Class: Tinkerforge::BrickletAirQuality

Inherits:
Object
  • Object
show all
Defined in:
lib/tinderfridge/devices/bricklet_air_quality/bricklet_air_quality.rb

Instance Method Summary collapse

Instance Method Details

#qff(altitude) ⇒ Object

Returns the derived air pressure at sea level.

Air pressure is derived from:

  • air pressure as measured by the Bricklet itself

  • temperature as measured by the Bricklet itself

  • altitude of the Bricklet’s location (meter)

With help from:



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# File 'lib/tinderfridge/devices/bricklet_air_quality/bricklet_air_quality.rb', line 28

def qff(altitude)
# QFE / [1 - Tg * H / (273.15 + Tfe + Tg * H)] ^ (0.034163 / Tg)
  (get_air_pressure / (1 - 0.0065 * altitude / (273.15 + (get_temperature * 0.01) + 0.0065 * altitude)) ** (0.034163 / 0.0065)).round
end

#state ⇒ Object

Returns the device’s state.



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# File 'lib/tinderfridge/devices/bricklet_air_quality/bricklet_air_quality.rb', line 6

def state
  av = get_all_values
  super.merge(
    'iaq_index'          => av[0],
    'iaq_index_accuracy' => av[1],
    'temperature'        => av[2],
    'temperature_offset' => get_temperature_offset,
    'humidity'           => av[3],
    'air_pressure'       => av[4],
  )
end