swimtracker-firmware/firmware/lib/scale/Scale.h

#include "HX711.h"
#include "SwimTrackerConfig.h"
#include <cstdint>

template <int DIVIDER = 128>
class Scale
{
public:
    bool measure(uint16_t &measurementOut)
    {
        //if (hx711_.is_ready())
        //{
            long value = hx711_.read_average(CONFIG_MEASUREMENT_AVG_COUNT) - offset_;
            if (value < 0)
                measurementOut = (int16_t)(-value / DIVIDER);
            else
                measurementOut = 0;
            return true;
        //}
        //else {
        //    long value = hx711_.read_average(CONFIG_MEASUREMENT_AVG_COUNT) - offset_;
//
        //    Serial.printf("Measurement failed %ld\n", value);
        //    return false;
        //}
    }

    void begin(uint32_t pinDOUT, uint32_t pinSCK)
    {
        hx711_.begin(pinDOUT, pinSCK);
    };

    void tare(uint32_t numMeasurementsToAverage = 50)
    {
        hx711_.read_average(3);
        offset_ = hx711_.read_average(numMeasurementsToAverage);
        Serial.printf("Tare offset %ld\n", offset_);
    }
    
    const long &offset() const { return offset_; }

private:
    HX711 hx711_;
    long offset_ = 0;
};