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andersk/purpleair.10m.py

Created September 1, 2020 20:50
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  1. andersk created this gist Sep 1, 2020.
    60 changes: 60 additions & 0 deletions purpleair.10m.py
    View file
    Original file line number Diff line number Diff line change
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    #!/usr/bin/env python
    import json
    from datetime import datetime

    import requests

    SENSOR_ID = 4372

    data = requests.get("https://www.purpleair.com/json", {"show": SENSOR_ID}).json()
    result = data["results"][0]
    stats = json.loads(result["Stats"])
    conc = float(stats["v1"])
    conc = int(conc * 10) / 10

    # EPA 454/B-18-007 Table 2
    green = (0, 228, 0)
    yellow = (255, 255, 0)
    orange = (255, 126, 0)
    red = (255, 0, 0)
    purple = (143, 63, 151)
    maroon = (126, 0, 35)

    # EPA 454/B-18-007 Table 1, 5
    for (aqi_low, aqi_high, conc_low, conc_high, color_low, color_high) in [
    (0, 50, 0.0, 12.0, green, yellow),
    (51, 100, 12.1, 35.4, yellow, orange),
    (101, 150, 35.5, 55.4, orange, red),
    (151, 200, 55.5, 150.4, red, purple),
    (201, 300, 150.5, 250.4, purple, maroon),
    (301, 400, 250.5, 350.4, maroon, maroon),
    (401, 500, 350.5, 500.4, maroon, maroon),
    (501, 999, 500.5, 99999.9, maroon, maroon),
    ]:
    if conc < conc_high + 0.05:
    break

    t = (conc - conc_low) / (conc_high - conc_low)
    aqi = round(aqi_low + (aqi_high - aqi_low) * t)
    color = "#" + "".join(
    format(round(low + (high - low) * t), "02x")
    for low, high in zip(color_low, color_high)
    )

    print(f'AQI <span color="{color}">{aqi}</span>')
    print("---")
    print(result["Label"])
    if "humidity" in result:
    print(f"Humidity {result['humidity']}%")
    if "temp_f" in result:
    print(f"Temperature {result['temp_f']}°F")
    if "pressure" in result:
    print(f"Pressure {result['pressure']} mbar")
    print(
    "Updated",
    datetime.fromtimestamp(stats["lastModified"] / 1000).isoformat(timespec="seconds"),
    )
    print("Retrieved", datetime.now().isoformat(timespec="seconds"))
    print(
    f"View on PurpleAir | href='https://www.purpleair.com/map?select={SENSOR_ID}#14/{result['Lat']}/{result['Lon']}'",
    )