Configuration constants and Look-Up-Table values which are supposed to be the same for all sensors. More...

#include <sensor_kty81_1xx.hpp>

Public Attributes
adc_atten_t	adc_ch_attenuation = ADC_ATTEN_DB_6
	Suggested ADC input voltage Range for ESP32 using ADC_ATTEN_DB_6 is 150 ~ 1750 millivolts according to the SDK documentation for function adc1_config_channel_atten(). With reduced accuracy, FSR is approx. 2.2V.

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

int32_t	v_in_fsr_upper_lin = 1428

int32_t	v_in_fsr_lower_lut = 596

int32_t	v_in_fsr_upper_lut = 1646

size_t	lut_size = 32
	Look-Up-Table temperatures for 31 equidistant voltage steps. Table only valid for linearised circuit using 2.2 kOhms series resistor where ADC input voltage steps correspond to the following temperature values in °C. More...

std::array< float, 32 >	lut_temp_kty81_121

std::array< float, 32 >	lut_temp_kty81_110_120

Detailed Description

Configuration constants and Look-Up-Table values which are supposed to be the same for all sensors.

This is instantiated as a static constexpr shared by all sensor instances.

Member Data Documentation

◆ lut_size

size_t KTY81_1xxCommonConfig::lut_size = 32

Look-Up-Table temperatures for 31 equidistant voltage steps. Table only valid for linearised circuit using 2.2 kOhms series resistor where ADC input voltage steps correspond to the following temperature values in °C.

For LUT values, see ../util/kty81_1xx_sensor_generate_lut/kty81_lut.py

◆ lut_temp_kty81_110_120

std::array<float, 32> KTY81_1xxCommonConfig::lut_temp_kty81_110_120

Initial value:

{
        -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}

◆ lut_temp_kty81_121

std::array<float, 32> KTY81_1xxCommonConfig::lut_temp_kty81_121

Initial value:

{
    
        -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}

◆ v_in_fsr_lower_lin

int32_t KTY81_1xxCommonConfig::v_in_fsr_lower_lin = 886

Voltages defining full-scale-range in mV

◆ v_in_fsr_lower_lut

int32_t KTY81_1xxCommonConfig::v_in_fsr_lower_lut = 596