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
            return false;
    }

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

    void tare(uint32_t numMeasurementsToAverage = 50)
    {
        offset_ = hx711_.read_average(numMeasurementsToAverage);
    }
    
    long &offset() const { return offset_; }

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