CircuitPython AQI Meter

code.py

import os
import ssl
import time
import wifi
import board
from neopixel import NeoPixel
from socketpool import SocketPool
from adafruit_requests import Session

print(f'IP address: {wifi.radio.ipv4_address}')

num_pixels = 8
pixels = NeoPixel(board.GP0, num_pixels, brightness=0.05, auto_write=False)

# Make sure your settings.toml file has ZIP and WEATHER_KEY defined.
# Get an API key for airnow.gov here: https://docs.airnowapi.org/account/request/
url = f'https://www.airnowapi.org/aq/observation/zipCode/current/?format=application/json&zipCode={os.getenv("ZIP")}&distance=5&API_KEY={os.getenv("WEATHER_KEY")}'
pool = SocketPool(wifi.radio)
requests = Session(pool, ssl.create_default_context())

def show_aqi():
  """
  Get Air Quality Index information from airnow.gov and set the neopixel stick according to the PM2.5 value.
  """
  aq_data = requests.get(url).json()
  pm25 = next(item for item in aq_data if item['ParameterName'] == 'PM2.5')
  aqi = pm25['AQI']
  print(f'Current AQI: {aqi}')

  if (aqi >= 0):
    pixels[0] = (0, 255, 0)
  if (aqi >= 50):
    pixels[1] = (150, 150, 0)
  if (aqi >= 100):
    pixels[2] = (215, 255, 5)
  if (aqi >= 150):
    pixels[3] = (255, 0, 0)
  if (aqi >= 200):
    pixels[4] = (180, 0, 255)
  if (aqi >= 250):
    pixels[5] = (180, 0, 255)
  if (aqi >= 300):
    pixels[6] = (0, 0, 255)
    pixels[7] = (0, 0, 255)

  pixels.show()

# Initialize on boot
show_aqi()
now = time.mktime(time.localtime())
update_interval = 60 * 60 # 1h since apparently this system doesn't get frequent updates.
next_update = now + update_interval

while True:
  current_time = time.mktime(time.localtime())
  if current_time >= next_update:
    print(f'Updating AQI data...')
    show_aqi()
    next_update = current_time + update_interval