/**
  Basic NTC Thermistor demo
  https://wokwi.com/arduino/projects/299330254810382858

  Assumes a 10K@25℃ NTC thermistor connected in series with a 10K resistor.

  Copyright (C) 2021, Uri Shaked
*/
#include <TFT.h>
#include <SPI.h>


#define CS 10
#define DC 9
#define RESET 8


const float BETA = 3950; // should match the Beta Coefficient of the thermistor

TFT screen = TFT(CS, DC, RESET);
float currentAverage;
int counter;
int tempSum;
// char array to print time
char printoutC[8];
char printoutA[8];

void setup() {
  currentAverage = 0;
  counter = 0;
  tempSum = 0;

  screen.begin();

  screen.setTextSize(1.5);
  screen.background(0, 0, 0);  // clear the screen

  screen.stroke(255, 255, 255);

  // static text

  screen.text("Current Temperature", 0, 0);

  screen.text("C", 155, 0);


  screen.text("Average Temperature", 0, 40);

  screen.text("C", 155, 40);



}

void loop() {
  int analogValue = analogRead(A0);
  float celsius = 1 / (log(1 / (1023. / analogValue - 1)) / BETA + 1.0 / 298.15) - 273.15;
  counter = counter + 1;
  tempSum = tempSum + celsius; 
  
  if ((counter % 10) == 0) {
    currentAverage = tempSum / counter;
  }

  String average = String(currentAverage);
  average.toCharArray(printoutA, 8);

  String current = String(celsius);
  current.toCharArray(printoutC, 8);
  
  screen.stroke(255, 255, 255);

  screen.text(printoutC, 125, 0);
  screen.text(printoutA, 125, 40);
  
  delay(1000);

  screen.stroke(0, 0, 0);

  screen.text(printoutC, 125, 0);
  screen.text(printoutA, 125, 40);
}