//https://www.mischianti.org/2021/07/14/ssd1306-oled-display-draw-images-splash-and-animations-2/  LOGO CONVERTER

 // state funkció  és meghivás switch-able
 
#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels

// Declaration for an SSD1306 display connected to I2C (SDA, SCL pins)
// The pins for I2C are defined by the Wire-library. 
// On an arduino UNo or NANO:       A4(SDA), A5(SCL)
// On an arduino MEGA 2560:         20(SDA), 21(SCL)
// On an arduino LEONARDO:           2(SDA),  3(SCL), ...
#define OLED_RESET     -1 // Reset pin # (or -1 if sharing Arduino reset pin)
#define SCREEN_ADDRESS 0x3C ///< See datasheet for Address; 0x3D for 128x64, 0x3C for 128x32
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

#define NUMFLAKES     10 // Number of snowflakes in the animation example

#define LOGO_HEIGHT   16
#define LOGO_WIDTH    16

static const unsigned char PROGMEM logo_bmp[] =
{ 0b00000000, 0b11000000,
  0b00000001, 0b11000000,
  0b00000001, 0b11000000,
  0b00000011, 0b11100000,
  0b11110011, 0b11100000,
  0b11111110, 0b11111000,
  0b01111110, 0b11111111,
  0b00110011, 0b10011111,
  0b00011111, 0b11111100,
  0b00001101, 0b01110000,
  0b00011011, 0b10100000,
  0b00111111, 0b11100000,
  0b00111111, 0b11110000,
  0b01111100, 0b11110000,
  0b01110000, 0b01110000,
  0b00000000, 0b00110000 };

const uint8_t PROGMEM batman[] = 
{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x03, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x00, 0x3f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x01, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 0x1f, 0xff, 0xff, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xff, 0xfb, 0xff, 0xc1, 0x80, 0x00, 0x0f, 0xff, 0xff, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 0xff, 0x81, 0xff, 0x00, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x7f, 0x81, 0xff, 0xe0, 0x01, 0xff, 0xff, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xff, 0x80, 0x1f, 0x01, 0xff, 0xf8, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x0c, 0x03, 0xff, 0xfe, 0x00, 0x7f, 0xff, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xfe, 0x00, 0x00, 0x03, 0xff, 0xff, 0x00, 0x3f, 0xff, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xfc, 0x00, 0x00, 0x03, 0xff, 0xff, 0xc0, 0x3f, 0xff, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xfc, 0x06, 0x00, 0x07, 0xff, 0xff, 0xe0, 0x1f, 0xff, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xf8, 0x0f, 0x00, 0x1f, 0xff, 0xff, 0xf0, 0x0f, 0xff, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xfc, 0x0f, 0x80, 0x7f, 0xff, 0xff, 0xf8, 0x07, 0xff, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xfc, 0x07, 0xe3, 0xff, 0xff, 0xff, 0xf8, 0x07, 0xff, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xfe, 0x03, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x03, 0xff, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xff, 0x03, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x03, 0xff, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xff, 0x01, 0xff, 0xff, 0xff, 0xff, 0xff, 0x01, 0xff, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xff, 0x81, 0xff, 0xff, 0xff, 0xff, 0xff, 0x01, 0xff, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0xff, 0xff, 0x3f, 0xff, 0xff, 0x80, 0xff, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xff, 0xc1, 0xff, 0xf0, 0x03, 0xff, 0xff, 0x80, 0xff, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xff, 0x81, 0xff, 0xc0, 0x01, 0xff, 0xff, 0x80, 0xff, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xff, 0x81, 0xff, 0x80, 0x00, 0x7f, 0xff, 0xc0, 0x7f, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xff, 0x03, 0xff, 0x00, 0x00, 0x3f, 0xff, 0x00, 0x7f, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xfc, 0x03, 0xfe, 0x00, 0x00, 0x07, 0xc0, 0x00, 0x7f, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0x80, 0x07, 0xfc, 0x03, 0xf0, 0x00, 0x00, 0x00, 0x7f, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xfe, 0x00, 0x07, 0xfc, 0x0f, 0xf8, 0x00, 0x00, 0x00, 0x7f, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xfe, 0x00, 0x07, 0xf8, 0x1f, 0xfc, 0x00, 0x00, 0x00, 0x7f, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xfe, 0x00, 0x0f, 0xf8, 0x1f, 0xfe, 0x00, 0x00, 0x00, 0x3f, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xfe, 0x00, 0x3f, 0xf0, 0x3f, 0xfe, 0x00, 0x00, 0x00, 0x3f, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xfe, 0x07, 0xff, 0xf0, 0x3f, 0xff, 0x00, 0x03, 0xe0, 0x3f, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xfe, 0x07, 0xff, 0xf0, 0x3f, 0xff, 0x00, 0x3f, 0xe0, 0x3f, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xfe, 0x07, 0xff, 0xf0, 0x3f, 0xff, 0x00, 0xff, 0xe0, 0x3f, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xfe, 0x03, 0xff, 0xf0, 0x3f, 0xfe, 0x03, 0xff, 0xe0, 0x3f, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xfe, 0x00, 0x3f, 0xf8, 0x3f, 0xfe, 0x07, 0xff, 0xe0, 0x7f, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xfe, 0x00, 0x0f, 0xf8, 0x1f, 0xfe, 0x07, 0xff, 0xe0, 0x7f, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xfe, 0x00, 0x0f, 0xf8, 0x0f, 0xfc, 0x0f, 0xff, 0xe0, 0x7f, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0x00, 0x07, 0xfc, 0x07, 0xf8, 0x0f, 0xff, 0xe0, 0x7f, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xe0, 0x07, 0xfc, 0x03, 0xe0, 0x1f, 0xff, 0xc0, 0x7f, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xff, 0x03, 0xfe, 0x01, 0xe0, 0x3f, 0xff, 0xc0, 0x7f, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xff, 0x03, 0xff, 0x01, 0xc0, 0x7f, 0xff, 0xc0, 0x7f, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xff, 0x83, 0xff, 0x81, 0xe0, 0x7f, 0xff, 0x80, 0xff, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xff, 0x81, 0xff, 0x83, 0xe0, 0x7f, 0xff, 0x80, 0xff, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xff, 0x81, 0xff, 0x03, 0xe0, 0x7f, 0xff, 0x81, 0xff, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xff, 0x81, 0xff, 0x03, 0xf0, 0x3f, 0xff, 0x01, 0xff, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xff, 0x81, 0xfe, 0x07, 0xf0, 0x3f, 0xfe, 0x01, 0xff, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xff, 0x01, 0xfe, 0x07, 0xf8, 0x1f, 0xfe, 0x03, 0xff, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xfe, 0x03, 0xfe, 0x0f, 0xf8, 0x1f, 0xfc, 0x03, 0xff, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xfe, 0x07, 0xfc, 0x0f, 0xfc, 0x0f, 0xf8, 0x07, 0xff, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xfc, 0x07, 0xe4, 0x0f, 0xfc, 0x0f, 0xf0, 0x0f, 0xff, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xf8, 0x0f, 0x80, 0x1f, 0xfc, 0x07, 0xf0, 0x0f, 0xff, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xf8, 0x0f, 0x00, 0x1f, 0xfe, 0x07, 0xc0, 0x1f, 0xff, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xfc, 0x04, 0x00, 0x3f, 0xfe, 0x03, 0x80, 0x3f, 0xff, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xfe, 0x00, 0x00, 0x3f, 0xff, 0x03, 0x00, 0x7f, 0xff, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x7f, 0xff, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xff, 0x80, 0x18, 0x7f, 0xff, 0x00, 0x01, 0xff, 0xff, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x3f, 0xff, 0xff, 0x80, 0x03, 0xff, 0xff, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 0xff, 0xff, 0xff, 0x80, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xff, 0xf1, 0xff, 0xff, 0xff, 0x80, 0x0f, 0xff, 0xff, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x3f, 0xff, 0xff, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe3, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };

const float BETA = 3950;  // should match the Beta Coefficient of the thermistor
const float BETA2 = 3950; // should match the Beta Coefficient of the thermistor
int fanPin = 11;
float motor_celsius ;    // temp
float unit_celsius ;     // temp
float higher_temp;       // Higher temp
int tempMin = 10; // the temperature to start the fan 0%
int tempMax = 65; // the maximum temperature when fan is at 100%
int fanLCD;
int fanSpeed;

int led = 8;
int error_code = 0 ; // 0 ok // 1 low temp // 2 high temp 



void setup() {
  Serial.begin(9600);

  // SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally
  if(!display.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDRESS)) {
    Serial.println(F("SSD1306 allocation failed"));
    for(;;); // Don't proceed, loop forever
  }

  display.clearDisplay();
  display.drawBitmap(0, 0, batman, 128, 64, WHITE);
  display.display();
  delay(500);
  display.setTextSize(1);                      // Normal 1:1 pixel scale
  display.setTextColor(SSD1306_BLACK);        // Draw white text
  display.setCursor(90,56);
  display.print(F("zoliaz"));
  display.setCursor(101,5);
  display.print(F("V0.1"));
  display.display();
  delay(1500);
}


void loop() {

  temp_check();

  switch (error_code){

    case 1 :
      analogWrite(fanPin, 255);                      //SAFE!!! Fan Speed MAX
      display.clearDisplay();
      display.setTextSize(1);                      // Normal 1:1 pixel scale
      display.setTextColor(SSD1306_WHITE);        // Draw white text
      display.setCursor(10,10); 
      display.println("Low temp error!");
      display.print("Fan speed:");
      display.print(fanLCD);
      display.println("%");
      display.display();
    break;

    case 2 :
      analogWrite(fanPin, 0);                      //SAFE!!! Fan Speed MAX
      display.clearDisplay();
      display.setTextSize(1);                      // Normal 1:1 pixel scale
      display.setTextColor(SSD1306_WHITE);        // Draw white text
      display.setCursor(10,10); 
      display.println("High temp error!");
      display.print("Fan speed:");
      display.print(fanLCD);
      display.println("%");
      display.display();
    break;

    case 0 :
      temp_screen();

      if ((motor_celsius <= 20 ) && (unit_celsius <= 20)) {
        analogWrite(fanPin, 255);
      }
      else if ((motor_celsius <= 35 ) && (unit_celsius <= 35)) {
        analogWrite(fanPin, 240);
        Serial.print("Fan fokozat: 1");
        Serial.print(" ___ ");
      }
      else if ((motor_celsius <= 45 ) && (unit_celsius <= 45)) {
        Serial.print("Fan fokozat: 2");
        Serial.print(" ___ ");
      }
      else if ((motor_celsius <= 55 ) && (unit_celsius <= 55)) {
        analogWrite(fanPin, 100);
        Serial.print("Fan fokozat: 3");
        Serial.print(" ___ ");
      }
      else if ((motor_celsius <= 65 ) && (unit_celsius <= 65)) {
        analogWrite(fanPin, 1);
        Serial.print("Fan fokozat: 4");
        Serial.print(" ___ ");
        //testanimate(logo_bmp, LOGO_WIDTH, LOGO_HEIGHT);
      }
      else {      //Only debug, if is "void temp check" min/max "IF" disable (3pcs if )
        analogWrite(fanPin, 255);
        display.clearDisplay();
        display.setTextSize(1);
        display.setTextColor(SSD1306_WHITE);      
        display.setCursor(10,15);
        display.print("Temperature outside the regulated range!");
        Serial.println("Temperature outside the regulated range!");
        delay(2000);
        //display.display();
      }
    break;

    default:     //if nothing else matches, do the default
      Serial.print("BUG error !");
    break;
  }

 delay (1);
}


void temp_screen(void) {
  display.clearDisplay();

  display.setTextSize(1);                       // Normal 1:1 pixel scale
  display.setTextColor(SSD1306_WHITE);         // Draw white text
  display.setCursor(10,15);                   // Start at top-left corner
  display.print("BLDC temp: ");
  display.print(motor_celsius,1);
  display.println("C");

  display.setTextSize(1);
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(10,30);   
  display.print("Unit temp: ");
  display.print(unit_celsius,1);
  display.println("C");
/*
 display.setTextSize(1);
 display.setTextColor(SSD1306_WHITE);
 display.setCursor(30,56); 
 display.print("higher: ");
 display.print(higher_temp,1);
*/
  //display.display();
 //delay(5);
}

void temp_check(void) {
  int NTCmotor_analogValue = analogRead(A0);
  motor_celsius = 1 / (log(1 / (1023. / NTCmotor_analogValue - 1)) / BETA + 1.0 / 298.15) - 273.15;
  int NTCunit_analogValue = analogRead(A1);
  unit_celsius = 1 / (log(1 / (1023. / NTCunit_analogValue - 1)) / BETA2 + 1.0 / 298.15) - 273.15;
  Serial.print("motor temp: ");
  Serial.print(motor_celsius);
  Serial.print("_________ "); 
  Serial.print("unit temp: ");
  Serial.print(unit_celsius);
  Serial.print("_________ ");
  Serial.print("error_code: ");
  Serial.println(error_code);

  if (motor_celsius <= unit_celsius) {
    higher_temp = unit_celsius;
  }
  else {
    higher_temp = motor_celsius;
  }
 display.setTextSize(1);
 display.setTextColor(SSD1306_WHITE);
 display.setCursor(5,54); 
 display.print("Debug higher: ");
 display.print(higher_temp,1);
 display.println("C");
 display.display();




  fanLCD = map(motor_celsius, tempMin, tempMax, 0, 100);

   // ide mehetne egy switch Case of #zoliaz
  /*if( (unit_celsius <= tempMin) || (motor_celsius <= tempMin) )   // if temp is lower than minimum temp         OKKK
   {
   //int fanPin = 0; // fan is not spinning
   //analogWrite(fanPin, fanPin);
   fanLCD=0;
   //digitalWrite(fanPin, 1);
   error_code= 1;
  }

  if(  ( (unit_celsius >= tempMin) && (motor_celsius >= tempMin) ) && ( (unit_celsius <= tempMax) && (unit_celsius <= tempMax) )  ) // if temperature is higher than minimum temp
   {
   fanSpeed = motor_celsius;//map(temp, tempMin, tempMax, 0, 100); // the actual speed of fan//map(temp, tempMin, tempMax, 32, 255);
   int fanSpeed =1.5*fanSpeed ;
   //fanLCD = map(motor_celsius, tempMin, tempMax, 0, 100); // speed of fan to display on LCD100 //arányositás
   //display.print(fanLCD);
   display.display();
   analogWrite(fanPin, fanSpeed); // spin the fan at the fanPin speed
   error_code = 0;
  }
 
  if((unit_celsius >= tempMax) || (motor_celsius >= tempMax)) // if temp is higher than tempMax         OKKK
   {
   digitalWrite(fanPin, HIGH); // turn on led
   error_code = 2;
  }

  else // else 
   {
     //display.clearDisplay();
     //display.display();
   digitalWrite(fanPin, HIGH);
   }
*/   
}



#define XPOS   0 // Indexes into the 'icons' array in function below
#define YPOS   1
#define DELTAY 2

void testanimate(const uint8_t *bitmap, uint8_t w, uint8_t h) {
  int8_t f, icons[NUMFLAKES][3];

  // Initialize 'snowflake' positions
  for(f=0; f< NUMFLAKES; f++) {
    icons[f][XPOS]   = random(1 - LOGO_WIDTH, display.width());
    icons[f][YPOS]   = -LOGO_HEIGHT;
    icons[f][DELTAY] = random(1, 6);
    Serial.print(F("x: "));
    Serial.print(icons[f][XPOS], DEC);
    Serial.print(F(" y: "));
    Serial.print(icons[f][YPOS], DEC);
    Serial.print(F(" dy: "));
    Serial.println(icons[f][DELTAY], DEC);
  }


  for(;;) { // Loop forever...
    display.clearDisplay(); // Clear the display buffer

    // Draw each snowflake:
    for(f=0; f< NUMFLAKES; f++) {
      display.drawBitmap(icons[f][XPOS], icons[f][YPOS], bitmap, w, h, SSD1306_WHITE);
    }

    display.display(); // Show the display buffer on the screen
    delay(1);        // Pause for 1/10 second  SNOWSPEED

    // Then update coordinates of each flake...
    for(f=0; f< NUMFLAKES; f++) {
      icons[f][YPOS] += icons[f][DELTAY];
      // If snowflake is off the bottom of the screen...
      if (icons[f][YPOS] >= display.height()) {
        // Reinitialize to a random position, just off the top
        icons[f][XPOS]   = random(1 - LOGO_WIDTH, display.width());
        icons[f][YPOS]   = -LOGO_HEIGHT;
        icons[f][DELTAY] = random(1, 6);
      }
    }
  }
}