Retrieve AQI (with AQandU conversion) from a PurpleAir sensor via the CLI or as a library to your node script

Most of this code was stolen from https://aqi.wtf

Open the PurpleAir map: https://www.purpleair.com/map?mylocation

and click on the sensor closest to your location.

The URL bar will change to something like:

https://www.purpleair.com/map?opt=1/mAQI/a10/cC0&select=62217#15.69/37.737125/-122.414218

The sensor ID will be the value of the select parameter. In the above URL, the ID is 62217:

https://www.purpleair.com/map?opt=1/mAQI/a10/cC0&select=62217#15.69/37.737125/-122.414218

Install the module globally

npm install -g purpleair

Then call:

purpleair [sensor ID]

which will return the AQI.

Example output:

> purpleair 62217
139

With the AQI class:

> purpleair --class 62217
139 (unhealthy-for-sensitive-groups)

As JSON:

> purpleair --class --json 62217
{
  "aqi": 139,
  "sensorId": 62217,
  "class": "unhealthy-for-sensitive-groups"
}

There are three functions:

• getSensor(sensorId)
• getAQI(sensor)
• getAQIClass(aqi)

Example:

const purpleair = require('purpleair');

const main = async () => {
    try {

        var sensor = await purpleair.getSensor(62217);
        var aqi = await purpleair.getAQI(sensor);

        console.log(aqi);

        var aqiClass = purpleair.getAQIClass(aqi);

        console.log(aqiClass);

    } catch (err) {
        console.error(err);
    }
};

main();

MIT