/*
  Simple "Hello World" for ILI9341 LCD

  https://wokwi.com/arduino/projects/308024602434470466
*/

#include "SPI.h"
#include "Adafruit_GFX.h"
#include "Adafruit_ILI9341.h"

#define TFT_DC 9
#define TFT_CS 10
#define PIR_sensor 7
#define NTC_sensor A0

Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC);

void setup() {

  pinMode(PIR_sensor, INPUT);
  pinMode(NTC_sensor, INPUT);


  tft.begin();

  tft.setCursor(26, 80);
  tft.setTextColor(ILI9341_RED);
  tft.setTextSize(3);
  tft.println("Hello, TFT!");

  // Meme reference: https://english.stackexchange.com/questions/20356/origin-of-i-can-haz
}

void loop() {

  const float BETA = 3950; // should match the Beta Coefficient of the thermistor
  int analogValue = analogRead(A0);
  float celsius = 1 / (log(1 / (1023. / analogValue - 1)) / BETA + 1.0 / 298.15) - 273.15;

  int pir_state = digitalRead(PIR_sensor);
  Serial.println(pir_state);

  if (pir_state == HIGH){
    tft.setCursor(26, 120);
    tft.setTextSize(3);
    tft.println("Temperatura");
    tft.setCursor(26, 160);
    tft.setTextSize(2);
    tft.println(celsius);
  }
  else{
    tft.fillScreen(ILI9341_BLACK); // Clear the screen with black color
      tft.setCursor(26, 80);
    tft.setTextColor(ILI9341_RED);
    tft.setTextSize(3);
    tft.println("Hello, TFT!");

  }

}