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Scriptable AQI widget
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| // Variables used by Scriptable. | |
| // These must be at the very top of the file. Do not edit. | |
| // icon-color: deep-green; icon-glyph: tree; | |
| // change to the station id closest to you. station id can be found in the purple air url when you click on a sensor circle | |
| // e.g. https://www.purpleair.com/map?opt=1/i/mAQI/a10/cC0&select=21057 | |
| const purpleAirStationID = 21057 | |
| let items = await loadItems() | |
| let widget = await createWidget(items) | |
| // Check if the script is running in | |
| // a widget. If not, show a preview of | |
| // the widget to easier debug it. | |
| if (!config.runsInWidget) { | |
| await widget.presentMedium() | |
| } | |
| // Tell the system to show the widget. | |
| Script.setWidget(widget) | |
| Script.complete() | |
| async function createWidget(result) { | |
| let w = new ListWidget() | |
| let header = w.addText('Berkeley AQI (10 min avg)') | |
| header.font = Font.boldSystemFont(16) | |
| header.textColor = Color.black() | |
| const val = JSON.parse(result.Stats).v1 | |
| const aqi = aqiFromPM(val) | |
| w.backgroundColor = Color[getBGColor(aqi)]() | |
| let titleTxt = w.addText(aqi.toString()) | |
| titleTxt.font = Font.boldSystemFont(40) | |
| titleTxt.textColor = Color.black() | |
| let date = w.addText(new Date().toLocaleTimeString()) | |
| date.font = Font.boldSystemFont(16) | |
| date.textColor = Color.gray() | |
| return w | |
| } | |
| async function loadItems() { | |
| let url = "https://www.purpleair.com/json?show=" + purpleAirStationID | |
| let req = new Request(url) | |
| let json = await req.loadJSON() | |
| return json.results[0] | |
| } | |
| function getBGColor(aqi) { | |
| if (aqi > 200) { | |
| return 'purple' | |
| } else if (aqi > 150) { | |
| return 'red' | |
| } else if (aqi > 100) { | |
| return 'orange' | |
| } else if (aqi > 50) { | |
| return 'yellow' | |
| } else { | |
| return 'green' | |
| } | |
| } | |
| // from https://docs.google.com/document/d/15ijz94dXJ-YAZLi9iZ_RaBwrZ4KtYeCy08goGBwnbCU/edit | |
| function aqiFromPM(pm) { | |
| if (isNaN(pm)) return "-"; | |
| if (pm == undefined) return "-"; | |
| if (pm < 0) return pm; | |
| if (pm > 1000) return "-"; | |
| /* | |
| Good 0 - 50 | |
| Moderate 51 - 100 | |
| Unhealthy for Sensitive Groups 101 – 150 | |
| Unhealthy 151 – 200 | |
| Very Unhealthy 201 – 300 | |
| Hazardous 301 – 400 | |
| Hazardous 401 – 500 | |
| */ | |
| if (pm > 350.5) { | |
| return calcAQI(pm, 500, 401, 500, 350.5); | |
| } else if (pm > 250.5) { | |
| return calcAQI(pm, 400, 301, 350.4, 250.5); | |
| } else if (pm > 150.5) { | |
| return calcAQI(pm, 300, 201, 250.4, 150.5); | |
| } else if (pm > 55.5) { | |
| return calcAQI(pm, 200, 151, 150.4, 55.5); | |
| } else if (pm > 35.5) { | |
| return calcAQI(pm, 150, 101, 55.4, 35.5); | |
| } else if (pm > 12.1) { | |
| return calcAQI(pm, 100, 51, 35.4, 12.1); | |
| } else if (pm >= 0) { | |
| return calcAQI(pm, 50, 0, 12, 0); | |
| } else { | |
| return undefined; | |
| } | |
| } | |
| function calcAQI(Cp, Ih, Il, BPh, BPl) { | |
| var a = (Ih - Il); | |
| var b = (BPh - BPl); | |
| var c = (Cp - BPl); | |
| return Math.round((a/b) * c + Il); | |
| } |
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how to find the sensor ID for your location