sensor_kty81_1xx.hpp

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#ifndef SENSOR_KTY81_1XX_HPP__
#define SENSOR_KTY81_1XX_HPP__
 
#include <array>
 
#include "esp32_adc_channel.hpp"
#include "app_config.hpp"
 
struct KTY81_1xxCommonConfig
{
    // Objects are constexpr, so members can be used as template parameters etc.
    constexpr KTY81_1xxCommonConfig(){};
 
    adc_atten_t adc_ch_attenuation = ADC_ATTEN_DB_6;
    size_t averaged_samples = 32;
    size_t moving_average_filter_len = 32;
    float temp_fsr_lower_lin = 0.0f;
    float temp_fsr_upper_lin = 100.0f;
    int32_t v_in_fsr_lower_lin = 886; // Corresponds to 0°C
    int32_t v_in_fsr_upper_lin = 1428; // Corresponds to 100°C
 
 
    int32_t v_in_fsr_lower_lut = 596; // Corresponds to -55°C
    int32_t v_in_fsr_upper_lut = 1646; // Corresponds to 150°C
    size_t lut_size = 32;
    std::array<float, 32> lut_temp_kty81_121 {
    // For KTY81-121:
        -55.0       , -48.22273805, -41.51141124, -34.84623091,
        -28.34434926, -22.05459193, -15.78849403,  -9.53746745,
         -3.3772341 ,   2.7675195 ,   8.9372679 ,  15.0916243 ,
         21.14820431,  27.2082161 ,  33.34543424,  39.41134763,
         45.57173941,  51.73398583,  57.85244115,  64.10680179,
         70.45422093,  76.763773  ,  83.14712256,  89.64071316,
         96.17984636, 102.82297981, 109.58309561, 116.4296579 ,
        123.60532846, 131.27866698, 139.78106609, 150.0};
    // For KTY81-110 and KTY81-120:
    std::array<float, 32> lut_temp_kty81_110_120 {
        -55.0       , -48.16279303, -41.39749472, -34.8911357 ,
        -28.54294667, -22.192432  , -15.83544756,  -9.56004681,
         -3.43833483,   2.66313257,   8.80135444,  14.90432723,
         20.97767882,  27.03976174,  33.13792626,  39.28966437,
         45.38382931,  51.48407173,  57.67841773,  63.97159787,
         70.30279723,  76.61562129,  83.00362829,  89.50586837,
         96.07234208, 102.68301035, 109.39886725, 116.34253305,
        123.5137051 , 131.2558412 , 139.76912438, 150.0};
};
 
 
class SensorKTY81_1xx
{
public:
    static constexpr auto _common_conf = KTY81_1xxCommonConfig{};
    ESP32ADCChannelFiltered<_common_conf.moving_average_filter_len> adc_ch;
 
    SensorKTY81_1xx(adc1_channel_t channel,
                    EquidistantPWLUInt16<_common_conf.lut_size> *interpolator);
 
    void update_filter();
 
    float get_temp_pwl();
 
    float get_temp_lin();
 
protected:
    EquidistantPWLUInt16<_common_conf.lut_size> *_interpolator;
};
 
 
class SensorKTY81_121 : public SensorKTY81_1xx
{
public:
    SensorKTY81_121(adc1_channel_t channel)
        : SensorKTY81_1xx{channel,
                          new EquidistantPWLUInt16<_common_conf.lut_size>{
                              _common_conf.lut_temp_kty81_121}
                          }
    {}
    ~SensorKTY81_121() {
        delete _interpolator;
    }
};
 
class SensorKTY81_110_120 : public SensorKTY81_1xx
{
public:
    SensorKTY81_110_120(adc1_channel_t channel)
        : SensorKTY81_1xx{channel,
                          new EquidistantPWLUInt16<_common_conf.lut_size>{
                              _common_conf.lut_temp_kty81_110_120}
                          }
    {}
    ~SensorKTY81_110_120() {
        delete _interpolator;
    }
};
 
#endif