CircuitPython Install Check

You should ensure you have CircuitPython 6.1.0 or greater on your board. Plug your board in with a known good data + power cable (not the cheesy USB cable that comes with USB power packs, they are power only). You should see a new flash drive pop up.

If the drive loads, then open the boot_out.txt file to ensure the version number is 6.1.0 or greater. 

Adafruit CircuitPython 6.1.0-beta.1 on 2020-11-20; Metro ESP32S2 with ESP32S2

Add Font

Download the font file below and add it to the root of the CircuitPython drive.

Required Libraries 

  • adafruit_framebuf.mpy
  • adafruit_io
  • adafruit_led_animation
  • adafruit_pixel_framebuf.mpy
  • adafruit_requests.mpy
  • neopixel.mpy

Once we have all the files we need, a directory listing will look similar to above as far as files and directories.

Upload Code

Click on the Download Project Zip link below to grab the main code directly from GitHub. Rename the file to code.py and drop it onto the main (root) directory of the CIRCUITPY drive that appeared in your computer file explorer/finder when the board was plugged in via a known, good USB cable The code will run properly when all of the files have been uploaded including libraries.

Use any text editor or favorite IDE to modify the code. We suggest using Mu.

import ssl
import board
import neopixel
import adafruit_requests
import socketpool
import wifi
from adafruit_io.adafruit_io import IO_HTTP
from adafruit_pixel_framebuf import PixelFramebuffer
# adafruit_circuitpython_adafruitio usage with native wifi networking

# Neopixel matrix configuration
PIXEL_PIN = board.IO6
PIXEL_WIDTH = 12
PIXEL_HEIGHT = 12

# secrets.py has SSID/password and adafruit.io
try:
    from secrets import secrets
except ImportError:
    print("WiFi secrets are kept in secrets.py, please add them there!")
    raise
AIO_USERNAME = secrets["aio_username"]
AIO_KEY = secrets["aio_key"]

# LED matrix creation
PIXELS = neopixel.NeoPixel(
    PIXEL_PIN, PIXEL_WIDTH * PIXEL_HEIGHT, brightness=0.5, auto_write=False,
)

PIXEL_FRAMEBUF = PixelFramebuffer(
    PIXELS,
    PIXEL_WIDTH,
    PIXEL_HEIGHT,
    alternating=True,
    rotation=1,
    reverse_x=True
    )

# Adafruit.io feeds setup
QUOTE_FEED = "sign-quotes.signtext"
COLOR_FEED = "sign-quotes.signcolor"
CURRENT_TEXT = "Merry Christmas!"
CURRENT_COLOR = 0xFFFFFF

# Helper function to get updated data from Adafruit.io
def update_data():
    global CURRENT_TEXT, CURRENT_COLOR
    print("Updating data from Adafruit IO")
    try:
        quote_feed = IO.get_feed(QUOTE_FEED)
        quotes_data = IO.receive_data(quote_feed["key"])
        CURRENT_TEXT = quotes_data["value"]
        color_feed = IO.get_feed(COLOR_FEED)
        color_data = IO.receive_data(color_feed["key"])
        CURRENT_COLOR = int(color_data["value"][1:], 16)
    # pylint: disable=broad-except
    except Exception as error:
        print(error)


# Connect to WiFi
print("Connecting to %s" % secrets["ssid"])
wifi.radio.connect(secrets["ssid"], secrets["password"])
print("Connected to %s!" % secrets["ssid"])

# Setup Adafruit IO connection
POOL = socketpool.SocketPool(wifi.radio)
REQUESTS = adafruit_requests.Session(POOL, ssl.create_default_context())
# Initialize an Adafruit IO HTTP API object
IO = IO_HTTP(AIO_USERNAME, AIO_KEY, REQUESTS)


while True:
    update_data()
    print("Displaying", CURRENT_TEXT, "in", hex(CURRENT_COLOR))

    for i in range(12 * len(CURRENT_TEXT) + PIXEL_WIDTH):
        PIXEL_FRAMEBUF.fill(0x000000)
        PIXEL_FRAMEBUF.pixel(0, 0, 0x000000)
        PIXEL_FRAMEBUF.text(CURRENT_TEXT, PIXEL_WIDTH - i, 3, CURRENT_COLOR)
        PIXEL_FRAMEBUF.display()

This guide was first published on Dec 15, 2020. It was last updated on Dec 15, 2020.

This page (Code) was last updated on Oct 08, 2021.

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