arduino-uno-thermometer/application.cpp

#include "application.h"

#include <WString.h>

void Application::init() noexcept {
  AbstractNode::init();
  lcd_.begin(16, 2);
  lcd_.clear();
}

void Application::update(unsigned long const deltaMillis) noexcept {
  AbstractNode::update(deltaMillis);

  updateDisplay_ += deltaMillis;

  auto const& hs = children_.getHeatSensor();
  if (hs.hasValueChanged() && updateDisplay_ > 250ul) {
    float const voltage = (hs.getValue() / 1024.0f) * 5.0f;
    float const temperature = (voltage - 0.5f) * 100.0f;
    lcd_.home();
    lcd_.write("Temperature: ");
    lcd_.setCursor(0, 1);
    lcd_.write(String{temperature, 2}.c_str());
    lcd_.write(" DC       ");
    updateDisplay_ = 0ul;
  }
}