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60 lines
1.8 KiB
C++
60 lines
1.8 KiB
C++
#pragma once
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#include "esphome/core/component.h"
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#include "esphome/components/sensor/sensor.h"
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namespace esphome::absolute_humidity {
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/// Enum listing all implemented saturation vapor pressure equations.
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enum SaturationVaporPressureEquation {
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BUCK,
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TETENS,
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WOBUS,
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};
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/// This class implements calculation of absolute humidity from temperature and relative humidity.
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class AbsoluteHumidityComponent : public sensor::Sensor, public Component {
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public:
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void set_temperature_sensor(sensor::Sensor *temperature_sensor) { this->temperature_sensor_ = temperature_sensor; }
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void set_humidity_sensor(sensor::Sensor *humidity_sensor) { this->humidity_sensor_ = humidity_sensor; }
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void set_equation(SaturationVaporPressureEquation equation) { this->equation_ = equation; }
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void setup() override;
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void dump_config() override;
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void loop() override;
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protected:
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/** Buck equation for saturation vapor pressure in kPa.
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*
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* @param temperature_c Air temperature in °C.
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*/
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static float es_buck(float temperature_c);
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/** Tetens equation for saturation vapor pressure in kPa.
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*
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* @param temperature_c Air temperature in °C.
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*/
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static float es_tetens(float temperature_c);
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/** Wobus equation for saturation vapor pressure in kPa.
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*
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* @param temperature_c Air temperature in °C.
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*/
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static float es_wobus(float temperature_c);
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/** Calculate vapor density (absolute humidity) in g/m³.
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*
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* @param es Saturation vapor pressure in kPa.
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* @param hr Relative humidity 0 to 1.
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* @param ta Absolute temperature in K.
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*/
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static float vapor_density(float es, float hr, float ta);
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sensor::Sensor *temperature_sensor_{nullptr};
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sensor::Sensor *humidity_sensor_{nullptr};
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float temperature_{NAN};
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float humidity_{NAN};
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SaturationVaporPressureEquation equation_;
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};
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} // namespace esphome::absolute_humidity
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