sequence import AnimationSequence
from adafruit_led_animation.color import RED, BLUE

PIXEL_PIN = board.D5
SERVO_PIN = board.A2
NUM_PIXELS = 12
ORDER = neopixel.GRB
BRIGHTNESS = 0.1

# Initialize servo
PWM = pwmio.PWMOut(SERVO_PIN, frequency=50)
SERVO = servo.Servo(PWM)

# Initialize NeoPixels and animations
PIXELS = neopixel.NeoPixel(PIXEL_PIN, NUM_PIXELS, auto_write=False,
                           pixel_order=ORDER)
LARSON = Comet(PIXELS, bounce=True, speed=0.6/NUM_PIXELS,
               tail_length=NUM_PIXELS//2,
               color=(RED[0] * BRIGHTNESS,  # This is a little faster than
                      RED[1] * BRIGHTNESS,  # using the NeoPixel brightness
                      RED[2] * BRIGHTNESS)) # setting.
SPARKLE = SparklePulse(PIXELS, period=2, speed=0.15,
                       max_intensity=BRIGHTNESS, color=BLUE)
ANIMATIONS = AnimationSequence(LARSON, SPARKLE, advance_interval=7,
                               auto_clear=False)

SERVO.angle = POSITION = NEXT_POSITION = 7
MOVING = False                # Initial state = paused
START_TIME = time.monotonic() # Initial time
DURATION = 1.0                # Hold initial position for 1 sec

while True: # Loop forever...

    # Move turret -- randomly looks around and pauses
    NOW = time.monotonic()
    ELAPSED = NOW - START_TIME # Seconds since start of motion or pause
    if ELAPSED >= DURATION:    # End motion/pause?
        MOVING = not MOVING    # Toggle between those two states
        START_TIME = NOW       # and record the new starting time
        ELAPSED = 0.0
        if MOVING:             # Switching from paused to moving
            POSITION = NEXT_POSITION
            while abs(POSITION - NEXT_POSITION) < 10:  # Min +/- 10 degrees
                NEXT_POSITION = random.uniform(0, 90) # Try, try again
            DURATION = 0.2 + 0.6 * abs(POSITION - NEXT_POSITION) / 80
        else:                  # Switching from moving to paused
            SERVO.angle = NEXT_POSITION         # Move to end of sweep
            DURATION = random.uniform(0.5, 2.5) # Pause time
    if MOVING:
        FRACTION = ELAPSED / DURATION                        # Linear 0 to 1
        FRACTION = (3 * FRACTION ** 2) - (2 * FRACTION ** 3) # Ease in/out
        SERVO.angle = POSITION + (NEXT_POSITION - POSITION) * FRACTION

    ANIMATIONS.animate() # Cycle through NeoPixel animations

Upload the Code and Libraries to the ItsyBitsy

After downloading the Project Bundle, plug your board into the computer's USB port with a known good USB data+power cable. You should see a new flash drive appear in the computer's File Explorer or Finder (depending on your operating system) called CIRCUITPY. Unzip the folder and copy the following items to the PyPortal's CIRCUITPY drive. 

  • lib folder
  • code.py

Your PyPortal CIRCUITPY drive should look like this after copying the lib folder and the code.py file.

This guide was first published on Jul 05, 2022. It was last updated on 2022-07-05 22:35:39 -0400.

This page (Code) was last updated on Oct 02, 2022.

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