114 lines
3.8 KiB
Python
114 lines
3.8 KiB
Python
"""
|
|
PyPortal UV Index display
|
|
|
|
Adafruit invests time and resources providing this open source code.
|
|
Please support Adafruit and open source hardware by purchasing
|
|
products from Adafruit!
|
|
|
|
Written by Dave Astels for Adafruit Industries
|
|
Copyright (c) 2019 Adafruit Industries
|
|
Licensed under the MIT license.
|
|
|
|
All text above must be included in any redistribution.
|
|
"""
|
|
|
|
import time
|
|
import board
|
|
import json
|
|
import displayio
|
|
from adafruit_pyportal import PyPortal
|
|
from adafruit_display_shapes.rect import Rect
|
|
from adafruit_display_text.Label import Label
|
|
from adafruit_bitmap_font import bitmap_font
|
|
|
|
try:
|
|
from secrets import secrets
|
|
except ImportError:
|
|
print("""WiFi settings are kept in secrets.py, please add them there!
|
|
the secrets dictionary must contain 'ssid' and 'password' at a minimum""")
|
|
raise
|
|
|
|
MAX_BAR_HEIGHT = 160
|
|
MARGIN = 10
|
|
SPACE_BETWEEN_BARS = 1
|
|
|
|
COLORS = [0x00FF00, 0x83C602, 0xa2CF02,
|
|
0xF7DE03, 0xF6B502, 0xF78802,
|
|
0xF65201, 0xEA2709,
|
|
0xDA0115, 0xFC019E, 0xB548FF,
|
|
0x988FFE, 0x7EA7FE, 0x66BFFD, 0x4BD9FF]
|
|
|
|
cwd = ("/"+__file__).rsplit('/', 1)[0]
|
|
|
|
CAPTION_FONT_FILE = cwd+'/fonts/Helvetica-Bold-16.bdf'
|
|
TEXT_FONT_FILE = cwd+'/fonts/Helvetica-Bold-16.bdf'
|
|
HOUR_FONT_FILE = cwd+'/fonts/Arial-Bold-12.bdf'
|
|
|
|
def halt_and_catch_fire(message, *args):
|
|
"""Log a critical error and stall the system."""
|
|
print(message % args)
|
|
while True:
|
|
pass
|
|
|
|
url = 'https://enviro.epa.gov/enviro/efservice/getEnvirofactsUVHOURLY/ZIP/{0}/JSON'.format(secrets['zip'])
|
|
|
|
def extract_hour(date_time):
|
|
split_date_time = date_time.split()
|
|
hour = split_date_time[1]
|
|
suffix = split_date_time[2]
|
|
if hour[0] == '0':
|
|
hour = hour[1]
|
|
return '\n'.join([hour, suffix])
|
|
|
|
def extract_date(date_time):
|
|
return ' '.join(date_time.split('/')[0:2])
|
|
|
|
# Initialize the pyportal object and let us know what data to fetch and where
|
|
# to display it
|
|
pyportal = PyPortal(url=url,
|
|
status_neopixel=board.NEOPIXEL,
|
|
default_bg=0xFFFFFF,
|
|
text_font=TEXT_FONT_FILE,
|
|
text_position=(20, 60),
|
|
text_color=0xFFFFFF,
|
|
text_wrap=35,
|
|
caption_font=CAPTION_FONT_FILE)
|
|
|
|
canvas = displayio.Group(max_size=36)
|
|
pyportal.splash.append(canvas)
|
|
hour_font = bitmap_font.load_font(HOUR_FONT_FILE)
|
|
|
|
while True:
|
|
raw_data = json.loads(pyportal.fetch())
|
|
data = [{'hour': extract_hour(d['DATE_TIME']), 'value': int(d['UV_VALUE'])}
|
|
for d in raw_data
|
|
if d['UV_VALUE'] > 0]
|
|
the_day = raw_data[0]['DATE_TIME']
|
|
pyportal.set_caption('UV Index for {0}'.format(extract_date(the_day)),
|
|
(80, 20),
|
|
0x000000)
|
|
number_of_readings = len(data)
|
|
whitespace = (number_of_readings - 1) * SPACE_BETWEEN_BARS + 2 * MARGIN
|
|
bar_width = (320 - whitespace) // number_of_readings
|
|
max_reading = max([d['value'] for d in data])
|
|
|
|
while len(canvas) > 0:
|
|
canvas.pop()
|
|
|
|
for i, reading in enumerate(data):
|
|
bar_height = (MAX_BAR_HEIGHT * reading['value']) // max_reading
|
|
x = int(MARGIN + i * (bar_width + SPACE_BETWEEN_BARS))
|
|
canvas.append(Rect(x, 200 - bar_height,
|
|
bar_width, bar_height,
|
|
fill=COLORS[reading['value']]))
|
|
canvas.append(Label(hour_font,
|
|
x=x+3, y=220,
|
|
text=reading['hour'],
|
|
color=0x000000,
|
|
line_spacing=0.6))
|
|
canvas.append(Label(hour_font,
|
|
x=x+(bar_width//2)-4, y=208-bar_height,
|
|
text=str(reading['value']),
|
|
color=0x000000))
|
|
|
|
time.sleep(3600) #refresh hourly
|