CircuitPython Countdown for MagTag Demo

code.py

import sys
import time
import board
import wifi
import socketpool
import adafruit_requests
import ssl
import rtc
import displayio
import terminalio
import adafruit_il0373
import adafruit_miniqr
from adafruit_display_text import label
from adafruit_bitmap_font import bitmap_font


# The time of the thing!
EVENT_YEAR = 2021
EVENT_MONTH = 1
EVENT_DAY = 20
EVENT_HOUR = 12
EVENT_MINUTE = 00
# we'll make a python-friendly structure
event_time = time.struct_time((EVENT_YEAR, EVENT_MONTH, EVENT_DAY,
                               EVENT_HOUR, EVENT_MINUTE, 0,  # we don't track seconds
                               -1, -1, False))  # we dont know day of week/year or DST

displayio.release_displays()
display_bus = displayio.FourWire(board.SPI(), command=board.EPD_DC,
                                 chip_select=board.EPD_CS,
                                 reset=board.EPD_RESET, baudrate=1000000)
time.sleep(1)
display = adafruit_il0373.IL0373(
    display_bus,
    width=296,
    height=128,
    rotation=270,
    black_bits_inverted=False,
    color_bits_inverted=False,
    grayscale=True,
    refresh_time=1,
    seconds_per_frame=5
)


def bitmap_QR(matrix):
    # monochome (2 color) palette
    BORDER_PIXELS = 2

    # bitmap the size of the screen, monochrome (2 colors)
    bitmap = displayio.Bitmap(
        matrix.width + 2 * BORDER_PIXELS, matrix.height + 2 * BORDER_PIXELS, 2
    )
    # raster the QR code
    for y in range(matrix.height):  # each scanline in the height
        for x in range(matrix.width):
            if matrix[x, y]:
                bitmap[x + BORDER_PIXELS, y + BORDER_PIXELS] = 1
            else:
                bitmap[x + BORDER_PIXELS, y + BORDER_PIXELS] = 0
    return bitmap

qr = adafruit_miniqr.QRCode(qr_type=3, error_correct=adafruit_miniqr.L)
qr.add_data(b"https://buildbackbetter.com/")
qr.make()

# generate the 1-pixel-per-bit bitmap
qr_bitmap = bitmap_QR(qr.matrix)
# We'll draw with a classic black/white palette
palette = displayio.Palette(2)
palette[0] = 0xFFFFFF
palette[1] = 0x000000
# we'll scale the QR code as big as the display can handle
scale = min(
    display.width // qr_bitmap.width, display.height // qr_bitmap.height
)
# then put it on the right
pos_x = int((display.width / scale) - qr_bitmap.width)
pos_y = int(((display.height / scale) - qr_bitmap.height) / 2)
qr_img = displayio.TileGrid(qr_bitmap, pixel_shader=palette, x=pos_x, y=pos_y)
qr_group =  displayio.Group(scale=scale)
qr_group.append(qr_img)

# bg color
bg_bm = displayio.Bitmap(display.width, display.height, 1)
bg_sprite = displayio.TileGrid(bg_bm, pixel_shader=palette, x = 0, y = 0)

# text label

font = bitmap_font.load_font("Arial-Bold-24.bdf")
text_area = label.Label(font, text="Loading...", max_glyphs=40,
                        anchor_point = (0, 0.5), line_spacing=0.75,
                        x = 10, y = display.height//2, color = 0x0)

splash = displayio.Group()
splash.append(bg_sprite)
splash.append(qr_group)
splash.append(text_area)
display.show(splash)
display.refresh()

wifi.radio.connect("adafruit", "ffffffff")
print("ip", wifi.radio.ipv4_address)

#ipv4 = ipaddress.ip_address("8.8.4.4")
#print(ipv4)
#print("ping", wifi.radio.ping(ipv4))

pool = socketpool.SocketPool(wifi.radio)
requests = adafruit_requests.Session(pool, ssl.create_default_context())

response = requests.get("http://worldtimeapi.org/api/timezone/America/New_York")
#print(response.status_code)
datetime_str = response.json()['datetime']
#print(datetime_str)
datesplit = datetime_str.split("-")
year = int(datesplit[0])
month = int(datesplit[1])
timesplit = datesplit[2].split("T")
mday = int(timesplit[0])
timesplit = timesplit[1].split(":")
hours = int(timesplit[0])
minutes = int(timesplit[1])
seconds = int(float(timesplit[2].split("-")[0]))
rtc.RTC().datetime =  time.struct_time((year, month, mday, hours, minutes, seconds, 0, 0, False))

while True:
    now = time.localtime()
    print("Current time:", now)
    remaining = time.mktime(event_time) - time.mktime(now)
    print("Time remaining (s):", remaining)
    if remaining < 0:
        print("EVENT TIME")
        while True:  # that's all folks
            pass
    secs_remaining = remaining % 60
    remaining //= 60
    mins_remaining = remaining % 60
    remaining //= 60
    hours_remaining = remaining % 24
    remaining //= 24
    days_remaining = remaining
    print("%d days, %d hours, %d minutes and %s seconds" %
          (days_remaining, hours_remaining, mins_remaining, secs_remaining))
    text_area.text = "%d Days\n%d Hours\n%d Mins" % (days_remaining, hours_remaining, mins_remaining)
    display.refresh()
    time.sleep(60)