USAGE

$ aqi --sensor=<id>[,<id>,...] [options]

OPTIONS

--api_url=<URL>  set API url (default https://www.purpleair.com/json?show=)
--average        display averages per sensor rather than every value
-g               provide gestalt guess of net AQI
-i               round displayed numbers to their nearest integer values
--no_errors      squelch error notifications to stderr
--no_warnings    squelch warning notifications to stderr
--now            report current AQI instead of ten-minute average
--prune-threshold=<fraction>
                 set threshold for pruning additional outliers with -g
                 (default 0.1 (10%))
--raw            report raw concentration numbers, not EPA PM2.5 AQI
--sensor=<IDS>   numeric IDs of sensors to query (default 25407)
--stash-path=<DIRECTORY>
                 save fetched JSON blobs to given directory",

See documentation for Weather::PurpleAir::API for details on these options.

OUTPUT

Report is one line per sensor, each line consisting of tab-separated sensor name and PM2.5 values (or their average with --average).

ABOUT GUESS

The gestalt guess (-g option) is reported with sensor name "GUESSING".

The first value provided is the average of sensor readings. It will discount outliers if enough sensor readings were provided.

The second value is the standard deviation of the guess. Higher implies lower confidence (more skew between the average and the actual values).

The guess output is not influenced by the --average option.

ABOUT RELIABILITY

The sensor readings are not always reliable. A car starting or a person smoking near the sensor can produce a false high reading. Right now the workaround is to specify multiple sensors and use the -g option. Future releases will provide alternative remedies.

EXAMPLES

$ aqi --sensor=22961,25407,26363,38887 -g

City Of Santa Rosa Laguna Treatment Plant       97.4506528040242        97.2762981784708
Gravenstein School      105.746724675409        104.535337039851
Geek Orchard    110.119707305832        105.034255297563
Litchfield      101.627723408978        104.651888137621
GUESSING        104.140418315465        4.14926751407653

$ bin/aqi --sensor=22961,38887 -g -i

City Of Santa Rosa Laguna Treatment Plant       109     108
Litchfield      109     121
GUESSING        109     6

$ aqi --sensor=22961,38887 --average

City Of Santa Rosa Laguna Treatment Plant       98.5790284968979
Litchfield      103.551331508591