scale/src/scale.cpp

#include "scale.h"

void Scale::init() {
    scaled_weight = EEPROM.readDouble(e_scale);
    int gain = EEPROM.readInt(e_gain);

    hx711.begin(out, clck, gain);
    offset = init_reading();
}

long Scale::init_reading() {
    hx711.read_average(20);
    return hx711.read_average(NUMBER_OF_READINGS);
}

void Scale::read() {
    raw = hx711.read();
    actual_gram = (raw - offset) / scaled_weight;

    if (abs(actual_gram - average_gram) > EPSILON) {
        sum = 0;
        count = 0;
        sum_raw = 0;
        average_raw = raw;
        average_gram = actual_gram;
    }
    else {
        sum += actual_gram;
        sum_raw += raw;
        count++;
        average_gram = sum / count;
        average_raw = sum_raw / count;
    }
}

void Scale::tare() {
    offset = average_raw;
}

void Scale::calibrate() {
    scaled_weight = (raw - offset) / get_calibration_weight();
    EEPROM.updateDouble(e_scale, scaled_weight);
}