analog.cpp

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// Copyright (c) 2023 Samuli Nyman
// SPDX-License-Identifier: MIT
 
#include "analog.h"
 
 
float calculateVoltageDegree3(int input) {
  float a = -1.907217e-11;
  float b = 8.368612e-08;
  float c = 7.081732e-04;
  float d = 1.572375e-01;
 
  return a * pow(input, 3) + b * pow(input, 2) + c * input + d;
}
 
float adcToVoltage(int value)
{
    return calculateVoltageDegree3(value);
}
 
float analogReadVoltage(int pin)
{
    int value = analogRead(pin);
    return adcToVoltage(value);
}