air-stats.rb

#!/usr/bin/env ruby

require 'json'
require 'logger'
log = Logger.new(STDOUT)

TEST_MODE = ARGV[0] == "--test"

fields = %w{ current_humidity current_temp_f aqi pressure }

%w{inside outside}.each do |sensor|

  url = "#{sensor}-air/json"
  json = `curl --silent #{url}`

  data = JSON.parse(json)

  # outside device has two sensors.
  if data["pm2.5_aqi_b"].nil?
    data["pm2.5_aqi_b"] = data["pm2.5_aqi"]
  end

  data["aqi"] = (data["pm2.5_aqi"] + data["pm2.5_aqi_b"]) / 2

  # convert millibars to inches.
  data["pressure"] = (data["pressure"] / 33.864).round(2)

  fields.each do |field|
    msg = %Q{snugglehaus.air.#{sensor}.#{field}:#{data[field]}|g}
    log.info "metric msg: #{msg}"

    if !TEST_MODE
      `echo "#{msg}" | nc -w 1 -u 127.0.0.1 8125`
    end
  end
end