#include "Thermometer.h"
#include "Config.h"

using namespace nsThermometer;

const float INVALID_TEMPERATURE = -300.0;

const uint8_t CONFIG_ALPHA = 0;


Thermometer::Thermometer() {
	
} 


void Thermometer::begin(bool initializeConfig, int eepromAddr) {
	m_eepromAddr = eepromAddr;
	
	if (initializeConfig) {
	  // set default values
    Config::setFloat(m_eepromAddr + CONFIG_ALPHA, 1.0);
	}
	
	m_lastSmoothedTemperature = INVALID_TEMPERATURE;
	alpha = Config::getFloat(m_eepromAddr + CONFIG_ALPHA);
}


void Thermometer::exec(float r) {
	temperatureRaw = (r / PT1000_R0 - 1) / PT1000_Coeff;

	if (m_lastSmoothedTemperature == INVALID_TEMPERATURE) {
		temperature = temperatureRaw;
	} else {
		temperature = alpha * temperatureRaw + (1 - alpha) * m_lastSmoothedTemperature;
	}
	m_lastSmoothedTemperature = temperature;
}