/*
  NTC Temperature Sensor using Franzininho, NTC and SSD1306
  by Anderson Costa with ❤ for the Wokwi community
  Modify by Leko 7-seg with 74hc595 
  Visit https://wokwi.com to learn about the Wokwi Simulator
  Visit https://franzininho.com.br to learn about the Franzininho
*/
#include <ShiftDisplay.h>
const int DISPLAY_SIZE = 5; // number of digits on display
#define latchPin PB0
#define clockPin PB1
#define dataPin  PB2
ShiftDisplay display(latchPin, clockPin, dataPin, COMMON_ANODE, 3);

#define NTC_PIN A3
const float BETA = 3950.0; // Deve corresponder ao coeficiente beta do termistor

void setup() {

}

void loop() {
  static unsigned long startTime = 0;
  unsigned long currentTime;

  // Retorna o número de milissegundos passados
  // desde que começou a executar o programa atual
  currentTime = millis();

  // Verifica se passou 1 segundo
  if ((currentTime - startTime) >= 1000) {
    // Reseta o temporizador
    startTime = currentTime;
    // Atualiza o display
    updateDisplay();
  }
}

void updateDisplay()
{
  // Atualiza a temperatura
  float temperature = getTemperature();
  //display.set(temperature, 1); // float with one decimal place
  display.show(temperature, 1000, 1, ALIGN_CENTER);
}


float getTemperature()
{
  int analogValue = analogRead(NTC_PIN);
  //float celsius = 1 / (log(1 / ((1023.0 / analogValue) - 1)) / BETA + 0.003354) - 273.15;
  float celsius = BETA / (13.2483-log(1023.0 / analogValue -1)) - 273.15;
  return celsius;
}